[ CAS No. 455-88-9 ]

Name: 455-88-9|1-Fluoro-2-methyl-4-nitrobenzene|98%
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Quality Control of [ 455-88-9 ]

COA NMR CNMR HPLC LC-MS

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SDS Specification

Alternatived Products of [ 455-88-9 ]

Product Details of [ 455-88-9 ]

CAS No. :	455-88-9	MDL No. :	MFCD00007284
Formula :	C₇H₆FNO₂	Boiling Point :	-
Linear Structure Formula :	-	InChI Key :	XUCYJGMIICONES-UHFFFAOYSA-N
M.W :	155.13	Pubchem ID :	68001
Synonyms :

Calculated chemistry of [ 455-88-9 ]

Physicochemical Properties

Num. heavy atoms :	11
Num. arom. heavy atoms :	6
Fraction Csp3 :	0.14
Num. rotatable bonds :	1
Num. H-bond acceptors :	3.0
Num. H-bond donors :	0.0
Molar Refractivity :	40.19
TPSA :	45.82 Å²

Pharmacokinetics

GI absorption :	High
BBB permeant :	Yes
P-gp substrate :	No
CYP1A2 inhibitor :	Yes
CYP2C19 inhibitor :	No
CYP2C9 inhibitor :	No
CYP2D6 inhibitor :	No
CYP3A4 inhibitor :	No
Log Kp (skin permeation) :	-5.25 cm/s

Lipophilicity

Log Po/w (iLOGP) :	1.63
Log Po/w (XLOGP3) :	2.81
Log Po/w (WLOGP) :	2.46
Log Po/w (MLOGP) :	2.44
Log Po/w (SILICOS-IT) :	0.54
Consensus Log Po/w :	1.98

Druglikeness

Lipinski :	0.0
Ghose :	None
Veber :	0.0
Egan :	0.0
Muegge :	1.0
Bioavailability Score :	0.55

Water Solubility

Log S (ESOL) :	-2.91
Solubility :	0.191 mg/ml ; 0.00123 mol/l
Class :	Soluble
Log S (Ali) :	-3.43
Solubility :	0.0577 mg/ml ; 0.000372 mol/l
Class :	Soluble
Log S (SILICOS-IT) :	-2.43
Solubility :	0.576 mg/ml ; 0.00372 mol/l
Class :	Soluble

Medicinal Chemistry

PAINS :	0.0 alert
Brenk :	2.0 alert
Leadlikeness :	1.0
Synthetic accessibility :	1.6

Safety of [ 455-88-9 ]

Signal Word:	Warning	Class:	N/A
Precautionary Statements:	P261-P280-P305+P351+P338	UN#:	N/A
Hazard Statements:	H302+H312+H332-H315-H319-H335	Packing Group:	N/A
GHS Pictogram:

Application In Synthesis of [ 455-88-9 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

Upstream synthesis route of [ 455-88-9 ]
Downstream synthetic route of [ 455-88-9 ]

[ 455-88-9 ] Synthesis Path-Upstream 1~26

1
[ 455-88-9 ]
[ 452-66-4 ]

Reference： [1] Journal of the Indian Chemical Society, 1944, vol. 21, p. 112,114

2
[ 13290-74-9 ]
[ 455-88-9 ]

Yield	Reaction Conditions	Operation in experiment
90%	With silver fluoride In toluene at 150℃; for 12 h; Sealed tube	To an oven-dried resealable tube equipped with a stir bar was added aryl halide as depicted in FIG. 20 (0.12 mmol), BrettPhos (6.4 mg, 0.012 mmol, 10 mol percent), (COD)Pd(CH₂TMS)₂(2.3 mg, 0.006 mmol, 5 mol percent), AgF (23 mg, 0.18 mmol) and toluene (2 mL). The tube was then sealed with a screw-cap and taken out of the glove box, wrapped in aluminum foil and placed into a preheated oil bath at the indicated temperature with adequate stirring. After 12, the tube was removed from the oil bath and allowed to cool to room temperature. 4-Fluorotoluene (13.2 μL, 0.12 mmol, 1 equiv) and dodecane (27.3 μL, 0.12 mmol, 1 equiv) were added as standards. The reaction mixture was filtered through a glass filter and a plug of Celite.(R). to remove all solids. Then, it was analyzed by ¹⁹F NMR (282 MHz) for yield and GC for conversion.

Reference： [1] Patent: US2011/15401, 2011, A1, . Location in patent: Page/Page column 17
[2] Journal of the American Chemical Society, 1959, vol. 81, p. 315,316

3
[ 95-52-3 ]
[ 455-88-9 ]

Reference： [1] Journal of Organic Chemistry, 2006, vol. 71, # 10, p. 3952 - 3958
[2] Bulletin des Societes Chimiques Belges, 1960, vol. 69, p. 312 - 322
[3] Journal of Organic Chemistry, 1979, vol. 44, # 14, p. 2556 - 2560
[4] Patent: US4801717, 1989, A,

4
[ 7149-70-4 ]
[ 455-88-9 ]

Reference： [1] Applied Catalysis A: General, 2011, vol. 394, # 1-2, p. 191 - 194

5
[ 1195931-64-6 ]
[ 455-88-9 ]

Reference： [1] Science, 2009, vol. 325, # 5948, p. 1661 - 1664

6
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]

Reference： [1] Journal of Organic Chemistry, 1998, vol. 63, # 23, p. 8448 - 8454

7
[ 99-99-0 ]
[ 455-88-9 ]
[ 500-11-8 ]

Reference： [1] Journal of Fluorine Chemistry, 1996, vol. 77, # 1, p. 65 - 70

8
[ 99-08-1 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 455-94-7 ]

Reference： [1] Journal of Fluorine Chemistry, 1996, vol. 77, # 1, p. 65 - 70

9
[ 95-52-3 ]
[ 455-88-9 ]
[ 769-10-8 ]

Reference： [1] Chemische Berichte, 1929, vol. 62, p. 1804

10
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 437-86-5 ]

Reference： [1] Russian Journal of General Chemistry, 1996, vol. 66, # 11, p. 1831 - 1836

11
[ 95-52-3 ]
[ 7697-37-2 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 769-10-8 ]

Reference： [1] Journal of the Chemical Society, 1955, p. 4026

12
[ 455-88-9 ]
[ 63878-68-2 ]

Reference： [1] Journal of Fluorine Chemistry, 1996, vol. 77, # 1, p. 65 - 70

13
[ 455-88-9 ]
[ 27996-87-8 ]

Reference： [1] Canadian Journal of Chemistry, 1960, vol. 38, p. 712 - 719

14
[ 455-88-9 ]
[ 452-67-5 ]

Reference： [1] Bulletin des Societes Chimiques Belges, 1960, vol. 69, p. 312 - 322

15
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]

Reference： [1] Journal of Organic Chemistry, 1998, vol. 63, # 23, p. 8448 - 8454

16
[ 99-08-1 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 455-94-7 ]

Reference： [1] Journal of Fluorine Chemistry, 1996, vol. 77, # 1, p. 65 - 70

17
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 437-86-5 ]

Reference： [1] Russian Journal of General Chemistry, 1996, vol. 66, # 11, p. 1831 - 1836

18
[ 95-52-3 ]
[ 7697-37-2 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 769-10-8 ]

Reference： [1] Journal of the Chemical Society, 1955, p. 4026

19
[ 95-52-3 ]
[ 455-88-9 ]
[ 769-10-8 ]

Reference： [1] Chemische Berichte, 1929, vol. 62, p. 1804

20
[ 95-52-3 ]
[ 7697-37-2 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 769-10-8 ]

Reference： [1] Journal of the Chemical Society, 1955, p. 4026

21
[ 455-88-9 ]
[ 452-68-6 ]

Reference： [1] Journal of the Indian Chemical Society, 1944, vol. 21, p. 112,114

22
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 437-86-5 ]

Reference： [1] Russian Journal of General Chemistry, 1996, vol. 66, # 11, p. 1831 - 1836

23
[ 455-88-9 ]
[ 452-69-7 ]

Reference： [1] Journal of the American Chemical Society, 1959, vol. 81, p. 94,95, 97
[2] Canadian Journal of Chemistry, 1958, vol. 36, p. 238
[3] Journal of the Indian Chemical Society, 1944, vol. 21, p. 112,114
[4] Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1985, vol. 39, # 3, p. 213 - 217
[5] Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 23, p. 6492 - 6499

24
[ 125620-28-2 ]
[ 455-88-9 ]
[ 452-69-7 ]

Reference： [1] Patent: US6162927, 2000, A,

25
[ 455-88-9 ]
[ 97389-11-2 ]

Reference： [1] Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry, 1985, vol. 39, # 3, p. 213 - 217

26
[ 455-88-9 ]
[ 112900-82-0 ]

Reference： [1] Chemical and Pharmaceutical Bulletin, 2001, vol. 49, # 4, p. 353 - 360
[2] Patent: WO2015/38417, 2015, A1,
[3] Journal of Medicinal Chemistry, 2017, vol. 60, # 12, p. 5099 - 5119
[4] Patent: WO2005/105761, 2005, A1,

[ 455-88-9 ] Synthesis Path-Downstream 1~68

1
[ 455-88-9 ]
[ 452-69-7 ]

Yield	Reaction Conditions	Operation in experiment
	With tin(II) chloride dihdyrate; In ethyl acetate; for 2.5h;Reflux; Inert atmosphere;	General procedure: A mixture of 10, (7.8 mmol) and SnCl2.2H2O (39 mmol) in EtOAc (75 mL) was stirred at reflux under nitrogen for 2.5 h. Upon cooling, saturated NaHCO3 (150 mL) was added. The organic layer was separated and the aqueous layer washed with EtOAc (2 × 100 mL). The combined organic layers were dried (Na2SO4) and concentrated to dryness to give 11 as a white solid (86percent).

Reference： [1]Journal of the American Chemical Society,1959,vol. 81,p. 94,95, 97
[2]Canadian Journal of Chemistry,1958,vol. 36,p. 238
[3]Journal of the Indian Chemical Society,1944,vol. 21,p. 112,114
[4]Acta chemica Scandinavica. Series B: Organic chemistry and biochemistry,1985,vol. 39,p. 213 - 217
[5]Bioorganic and Medicinal Chemistry Letters,2013,vol. 23,p. 6492 - 6499

2
[ 13290-74-9 ]
[ 455-88-9 ]

Yield	Reaction Conditions	Operation in experiment
90%	With silver fluoride;bis[(trimethylsilyl)methyl](1,5-cyclooctadiene)palladium(II); dicyclohexyl-(2?,4?,6?-triisopropyl-3,6-dimethoxy-[1,1?-biphenyl]-2-yl)phosphine; In toluene; at 150℃; for 12h;Sealed tube;	To an oven-dried resealable tube equipped with a stir bar was added aryl halide as depicted in FIG. 20 (0.12 mmol), BrettPhos (6.4 mg, 0.012 mmol, 10 mol %), (COD)Pd(CH2TMS)2 (2.3 mg, 0.006 mmol, 5 mol %), AgF (23 mg, 0.18 mmol) and toluene (2 mL). The tube was then sealed with a screw-cap and taken out of the glove box, wrapped in aluminum foil and placed into a preheated oil bath at the indicated temperature with adequate stirring. After 12, the tube was removed from the oil bath and allowed to cool to room temperature. 4-Fluorotoluene (13.2 muL, 0.12 mmol, 1 equiv) and dodecane (27.3 muL, 0.12 mmol, 1 equiv) were added as standards. The reaction mixture was filtered through a glass filter and a plug of Celite to remove all solids. Then, it was analyzed by 19F NMR (282 MHz) for yield and GC for conversion.

Reference： [1]Patent: US2011/15401,2011,A1 .Location in patent: Page/Page column 17
[2]Journal of the American Chemical Society,1959,vol. 81,p. 315,316

3
[ 455-88-9 ]
[ 454-15-9 ]

Yield	Reaction Conditions	Operation in experiment
63%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile);Reflux;	A mixture of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (0.750 g, 4.83 mmol), NBS (1.549 g, 8.70 mmol) and AIBN (0.159 g, 0.967 mmol) in trifluorotoluene (15 ml) was heated to reflux overnight. The mixture was cooled RT, the solids removed via filtration and the filtrate concentrated to dryness and purified via silica gel chromatography (EtOAc/Hex) to afford 80percent pure 2-(bromomethyl)-1-fluoro-4-nitrobenzene (956 mg, 63percent yield).
50%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); at 80℃;	A mixture of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (2.5 g, 16.12 mmol) and NBS (3.16 g, 17.73 mmol) in trifluorotoluene (45 mL) was treated with AIBN (66 mg, 0.403 mmol) and heated at 80° C. overnight. The mixture was cooled to RT, the solids removed via filtration and the filtrate concentrated to dryness. The residue was dissolved in EtOAc, washed with water, then brine, dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography (EtOAc/Hex) to afford 2-(bromomethyl)-1-fluoro-4-nitrobenzene (1.915 g, 50percent yield). 1H NMR (400 MHz, DMSO-d6): delta 8.53-8.52 (m, 1H), 8.28 (ddd, J=9.1, 4.4, 3.0 Hz, 1H), 7.55 (t, J=9.2 Hz, 1H), 4.80 (s, 2H).
32%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); In tetrachloromethane; for 16h;Reflux;	Example 26A2-(Bromomethyl)-1-fluoro-4-nitrobenzene 186 g (1.20 mol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> are dissolved in 1.2 l of carbon tetrachloride, and 214 g (1.20 mol) of N-bromosuccinimide are added. 19.7 g (120 mmol) of azodiisobutyronitrile are added, and the mixture is heated under reflux. After 16 h, the mixture is allowed to cool, filtered and evaporated to dryness under reduced pressure. The residue is dissolved in 300 ml of dichloromethane, and 300 g of sea sand are added. Once more, the mixture is then concentrated to dryness under reduced pressure, and the residue is applied to a 1 kg silica gel column. The product is chromatographed using a 20:1 mixture of cyclohexane and ethyl acetate, and the product fractions are evaporated to dryness under reduced pressure. The residue is crystallized with cyclohexane and dried under reduced pressure. This gives 92 g (32percent of theory) of the desired product.1H-NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.57-8.52 (m, 1H), 8.33-8.27 (m, 1H), 7.56 (t, 1H), 4.62 (s, 2H).GC-MS (method 9): Rt=7.79 minMS (ESIpos): m/z=154 (M-Br)+

32%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); In tetrachloromethane; for 16h;Reflux;	186 g (1.2 mol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> are dissolved in 1.2 l of tetrachloromethane and admixed with 214 g (1.20 mol) of N-bromosuccinimide. 19.7 g (120 mmol) of azodiisobutyronitrile are added and the mixture is heated under reflux. After 16 h, the mixture is allowed to cool, filtered and concentrated to dryness under reduced pressure. The residue is dissolved in 300 ml of dichloromethane and admixed with 300 g of Seesand. Then the mixture is concentrated to dryness under reduced pressure again, and the residue is applied to a 1 kg silica gel column. It is chromatographed with a 20:1 mixture of cyclohexane and ethyl acetate, and the product fractions are concentrated to dryness under reduced pressure. The residue is crystallized with cyclohexane and dried under reduced pressure. This affords 92 g (32percent of theory) of the desired product. 1H NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.57-8.52 (m, 1H), 8.33-8.27 (m, 1H), 7.56 (t, 1H), 4.62 (s, 2H). GC-MS (Method 9): Rt=7.79 min MS (ESIpos): m/z=154 (M-Br)+
28%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); In chloroform; for 18h;Reflux;	905 g (5.83 mol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> and 1038 g (5.83 mol) of N-bromosuccinimide were introduced as initial charge in 5.83 l of chloroform, 47.8 g (0.29 mol) of 2,2?-azobis[isobutyronitrile] were added and the reaction mixture was heated at reflux for 18 h. After cooling to RT, the liquid was filtered off from the solid by suction and the filtrate was divided into three portions. These were absorbed in each case on 1.5 kg of silica gel (0.06-0.2) and chromatographically purified on in each case 10 kg of silica gel with 160 l of ethyl acetate:petroleum ether (2.5:97.5). The product fractions were combined and evaporated to dryness on a rotary evaporator, and the residue was extracted by stirring with petroleum ether for 10 min. The solid was filtered off with suction, after-washed with petroleum ether and dried in vacuo. 385 g (28percent) were obtained. [0120] HPLC (method 3): Rt=3.95 min. [0121] 1H NMR (400 MHz, DMSO-d6): delta [ppm]=4.82 (s, 2H), 7.57 (t, 1H), 8.30 (ddd, 1H), 8.55 (dd, 1H). [0122] MS (EI+): [M-Br]+ 154.
18%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile);Reflux;	A mixture of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (2.5 g, 16.12 mmol) NBS (5.02 g, 28.2 mmol) and AIBN (265 mg, 1.612 mmol) in trifluorotoluene (45 mL) was heated to reflux overnight. The mixture was cooled to RT, filtered to remove solids and the filtrate concentrated to dryness. The residue was dissolved in Et2O, washed with water, then brine, dried over Na2SO4, concentrated to dryness and purified via silica gel chromatography (EtOAc/Hex) to afford 2-(bromomethyl)-1-fluoro-4-nitrobenzene (698 mg, 18percent yield). 1H NMR (400 MHz, DMSO-d6): delta 8.53 (dd, J=6.4, 3.0 Hz, 1H), 8.28 (ddd, J=9.1, 4.4, 3.0 Hz, 1H), 7.55 (t, J=9.2 Hz, 1H), 4.80 (s, 2H).
18%	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile);Reflux;	Example 94: A mixture of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (2.5 g, 16.12 mmol)NBS (5.02 g, 28.2 mmol) and AIBN (265 mg, 1.612 mmol) in trifluorotoluene (45 mL) washeated to reflux overnight. The mixture was cooled toRT, filtered to remove solids and thefiltrate concentrated to dryness. The residue was dissolved in Et20, washed with water, thenbrine, dried over Na2S04, concentrated to dryness and purified via silica gel chromatography(EtOAc/Hex) to afford 2-(bromomethyl)-1-fluoro-4-nitrobenzene (698 mg, 18percent yield). 1HNMR (400 MHz, DMSO-d6): 8 8.53 (dd, J = 6.4, 3.0 Hz, 1 H), 8.28 (ddd, J = 9.1, 4.4, 3.0 Hz,1 H), 7.55 (t, J = 9.2 Hz, 1 H), 4.80 (s, 2 H).
	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); 2,3,4-trifluorotoluene;Reflux;	Example D3: A mixture of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (2.5 g, 16.12mmol) and NBS (3.16 g, 17.73 mmol) in trifluorotoluene (45 mL) was treated with AIBN (66mg, 0.403 mmol) and heated at 80°C overnight. The mixture was cooled to RT, the solidsremoved via filtration and the filtrate concentrated to dryness. The residue was dissolved inEtOAc, washed with water, then brine, dried over Na2S04, concentrated to dryness andpurified via silica gel chromatography (EtOAc/Hex) to afford 2-(bromomethyl)-1-fluoro-4-nitrobenzene (1.915 g, 50percent yield). 1H NMR (400 MHz, DMSO-d6): 8 8.53-8.52 (m, 1 H),8.28 (ddd, J = 9.1, 4.4, 3.0 Hz, 1 H), 7.55 (t, J = 9.2 Hz, 1 H), 4.80 (s, 2 H).
	With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); In tetrachloromethane; for 48h;Reflux;	9.31 g 2-Fluoro-5-nitrotoluene (60 mmol) was dissolved in 100 ml carbon tetrachloride, 10.68 g N-bromosuccinimide (60 mmol) and 1.97 g 2,2?-Azobis(2-methyl)propionitrile (12 mmol) were added. Mixture was refluxed for two days. Then it was cooled to room temperature and the precipitated solid was filtered off. The filtrate was evaporated under reduced pressure and used up directly in the next step without any further purification or analytical investigation. Yield was considered as it had been 100percent.

Reference： [1]Journal of Medicinal Chemistry,1994,vol. 37,p. 1362 - 1370
[2]Tetrahedron Letters,2005,vol. 46,p. 3633 - 3635
[3]Journal of Medicinal Chemistry,2009,vol. 52,p. 1828 - 1844
[4]Patent: US8461179,2013,B1 .Location in patent: Page/Page column 69
[5]Patent: US8461179,2013,B1 .Location in patent: Page/Page column 70
[6]Patent: US2010/184740,2010,A1 .Location in patent: Page/Page column 30-31
[7]Patent: US2010/298293,2010,A1 .Location in patent: Page/Page column 23
[8]Patent: US2013/116443,2013,A1 .Location in patent: Paragraph 0119; 0120; 0121; 0122
[9]Patent: US8461179,2013,B1 .Location in patent: Page/Page column 124
[10]Patent: WO2013/184119,2013,A1 .Location in patent: Paragraph 0372
[11]Journal of general chemistry of the USSR,1967,vol. 37,p. 764 - 766
Zhurnal Obshchei Khimii,1967,vol. 37,p. 814 - 817
[12]Patent: WO2013/184119,2013,A1 .Location in patent: Paragraph 0216
[13]Patent: US2014/57911,2014,A1 .Location in patent: Paragraph 0356; 0357

4
[ 142-26-7 ]
[ 455-88-9 ]
[ 70320-88-6 ]

Reference： [1]Journal of Organic Chemistry,1979,vol. 44,p. 2556 - 2560

5
[ 99-08-1 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 455-94-7 ]

Reference： [1]Journal of Fluorine Chemistry,1996,vol. 77,p. 65 - 70

6
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 437-86-5 ]

Reference： [1]Russian Journal of General Chemistry,1996,vol. 66,p. 1831 - 1836

7
[ 95-52-3 ]
[ 455-88-9 ]
[ 1427-07-2 ]

Reference： [1]Journal of Organic Chemistry,1998,vol. 63,p. 8448 - 8454

8
[ 95-52-3 ]
[ 7697-37-2 ]
[ 455-88-9 ]
[ 1427-07-2 ]
[ 769-10-8 ]

Reference： [1]Journal of the Chemical Society,1955,p. 4026

9
[ 455-88-9 ]
methanolic KOH-solution [ No CAS ]
[ 50741-92-9 ]

Reference： [1]Chemische Berichte,1929,vol. 62,p. 1804
[2]Chemische Berichte,1929,vol. 62,p. 1804

10
[ 455-88-9 ]
[ 112900-82-0 ]

Reference： [1]Chemical and Pharmaceutical Bulletin,2001,vol. 49,p. 353 - 360
[2]Patent: WO2015/38417,2015,A1
[3]Journal of Medicinal Chemistry,2017,vol. 60,p. 5099 - 5119
[4]Patent: WO2005/105761,2005,A1

11
[ 455-88-9 ]
[ 394-30-9 ]

Reference： [1]Journal of the Indian Chemical Society,1944,vol. 21,p. 112,114

12
[ 455-88-9 ]
[ 697299-78-8 ]

Yield	Reaction Conditions	Operation in experiment
98%		The procedure described in Example 1 was repeated using glycolic acid and 5-[(lR)-l- methyl-2-(methylamino) ethoxy]-N-{3-methyl-4-[(6-methylpyridin-3-yl) oxy] phenyl} quinazolin-4-amine to give the title compound in 86percent yield; NMR spectrum (CDCl3) 1.55 (d, 3H), 2.30 (s, 3H), 2.53 (s, 3H), 2.96 (s, 3H), 3.59 (dd, 1H), 4.16-4. 07 (m, 3H), 5.08 (m, 1H), 6.92 (d, 1H), 7.02 (d, 1H), 7.09 (d, 1H), 7.14 (d, 1H), 7.50 (m, 2H), 7.65 (m, 2H), 8. 28 (s, 1H), 8.61 (s, 1H), 9.87 (s 1H); Mass spectrum: MH"488. The 5- [ (lR)-1-methyl-2- (methylamino) ethoxy]-N-{3-methyl-4- [ (6-methylpyridin-3- yl) oxy] phenyl} quinazolin-4-amine used as starting material was prepared as follows: Sodium hydride (25.6 g, 60percent dispersion in oil, 0.64 mol) was added portion wise to a solution of 5-hydroxy-2-methylpyridine (70 g, 0.64 mol) in DMA (700 ml) while keeping the temperature below 40°C. At the end of the addition, the mixture was stirred at room temperature for 1 hour and <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (91.3 g, 0.59 mol) in DMA (100 ml) was added slowly. The mixture was stirred at 80°C for 3 hours and then cooled. The solvents were evaporated under vacuum and the residue was partitioned between ethyl acetate and water. The organic layer was washed with water and brine, dried over MgS04. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 30percent ethyl acetate in petroleum ether) to give 2-methyl-5- (2-methyl-4-nitrophenoxy) pyridine (141 g, 98percent) as an oil; NMR spectrum (CDC13) ; 2.43 (s, 3H), 2.59 (s, 3H), 6.74 (d, 1H), 7.21 (d, 1H), 7.27 (d, 1H), 8.00 (d, 1H), 8.17 (s, 1H), 8.32 (s, 1H). A mixture of 2-methyl-5- (2-methyl-4-nitrophenoxy) pyridine (141 g, 0. 58 mol) and 10percent palladium on charcoal (13 g) in ethyl acetate (200 ml) and ethanol (700 ml) was stirred under an atmosphere of hydrogen (1.2 bar) for 5 hours. After reaction completion, the mixture was purged with nitrogen and the catalyst was filtered off. The filtrate was evaporated to dryness to give 3-methyl-4- [ (6-methylpyridin-3-yl) oxy] aniline (120.6 g, 98percent) as a white solid; Mass spectrum Mus 215. 3-Methyl-4-[(6-methylpyridin-3-yl) oxy] aniline (6.42 g, 30 mmol) and 4N hydrogen chloride in dioxane (7.55 ml, 30 mmol) were added to a suspension of 4-chloro-5- fluoroquinazoline (5 g, 27.5 mmol; obtained as described in PCT Int. Appl. W02001094341, AstraZeneca) in acetonitrile (100 ml). The mixture was stirred at 80°C for 2 hours. After cooling, the precipitate was washed with acetonitrile. This precipitate was partitioned between DCM and 5percent aqueous sodium bicarbonate and the pH was adjusted to 8. The organic layer was washed with brine and dried over MgS04. Evaporation of the solvents gave 5-fluoro-N- 13-methyl-4-[(6-methylpyridin-3-yl) oxy] phenyl} quinazolin-4-amine (9.3 g, 94percent) as a dark gum which crystallised on standing; NMR spectrum (CDC13) ; 2.30 (s, 3H), 2.54 (s, 3H), 6.93 (d, 1H), 7.15-7. 08 (m, 2H), 7.22 (m, 1H), 7.56 (d, 1H), 7.63 (s, 1H), 7.71 (m, 2H), 8.27 (s, 1H), 8.37 (d, 1H), 8.71 (s, 1H). Sodium hydride (960 mg, 60percent dispersion in oil, 20 mmol) was added portion wise to an ice-cooled solution of (2R)-l- [allyl (methyl) amino] propan-2-ol (3.87 g, 30 mmol, obtained as described in Example 2.3, preparation of starting materials) and 5-fluoro-N- {3-methyl-4- [(6-methylpyridin-3-yl) oxy] phenyl} quinazolin-4-amine (3.6 g, 10 mmol) in THF (25 ml). The mixture was heated at 65°C for 24 hours. After cooling, the solvents were evaporated under vacuum. The mixture was diluted with DCM, and washed with water and brine. The organic layer was dried over MgS04. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 2 to 4percent methanol in DCM) to give 5-{(1R)-2- [allyl (methyl) amino]-l-methylethoxy}-N-{3-methyl-4-[(6-methylpyridin-3- yl) oxy] phenyl} quinazolin-4-amine (2.4 g, 51percent) as a brown oil; Mass spectrum: MCF 470. A mixture of 5-{(1R)-2-[allyl (methyl) amino]-1-methylethoxy}-N-{3-methyl-4-[(6- methylpyridin-3-yl) oxy] phenyl} quinazolin-4-amine (2.25 g, 4.8 mmol) and chlorotris (triphenylphosphine) rhodium (I) (463 mg, 0.48 ml) in acetonitrile-water (17 ml: 3 ml) was heated at reflux for 3 hours. After cooling, the solvents were evaporated under vacuum. The residue was purified by chromatography on silica gel (eluant: 2 to 4percent methanol in DCM) to give 5-[(lR)-l-methyl-2-(methylamino) ethoxy]-N-{3-methyl-4-[(6- methylpyridin-3-yl) oxy] phenyl} quinazolin-4-amine (1.70 g, 83 percent); Mass spectrum : MH+ 430.
98%		Sodium hydride (25.6 g, 60percent dispersion in oil, 0.64 mol) was added portion wise to a solution of 5-hydroxy-2-methylpyridine (70 g, 0.64 mol) in DMA (700 ml) while keeping the temperature below 40°C. At the end of the addition, the mixture was stirred at room temperature for 1 hour and <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (91.3 g, 0.59 mol) in DMA (100 ml) was added slowly. The mixture was stirred at 80°C for 3 hours and then cooled. The solvents were evaporated under vacuum and the residue was partitioned. between ethyl acetate and water. The organic layer was washed with water and brine, dried over MGS04. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 30percent ethyl acetate in petroleum ether) to give 2-METHYL-5- (2-METHYL-4-NITROPHENOXY) pyridine (141 g, 98percent) as an oil; NMR spectrum (CDC13) ; 2.43 (s, 3H), 2.59 (s, 3H), 6.74 (d, 1H), 7.21 (d, 1H), 7.27 (d, 1H), 8.00 (d, 1H), 8.17 (s, 1H), 8.32 (s, 1H).
81%		To a 500mL flask equipped with addition funnel at 0°C was added NaH (8.26 g, 95percent, 327 mmol), followed by slow addition of DMF (100 mL). The mixture was stirred for 10 minutes. The addition funnel was then charged with 6-methyl-pyridin-3-ol (30.2 g, 277 mmol) and DMF (100 mL), and the solution in addition funnel was added to the flask dropwise over 45 minutes. The reaction mixture was stirred at OoC for another 30 minutes once the addition was finished. To the addition funnel was then added 4-fluoro-3-methyl-nitrobenzene (39. 1 g, 252 mmol) and DMF (100 mL) and the resulting solution was added to the flask dropwise over 45 minutes. The cold bath was removed at the end of the addition and the reaction mixture was allowed to stir at room temperature for 15 hours. The red dark solution was cooled to 0°C and water (100 mL) was added cautiously to the reaction mixture. The resulting solution was stirred for 30 minutes and solid product was purified by filtration and washed with cold water (500 ML). The wet solid was dried in vacuo to give product (49.8 g, 81percent).

81%

Step A: 2-methyl-5-(2-methyl-4-nitro-phenoxy)-pyridine. To a 500 mL flask equipped with addition funnel at 0° C. was added NaH (8.26 g, 95percent, 327 mmol), followed by slow addition of DMF (100 mL). The mixture was stirred for 10 minutes. The addition funnel was then charged with 6-methyl-pyridin-3-ol (30.2 g, 277 mmol) and DMF (100 mL), and the solution in addition funnel was added to the flask dropwise over 45 minutes. The reaction mixture was stirred at 0oC. for another 30 minutes once the addition was finished. To the addition funnel was then added 4-fluoro-3-methyl-nitrobenzene (39.1 g, 252 mmol) and DMF (100 mL) and the resulting solution was added to the flask dropwise over 45 minutes. The cold bath was removed at the end of the addition and the reaction mixture was allowed to stir at room temperature for 15 hours. The red dark solution was cooled to 0° C. and water (100 mL) was added cautiously to the reaction mixture. The resulting solution was stirred for 30 minutes and solid product was purified by filtration and washed with cold water (500 mL). The wet solid was dried in vacuo to give product (49.8 g, 81percent).

Reference： [1]Patent: WO2005/51923,2005,A1 .Location in patent: Page/Page column 235-237
[2]Patent: WO2005/26152,2005,A1 .Location in patent: Page/Page column 148
[3]Patent: WO2004/46101,2004,A2 .Location in patent: Page 24-25
[4]Patent: US2005/101617,2005,A1 .Location in patent: Page/Page column 7-8

13
[ 2955-88-6 ]
[ 455-88-9 ]
[ 862874-65-5 ]

Yield	Reaction Conditions	Operation in experiment
43%	With caesium carbonate; In DMF (N,N-dimethyl-formamide); at 100℃;	3.2 g (20.2 mmol) 2-Fluoro-5-nitro toluene in 20 ml DMF are treated consecutively with 14 g (43 mmol) Cs2CO3 and 3.2 g (26.4 mmol) N- (2- Hydroxyethyl) pyrrolidine and stirred at 100 °C overnight. The reaction mixture is evaporated, the residue dissolved in water and extracted with dichloromethane. The combined organic phases are washed with water, dried using Na2SO4, filtered and evaporated. Yield : 2.3 g (43 percent) 26, brown-yellow crystals

Reference： [1]Patent: WO2005/75425,2005,A2 .Location in patent: Page/Page column 200

14
[ 13889-98-0 ]
[ 455-88-9 ]
[ 862685-95-8 ]

Yield	Reaction Conditions	Operation in experiment
96%	With 1-butyl-3-methylimidazolium Tetrafluoroborate; In acetonitrile; at 95℃;	Method 25 1-Acetyl-4- piperazine; 1-Butyl-3-methylimidazolium tetrafluoroborate (1.75g, 7. 74mmol) was added to a stirred solution of l-fluoro-2-methyl-4-nitrobenzene (12g, 77. 35mmol) and 1-acetylpiperazine (39.7g, 309. 4mmol) in acetonitrile (3ml). The reaction mixture was then heating at 95°C overnight. The reaction mixture was allowed to cool down to room temperature. The solution was diluted with EtOAc and water. The precipitate formed was filtered off to give a solid corresponding to the required product. The organics were washed with water (4 times), brine, dried and evaporation of solvent to give a solid. Both solids were combined and after trituration with isohexane/ether and filtration, the title compound was obtained as a yellow solid which was dried in vac oven overnight at 50°C. (19. 61g, 96percent). NMR (400MHz) 2.06 (s, 3H), 2.38 (s, 3H), 2.99 (dt, 4H), 3.61 (m, 4H), 7.14 (d, 1H), 8.04 (dd, 1H), 8.07 (d, 1H); m/z 264.

Reference： [1]Patent: WO2005/75461,2005,A1 .Location in patent: Page/Page column 101

15
[ 10341-26-1 ]
[ 455-88-9 ]
[ 869786-55-0 ]

Reference： [1]Patent: WO2005/111029,2005,A1 .Location in patent: Page/Page column 221-222

16
[ 455-88-9 ]
[ 108-95-2 ]
[ 171349-95-4 ]

Yield	Reaction Conditions	Operation in experiment
96%	In DMF (dimethylformamide)(1280 mL); water; ethyl acetate; N,N-dimethyl-formamide;	Preparation of 3methyl-4-phenoxynitrobenzene Sodium hydride (95percent dry powder) (83.62 g, 3.31 moles, 1.3 eq.) was charged under nitrogen atmosphere to a clean and dry 12 L four neck flask equipped with a condenser, a dropping funnel, a mechanical stirrer and two nitrogen inlet-outlet bubblers (Caution: sodium hydride is pyrophoric, avoid contact with water or moisture). The reaction flask was cooled to 0° C. (ice bath) then anhydrous DMF (1280 mL) was carefully added using a dropping funnel. The reaction mixture was stirred for 30 minutes at 0° C., then a solution of phenol (263.5 g, 2.8 moles, 1.1 eq.) in anhydrous DMF (1280 mL) was added using a dropping funnel over 2 hours (Caution: exothermic, vigorous hydrogen evolution). After complete addition, the reaction mixture was stirred for 40 minutes at 0° C. (the reaction mixture turned to a white slurry), then a solution of 3-methyl-4-fluoronitrobenzene (390.0 g, 2.51 moles, 1.0 eq.) in anhydrous DMF (dimethylformamide)(1280 mL) was added dropwise over 1 hour. The reaction mixture was slowly warmed to room temperature and stirred at room temperature for 15-22 hours (dark-brown viscous solution) until all the starting material was converted to the phenoxynitrotoluene (TLC, 2percent ethyl acetate in hexanes). Again the reaction mixture was cooled to 0° C. (ice bath), then carefully quenched with cold water (5000 mL) over 2 hours (Caution: exothermic, hydrogen evolution; first 100 ml water was added over 90 minutes). The reaction mixture was stirred for 1 h, then transferred to a two 50 L carboys, each containing 40 L of water. The contents was stirred and left at room temperature for 24 hours to afford the phenoxynitrotoluene, as a yellow solid. The yellow solid was filtered, washed with excess of water and air dried to afford 3-methyl-4-phenoxynitrobenzene (552 g, 96percent yield). The crude 3-methyl-4-phenoxynitrobenzene was found to be pure by 1H and 13C NMR spectra, and used as such in the next reaction; m p 51-52° C.; FT-IR (cm-1): 1582, 1509, 1480, 1339, 1242, 1204, 1091 and 796; 1H NMR (300 MHz, CDCl3) delta 2.41 (s, 3 H), 6.78 (d, 1H, J =8.7 Hz), 7.02-7.08 (m, 2 H), 7.19-7.29 (m, 1H), 7.38-7.46 (m, 2 H), 7.99 (dd, 1H, J =9.15 Hz, 2.7 Hz); 13C NMR (75.45 MHz, CDCl3) 16.22, 115.93, 119.11,123.17, 124.9, 126.79, 129.53, 130.28, 142.66, 155.44 and 161.4.
	With caesium carbonate; In N,N-dimethyl-formamide; at 120℃;	Step A: <strong>[455-88-9]1-Fluoro-2-methyl-4-nitrobenzene</strong> (9.75 g), phenol (7.10 g), and of Cs2CO3 (41.0 g) were dissolved in 100 mL of DMF and heated to 120° C. overnight. The reaction mixture was taken up in EtOAc and washed with water and brine, and dried over Na2SO4. The solution was concentrated to provide 2-methyl-4-nitro-1-phenoxybenzene as an oil, which was used in Step B without further purification.
	With caesium carbonate; In N,N-dimethyl-formamide; at 120℃;	l-Fluoro-2-methyl-4-nitrobenzene (9.75 g), phenol (7.10 g), and ofCs2CO3 (41.0 g) were dissolved in 100 mL of DMF and heated to 120 0C overnight. The reaction mixture was taken up in EtOAc and washed with water and brine, and dried over Na2SO4. The solution was concentrated to provide 2-methyl-4-nitro-l-phenoxybenzene as an oil, which was used in Step B without further purification.

Reference： [1]Patent: US6284764,2001,B1
[2]Patent: WO2020/68867,2020,A1 .Location in patent: Page/Page column 521-522
[3]Patent: US2006/94644,2006,A1 .Location in patent: Page/Page column 47
[4]Patent: WO2007/130743,2007,A2 .Location in patent: Page/Page column 92

17
[ 42508-74-7 ]
[ 455-88-9 ]
[ 330999-76-3 ]

Yield	Reaction Conditions	Operation in experiment
70%	With sodium hydride; In 1-Methylpyrrolidine; at 20℃; for 18h;	b) Sodium hydride (150 mg of an 80percent dispersion in mineral oil, 5.00 mmol) was added to a stirred solution of 2-(hydroxymethyl)-4-picoline (590 mg, 5.00 mmol) in N-methylpyrrolidine (20 ml) at ambient temperature. 2-Fluoro-5-nitrotoluene (775 mg, 5.00 mmol) was added, the reaction was stirred for 18 hours at ambient temperature and the reaction was poured into water (60 ml). Collection of the yellow solid which precipitated, followed by drying in vacuo, yielded 2-((4-methyl-2-pyridyl)methoxy)-5-nitrotoluene (900 mg, 70percent yield) as a yellow solid.

Reference： [1]Patent: US7081461,2006,B1 .Location in patent: Page/Page column 44

18
racemic 3-pyrrolidinol [ No CAS ]
[ 455-88-9 ]
[ 361346-59-0 ]

Yield	Reaction Conditions	Operation in experiment
93%	With sodium bicarbonate;P2O5; In 1,4-dioxane;	Step 1 Preparation of 1-(4-nitro-2-methylphenyl)-pyrrolidin-3-ol 2.4 g of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (0.0155 mol), 1.3 g of sodium hydrogen carbonate (0.0155 mol) and 15 ml of a dioxane/water mixture (8/2) were introduced into a three-necked flask. 1.35 g of racemic 3-pyrrolidinol (0.0155 mol) were rapidly added to this mixture. The heterogeneous mixture was refluxed (87° C.) for 24 hours. The reaction mixture was then poured into ice-cold water; an orange precipitate was obtained, which was filtered off and rinsed with water. After drying under vacuum in the presence of P2O5, 3.19 g of an orange solid were obtained (93percent yield). The 1H NMR analysis (DMSO-d6, 200 MHz, ppm), in accordance with the expected product, was as follows:

Reference： [1]Patent: US2003/93866,2003,A1

19
[ 455-88-9 ]
[ 57260-71-6 ]
[ 361345-36-0 ]

Yield	Reaction Conditions	Operation in experiment
62%	With potassium carbonate; In ethyl acetate; N,N-dimethyl-formamide;	6.1. tert-butyl 4-(2-methyl-4-nitrophenyl)-1-piperazinecarboxylate 4.65 g (3.10 mmol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong>, 6.71 g (3.60 mmol) of tert-butyl 1-piperazinecarboxylate and 10.4 g (7.50 mmol) of potassium carbonate are solubilized under an argon atmosphere, in dry DMF (50 ml), then the reaction medium is taken to 80 C. for 18 hours. The reaction medium is then cooled down using an ice bath then poured into ice-cold water. The product is extracted using 3 times 50 ml of ethyl acetate. The organic solution is dried over magnesium sulphate, followed by filtration and concentration under vacuum. Purification is then carried out by crystallization from diisopropyl ether and the solid obtained is filtered and rinsed with isopentane in order to obtain, after drying, 5.9 g of a yellow solid product (yield 62%). Melting point: 121.8-123.4 C.
49%	With potassium carbonate; In N,N-dimethyl-formamide; at 120℃; for 24h;Inert atmosphere;	Under an argon atmosphere, <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong>(7.93 g, 51.13 mmol), 1- (tert-butoxycarbonyl) piperazine (10 g, 53.69 mmol) in N, N- dimethylformamide(100 mL), potassium carbonate (17.66 g, 127.8 mmol) was added and the mixture was stirred at 120 C. for 24 hours. Ethyl acetate was added to the reaction solution and washed with water. The organic layer was dried over anhydrous magnesium sulfate, filtered, and the solvent was distilled off under reduced pressure.The resulting residue was purified by silica gel column chromatography (hexane / ethyl acetate) to give the title compound (8.13 g, 49%). Yellow oil
36%	With potassium carbonate; In N,N-dimethyl-formamide; at 50℃;Inert atmosphere;	A suspension of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (2.00 g,12.9 mmol), tert-butyl piperazine-1-carboxylate (2.40 g,12.9 mmol) and potassium carbonate (2.67 g, 19.3 mmol) inanhydrous DMF (10 mL) was heated to 50 C under anitrogen atmosphere overnight. The reaction mixture was allowed to cool to room temperature, diluted with water (200 mL) and stirred at room temperature for 15 minutes. The precipitated solid was isolated by filtration, washed with water and sucked dry to give the title compound as ayellow solid (1.51 g, 36%) . LCMS (Method A) : = 1.52 mi m/z = 222 [M-Boc+H].

	With potassium carbonate; In N,N-dimethyl-formamide;	Step A. 4-(2-Methyl-4-nitro-phenyl)-piperazine-1-carboxylic acid tert-butyl ester. The compound was prepared according to the process described in Example I-A, Step A. More particularly, a mixture of piperazine-1-carboxylic acid tert-butyl ester (8.82 g, 47.4 mmol), <strong>[455-88-9]1-fluoro-2-methyl-4-nitro-benzene</strong> (7.36 g, 47.4 mmol), potassium carbonate (19.7 g, 142.75 mmol) and DMF (95 ml.) was used in the reaction to yield the product. MS (ESI) mass calculated for C16H23N3O4, 321.38; m/z measured, 322.2 [M+H]+
	With potassium carbonate; In dimethyl sulfoxide; at 0 - 80℃; for 8h;	General procedure: To a solution of 1-fluoro-4-nitrobenzene (5 g, 35.5 mmol) in DMSO(100 mL) was added K2CO3 (14.6 g, 106.4 mmol) at room temperature.And a solution of tert-butyl piperazine-1-carboxylate (3.5 g, 35.5 mmol)in DMSO (50 mL) was added dropwise to the mixture at 0 °C. The reactionmixture was stirred at 80 °C for 8 h. Water (500 mL) was added toquench the reaction. The precipitated solid was collected on a filter anddried under reduced pressure to give 1a (8.0 g, yield 73.5percent) withoutfurther purification. MS m/z: 308.2 [M+H]+. The crude product wasdelivered directly to the next step.

Reference： [1]Patent: US2003/105107,2003,A1
[2]Patent: JP6378918,2018,B2 .Location in patent: Paragraph 0641; 0642
[3]Patent: WO2015/92431,2015,A1 .Location in patent: Page/Page column 152; 153
[4]Patent: WO2009/79597,2009,A1 .Location in patent: Page/Page column 60-61
[5]Bioorganic and Medicinal Chemistry Letters,2011,vol. 21,p. 5552 - 5556
[6]Bioorganic Chemistry,2020,vol. 94

20
[ 455-88-9 ]
[ 50741-92-9 ]

Yield	Reaction Conditions	Operation in experiment
	With sodium methylate; In diethyl ether; N,N-dimethyl-formamide;	Step 1. 3-Methyl-4-methoxynitrobenzene A solution of 2-fluoro-5-nitrotoluene (7.0 g, 45 mmol) in anhydrous DMF was added to a 28% methanolic solution of sodium methoxide (10.45 g, 54 mmol) under ice-cooling with stirring. The reaction mixture was stirred at room temperature overnight and then poured into ice water. The resulting precipitate was filtered off and dissolved in diethyl ether. This solution was washed with saturated sodium chloride solution, dried with sodium sulfate and evaporated to dryness to give the desired compound. 1H-NMR(CDCl3)delta 2,27(3H,s,CH3), 3.94(3H,s,OCH3), 6.87(1H,d,H-5), 8.03(1H,d,H-2), 8.11(1H,dd,H-6)

Reference： [1]Patent: US6541470,2003,B1

21
[ 5382-16-1 ]
[ 455-88-9 ]
[ 873537-59-8 ]

Yield	Reaction Conditions	Operation in experiment
63%	With potassium carbonate; In N,N-dimethyl-formamide; at 120℃; for 2h;	To a solution of 1.55g (10mmol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> in 35mL of N, N-dimethylformamide were added 1.01g (10mmol) of 4-hydroxypiperidine and 1.8g (13mmol) of potassium carbonate, and the mixture was stirred for 2 hours at 120°C. The reaction mixture was poured into ice and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated saline solution, and dried over with anhydrous sodium sulfate. The solvent was removed under reduced pressure and the residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate = 1/1) to give 1.5g (63percent) of the title compound.

Reference： [1]Patent: EP1775298,2007,A1 .Location in patent: Page/Page column 36

22
[ 455-88-9 ]
[ 105-56-6 ]
[ 543683-45-0 ]

Yield	Reaction Conditions	Operation in experiment
75%		A solution of ethyl-cyanoacetate (4.52 mL; 42.6 mmol) in dry DMF (15 mL) was added dropwise to a suspension of NaH (60percent dispersion in mineral oil; 1.70 g; 42.6 mmol) in dry DMF (15 mL), cooled at 0°C and under inert atmosphere. The reaction was allowed to warm slowly to room temperature and then l-fluoro-2-methyl-4-nitro- benzene (2.20 g; 14.2 mmol) was added and the stirring was maintained for additional 16 hours at the same temperature. After this period, the solvent was removed under vacuum, the residue was taken up with EtOAc and washed twice with 2N HCl .The organic phase was dried (Na2SO4), filtered and concentrated by rotary evaporator. The crude was dissolved in dioxane (10 mL), glacial acetic acid (5 mL) and 37percent HCl (2 mL) and the resulting solution was refluxed overnight. The solvent was evaporated under vacuum; the residue was dissolved in EtOAc and washed with sat. NaHCO3 and brine. The organic phase was dried over Na2SO4, filtered and evaporated to dryness. <n="134"/>Recrystallization from MeOH provided the title compound as a yellow solid (1.88 g;75 percent yield).LCMS (RT): 1.29 min (Method D); MS (ES+) gave m/z: 177.1 (MH+).
		Example 19b; (2-Methyl-4-nitro-phenyl)-acetonitrile0.83 g (13 mmol) of KOH and 1.47 g (13 mmolj of ethyl cyanoacetate in 4 ml DMSO arestirred for 1 hour and then 1.55 g (10 mmol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> are added. Thereaction mixture is stirred for 8 hours. After this time, 2.5 ml of water, 2.8 ml of acetic acidand 2.5 ml of HCI 37percent are added and the reaction mixture is stirred for 2 hours at 100°C.After this time, water is added and the suspension is extracted with ether. The combinedorganic layers are washed with brine, dried over MgSO4, filtered and evaporated in vacua.The residue is purified by flash chromatography on silica gel (hexane:ethyl acetate 10:1 to2:1) to give (2-methyl-4-nitro-phenyl)-acetonitrile as a brown solid, analytical HPLC: tR =3.92 minutes (Grad 2); ES+-MS: m/e0174.9.

Reference： [1]Patent: WO2008/117175,2008,A2 .Location in patent: Page/Page column 132-133
[2]Patent: WO2005/54237,2005,A1 .Location in patent: Page/Page column 61

23
[ 455-88-9 ]
[ 610-81-1 ]
[ 861083-83-2 ]

Yield	Reaction Conditions	Operation in experiment
87%	With caesium carbonate; In N,N-dimethyl-formamide;	Example 12; [Show Image] N6-(4,4-dimethyl-4,5-dihydrooxazol-2-yl)-N4-(3-methyl-4-(1-methyl-1H-benzo[d]imidazol-5-yloxy)phenyl)quinazoline-4,6-diamine Step A: Preparation of 4-(2-methyl-4-nitrophenoxy)-2-nitrobenzenamine: To a solution of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (2.02 g, 13.0 mmol) and 4-amino-3-nitrophenol (2.22 g, 14.4 mmol) in DMF (20 mL) was added cesium carbonate (5.28 g, 16.2 mmol). After heating to 60 °C for 10 hours, the mixture was diluted with water (100 mL) and filtered. The precipitate was washed with water and air-dried to provide the product (3.28 g, 87percent) as dark solid.

Reference： [1]Patent: EP2090575,2009,A1 .Location in patent: Page/Page column 56

24
[ 23997-94-6 ]
[ 455-88-9 ]
[ 937263-24-6 ]

Yield	Reaction Conditions	Operation in experiment
	With potassium carbonate; In N,N-dimethyl-formamide; at 50℃; for 16h;	Step F: Preparation of 2-methyl-5-(2-methyl-4-nitrophenoxy)benzo[d]oxazole: 2-Methylbenzo[d]oxazol-5-ol (0.86 g, 5.77 mmol) , 1-fluoro-2-methyl-4-nitrobenzene (0.98 g, 6.34 mmol) and K2CO3 (1.59 g, 11.53 mmol) were combined in DMF and heated to 50 C for 16 hours. The reaction mixture was cooled to room temperature and poured into ice water. The mixture was extracted with ethyl acetate (3 X). The combined organics were washed with brine, dried, and concentrated under reduced pressure. The residue was chromatographed (20% to 40% ethyl acetate in hexanes) to provide the product (0.671 g, 41%) as yellow solid.

Reference： [1]Patent: EP2090575,2009,A1 .Location in patent: Page/Page column 50

25
[ 455-88-9 ]
1-benzo[d]oxazol-5-ol [ No CAS ]
[ 937263-65-5 ]

Yield	Reaction Conditions	Operation in experiment
56%	With potassium carbonate; caesium carbonate; In N,N-dimethyl-formamide; at 50℃; for 16h;	Step C: Preparation of 5-(2-methyl-4-nitrophenoxy)benzo[d]oxazole: To a solution of benzo[d]oxazol-5-ol (1.50 g, 11.10 mmol) and <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (1.89 g, 12.21 mmol) in DMF was added cesium carbonate (1.81 g, 5.55 mmol) and potassium carbonate (2.30 g, 16.65 mmol). After heating to 50 °C for 16 hours, the mixture was poured into ice water and extracted with ethyl acetate (3 X). The combined organics were washed with brine, dried, and concentrated under reduced pressure. The residue was chromatographed (30percent ethyl acetate in hexanes) to provide the product (1.69 g, 56percent) as white solid.

Reference： [1]Patent: EP2090575,2009,A1 .Location in patent: Page/Page column 62

26
[ 455-88-9 ]
[ 114086-15-6 ]
[ 1182190-24-4 ]

Yield	Reaction Conditions	Operation in experiment
79%	With potassium carbonate; In 1-methyl-pyrrolidin-2-one; at 110℃; for 14.0h;Product distribution / selectivity;	(1 S,4S)-2-Methyl-2,5-diazabicyclo[2.2.1]heptane-2HBr (6 g, 21.89 mmol) (which can be prepared by similar methods as described in Braish, T. F et al., J. Org. Chem. (1990), Vol. 55, pp. 1684-1687), 2-fluoro-5-nitrotoluene (2.61 g, 16.82 mmol) and K2CO3 (10.57 g, 76.46 mmol) in 30 mL NMP were heated at 110 0C for 14 h while stirring. The reaction mixture was cooled to ambient temperature, poured onto ice-water and stirred until precipitate formation. The yellow solid formed was collected by filtration and washed with 15%EtOAc/hexanes to provide 2-[(1 S,4S)-5-methyl-2,5- diazabicyclo[2.2.1]heptan-2-yl]-5-nitrotoluene (3.4 g, 79%) in 98% purity; 1H NMR (DMSO-d6): delta 7.88-7.55 (m, 2H), 6.69 (d, 1 H, J = 8.8 Hz), 4.37 (s, 1 H), 3.64 (dd, 1 H, J = 2.0 and 9.9 Hz), 3.38-3.55 (m, 2H), 2.81 (d, 1 H, J = 9.9 Hz), 2.65 (d, 1 H, J = 9.9 Hz), 2.33 (s, 3H), 2.23 (s, 3H), 1.87 (d, 1 H, J = 9.3 Hz), 1.75 (d, 1 H, J = 9.3 Hz); LCMS: purity: 98%; MS (m/e): 248 (MH+).

Reference： [1]Patent: WO2009/103032,2009,A1 .Location in patent: Page/Page column 172

27
[ 1121-78-4 ]
[ 455-88-9 ]
[ 697299-78-8 ]

Yield	Reaction Conditions	Operation in experiment
98%		Sodium hydride (25.6 g, 60percent dispersion in oil, 0.64 mol) was added portionwise to a solution of 5-hydroxy-2-methylpyridine (70 g, 0.64 mol) in DMA (700 ml) while keeping the temperature below 40°C. At the end of the addition, the mixture was stirred at room temperature for 1 hour and <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (91.3 g, 0. 59 mol) in DMA (100 ml) was added slowly. The mixture was stirred at 80°C for 3 hours and then cooled. The solvents were evaporated under vacuum and the residue was partitioned between ethyl acetate and water. The organic layer was washed with water and brine and then dried over MGS04. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 30percent ethyl acetate in petroleum ether) to give 2-methyl-5- (2-methyl-4-nitrophenoxy) pyridine (141 g, 98percent) as an oil; NMR spectrum (CDC13) ; 2.43 (s, 3H), 2.59 (s, 3H), 6.74 (d, 1H), 7.21 (d, 1H), 7.27 (d, 1H), 8.00 (d, 1H), 8.17 (s, 1H), 8.32 (s, 1H).
98%		Example 51; 2-1[4-(13-Methyl-4-[(6-methylpyridin-3-yl)oxyjphenyllamino)quinazolin-5- yl] oxy} acetamide; A mixture of 1[4-({3-methyl-4-[(6-methylpyridin-3- yl)oxy]phenyl} amino)quinazolin-5-yl]oxy} acetic acid (120 mg, 0.27 mmol), diisopropylethylamine (72 mul, 0.4 mmol) and HATU (155 mg, 0.41 mmol) was stirred at 50 °C for 18 hours. After cooling, gaseous ammonia was bubbled through the mixture for 15 minutes. After evaporation of the solvents in vacuo, the residue was triturated with water. The pH of the solution was adjusted to 8 by addition of 5percent aqueous sodium bicarbonate solution. The resultant beige precipitate was filtered, washed with water and ether and dried over P205 under high vacuum. The precipitate was stirred in ethyl acetate for 1 hour, filtered and dried under high vacuum at 50 °C to give the title compound as a beige solid (140 mg, 78percent); NMR spectrum: (400 MHz; DMSO-d6 + CF3C02D) 2.29 (s, 3H), 2.71 (s, 3H), 5.01 (s, 2H), 7.24 (d, 1H), 7.30 (d, 1H), 7.48 (d, 1H), 7.86 (m, 1H), 7.93 (m, 2H), 8.09 (m, 2H), 8.74 (s, 1H), 8.96 (s, 1H); Mass spectrum: MH+ 416; The [4-({3-methyl-4-[(6-methylpyridin-3-yl)oxy]phenyl}amino)quinazolin-5- yl] oxy}acetic acid used as starting material was obtained as follows: Sodium hydride (25.6 g, 60percent dispersion in oil, 0.64 mol) was added portionwise to a solution of 5-hydroxy-2-methylpyridine (70 g, 0.64 mol) in DMA (700 ml) while keeping the temperature below 40 °C. At the end of the addition, the mixture was stirred at room temperature for 1 hour and <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (91.3 g, 0.59 mol) in DMA (100 ml) was added slowly. The mixture was stirred at 80 °C for 3 hours, then cooled. The solvents were removed in vacuo and the residue was partitioned between ethyl acetate and water. The organic layer was washed with water and brine and dried over MgS04. After evaporation of the solvents, the residue was purified by chromatography on silica gel eluting with 30percent ethyl acetate in petroleum ether to give 2-methyl-5-(2-methyl-4- nitrophenoxy) pyridine as an oil (141 g, 98percent) ; NMR spectrum: (400 MHz; CDC13) 2.43 (s, 3H), 2.59 (s, 3H), 6.74 (d, 1H), 7.21 (d, 1H), 7.27 (d, 1H), 8.00 (d, 1H), 8.17 (s, 1H), 8.32 (s, 1H); A mixture of 2-methyl-5-(2-methyl-4-nitrophenoxy)pyridine (141 g, 0.58 mol) and 10percent palladium on charcoal (13 g) in ethyl acetate (200 ml) and ethanol (700 ml) was stirred under an atmosphere of hydrogen (1.2 bar) for 5 hours. The mixture was then purged with nitrogen and the catalyst was filtered off. The filtrate was evaporated to dryness to give 3-methyl-4-[(6-methylpyridin-3-yl)oxy]aniline as a white solid (120.6 g, 98percent) ; Mass spectrum: MH+ 215. 3-Methyl-4-[(6-methylpyridin-3-yl)oxy]aniline (6.42 g, 30 mmol) and 4N hydrogen chloride in dioxane (7.55 ml, 30 mmol) were added to a suspension of 4-chloro-5- fluoroquinazoline (obtained as described in Example 1, preparation of starting materials, 5 g, 27.5 mmol) in acetonitrile (100 ml). The mixture was stirred at 80 °C for 2 hours. After cooling, the precipitate was washed with acetonitrile. This precipitate was partitioned between DCM and 5percent aqueous sodium bicarbonate solution and the pH was adjusted to 8. The organic layer was washed with brine and dried over MgS04. Evaporation of the solvents gave 5-fluoro-N {3-methyl-4-[(6-methylpyridin-3-yl)oxy]phenyl] quinazolin-4- amine as a dark gum (9.3 g, 94percent) which crystallised on standing; NMR spectrum: (400 MHz; CDCl3) 2.30 (s, 3H), 2.54 (s, 3H), 6.93 (d, 1H), 7.15-7.08 (m, 2H), 7.22 (m, 1H), 7.56 (d, 1H), 7.63 (s, 1H), 7.71 (m, 2H), 8.27 (s, 1H), 8.37 (d, 1H), 8.71 (s, 1H); A mixture of 5-fluoro-N- {3-methyl-4-[(6-methylpyridin-3- yl)oxy]phenyl}quinazolin-4-amine (10.8 g, 30 mmol) and sodium methoxide (4.86 g, 90 mmol) in methanol (250 ml) was heated at reflux for 16 hours. After cooling and evaporation of the solvents, the residue was dissolved in dichloromethane. This solution was washed with water and brine and dried over MgS04. Evaporation of the solvents gave 5-methoxy-N- {3-methyl-4-[(6-methylpyridin-3-yl)oxy]phenyl}quinazolin-4-amine as a white solid (10.7 g, 96percent) ; NMR spectrum: (400 MHz; CDC13) 2.29 (s, 3H), 2.53 (s, 3H), 4.12 (s, 3H), 6.92 (m, 2H), 7.12 (m, 2H), 7.48 (d, 1H), 7.55 (d, 1H), 7.63 (m, 2H), 8.27 (s, 1H), 8.64 (s, 1H), 9.78 (bs, 1H); A mixture of 5-methoxy-N-{3-methyl-4-[(6-methylpyridin-3- yl)oxy]phenyl}quinazolin-4-amine (10.04 g, 27 mmol) and pyridine hydrochloride (12.42 g, 108 mmol) in pyridine (100 ml) was heated at reflux for 2 hours. After cooling and evaporation of the solvents, the residue was triturated in 5percent aqueous sodium bicarbonate and the resulting mixture was stirred for 30 minutes. The yellowish precipitate was filtered, washed with water and ether, and dried over P205 under high vacuum to give 5- hydroxy-N- {3-methyl-4-[(6-methylpyridin-3-yl)oxy]phenyl}quinazolin-4-amine (9.3 g, 96percent) ; NMR spectrum: (400 MHz) 2.20 (s, 3H), 2.44 (s, 3H), 6.71 (m, ...
98%		Sodium hydride (25.6 g, 60percent dispersion in oil, 0.64 mol) was added portion-wise to a solution of 5-hydroxy-2-methylpyridine (70 g, 0.64 mol) in DMA (700 ml) while keeping the temperature below 40°C. At the end of the addition, the mixture was stirred at room temperature for 1 hour and <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (91.3 g, 0.59 mol) in DMA (100 ml) was added slowly. The mixture was stirred at 80°C for 3 hours and then cooled. The solvents were evaporated under vacuum and the residue was partitioned between ethyl acetate and water. The organic layer was washed with water and brine and dried over MgSO4. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 30percent ethyl acetate in petroleum ether) to give 2-methyl-5-(2-methyl-4-nitrophenoxy)pyridine as an oil (141 g, 98percent); NMR spectrum (CDCl3): 2.43 (s, 3H), 2.59 (s, 3H), 6.74 (d, IH), 7.21 (d, IH), 7.27 (d, IH), 8.00 (d, IH), 8.17 (s, IH), 8.32 (s, IH).

94%		To a DMF suspension (60 mL) of sodium hydride (1.39 g, 60percent in mineral oil) was slowly added a DMF solution (40 mL) of 5-HYDROXY-2-METHYLPYRIDINE (3.80 g, 34.8 MMOL) dropwise, keeping the temp < 5 °C. The ice bath was removed, and the contents allowed to warm with stirring for 60 min. To the light yellow colored contents was added a DMF SOLUTION OF 2-FLUORO-5-NITROTOLUENE (4.50 g, 29.0 MMOL) dropwise, and the contents heated to 95°C, overnight. The dark brown contents were removed from heating, and allowed to cool to rt with stirring. The mixture was quenched with water (5 mL), and concentrated in vacuo. The residue was diluted with water (100 mL) and EtOAc (75 mL). The layers were separated, and the aq. layer extracted with EtOAc (2 x 75 mL). The combined organic layers were washed with brine (2X50 mL), dried over MGS04, filtered and concentrated in vacuo to collect the 2-Methyl-5- (2-methyl-4-nitro-phenoxy)-pyridine as a yellow oil (7.0 g, 94percent). The solution of 2-Methyl-5- (2-methyl-4-nitro-phenoxy)-pyridine (6.4 g, 26.2 MMOL), 10WTpercent Pd/C (0.50 g) in ethanol (100 mL) was stirred under 1 atm hydrogen at rt for 24 h. Then the Pd/C catalyst was removed by filtration through a layer of celite. Removal of the solvent gave the desired product as an off-white solid (5.55g, 99percent).'H-NMR (DMSO-d6) 8 8. 04 (d, J = 2. 7 HZ, 1 H), 7.13 (d, J = 5. 4 HZ, 1 H), 7.02 (dd, J = 8.7, 3.1 Hz, 1H), 6.68 (d, J = 8.7 Hz, 1 H), 6.49 (d, J = 2.6 Hz, 1 H), 6.42 (DD, J = 8.4, 2.8 Hz, 1 H), 4.96 (br, 2H), 2.39 (s, 3H), 1.97 (s, 3H). LCMS RT = 1.04 min; [M+H] + = 215.2.
80%	With caesium carbonate; In N,N-dimethyl-formamide; at 110℃; for 4h;	A mixture of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (1 g, 6.4 mmol), 6-methylpyridin-3-ol (0.77 g, 7.09 mmol), CS2CO3 (2.5 g, 7.7 mmol) and N-N-dimethylformamide (10 mL) was heated to 110° C. for 4 hours. The reaction mixture was cooled to room temperature and then quenched with water, extracted with ethyl acetate (3*200 mL). The combined organic layers were dried over anhydrous Na2SO4, filtered, concentrated and dried under vacuum to give 1.2 g (80percent). 1H NMR 400 MHz (DMSO-d6): delta 8.33 (d, J=3.2 Hz, 1H), 8.25 (d, J=2.4 Hz, 1H), 8.06 (m, 1H), 7.52 (m, 1H), 7.33 (m, 1H), 6.86 (d, J=9.2 Hz, 1H) 2.50 (s, 3H), 2.39 (s, 3H); MS (ES) m/e 245 [M+1]+.

Reference： [1]Patent: WO2005/26151,2005,A1 .Location in patent: Page/Page column 141
[2]Patent: WO2005/118572,2005,A1 .Location in patent: Page/Page column 167-170
[3]Patent: WO2006/64196,2006,A1 .Location in patent: Page/Page column 100
[4]Patent: WO2005/10008,2005,A1 .Location in patent: Page/Page column 119-120
[5]Patent: US2018/208584,2018,A1 .Location in patent: Paragraph 0352; 0353

28
[ 78242-20-3 ]
[ 455-88-9 ]
[ 871020-84-7 ]

Yield	Reaction Conditions	Operation in experiment
89%		Example 163; N-(3-methyl-4- [(1-methyl-lH-pyrazol-4-yl)oxy]phenyl)-5- [(lR)-I -methyl-2- morpholin-4-yl-2-oxoethoxy] quinazolin-4-amine; The procedure described in Example 138 was repeated using 3-methyl-4-[(1- methyl-1H-pyrazol-4-yl) oxy]aniline to give the title compound (338 mg; 84percent); NMR Spectrum: (400 MHz; ) 1.56 (d, 3H), 2.28 (s, 3H), 3.43-3.71 (m, 8H), 3.79 (s, 3H), 5.86 (m, 1H), 6.91 (d, 1H), 7.26 (d, 1H), 7.31 (s, 1H), 7.33 (d, 1H), 7.62 (s, 1H), 7.71-7.77 (m, 2H), 7.90 (d, 1H), 8.48 (s, 1H); Mass spectrum: MH+ 489; The 3-methyl-4-[(1-methyl-1H pyrazol-4-yl)oxy]aniline used as starting material was made as follows: A solution of lithium bis(trimethylsilyl)amide (1M in hexane, 16.6 ml) was added dropwise to a solution of 4-t-butyldimethylsilyloxypyrazole (3.0 g, 15.1 mmol, described in Crowell, T. A. et al, PCT Int. Appl. , 1999, WO 9929672, preparation 3 p30) in THF (65 ml) at room temperature. After 45 miutes, iodomethane (1.13 ml, 18.2 mmol) was added and the reaction mixture was heated at 40°C for 3 hours. The mixture was then cooled down, neutralized with saturated ammonium chloride and extracted with ethyl acetate. After evaporation, the residue was dissolved in THF, then tetrabutylammonium fluoride (1 M in THF, 18.9 ml) and acetic acid (2.16 ml) were added and the solution stirred for 1 hour. Saturated ammonium chloride was added and the mixture extracted with ethyl acetate. Evaporation of the solvent and purification of the residue on silica gel (2 to 5percent methanol in a 1:1 mixture of ethyl acetate and DCM) provided 1-methyl-4-hydroxy-1H- pyrazole (1.28 g, 86percent) ; Mass spectrum: MH+ 99; Sodium hydride (60percent, 428 mg, 10.7 mmol) was added portionwise to 1-methyl-4- hydroxy-1H-pyrazole (996 mg, 10.1 mmol) in DMA (10 ml). After 15 minutes, 2-fluoro- 5-nitrotoluene (1.58 g, 10.2 mmol) was added and the mixture was stirred at room temperature for 2 hours. The mixture was partitioned between water and ethyl acetate and the organic phase was dried, evaporated, and the residue purified on silica gel (40 to 70percent ethyl acetate in petroleum ether) to give 1-methyl-4-(2-methyl-4-nitrophenoxy)-1H- pyrazole as a solid (2.11 g, 89percent) ; Mass spectrum: MH+ 234; 1-methyl-4-(2-methyl-4-nitrophenoxy)-1H-pyrazole (2.23 g) was converted into 3- methyl-4-[(1-methyl-1H-pyrazol-4-yl)oxy]aniline as described in Example 51 starting material, except that hydrogenation was performed in ethanol with platinum oxide as a catalyst; Yield: 1.62 g, 91percent; NMR Spectrum: (400 MHz) 2.08 (s, 3H), 3.72 (s, 3H), 4.78 (s, 2H), 6.35 (dd, 1H), 6.43 (d, 1H), 6.66 (d, 1H), 7.12 (s, 1H), 7.36 (s, 1H).

Reference： [1]Patent: WO2005/118572,2005,A1 .Location in patent: Page/Page column 225-226

29
[ 13466-43-8 ]
[ 455-88-9 ]
[ 1093183-33-5 ]

Yield	Reaction Conditions	Operation in experiment
80%		Example 12A3-Bromo-1-(2-methyl-4-nitrophenyl)pyridin-2(1H)-one 44.5 g (280 mmol) of 3-bromopyridin-2(1H)-one are dissolved in 750 ml of anhydrous dimethyl sulphoxide, and 33.4 g (298 mmol) of potassium tert-butoxide are added a little at a time at room temperature. The suspension is stirred at this temperature for 1 h, 38.5 g (280 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are then added and the reaction solution is heated at 80 C. for 20 h. The solution is allowed to cool and carefully diluted with water. The resulting crystalline precipitate is filtered off, washed with a little water and dried under reduced pressure. This gives 62 g (80% of theory) of the desired product.1H-NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.34 (d, 1H), 8.21 (dd, 1H), 8.10 (dd, 1H), 7.71-7.63 (m, 2H), 6.36 (t, 1H), 2.17 (s, 3H).LC-MS (method 3): Rt=1.72 minMS (ESIpos): m/z=309 (M+H)+
80%		44.5 g (280 mmol) of 3-bromopyridin-2(1H)-one are dissolved in 750 ml of anhydrous dimethyl sulfoxide and admixed at room temperature with 33.4 g (298 mmol) of potassium tert-butoxide in portions. The suspension is stirred at this temperature for 1 h, before 38.5 g (280 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are added and the reaction solution is heated to 80 C. for 20 h. It is allowed to cool and diluted cautiously with water. The precipitated crystalline solid is filtered off, washed with a little water and dried under reduced pressure. This affords 62 g (80% of theory) of the desired product. 1H NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.34 (d, 1H), 8.21 (dd, 1H), 8.10 (dd, 1H), 7.71-7.63 (m, 2H), 6.36 (t, 1H), 2.17 (s, 3H). LC-MS (Method 3): Rt=1.72 min MS (ESIpos): m/z=309 (M+H)+
80%	With potassium phosphate; In 1-methyl-pyrrolidin-2-one; at 120℃; for 4h;	Example 2 Preparation of 3-bromo-1-(2-methyl-4-nitrophenyl)pyridin-2(1H)-one A suspension of 125 g (718 mmol) of 3-bromopyridone, 106 g (682 mmol) of <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> and 183 g (862 mmol) of anhydrous tripotassium phosphate in 325 ml of NMP was heated at 120 C. for 4 h. At 90 C., 1250 ml of water were added and the mixture was cooled to 20 C. with stirring. After-stirring was carried out for 16 h, followed by isolation via a suction filter. Washing was carried out twice with in each case 500 ml of water and twice in each case with 500 ml of 1:1 water/methanol. Finally, in vacuo at 40 C., drying to constant weight was carried out. This gave 178 g (80%) of the desired product. The purity of the product can be increased further to ?99 area % by recrystallization e.g. from dioxane or acetonitrile.[0082] HPLC (method 1): Rt=13.9 min with 97 area %. [0083] 1H NMR (500 MHz, DMSO-d6): delta [ppm]=2.17 (s, 3H), 6.37 (t, 1H), 7.65 (d, 1H), 7.69 (dd, 1H), 8.10 (dd, 1H), 8.21 (dd, 1H), 8.34 (d, 1H). [0084] MS (DCI-NH3): [M+H]+ 309

With potassium tert-butylate; In dimethyl sulfoxide;

Example 22A 3-Bromo-1-(2-methyl-4-nitrophenyl)pyridin-2(1H)-one 44.5 g (280 mmol) of 3-bromopyridin-2(1H)-one are dissolved in 750 ml of anhydrous dimethyl sulphoxide, and 33.4 g (298 mmol) of potassium tert-butoxide are added a little at a time at room temperature. The suspension is stirred at this temperature for 1 h, 38.5 g (280 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are then added and the reaction solution is heated at 80 C. for 20 h. The solution is allowed to cool and carefully diluted with water. The resulting crystalline precipitate is filtered off, washed with a little water and dried under reduced pressure. This gives 62 g (80% of theory) of the desired product. 1H-NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.34 (d, 1H), 8.21 (dd, 1H), 8.10 (dd, 1H), 7.71-7.63 (m, 2H), 6.36 (t, 1H), 2.17 (s, 3H). LC-MS (method 3): Rt=1.72 min MS (ESIpos): m/z=309 (M+H)+

Reference： [1]Patent: US2010/184740,2010,A1 .Location in patent: Page/Page column 26
[2]Patent: US2010/298293,2010,A1 .Location in patent: Page/Page column 27
[3]Patent: US2013/116443,2013,A1 .Location in patent: Paragraph 0080; 0081; 0082; 0083; 0084
[4]Patent: US2010/261759,2010,A1

30
[ 20928-63-6 ]
[ 455-88-9 ]
[ 1093417-39-0 ]

Yield	Reaction Conditions	Operation in experiment
72%		Example 39A3-Methoxy-1-(2-methyl-4-nitrophenyl)pyridin-2(1H)-one 28.5 g (228 mol) of 3-methoxypyridin-2(1H)-one are dissolved in 850 ml of dimethyl sulphoxide, and 31 g (273 mmol) of potassium tert-butoxide are added at RT. The suspension is stirred at RT for 30 min, and 35 g (228 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are then added, and the reaction solution is heated at 80° C. for 20 h. The solution is then carefully diluted with 1 l of water and adjusted to pH 1-2 using 1N hydrochloric acid. The solution is extracted repeatedly with dichloromethane. The combined organic extracts are washed with water and saturated sodium chloride solution, dried over sodium sulphate, filtered and evaporated under reduced pressure. The solid obtained is washed with a little tert-butyl methyl ether, filtered off and dried under reduced pressure. This gives 42.8 g (72percent of theory) of the desired compound.1H-NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.35 (d, 1H), 8.18 (dd, 1H), 7.57 (d, 1H), 7.13 (dd, 1H), 6.95 (dd, 1H), 6.32 (t, 1H), 3.75 (s, 3H), 2.25 (s, 3H).LC-MS (method 3): Rt=1.45 minMS (ESIpos): m/z=261 (M+H)+
72%		28.5 g (228 mol) of 3-methoxypyridin-2(1H)-one are dissolved in 850 ml of dimethyl sulfoxide and admixed at RT with 31 g (273 mmol) of potassium tert-butoxide. The suspension is stirred at RT for 30 min, before 35 g (228 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are added, and the reaction solution is heated to 80° C. for 20 h. The mixture is then cautiously diluted with 1 l of water and brought to pH 1-2 with 1N hydrochloric acid. The solution is extracted repeatedly with dichloromethane. The combined organic extracts are washed with water and saturated sodium chloride solution, dried over sodium sulfate, filtered and concentrated under reduced pressure. The resulting solid is washed with a little tert-butyl methyl ether, filtered off and dried under reduced pressure. This affords 42.8 g (72percent of theory) of the desired compound. 1H NMR (400 MHz, DMSO-d6, delta/ppm): delta=8.35 (d, 1H), 8.18 (dd, 1H), 7.57 (d, 1H), 7.13 (d, 1H), 6.95 (dd, 1H), 6.32 (t, 1H), 3.75 (s, 3H), 2.25 (s, 3H). LC-MS (Method 3): Rt=1.45 min MS (ESIpos): m/z=261 (M+H)+

Reference： [1]Patent: US2010/184740,2010,A1 .Location in patent: Page/Page column 34-35
[2]Patent: US2010/298293,2010,A1 .Location in patent: Page/Page column 19

31
[ 67-56-1 ]
[ 455-88-9 ]
[ 50741-92-9 ]

Reference： [1]Synthetic Communications,2010,vol. 40,p. 2122 - 2129

32
[ 455-88-9 ]
[ 100-46-9 ]
[ 201157-13-3 ]

Yield	Reaction Conditions	Operation in experiment
80%		Benzylamine (1.61 g, 15.00 mmol), potassium carbonate (4.14 g, 30.00 mmol) and N,N-dimethylformamide(50 mL) was added to a 100 mL single-mouth bottle and heated to 65 ° C for 2 hours. Slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (2.79g,A solution of 18.00 mmol of N,N-dimethylformamide (20 mL) was stirred for 10 h. Cool to room temperature and pour the mixture toStir in ice water (100 mL) for 30 minutes, solid precipitated, filtered, and the filter cake was washed with water (100 mL x 3) to give the title compound(yellow solid 2.90 g, yield: 80percent).

Reference： [1]Journal of Heterocyclic Chemistry,2010,vol. 47,p. 1176 - 1182
[2]Patent: CN108690043,2018,A .Location in patent: Paragraph 0250; 0252-0253

33
[ 100-72-1 ]
[ 455-88-9 ]
[ 940009-04-1 ]

Yield	Reaction Conditions	Operation in experiment
74%		The 3-methyl-4-(tetrahydro-2H-pyran-2-ylmethoxy)aniline used as starting material was made as follows: Potassium tert-butoxide (19.4 ml, 19.4 mmol, IM solution in THF) was added to a solution of tetrahydro-2H-pyran-2-ylmethanol (2.25 g, 19.4 mmol) in TetaF (20 ml). The mixture was stirred at room temperature for 40 minutes. The resulting mixture was added drop-wise to a solution of <strong>[455-88-9]4-fluoro-3-methylnitrobenzene</strong> (3 g, 19.3 mmol) in TetaF (20 ml) at room temperature. The mixture was stirred at room temperature for 3 hours. After evaporation of the solvent, the residue was partitioned between saturated aqueous ammonium chloride and ethyl acetate. The mixture was extracted with ethyl acetate. The organic layers were combined, washed with water and brine and dried over MgSO4. After evaporation of the solvents, the residue was purified by chromatography on silica gel (eluant: 5 to 20percent ethyl acetate in petroleum ether) to give 2-[(2-methyl-4-nitrophenoxy)methyl]tetrahydro-2eta-pyran as an oil (3.6 g, 74percent); NMR Spectrum 1.6-1.3 (m, 4H), 1.68 (m, IH), 1.82 (m, IH), 2.24 (s, 3H), 3.41 (m, IH), 3.68 (m, IH), 3.90 (m, IH), 4.09 (m, 2H), 7.16 (d, IH), 8.10 (m, 2H).

Reference： [1]Patent: WO2007/63291,2007,A1 .Location in patent: Page/Page column 72

34
[ 109-11-5 ]
[ 455-88-9 ]
[ 845729-40-0 ]

Yield	Reaction Conditions	Operation in experiment
51%		(b) 3-methyl-1-nitro-4-(3-oxo-morpholin-4-yl)-benzene 1.00 g (6.45 mmol) 4-fluoro-3-methyl-1-nitro-benzene is combined in 20 ml DMF with 281 mg (6.45 mmol) 55percent sodium hydride, dispersed in paraffin, stirred for 5 min at ambient temperature. Then 815 mg (8.06 mmol) morpholin-3-one were added and then stirred for 2 h at ambient temperature. Then the mixture is evaporated down i. vac., water is added to the residue and it is extracted with ethyl acetate. The combined organic phases are washed with sat. sodium chloride solution, dried on sodium sulphate, evaporated down i. vac. and the residue is purified by chromatography on silica gel (eluant gradient: cyclohexane/ethyl acetate=1:1-->0:1). Yield: 780 mg (51percent) Rf value: 0.52 (silica gel, ethyl acetate) C11H12N2O4 (236.22) Mass spectrum: (M+H)+=237

Reference： [1]Patent: US2008/51578,2008,A1 .Location in patent: Page/Page column 31

35
[ 455-88-9 ]
[ 22245-83-6 ]
[ 1093655-92-5 ]

Yield	Reaction Conditions	Operation in experiment
41%		2.5 g (15.3 mmol) of 3-(trifluoromethyl)pyridin-2(1H)-one are dissolved in 40 ml of dimethyl sulfoxide and admixed at room temperature with 2.58 g (22.9 mmol) of potassium tert-butoxide. The suspension is stirred at room temperature for 30 min, before 2.6 g (16.9 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are added and the reaction solution is heated to 80° C. for 20 h. It is diluted cautiously with water. The solution is extracted repeatedly with dichloromethane. The combined organic extracts are washed with water and saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is dissolved in acetonitrile and purified by preparative HPLC with a gradient of water and acetonitrile. The product fractions are combined and concentrated to dryness under reduced pressure. This affords 1.87 g (41percent of theory) of the desired product. 1H NMR (400 MHz, DMSO-d6, delta/ppm): 8.4 (d, 1H), 8.2 (dd, 1H), 8.15 (d, 1H), 8.0 (dd, 1H), 7.7 (d, 1H), 6.55 (t, 1H), 2.2 (s, 3H). LC-MS (Method 6): Rt=2.26 min MS (ESIpos): m/z=488 (M+H)+

Reference： [1]Patent: US2010/298293,2010,A1 .Location in patent: Page/Page column 26; 27

36
[ 455-88-9 ]
[ 1093656-66-6 ]
[ 1093656-70-2 ]

Yield	Reaction Conditions	Operation in experiment
72%		300 mg (2.14 mmol) of example 112A are dissolved in 7 ml of dimethyl sulfoxide and admixed at room temperature with 288 mg (2.6 mmol) of potassium tert-butoxide. The suspension is stirred at room temperature for 30 min, before 332 mg (2.14 mmol) of <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> are added and the reaction solution is heated to 80° C. for 20 h. It is diluted cautiously with water. The solution is extracted repeatedly with dichloromethane. The combined organic extracts are washed with water and saturated sodium chloride solution, dried over magnesium sulfate, filtered and concentrated under reduced pressure. The residue is crystallized from methanol and tert-butyl methyl ether. This affords 429 mg (72percent of theory) of the desired compound. 1H NMR (400 MHz, CDCl3, delta/ppm): delta=8.25 (d, 1H), 8.2 (dd, 1H), 7.4 (d, 1H), 6.95 (d, 1H), 6.65 (d, 1H), 4.5 (m, 2H), 2.25 (s, 3H), 1.5 (t, 3H). LC-MS (Method 5): Rt=1.90 min MS (ESIpos): m/z=276 (M+H)+

Reference： [1]Patent: US2010/298293,2010,A1 .Location in patent: Page/Page column 47

37
[ 576-26-1 ]
[ 455-88-9 ]
[ 1238688-70-4 ]

Yield	Reaction Conditions	Operation in experiment
92%	With potassium carbonate; In N,N-dimethyl-formamide; at 100℃; for 2h;	Step A: Preparation of 4-(2,6-dimethyl-phenoxy)-3-methyl-nitrobenzene. A solution of 2,6-dimethylphenol (0.87 g, 7.1 mmol), potassium carbonate (0.98 g, 7.1 mmol), <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (1.0 g, 6.4 mmol) and DMF (20 mL) was stirred at 100° C. for 2 h. The reaction mixture was diluted with 100 mL water and extracted with 250 mL EtOAc. The organic layer was washed with brine, dried with sodium sulfate and concentrated to provide the crude titled compound (1.5 g, 92percent). This material was used without purification: MS (ESI): mass calcd. for C15H15NO3, 257.3; m/z found, 258.1 [M+H]+. 1H NMR (400 MHz, CDCl3): 8.16 (dd, J=2.8, 0.7 Hz, 1H), 7.92 (dd, J=9.1, 2.7 Hz, 1H), 7.18-7.07 (m, 3H), 6.33 (d, J=9.0 Hz, 1H), 2.50 (s, 3H), 2.09 (s, 6H).

Reference： [1]Patent: US2010/204226,2010,A1 .Location in patent: Page/Page column 28

38
[ 109-01-3 ]
[ 455-88-9 ]
[ 681004-49-9 ]

Yield	Reaction Conditions	Operation in experiment
99%	Microwave irradiation; Reflux;	l-Methyl-4-(2-methyl-4-nitrophenyl)piperazine (SG4-035): 2-Fluoro-5-nitrotoluene (1.00 g, 6.45 mmol) and 1 -methylpiperazine (2.15 mL, 19.34 mmol) placed in a 5 mL microwave vial then stirred and heated at reflux. Water (10 mL) was added and the precipitates were filtered, washed with water (3 x 5 mL), and air-dried to provide the title compound as a yellow solid (1.518 g, 99percent). NMR (400 MHz, CDCb) delta: 8.07-8.00 (m, 2H), 7.00 (d, J= 9.1 Hz, 1H), 3.12-3.04 (m, 4H), 2.63 (brs, 4H), 2.40 (s, 3H), 2.36 (s, 3H). HPLC-MS (ESI+): m/z 236.2 [100percent, (M+H)+].
99%	Reflux;	2-Fluoro-5-nitrotoluene (1.00 g, 6.45 mmol) and 1-methylpiperazine (2.15 mL, 19.34 mmol) placed in a 5 mL microwave vial then stirred and heated at reflux. Water (10 mL) was added and the precipitates were filtered, washed with water (3 x 5 mL), and air-dried to provide the title compound as a yellow solid (1.518 g, 99percent). NMR (400 MHz, CDC ) delta: 8.07-8.00 (m, 2H), 7.00 (d, / = 9.1 Hz, 1H), 3.12-3.04 (m, 4H), 2.63 (brs, 4H), 2.40 (s, 3H), 2.36 (s, 3H). HPLC-MS (ESI+): m/z 236.2 [100percent, (M+H)+].
77%	With potassium carbonate; In dimethyl sulfoxide; at 100℃; for 4h;	A mixture of <strong>[455-88-9]1-fluoro-2-methyl-4-nitro-benzene</strong> (3.22mmol), 1-methylpiperazine (3.63mmol) and potassium carbonate (3.83mmol) in dimethyl sulfoxide (4ml) were stirred and heated to 100°C for 4h. The resultant reaction solution was cooled down to room temperature, added water (50ml) to the reaction mixture, filtered off the solid residue, washed with water (50ml), and air-dried to give the desired product of 1-methyl-4-(2-methyl-4-nitrophenyl-piperazine (2a)) as a brown solid, 77percent yield. 1H NMR (500MHz, Chloroform-d) delta 8.04 (d, J=8.3Hz, 2H), 7.01 (d, J=8.4Hz, 1H), 3.07 (t, J=4.8Hz, 4H), 2.67?2.57 (m, 4H), 2.39 (s, 3H), 2.37 (s, 3H). [M+H]+, ESI m/z 236.29. MW: 235.28g/mol.

45%

With potassium carbonate; In N,N-dimethyl-formamide; at 20℃;

Step: 3A-lSynthesis of l-Methyl-4-(2-methyl-4-nitro-phenyl)-piperazine.Procedure:K2C03 (1.77g, 0.0128mol), 1-Methyl-piperazine (0.85ml, 0.0077mol) were added to a stirred solution of l-Fluoro-2-methyl-4-nitro-benzene (lg, 0.0064mol) in DMF and stirred at RT overnight. The reaction was monitored by the TLC (20percent EtOAc: hexane). The resultant was quenched with crushed ice to get a solid precipitate. The precipitate was collected and dried to afford 660mg (45percent yield) of l-Methyl-4-(2-methyl-4-nitro-phenyl)- piperazine.

Reference： [1]Patent: WO2016/22460,2016,A1 .Location in patent: Page/Page column 138
[2]Patent: WO2017/66428,2017,A1 .Location in patent: Page/Page column 250
[3]Patent: WO2019/238067,2019,A1 .Location in patent: Paragraph 0401; 0999-1001
[4]European Journal of Medicinal Chemistry,2016,vol. 124,p. 896 - 905
[5]Journal of Medicinal Chemistry,2017,vol. 60,p. 5099 - 5119
[6]Patent: WO2012/59932,2012,A1 .Location in patent: Page/Page column 111

39
[ 455-88-9 ]
1,2,3,4-tetrahydro-2,7-naphthyridine dihydrochloride [ No CAS ]
[ 1454657-58-9 ]

Yield	Reaction Conditions	Operation in experiment
42%	With N-ethyl-N,N-diisopropylamine; In dimethyl sulfoxide; at 115℃; for 20h;	Preparation 50 2-(2-methyl-4-nitrophenyl)-1,2,3,4-tetrahydro-2,7-naphthyridine A mixture of commercially available 1,2,3,4-tetrahydro-2,7-naphthyridine dihydrochloride (456 mg, 2.2 mmol), <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (512 mg, 3.3 mmol), and N,N-diisopropylethylamine (2.0 mL, 11.4 mmol) in 8.0 mL DMSO was heated at 115° C. for 20 hours. The reaction was added to a H2O/brine mixture, then extracted with EtOAc. The EtOAc portion was washed with a H2O/brine mixture, aqueous Na2CO3 solution, dried with anhydrous Na2SO4, and evaporated to an oil. An impure sample from a previous reaction (1.0 mmol scale) was combined, and then chromatographed eluting with CHCl3/EtOAc to give the title compound as a yellow solid (365 mg, 42percent combined yield). 1H NMR (CDCl3) delta: 8.40-8.43 (m, 2H), 8.05-8.11 (m, 2H), 7.14 (d, J=5.0 Hz, 1H), 7.11 (d, J=8.5 Hz, 1H), 4.27 (s, 2H), 3.36 (t, J=5.7 Hz, 2H), 3.04 (t, J=5.6 Hz, 2H), 2.42 (s, 3H).
42%	With N-ethyl-N,N-diisopropylamine; In dimethyl sulfoxide; at 115℃; for 20h;	Preparation 50 2-(2-methyl-4-nitrophenyl)-1,2,3,4-tetrahydro-2,7-naphthyridine A mixture of commercially available 1,2,3,4-tetrahydro-2,7-naphthyridine dihydrochloride (456 mg, 2.2 mmol), <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (512 mg, 3.3 mmol), and N,N-diisopropylethylamine (2.0 mL, 11.4 mmol) in 8.0 mL DMSO was heated at 115° C. for 20 hours. The reaction was added to a H2O/brine mixture, then extracted with EtOAc. The EtOAc portion was washed with a H2O/brine mixture, aqueous Na2CO3 solution, dried with anhydrous Na2SO4, and evaporated to an oil. An impure sample from a previous reaction (1.0 mmol scale) was combined, and then chromatographed eluting with CHCl3/EtOAc to give the title compound as a yellow solid (365 mg, 42percent combined yield). 1H NMR (CDCl3) delta: 8.40-8.43 (m, 2H), 8.05-8.11 (m, 2H), 7.14 (d, J=5.0 Hz, 1H), 7.11 (d, J=8.5 Hz, 1H), 4.27 (s, 2H), 3.36 (t, J=5.7 Hz, 2H), 3.04 (t, J=5.6 Hz, 2H), 2.42 (s, 3H).

Reference： [1]Patent: US2013/237538,2013,A1 .Location in patent: Paragraph 0424
[2]Patent: US2013/237537,2013,A1 .Location in patent: Paragraph 0408-0409

40
[ 455-88-9 ]
[ 123-31-9 ]
4-(2-methyl-4-nitrophenoxy)phenol [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
85%	With potassium carbonate; In N,N-dimethyl-formamide; at 110℃; for 8h;Inert atmosphere;	General procedure: Hydroquinone (1.22 g, 11.1 mmol) was added to amixture of substituted 4-halonitrobenzene and potassiumcarbonate (K2CO3) in dimethylformamide (DMF), and then heated 110 C for 8 hrs under a nitrogen atmosphere then cooled to room temperature. The reaction mixture was poured into ice water and insoluble materials were filteredoff to give the title compound [16].

Reference： [1]Combinatorial Chemistry and High Throughput Screening,2019,vol. 22,p. 307 - 316
[2]ACS Medicinal Chemistry Letters,2013,vol. 4,p. 937 - 941

41
[ 455-88-9 ]
[ 76274-09-4 ]

Yield	Reaction Conditions	Operation in experiment
63%		General procedure: To a 5 mL screw vial under N2 containing a freshly distilled DMF (0.6 mL) were successively added aromatic nitro compound (0.60 mmol), In(OTf)3 (0.030 mmol, 17 mg), and Et3SiH (1.80 mmol, 287 muL). The resulting mixture was stirred at 60 °C (bath temperature), and monitored by TLC analysis. After completion of the reaction, the resultant mixture was further stirred under either an ambient or an O2 atmosphere during the corresponding reaction time. The reaction was quenched with H2O (6 mL). The aqueous layer was extracted with AcOEt (6 mL×3), the combined organic phases were dried over anhydrous Na2SO4, filtered, and evaporated under reduced pressure. The crude product was purified by recrystallization from the solvent (hexane/chloroform) or silica gel column chromatography (hexane/AcOEt) to afford the corresponding azobenzene derivatives.

Reference： [1]RSC Advances,2015,vol. 5,p. 83144 - 83148
[2]Tetrahedron,2014,vol. 70,p. 2027 - 2033

42
[ 371-41-5 ]
[ 455-88-9 ]
C₁₃H₁₀FNO₃ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
100%		To a solution of Compound 42-8 (1.6 g, 14.18 mmol) in DMF (48 mL) at RT was added NaH (0.62 g of 60percent dispersion in mineral oil, 15.47 mmol). After 30 min at RT <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (Compound 46-35) (2.00 g, 12.89 mmol) was added and the mixture heated to 60°C for 1.5 h. The reaction mixture was cooled to RT, slowly poured into water and cooled to ca 0°C for 16 h. The resulting solid was collected by filtration, washed with water and dried to give Compound 46-36 as a tan solid (3.18 g). Yield 100percent. LC/MS: m/z = 248 [M + H]+.

Reference： [1]Patent: WO2014/135955,2014,A1 .Location in patent: Paragraph 0537

43
[ 455-88-9 ]
6-bromo-pyrazolo[1,5-a]pyridin-4-ol [ No CAS ]
6-bromo-4-(2-methyl-4-nitro-phenoxy)-pyrazolo[1,5-a]pyridine [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
77%		Step 1. 6-Bromo-4-(2-methyl-4-nitro-phenoxy)-pyrazolo[1,5-a]pyridine. To 6-bromo-pyrazolo[1,5-a]pyridin-4-ol (1.5 g, 7 mmol) in N,N-dimethylformamide (30 mL) at 0 C under an atmosphere of nitrogen was added sodium hydride, 60percent dispersion 20 in mineral oil (3:2, sodium hydride:mineral oil) (0.7 g, 18 mmol). After stirring 0.5 h at rt, <strong>[455-88-9]1-fluoro-2-methyl-4-nitro-benzene</strong> (3.3 g, 21.1 mmol) was added drop wise and stirred at 100 oC overnight. The reaction was diluted with ethyl acetate, washed with water and brine, dried over sodium sulfate, and concentrated. The product was chromatographed on silica gel using a single step column (5-10percent ethyl acetate/hexanes) and concentrated to 25 give 1.9 g, 77percent. LCMS m/z = 349 (M + 1).

Reference： [1]Patent: WO2015/100117,2015,A1 .Location in patent: Paragraph 0246

44
[ 455-88-9 ]
[ 113451-59-5 ]
(1S,4S)-tert-butyl 5-(2-methyl-4-nitrophenyl)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
56%	With potassium carbonate; In N,N-dimethyl-formamide; at 50 - 100℃; for 120h;Inert atmosphere;	A suspension of 2?fluoro?5?nitrotoluene (1.565 g, 10.09mmol), (1S,4S)?tert?butyl 2,5?diazabicyclo[2.2.1]heptane? 2?carboxylate (2.00 g, 10.09 mmol) and potassium carbonate (2.091 g, 15.13 mmol) in anhydrous DMF (8 mL) was heated to 50 °C under a nitrogen atmosphere for 2 days, then at 100°C for 3 days. The reaction mixture wasallowed to cool to room temperature, diluted with water (50 mL) and extracted into ethyl acetate (3 x 30 mL) . The combined organic phases were dried over Na2504, filtered and concentrated to dryness under reduced pressure. The residue was purified by Biotage chromatography (silicalOOg cartridge, cyclohexane:ethyl acetate, gradientelution from 90:10 to 0:100) to give the title compoundas a yellow solid (1.87 g, 56percent) . ?H NMR (300 MHz, CDC13)3 7.92?8.02 (m, 2H), 6.60 (dd, 1H), 4.56 (d, 1H), 4.44(s, 1H), 3.83 (d, 1H), 3.62 (dd, 1H), 3.47 (t, 1H), 3.32(dd, 1H), 2.36 (s, 3H), 1.86-2.06 (m, 2H), 1.38-1.49 (m,9H) . LCMS (Method C) : = 1.69 mi m/z = 334 [M+H].

Reference： [1]Patent: WO2015/92431,2015,A1 .Location in patent: Page/Page column 183

45
[ 134003-84-2 ]
[ 455-88-9 ]
(1R,4R)-tert-butyl 5-(2-methyl-4-nitrophenyl)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
60%	With potassium carbonate; In N,N-dimethyl-formamide; at 100℃; for 120h;Inert atmosphere;	A suspension of 2?fluoro?5?nitrotoluene (391 mg, 2.52 mmol), (1R,4R)?tert?butyl 2,5?diazabicyclo[2.2.1]heptane? 2?carboxylate (500 mg, 2.52 mmol) and potassium carbonate(523 mg, 3.78 mmol) in anhydrous DMF (2 mL) was heated to100 °C under a nitrogen atmosphere for 5 days. The reaction mixture was allowed to cool to room temperature, diluted with water (20 mL) and extracted into ethyl acetate (3 x 10 mL) . The combined organic phases weredried over Na2504, filtered and concentrated to dryness under reduced pressure. The residue was purified by Biotage chromatography (silica 50g cartridge, cyclohexane:ethyl acetate, gradient elution from 90:10 to 30:70) to give the title compound as a yellow solid(503 mg, 60percent) . ?H NMR (300 MHz, CDC13) : 3 7.97 (br s, 2H),6.60 (d, 1H), 4.56 (d, 1H), 4.44 (s, 1H), 3.83 (d, 1H),3.62 (dd, 1H), 3.47 (t, 1H), 3.32 (dd, 1H), 2.36 (s, 3H),1.86?2.06 (m, 2H) , 1.34?1.57 (m, 9H) . LCMS (Method C) := 1.68 mi m/z = 334 [M+H].

Reference： [1]Patent: WO2015/92431,2015,A1 .Location in patent: Page/Page column 239

46
[ 134003-84-2 ]
[ 455-88-9 ]
(1R,4R)-tert-butyl 5-(2-methyl-4-aminophenyl)-2,5-diazabicyclo[2.2.1]heptane-2-carboxylate [ No CAS ]

Reference： [1]Patent: WO2015/92431,2015,A1

47
[ 455-88-9 ]
[ 103-16-2 ]
4-(4-benzyloxyphenoxy)-3-methylnitrobenzene [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
65%		An aqueous solution of 5M sodium hydroxide (2.0 ml, 10 mmol)was added to DMSO (8 ml) at room temperature under an Ar atmosphere.After 10 min, O-monobenzylhydroquinone (961 mg, 4.8 mmol)was added to it. The mixture was stirred at 50 °C for 15 min, then <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (620 mg, 4.0 mmol) was added, and stirring wascontinued at 50 °C for 5.5 h, and at room temperature for 15 h. Thereaction mixture was then poured into ice water and the precipitate was collected by filtration to give 29a (R2=2-Me, 1.04 g, 65percent).29a (R2=2-Me): Yellow powder; 1H NMR (600 MHz, CDCl3) delta 8.13(d, J=2.1 Hz, 1H), 7.96 (dd, J=8.9, 2.7 Hz, 1H), 7.36 (m, 5H), 7.02(dt, J=9.6, 2.8 Hz, 2H), 6.99 (dt, J=8.9, 2.7 Hz, 2H), 6.69 (d,J=8.9 Hz, 1H), 5.08 (s, 2H), 2.42 (s, 3H); 13C NMR (150 MHz, CDCl3)delta 162.21, 156.04, 148.51, 142.06, 136.67, 128.65, 128.12, 127.48,126.64, 123.14, 121.50, 116.24, 114.47.

Reference： [1]ACS Medicinal Chemistry Letters,2016,vol. 7,p. 1028 - 1033
[2]Bioorganic and Medicinal Chemistry,2018,vol. 26,p. 5118 - 5127

48
[ 31166-44-6 ]
[ 455-88-9 ]
benzyl 4-(2-methyl-4-nitrophenyl)piperazine-1-carboxylate [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
59%	With caesium carbonate; In dimethyl sulfoxide; at 140℃; for 2h;	(0992) [00345] Into a 100-mL round-bottom flask was added l-fluoro-2-methyl-4-nitrobenzene (1.55 g, 9.99 mmol), benzyl piperazine-l-carboxylate (2,20 g, 9,99 mmol) and CS2CO3 (9.78 g, 30.0 mmol) followed by DMSO (15 rnL). The resulting suspension was stirred for 2 h at 140 °C and then quenched with water (50 rnL) and extracted with ethyl acetate (3 x 100-mL). The combined organic layers were dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. The crude product was purified by FCC eluting with ethyl acetate/petroleum ether (1 : 10) to (0993) 135 (0994) 144628010 vl afford benzyl 4-(2-methyl-4-nitrophenyl)piperazine-l-carboxylate as an orange solid (2.1 g, 59percent). LCMS (ESI, m/z) 356 [M+Hf.

Reference： [1]Patent: WO2017/139778,2017,A1 .Location in patent: Paragraph 00345

49
[ 455-88-9 ]
[ 108-98-5 ]
[ 70264-20-9 ]

Yield	Reaction Conditions	Operation in experiment
82%	With potassium hydroxide; In ethanol; at 0 - 20℃;	Ethanol (30 mL) and potassium hydroxide (2.1 g, 37 mmol) were placed in a 100 mL round-bottom flask equipped with a stirring bar, and the temperature was set to 0° C. while stirring. Benzene thiol (3.3 g, 30 mmol) and <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (5.6 g, 36 mmol) were added to the flask, and the resulting mixture was stirred overnight at room temperature. After completion of the reaction, saturated aqueous ammonium chloride was added to the flask. An organic layer was separated, and an aqueous layer was extracted with hexane three times. The organic layer obtained was combined with the hexane extract, and the resulting mixture was dried on sodium sulfate, followed by filtration and vacuum concentration. Thus, a crude product was obtained as an oily residue. The crude product was refined by silica gel column chromatography (eluent: hexane). As a result, (2-methyl-4-nitrophenyl)phenyl sulfide was obtained in a yield of 82percent.

Reference： [1]Patent: US2017/305848,2017,A1 .Location in patent: Paragraph 0273

50
[ 455-88-9 ]
[ 105-13-5 ]
1-((4-methoxybenzyl)oxy)-2-methyl-4-nitrobenzene [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
92%	With potassium hydroxide; In acetonitrile;	A mixture of 1 -fluoro-2-methyl-4-nitrobenzene (20.0 g, 129.0 mmol), PMBOH (17.8 g, 129 mmol) and potassium hydroxide (10.8 g, 194.0 mmol) in 150 mL of acetonitrile were stirred overnight. Water was added to the mixture, the mixture was filtered, washed with water and dried to give l-((4-methoxybenzyl)oxy)- 2-methyl-4-nitrobenzene (32.1 g, yield 92.0percent). XH NMR (CDC13, 400 MHz) delta 8.10- 8.07 (m, 2H), 7.37-7.35 (d, J = 8.8 Hz, 2H), 6.95-6.92 (m, 3H), 5.11 (s, 2H), 3.83 (s, 3H), 2.31 (s, 3H).

Reference： [1]Patent: WO2017/151489,2017,A1 .Location in patent: Paragraph 0275

51
[ 767-15-7 ]
[ 455-88-9 ]
C₁₃H₁₄N₄O₂ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
	With caesium carbonate; In N,N-dimethyl-formamide; at 80℃; for 16h;	To a stirred solution of 2-fluoro-5-nitrotoluene (2 g, 12.903 mmol) in DMF (15 ml) was added 2- amino-3,5-dimethylpyrimidine (1.58 g, 12.90 mmol) and Cs2CO3 (6.2 g, 25.806 mmol) in a flask at room temperature and stirred for 16 h at 80 °C. Reaction mixture was monitored by TLC (50percent Ethyl acetate/Pet ether). After completion of the reaction, the reaction was allowed to room temperature and poured into ice water mixture and extracted with AcOEt (2 X 100 ml). The combined organic layers were dried over Na2SO4, filtered and concentrated under reduced pressure to give crude 4-methyl-N-(2-methyl-4-nitrophenyl) pyrimidin-2-amine (2.2 g). The crude product was used for next step without purification. Mass: (ES+) C13H14N4O2 required 258.1; found 259.1 [M+H], HPLC/MS method 2.

Reference： [1]Patent: WO2017/191599,2017,A1 .Location in patent: Page/Page column 174

52
[ 54903-50-3 ]
[ 455-88-9 ]
5-(2-methyl-4-nitrophenyl)-4,5,6,7-tetrahydrothieno[3,2-c]pyridine [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
80%		4,5,6,7-tetrahydrothieno[3,2-c]pyridine (6.9 g, 50.00 mmol), potassium carbonate (10.4 g,75.00 mmol), N,N-dimethylformamide (100 mL) was added to a 250 mL single-mouth bottle, and the reaction flask was heated to 65 ° C.Mix for 2 hours. Then slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (8.1 g, 52.00 mmol) in N,N-dimethylformamide solution(30 mL), the reaction was continued for 10 hours after completion of the dropwise addition, and the reaction mixture was cooled to room temperature after completion of the reaction. Pour the mixture intoStir in ice water (300 mL) for 30 minutes, solid precipitated, filtered, and the filter cake was washed with water (100 mL x 3) to give the title compound(yellow solid, 11.1 g, yield: 80percent).

Reference： [1]Patent: CN108690043,2018,A .Location in patent: Paragraph 0175; 0177-0178

53
[ 96631-87-7 ]
[ 455-88-9 ]
1-(2-methyl-4-nitrophenyl)-1H-indole-7-carbonitrile [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
79%		7-Cyanoguanidine (2.13 g, 15.00 mmol), potassium carbonate (4.14 g, 30.00 mmol), N,N-dimethylformylThe amine (50 mL) was added to a 100 mL single-necked flask and heated to 65 ° C for 2 hours. Slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong>(2.79 g, 18.00 mmol) of a solution of N,N-dimethylformamide (20 mL), and the reaction was continued for 10 hours after the dropwise addition. Will mixCool to room temperature, pour into ice water (100 mL) and stir for 30 minutes. Solids are precipitated, filtered, and the filter cake is washed with water (100 mL x3) The title compound was obtained (yellow solid, 3.28 g, yield: 79percent).

Reference： [1]Patent: CN108690043,2018,A .Location in patent: Paragraph 0188; 0190-0191

54
[ 20980-22-7 ]
[ 455-88-9 ]
2-(4-(2-methyl-4-nitrophenyl)piperazin-1-yl)pyrimidine [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
78%		1-(2-pyrimidinyl)piperazine (2.46 g, 15.00 mmol), potassium carbonate (4.14 g, 30.00 mmol) and N,N-dimethylThe carbamide (50 mL) was added to a 100 mL single-necked flask and heated to 65 ° C for 2 hours. Slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong>(2.79 g, 18.00 mmol) in N,N-dimethylformamide (20 mL). Cool to room temperature and mixThe mixture was poured into ice water (100 mL) and stirred for 30 minutes, a solid precipitated, filtered, and the filter cake was washed with water (100 mL x 3) to giveThe title compound (yellow solid, 3.50 g, yield: 78percent).

Reference： [1]Patent: CN108690043,2018,A .Location in patent: Paragraph 0226; 0228-0229

55
[ 1820-80-0 ]
[ 455-88-9 ]
N-(2-methyl-4-nitrophenyl)-1H-pyrazole-3-amine [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
83%		3-Aminopyrazole (1.25 g, 15.00 mmol), potassium carbonate (4.14 g, 30.00 mmol) and N,N-dimethylformylThe amine (50 mL) was added to a 100 mL single-necked flask and heated to 65 ° C for 2 hours. Slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong>(2.79g, 18.00mmol)A solution of N,N-dimethylformamide (20 mL) was stirred for 10 h. Cool to room temperature and mixThe mixture was poured into ice water (100 mL) and stirred for 30 minutes, a solid precipitated, filtered, and the filter cake was washed with water (100 mL x 3) to giveThe title compound (brown solid, 2.71 g, yield: 83percent).

Reference： [1]Patent: CN108690043,2018,A .Location in patent: Paragraph 0286; 0288-0289

56
[ 455-88-9 ]
[ 1003-03-8 ]
N-cyclopentyl-2-methyl-4-nitroaniline [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
86%		Cyclopentylamine (1.28 g, 15.00 mmol), potassium carbonate (4.14 g, 30.00 mmol) and N,N-dimethylformamide(50 mL) was added to a 250 mL single-mouth bottle and heated to 65 ° C for 2 hours. Slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong> (2.79g,A solution of 18.00 mmol of N,N-dimethylformamide (20 mL) was stirred for 10 h. Cool to room temperature and pour the mixture toStir in ice water (100 mL) for 30 minutes, solid precipitated, filtered, and the filter cake was washed with water (100 mL x 3) to give the title compound(yellow solid, 2.84 g, yield: 86percent).

Reference： [1]Patent: CN108690043,2018,A .Location in patent: Paragraph 0298; 0300-0301

57
[ 141-91-3 ]
[ 455-88-9 ]
2,6-dimethyl-4-(2-methyl-4-nitrophenyl)morpholine [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
83%		2,6-Dimethylmorpholine (1.73 g, 15.00 mmol), potassium carbonate (4.14 g, 30.00 mmol) and N,N-dimethylFormamide (50 mL) was added to a 250 mL single-mouth bottle and heated to 65 ° C for 2 hours. Slowly add <strong>[455-88-9]2-fluoro-5-nitrotoluene</strong>(2.79 g, 18.00 mmol) in N,N-dimethylformamide (20 mL). Cool to room temperature and mixThe mixture was poured into ice water (100 mL) and stirred for 30 minutes, a solid precipitated, filtered, and the filter cake was washed with water (100 mL x 3) to giveThe title compound (yellow solid, 3.11 g, yield: 83percent).

Reference： [1]Patent: CN108690043,2018,A .Location in patent: Paragraph 0322; 0324-0325

58
[ 455-88-9 ]
[ 35852-58-5 ]
C₁₄H₉ClF₃NO₃ [ No CAS ]

Reference： [1]Journal of Agricultural and Food Chemistry,2019

59
[ 455-88-9 ]
[ 68104-63-2 ]
4-[4-(2-methyl-4-nitrophenyl)piperazin-1-yl]benzonitrile [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
63%		To a solution under N2 of l-(4-cyanophenyl)piperazine (543 mg, 2.9 mmol) in DMF (10 ml) was added K2CO3 (672 mg, 4.83 mmol) and the mixture was stirred at 25 C for 5 min. After that 2-fluoro- 5 -nitro toluene (300 mg, 1.93 mmol) was added. The reaction vessel was sealed and the mixture was stirred 16 h at 100 C. After cooling to 25 C, the reaction mixture was diluted with H20 (30 ml) and extracted with EtOAc (2 x 100 ml). The organic phases were washed with brine, dried over Na2S04 and concentrated under reduced pressure. The crude product was purified by flash chromatography (20% EtO Ac/hexane) to get 4-[4-(2- methyl-4-nitro-phenyl)piperazin-l-yl]benzonitrile (440 mg, 63%) as orange solid

Reference： [1]Patent: WO2019/121661,2019,A1 .Location in patent: Page/Page column 79; 80

60
[ 455-88-9 ]
[ 1216936-29-6 ]
tert-butyl 7-(2-methyl-4-nitrophenyl)-1,7-diazaspiro[3.5]nonane-1-carboxylate [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
46%	With potassium carbonate; In N,N-dimethyl acetamide; at 120℃; for 24h;	tert- Butyl 1 ,7-diazaspiro[3.5]nonane-1-carboxylate (500 mg, 2.21 mmol) was dissolved in DMA (15 ml_) and <strong>[455-88-9]1-fluoro-2-methyl-4-nitrobenzene</strong> (commercial, 343 mg, 2.21 mmol) was added followed by potassium carbonate (1.53 g, 11.05 mmol). The suspension was heated to 120C and stirred for 24 hours before cooling to RT and diluting with EtOAc. The organic phase was washed with 1 x water and 3 x 50% saturated brine solution and dried (anh. MgS04) and concentrated in vacuo. The residue was purified by flash chromatography (0- 50% EtOAc in Cyclohexane) to give the desired compound (379 g, 46%) as a yellow solid. LCMS (Method A): RT = 1.86 min, m/z = 362 [M+H]+.

Reference： [1]Patent: WO2019/138227,2019,A1 .Location in patent: Page/Page column 92-93

61
[ 455-88-9 ]
[ 73874-95-0 ]
tert-butyl (1-(2-methyl-4-nitrophenyl)piperidin-4-yl)carbamate [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
73%	With potassium carbonate; In N,N-dimethyl acetamide; at 140℃; for 40h;	<strong>[455-88-9]1-Fluoro-2-methyl-4-nitrobenzene</strong> (1.0 g, 6.45 mmol), tert- butyl piperidin-4-ylcarbamate (1.29 g, 6.45 mmol) and potassium carbonate (4.45 g, 32.2 mmol) were suspended in DMA (4 ml_). The reaction mixture was heated at 140 C for 40h. Next transferred to a separatory funnel. Water (40 ml_) and EtOAc (40 ml_) were added. The organic layer was separated and washed with water (2 x 40 ml_) and brine (40 ml_), then dried (anh. MgS04) and evaporated under reduced pressure. The residue was purified by flash chromatography (20-50% EtOAc in cyclohexane) yielding the title compound (1570 mg, 73%) as a yellow solid. LCMS (Method B): RT = 1.56 min, m/z = 236 [M+H]+

Reference： [1]Patent: WO2019/138227,2019,A1 .Location in patent: Page/Page column 71-72; 84-85

62
[ 455-88-9 ]
[ 122536-76-9 ]
tert-butyl (S)-(1-(2-methyl-4-nitrophenyl)pyrrolidin-3-yl)carbamate [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
83%	With potassium carbonate; In N,N-dimethyl acetamide; at 140℃; for 20h;	<strong>[455-88-9]1-Fluoro-2-methyl-4-nitrobenzene</strong> (0.42 g, 2.68 mmol), tert- butyl (S)-pyrrolidin-3- ylcarbamate (0.5 g, 2.68 mmol) and potassium carbonate (1.86 g, 13.42 mmol) were suspended in DMA (2 ml_). The reaction mixture was heated at 140 C for 20h. Next transferred to a separatory funnel and water (20 ml_) followed by EtOAc (20 ml_) were added. The organic layer was separated and then washed with water (2 x 20 ml_) and brine (20 ml_). The extract was dried (anh. MgS04) and evaporated under reduced pressure. The residue was purified by flash chromatography (10-50% EtOAc in cyclohexane) yielding the title compound (712 mg, 83%) as a yellow solid. LCMS (Method B): RT = 1.42 min, m/z = 322 [M+H]+.

Reference： [1]Patent: WO2019/138227,2019,A1 .Location in patent: Page/Page column 65-66

63
[ 13425-93-9 ]
[ 455-88-9 ]
[ 347161-73-3 ]

Yield	Reaction Conditions	Operation in experiment
22.4%	With caesium carbonate; In dimethyl sulfoxide; at 50℃; for 12h;	To a mixture of Bll (500 mg, 2.44 mmol, 1 eq) and l-fluoro-2-methyl-4-nitro-benzene (756 mg, 4.87 mmol, 2 eq) in DMSO (5 mL) was added CS2CO3 (1.59 g, 4.87 mmol, 2 eq). The reaction mixture was stirred at 50C for 12 hours to give a black mixture. LCMS showed the reaction was completed. The mixture was diluted with EtOAc (100 mL), washed with water (30 mL x 3) and brine (30 mL), concentrated under reduced pressure to give a crude compound. The crude compound was purified by flash silica gel chromatography (ISCO; 12 g SepaLlash Silica Llash Column, Eluent of 5-70% Ethyl acetate/Petroleum ethergradient 30 mL/min) to afford B13 (190 mg, 22.4% yield, 98% purity) as a yellow solid.

Reference： [1]Journal of Medicinal Chemistry,2019,vol. 62,p. 6083 - 6101
[2]Patent: WO2019/229251,2019,A1 .Location in patent: Page/Page column 79

64
[ 50591-22-5 ]
[ 455-88-9 ]
C₁₅H₁₃N₃O₃ [ No CAS ]

Reference： [1]Patent: WO2019/214634,2019,A1 .Location in patent: Page/Page column 55; 56; 57

65
[ 455-88-9 ]
[ 33631-05-9 ]
[ 864244-98-4 ]

Reference： [1]Patent: WO2019/214634,2019,A1 .Location in patent: Page/Page column 58

66
[ 455-88-9 ]
[ 324-94-7 ]
C₁₉H₁₄FNO₃ [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
87.1%		4-Fluoro-4'-hydroxybiphenyl (1.02 g, 5.40 mmol), potassium carbonate (1.35 g, 9.8 mmol)Add to 100mL single-necked flask, add 10mL dry N, N-dimethylformamide,After stirring at room temperature for 30 minutes, 3-methyl-4-fluoronitrobenzene (760 mg, 4.9 mmol) was slowly added, and the reaction was completed at 100 C. for 12 hours under the protection of nitrogen. Cool to room temperature,Add ice water and stir vigorously, a solid precipitates, suction filter and wash the filter cake with water (15mL x 3),Drying gave 1.52 g of pale yellow solid, yield: 87.1%.

Reference： [1]Patent: CN110452167,2019,A .Location in patent: Paragraph 0378-0382

67
[ 616-43-3 ]
[ 455-88-9 ]
3-methyl-1-(2-methyl-4-nitrophenyl)-1H-pyrrole [ No CAS ]

Yield	Reaction Conditions	Operation in experiment
66%		In a RBF, previously equipped with a magnetic stirrer and nitrogen balloon, was taken 3- MethyM H-pyrrole (1.17 g, 14.5 mmol) in DMSO (15 ml) and it was cooled to 0C. To it, Potassium tert-butoxide (1.62 g, 14.5 mmol) was added portion-wise to the mixture and it was stirred for 1 h. 1-Fluoro-2-methyl-4-nitrobenzene (1.50 g, 9.7 mmol) was added drop- wise to the mixture and the reaction mixture was stirred and allowed to come to room temperature and stirred at room temperature for 1 h. The reaction mixture was quenched with ice-water (50 ml) and product was extracted with Ethyl Acetate (3 x 30 ml). The combined organic layer was washed with brine (30 ml), dried over sodium sulphate and solvent removed under reduced pressure to obtain 1.4 g (66%) of the title compound. 1H NMR (400 MHz, DMSO-cfe): d 8.250 (s, 1 H), d 8.099 (d, J=8.4, 1 H), d 7.459 (d, J=8.8, 1 H), d 6.971 (s, 1 H), d 6.843 (s, 1 H), 6 6.135(s, 1 H), 6 2.378 (s, 3H), 6 2.081 (s, 3H).

Reference： [1]Patent: WO2020/2949,2020,A1 .Location in patent: Page/Page column 67-68

68
[ 139911-27-6 ]
[ 455-88-9 ]

Reference： [1]Organic Letters,2020

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Code	Phrase
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P103	Read label before use
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Code	Phrase
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Code	Phrase
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H362	May cause harm to breast-fed children
H370	Causes damage to organs
H371	May cause damage to organs
H372	Causes damage to organs through prolonged or repeated exposure
H373	May cause damage to organs through prolonged or repeated exposure
Environmental hazards
Code	Phrase
H400	Very toxic to aquatic life
H401	Toxic to aquatic life
H402	Harmful to aquatic life
H410	Very toxic to aquatic life with long-lasting effects
H411	Toxic to aquatic life with long-lasting effects
H412	Harmful to aquatic life with long-lasting effects
H413	May cause long-lasting harmful effects to aquatic life
H420	Harms public health and the environment by destroying ozone in the upper atmosphere

[ CAS No. 455-88-9 ]

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[ 455-88-9 ] Synthesis Path-Upstream 1~26

[ 455-88-9 ] Synthesis Path-Downstream 1~68

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Fluorinated Building Blocks

Aryls

Nitroes

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[ 455-88-9 ]