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Product Citations

Jang, Mingyeong ; Lim, Taeho ; Park, Byoung Yong , et al. DOI: PubMed ID:

Abstract: In this study, we developed a metal-free and highly chemoselective method for the reduction of aromatic nitro compounds. This reduction was performed using tetrahydroxydiboron [B2(OH)4] as the reductant and 4,4'-bipyridine as the organocatalyst and could be completed within 5 min at room temperature. Under optimal conditions, nitroarenes with sensitive functional groups, such as vinyl, ethynyl, carbonyl, and halogen, were converted into the corresponding anilines with excellent selectivity while avoiding the undesirable reduction of the sensitive functional groups.

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Product Details of [ 5470-18-8 ]

CAS No. :5470-18-8 MDL No. :MFCD00006232
Formula : C5H3ClN2O2 Boiling Point : -
Linear Structure Formula :- InChI Key :UUOLETYDNTVQDY-UHFFFAOYSA-N
M.W : 158.54 Pubchem ID :79613
Synonyms :

Calculated chemistry of [ 5470-18-8 ]      Expand+

Physicochemical Properties

Num. heavy atoms : 10
Num. arom. heavy atoms : 6
Fraction Csp3 : 0.0
Num. rotatable bonds : 1
Num. H-bond acceptors : 3.0
Num. H-bond donors : 0.0
Molar Refractivity : 38.07
TPSA : 58.71 Ų

Pharmacokinetics

GI absorption : High
BBB permeant : Yes
P-gp substrate : No
CYP1A2 inhibitor : No
CYP2C19 inhibitor : No
CYP2C9 inhibitor : No
CYP2D6 inhibitor : No
CYP3A4 inhibitor : No
Log Kp (skin permeation) : -6.1 cm/s

Lipophilicity

Log Po/w (iLOGP) : 1.01
Log Po/w (XLOGP3) : 1.64
Log Po/w (WLOGP) : 1.64
Log Po/w (MLOGP) : 0.68
Log Po/w (SILICOS-IT) : -0.09
Consensus Log Po/w : 0.98

Druglikeness

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

Water Solubility

Log S (ESOL) : -2.23
Solubility : 0.925 mg/ml ; 0.00583 mol/l
Class : Soluble
Log S (Ali) : -2.49
Solubility : 0.518 mg/ml ; 0.00327 mol/l
Class : Soluble
Log S (SILICOS-IT) : -2.01
Solubility : 1.55 mg/ml ; 0.00979 mol/l
Class : Soluble

Medicinal Chemistry

PAINS : 0.0 alert
Brenk : 3.0 alert
Leadlikeness : 1.0
Synthetic accessibility : 1.85

Safety of [ 5470-18-8 ]

Signal Word:Warning Class:
Precautionary Statements:P261-P301+P312-P302+P352-P304+P340-P305+P351+P338 UN#:
Hazard Statements:H302-H315-H319-H335 Packing Group:
GHS Pictogram:

Application In Synthesis of [ 5470-18-8 ]

* 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 [ 5470-18-8 ]
  • Downstream synthetic route of [ 5470-18-8 ]

[ 5470-18-8 ] Synthesis Path-Upstream   1~67

  • 1
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  • [ 6636-78-8 ]
Reference: [1] Chemische Berichte, 1936, vol. 69, p. 2593,2604
  • 2
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  • [ 5028-20-6 ]
Reference: [1] Chemische Berichte, 1936, vol. 69, p. 2593,2604
[2] Patent: US2011/319394, 2011, A1,
[3] Patent: CN106831776, 2017, A,
[4] Chemistry - A European Journal, 2017, vol. 23, # 57, p. 14173 - 14176
[5] Open Medicinal Chemistry Journal, 2018, vol. 12, # 1, p. 74 - 83
  • 3
  • [ 5470-18-8 ]
  • [ 3430-10-2 ]
Reference: [1] Synthetic Communications, 1981, vol. 11, # 9, p. 743 - 750
  • 4
  • [ 5470-18-8 ]
  • [ 271-29-4 ]
Reference: [1] Journal of Organic Chemistry, 2002, vol. 67, # 7, p. 2345 - 2347
[2] European Journal of Medicinal Chemistry, 2011, vol. 46, # 10, p. 5086 - 5098
[3] Patent: US2011/263541, 2011, A1,
[4] Journal of Medicinal Chemistry, 2012, vol. 55, # 22, p. 9531 - 9540
[5] Journal of Medicinal Chemistry, 2014, vol. 57, # 10, p. 4009 - 4022
  • 5
  • [ 5470-18-8 ]
  • [ 124-41-4 ]
  • [ 20265-38-7 ]
YieldReaction ConditionsOperation in experiment
3.91 g
Stage #1: at 0 - 20℃; for 3.5 h; Inert atmosphere
Stage #2: With palladium 10% on activated carbon; hydrogen In tetrahydrofuran; methanol
Step Four: To a suspension of 2-chloro-3-nitropyridine (5.00 g, 31.5 mmol) in anhydrous methanol (20 mL) at 0° C. under nitrogen, a solution of sodium methoxide in methanol (25percent, 14.4 mL, 63.1 mmol) was added dropwise over 30 minutes.
The mixture was allowed to warm to room temperature and was stirred for 3 hours then was poured into saturated aqueous ammonium chloride.
The resulting mixture was extracted three times with ethyl acetate.
The combined organic layers were dried over magnesium sulfate, filtered and concentrated under reduced pressure.
The residue was taken up in tetrahydrofuran (7 mL) and methanol (7 mL), and palladium on carbon (10percent, catalytic amount) was added.
The mixture was placed under a hydrogen atmosphere (toggle between vacuum and hydrogen gas from a balloon several times) and stirred overnight.
The reaction was not complete, so the reaction mixture was filtered through Celite® and the filtrate was treated with fresh palladium on carbon and placed under hydrogen as before.
The mixture was stirred for 7 hours, then filtered through Celite® and concentrated to give 2-methoxypyridin-3-amine (2-4, 3.91 g).
Reference: [1] Patent: US2018/312523, 2018, A1, . Location in patent: Paragraph 1607; 1620
  • 6
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Reference: [1] Chemische Berichte, 1935, vol. 68, p. 315,321
[2] Tetrahedron, 1997, vol. 53, # 37, p. 12505 - 12524
[3] Chemische Berichte, 1936, vol. 69, p. 2593,2604
  • 7
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YieldReaction ConditionsOperation in experiment
80%
Stage #1: With sodium t-butanolate In 1-methyl-pyrrolidin-2-one at 16 - 35℃; for 2 h;
Stage #2: at 29 - 50℃; for 1.16667 h;
Stage #3: With sulfuric acid In water at 50 - 100℃; for 0.75 h;
Add NMP (2.0 L) to a 12-L, 3-neck flask fitted with a stirrer, a temperature probe and a reflux condenser fitted with a gas adapter for N2 and cool to 16° C.. Add sodium tert-butoxide (0.675 kg, 6.81 mol, 2.2 equiv., corrected for 97percent purity) in one portion whereupon one observes an immediate exotherm to 29° C. Stir the mixture for 30 min to partially dissolve the NaOt-Bu and then add diethyl malonate (0.943 L, 6.19 mol, 2.0 equiv.) at 20° C. to 35° C. over 70 min with continual cooling whereupon a homogeneous solution forms. Stir for 20 min and add a solution of 2-chloro-3-nitropyridine (1a-1, 0.491 kg, 3.09 mol, 1.0 equiv.) and NMP (1.0 L) to the reaction mixture at 29° C. to 44° C. over 70 min. Heat the reaction mixture to 50° C. Monitor the progress of the reaction HPLC (Agilent series 1100; Waters Symmetry C8 (5μ) column (3.9.x.150 mm), flow rate at 1.0 mL/min. Isocratic: CH3CN/0.1percent aq. TFA, 50/50; λ=220 nm. RT: diethyl malonate=2.6 min, 2-chloro-3-nitropyridine=2.7 min, 2-(3-nitro-pyridin-2-yl)-malonic acid diethyl ester =3.9 min). Typically >99percent conversion occurs within 1-2 h. Discontinue heating and add 6M H2SO4 (2.17 L) at 50° C. to 59° C. over 45 min. A thick solid precipitate forms during the addition. Heat the mixture to 100° C. The evolution of gas occurs. Monitor the progress of the reaction by HPLC as previously described (RT: 2-methyl-3-nitropyridine 2a-1=2.0 min, 2-(3-nitro-pyridin-2-yl)-malonic acid diethyl ester=3.9 min). Typically one observes >99percent conversion within 12 h. Allow the mixture to cool to 40° C. and pour into ice water (20 kg, pH 1.5). Add 25percent aq. NaOH (2.65 L) at -11° C. to -6° C. over 20 min to pH 11. Add toluene (4.0 L) and stir the mixture for 10 min. Filter the mixture through Celite.(R). to remove inorganic solids and wash the filtercake with toluene (6.0 L). Separate the phases and extract the aqueous phase twice with toluene (6.0 L and 4.0 L). Filter the combined toluene phases through Celite.(R). and wash the filter cake with toluene (1.0 L). Combine the toluene filtrates and wash with water (2.x.3.0 L). Dry (MgSO4) the toluene phase, filter and concentrate to give 2-methyl-3-nitropyridine 2a-1 (0.34 kg, 80percent yield, correct for residual NMP and toluene) as an oil. HPLC analysis shows the material to be 96percent pure. 1H NMR (CDCl3) δ 2.87 (s, 3H), 7.35 (dd, 1H, J=4.8, 8.1 Hz), 8.27 (dd, 1H, J=1.4, 8.1 Hz), δ 8.72 (dd, 1H, J=1.4, 4.8 Hz).
Reference: [1] Patent: US2005/131012, 2005, A1, . Location in patent: Page/Page column 13-14
[2] Organic and Biomolecular Chemistry, 2005, vol. 3, # 20, p. 3701 - 3706
[3] Synthetic Communications, 1990, vol. 20, # 19, p. 2965 - 2970
[4] Patent: WO2011/73092, 2011, A1,
[5] Organic Process Research and Development, 2011, vol. 15, # 5, p. 1040 - 1045
[6] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 1, p. 339 - 342
[7] Journal of Medicinal Chemistry, 2012, vol. 55, # 22, p. 9531 - 9540
  • 8
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  • [ 18699-87-1 ]
YieldReaction ConditionsOperation in experiment
55% With potassium carbonate In 1,4-dioxane for 24 h; Heating / reflux A mixture of 2-chloro-3-nitropyridine (1.6g, 10.09mmol), Pallac tetrakis(triphenylphosphine) (1170mg, 1.01 mmol), methylboronic acid (665mg, mmol ) and potassium carbonate (4180mg, 30.3 mmol) was refluxed in dioxane 1 days. The reaction was cooled to room temperature, and then filtered. The filtrate concentrated and the residue was purified by flash column chromatography (? EtOAc/Hexanes) to afford 760mg (55percent) of 2-methyl-3-nitropyridine. 1H NMR (CDC 8.71 (tetra, 1.7Hz, 5.0Hz, 1H), 8.26 (tetra, 1.7Hz, 8.3Hz, 1H)1 7.34 (dd, 5.( 8.3Hz, 1 H), 2.85 (s, 3H). MS m/z 139.1(M+H)+.
Reference: [1] Tetrahedron, 1998, vol. 54, # 23, p. 6311 - 6318
[2] Bioorganic and Medicinal Chemistry Letters, 2007, vol. 17, # 15, p. 4232 - 4241
[3] Patent: WO2009/1214, 2008, A2, . Location in patent: Page/Page column 52
[4] Organic and Biomolecular Chemistry, 2005, vol. 3, # 20, p. 3701 - 3706
[5] Patent: US2005/131012, 2005, A1, . Location in patent: Page/Page column 13
[6] Patent: WO2006/25716, 2006, A1, . Location in patent: Page/Page column 12
[7] Patent: WO2006/25717, 2006, A1, . Location in patent: Page/Page column 9
[8] Patent: US2011/152296, 2011, A1, . Location in patent: Page/Page column 12
  • 9
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  • [ 105-53-3 ]
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YieldReaction ConditionsOperation in experiment
60% With sodium In sulfuric acid; toluene Method 1
Into a flask containing diethyl malonate (20 g, 0.125 mol) was added sodium (2.0 g, 0.087 mol).
The reaction mixture was stirred for 1 h at room temperature and then allowed to warm to 120° C. (oil bath temperature) for 50 min.
To this yellow suspension of the solid mass was added toluene (120 mL) followed by addition of a solution of 2-chloro-3-nitropyridine 1 (12.8 g, 0.08 mol) in 40 mL of toluene.
The reaction mixture was refluxed for 8 h, and then stirred overnight at room temperature.
The solvent was removed under reduced pressure and the residue was dissolved in 30percent H2 SO4 (60 mL).
This reaction mixture was heated to 125° C. (oil bath) for 7 h, cooled and poured into ice (200 g).
The reaction mixture was neutralized with saturated NaHCO3 solution, filtered through Celite, extracted several times with ether.
The combined extracts were dried over anhydrous Na2 SO4.
The solvent was evaporated and the residue was distilled under reduced pressure to provide 6.65 g (60percent) of the desired product 3.
Reference: [1] Organic Letters, 2009, vol. 11, # 6, p. 1357 - 1360
[2] Patent: US5869676, 1999, A,
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  • [ 5158-46-3 ]
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Reference: [1] Patent: EP1510516, 2005, A1, . Location in patent: Page/Page column 134
  • 11
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  • [ 823-96-1 ]
  • [ 18699-87-1 ]
YieldReaction ConditionsOperation in experiment
42% With potassium carbonate In 1,4-dioxane for 24 - 48 h; Heating / reflux Example 77; N-Methyl-3-(2-(2-oxoindolin-5-ylamino)-5-(trifluoromethvπpyridin-4-ylamino)picolinamide; 2-Methyl-3-nitropyridine; Reference: Gray, M.; Andrews, I.P.; Hook, D. F.; Kitteringham, J.; Voyle, M.; Tetrahedron Lett.; 2000, 41, 6237 - 6240.The mixture of 2-chloro-3-nitropyridine (50 g, 0.315mol, 1.0 eq), TMB (50 mL, 1.1 eq), (PPh3)4Pd (0) (36.4 g, 0.1 eq), K2CO3 (130.6 g, 3.0 eq) and dioxane (1500 mL) was refluxed under argon for 2 days. The mixture was cooled to room temperature and filtered through a celite pad to remove K2CO3 and catalyst. The celite pad was washed with EtOAc. The organic solutions were combined and concentrated to get the crude which was purified by silica gel chromatography (0percent~40percent EtO Ac/Hex) to obtain the desired product 2-methyl-3-nitropyridine (30.5g, isolated yield 70percent) (Note: isolated yield 42percent was obtained when the reaction was refluxed for 24 h).
Reference: [1] Tetrahedron Letters, 2000, vol. 41, # 32, p. 6237 - 6240
[2] Patent: WO2008/115369, 2008, A2, . Location in patent: Page/Page column 117
[3] Patent: WO2004/104001, 2004, A2, . Location in patent: Page 41
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  • [ 13061-96-6 ]
  • [ 584-08-7 ]
  • [ 18699-87-1 ]
Reference: [1] Patent: US5869676, 1999, A,
  • 13
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Reference: [1] Journal of Organic Chemistry, 2003, vol. 68, # 14, p. 5534 - 5539
  • 14
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  • [ 823-96-1 ]
  • [ 68-12-2 ]
  • [ 18699-87-1 ]
  • [ 5028-23-9 ]
Reference: [1] Tetrahedron Letters, 2000, vol. 41, # 32, p. 6237 - 6240
  • 15
  • [ 5470-18-8 ]
  • [ 4214-75-9 ]
YieldReaction ConditionsOperation in experiment
97% at 90℃; for 16 h; Sealed tube 3-Nitropyridin-2-amine (1): 2-chloro-3-nitropyridine (4 g, 25.23 mmol) was taken in a sealed tube and aqueous NH3 (8.57 g, 504.6 mmol) was added. The reaction mixture was heated to 90 °C and stirred for 16 h. The reaction mass was then cooled to 0 °C and filtered to obtain 1 (3.4 g, 97percent) as a yellow solid. 1HNMR (400 MHz, DMSO-d6): δ 6.74 (m, 1H), 7.87 (s, 2H), 8.38 (m, 2H). MS m/z (M+H): 140.3
Reference: [1] Patent: WO2014/149164, 2014, A1, . Location in patent: Paragraph 001189
[2] Journal of Heterocyclic Chemistry, 1986, vol. 23, # 3, p. 669 - 672
[3] Bioorganic and Medicinal Chemistry Letters, 2008, vol. 18, # 5, p. 1696 - 1701
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  • [ 4214-75-9 ]
Reference: [1] Journal of the Brazilian Chemical Society, 2010, vol. 21, # 8, p. 1439 - 1445
  • 17
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  • [ 6332-56-5 ]
Reference: [1] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 12, p. 3973 - 3977
  • 18
  • [ 5470-18-8 ]
  • [ 1480-87-1 ]
YieldReaction ConditionsOperation in experiment
77% With cesium fluoride In dimethyl sulfoxide at 90℃; for 4 h; General procedure: To a solution of 2,3-dichloropyridine(1.00 g, 6.76 mmol) in DMSO (33.8 ml) was added CsF (2.053 g, 13.51mmol) at room temperature. The mixture was stirred at 110 °C under air for 20h. The mixture was quenched with water at room temperature and extracted withEtOAc. The organic layer was separated, washed with water and brine, dried overNa2SO4 and concentrated in vacuo. The residue waspurified by column chromatography (silica gel, eluted with EtOAc in hexane) togive 3-chloro-2-fluoropyridine (0.639 g, 4.86 mmol, 71.9 percent) as colorlessoil. Thecompound 3B'-8B' were prepared in amanner similar to that described for 2B'.
Reference: [1] European Journal of Inorganic Chemistry, 2017, vol. 2017, # 2, p. 330 - 339
[2] Tetrahedron Letters, 2015, vol. 56, # 44, p. 6043 - 6046
[3] Heterocycles, 1986, vol. 24, # 11, p. 3213 - 3221
[4] Journal of Labelled Compounds and Radiopharmaceuticals, 2004, vol. 47, # 6, p. 373 - 383
[5] Tetrahedron, 2001, vol. 57, # 4, p. 739 - 750
[6] Journal of the American Chemical Society, 1959, vol. 81, p. 2674
[7] Heterocycles, 1992, vol. 34, # 8, p. 1507 - 1510
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  • [ 38240-29-8 ]
Reference: [1] Yakugaku Zasshi, 1958, vol. 78, p. 417,420[2] Chem.Abstr., 1958, p. 14622
[3] Patent: US2004/162285, 2004, A1,
[4] Patent: US2004/87577, 2004, A1, . Location in patent: Page 64
[5] Patent: US2004/167123, 2004, A1, . Location in patent: Page/Page column 97
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  • [ 59290-85-6 ]
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YieldReaction ConditionsOperation in experiment
58% With tert-butylhypochlorite; sodium carbonate; sodium chloride In dichloromethane at 25℃; for 20 h; Schlenk technique Weighing 3-nitropyridine-2-carboxylic acid (50.4 mg, 0.3 mmol),Sodium carbonate (64.0 mg, 0.6 mmol), NaCl (17.6 mg, 0.3 mmol), tert-butyl hypochlorite (32 μL, 0.3 mmol) into a 25 mL of Schlenk reaction bottle, Then CH2Cl2 (3 mL) was added and placed in a 25 °C oil bath for 20 h. After completion of the reaction, the solvent was removed under reduced pressure and eluted with petroleum ether / ethyl acetate.The solvent was separated on a silica gel column, The yield of 2-chloro-3-nitropyridine was 58percent.
Reference: [1] Patent: CN108586334, 2018, A, . Location in patent: Paragraph 0060-0062
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Reference: [1] Yakugaku Zasshi, 1944, vol. 64, # 4, p. 201[2] Chem.Abstr., 1951, p. 4717
[3] Journal of the Chemical Society, 1952, p. 2042,2044
[4] Journal of the Chemical Society, 1954, p. 4516,4520
[5] Gazzetta Chimica Italiana, 1963, vol. 93, p. 65,66,67,70
[6] Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 13, p. 3983 - 3987
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Reference: [1] Journal of Chemical Research - Part S, 1996, # 4, p. 194 - 195
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Reference: [1] Journal of Chemical Research - Part S, 1996, # 4, p. 194 - 195
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Reference: [1] Journal of Chemical Research - Part S, 1996, # 4, p. 194 - 195
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  • [ 5470-18-8 ]
Reference: [1] Russian Journal of General Chemistry, 2001, vol. 71, # 7, p. 1076 - 1087
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  • [ 5470-18-8 ]
Reference: [1] Chemical and Pharmaceutical Bulletin, 1988, vol. 36, p. 2244 - 2247
  • 27
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Reference: [1] Russian Journal of General Chemistry, 2001, vol. 71, # 7, p. 1076 - 1087
  • 28
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Reference: [1] Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 13, p. 3983 - 3987
  • 29
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  • [ 5470-18-8 ]
Reference: [1] Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1920, vol. 50, p. 476[2] Chem. Zentralbl., 1923, vol. 94, # III, p. 1020
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Reference: [1] Zhurnal Russkago Fiziko-Khimicheskago Obshchestva, 1920, vol. 50, p. 476[2] Chem. Zentralbl., 1923, vol. 94, # III, p. 1020
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YieldReaction ConditionsOperation in experiment
58.8 g at 120℃; for 16 h; Inert atmosphere under nitrogen atmosphere, in a three-necked flask of 2-chloro-3-nitropyridine 192.7Mg, dimethyl sulfoxide 1.0mL and copper cyanide 129.4mg was added.The resulting mixture was stirred at 120 ° C. for 16 hours.Saturated ammonium chloride aqueous solution and ethyl acetate were added to the resulting reaction mixture, and extraction was performed to obtain an organic layer and an aqueous layer.The obtained aqueous layer was extracted with ethyl acetate.The obtained organic layer and the obtained ethyl acetate layer were mixed and dried to obtain a solution containing 58.8 mg of 2-cyano-3-nitropyridine
Reference: [1] Patent: JP2015/209389, 2015, A, . Location in patent: Paragraph 0072
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  • [ 20265-35-4 ]
YieldReaction ConditionsOperation in experiment
90% at 0℃; for 4 h; A suspension of sodium methoxide (40.5 g, 0.750 mol) in 200 mL of methanol was slowly added to a solution of 2-chloro-3- nitro-pyridine (79.3 g, 0.500 mol) in 800 mL of methanol at 0 °C. The reaction mixture was stirred for 4 hours and then poured into 1000 g of ice. The resulting precipitate was filtered, washed with water, and dried to give 2-methoxy-3-nitro-pyridine (70. g, 0.45 mmol, 90 percent) as a white solid.
Reference: [1] Patent: WO2005/26137, 2005, A2, . Location in patent: Page/Page column 233
[2] Journal of the Chemical Society, 1954, p. 4516,4520
[3] Canadian Journal of Chemistry, 1953, vol. 31, p. 1181,1183,1186
[4] Magnetic Resonance in Chemistry, 1986, vol. 24, p. 507 - 511
[5] Tetrahedron, 1997, vol. 53, # 37, p. 12505 - 12524
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YieldReaction ConditionsOperation in experiment
75% With sodium methylate In methanol EXAMPLE 12
Synthesis of 2-methoxy-3-nitropyridine STR27
2-Chloro-3-nitropyridine (25 g, 0.157 mol) was suspended in methanol (300 ml) and sodium methoxide (17 g, 0.315 mol) was added.
The mixture was refluxed for 2 hr and part of the solvent removed under reduced pressure.
The reaction mixture was diluted with water (1 litre) and the precipitate collected by filtration.
The white solid obtained was washed with more water and dried under vacuum to give the title compound (18.2 g, 75percent).
1 H NMR (CDCl3): 8.42 (dd, J=5, 2 Hz, 1H); 8.28 (dd, J=8, 2 Hz, 1H); 7.06 (dd, J=8, 5 Hz, 1H); 4.13 (s, 3H)
Reference: [1] Patent: US5652363, 1997, A,
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Reference: [1] Organic Letters, 2009, vol. 11, # 22, p. 5142 - 5145
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  • [ 74-89-5 ]
  • [ 4093-88-3 ]
YieldReaction ConditionsOperation in experiment
100% at 80℃; for 8 h; Sealed tube To a solution of 3-nitro-2-chloropyridine (4.0 g, 25.2 mmol) in 15 mL 2-methoxyethanol was added methylamine (2.0 M in THF, 32 mL). The reactionwas stirred for 8 hr at 80 °C in a sealed tube. After cooling to rt, the reaction mixture was evaporated to afford 15 quantitatively (3.6 g, 23.2 mmol). 1H NMR (500 MHz, CDCl3) δ 8.47 – 8.37 (m, 2H), 8.20 (s, 1H), 6.64 (dd, J = 8.3, 4.4 Hz, 1H), 3.17 (d, J = 4.8 Hz, 3H). 13C NMR (126 MHz, CDCl3) δ 156.0, 153.5, 135.4, 111.7, 28.4. HRMS (ESI+) m/z calcd for C6H8N3O2+ 154.0617, found 154.0610.
98.5% at 0 - 20℃; for 3 h; Methylamine (33percent in EtOH) (1 10 mL, 883 mmol) was placed in a 500 mL three necked round bottom flask. It was cooled to 0 °C using ice bath. 2-chloro-3-nitropyridine (20 g, 126 mmol) was added to the above solution in portions as this is an exothermic reaction. After the addition was complete the reaction mixture was stirred for 2 h at 0 °C and later 1 h at room temperature. Solvent was concentrated and residue was taken in 500 mL of water and extracted with EtOAc 3 x 150 mL. Combine organic layer was dried over Na2SC"4, filtered and concentrated to give a bright orangish yellow solid(19 g , 98.5percent).
95.76% With triethylamine In dichloromethane at 20℃; for 5 h; 24 mL of methylamine, 39.5 mL of triethylamine was added to 240 mL of dichloromethane, and 30 g(0.18 mol) of 2-chloro-3-nitropyridine, and the reaction was completed at room temperature for 5 h. After completion of the reaction, the reaction solution was washed three times with waterInto anhydrous sodium sulfate in addition to water, suction filtration, steaming, yellow crystalline solid product 44.8g (yield 95.76percent).
86% With sodium acetate In water; acetonitrile at 20℃; Heating / reflux 2-chloro-3-nitropyridine 70.0 g, 0.44 mol) was dissolved in recently distilled acetonitrile (400 mL) under stirring. Sodium acetate (55.2 g, 0.67 mol) and 30percent aqueous solution of methylamine (111 mL) were added under vigorous stirring. The obtained suspension was stirred at room temperature for 30 min, refluxed for 1 h, and kept overnight at room temperature. The yellow reaction mixture was concentrated under reduced pressure to remove approximately 300 mL of the solvent. The residue was diluted with 20percent aqueous solution of K2CO3 (1 L) under stirring. The yellow precipitate was filtered off, washed with water (3° * 200 mL), and dried to afford W-Methyl-3-nitropyridin-2-amine in 86percent (58.14 g, 0.38 mol) yield as bright yellow crystals.

Reference: [1] Tetrahedron Letters, 2015, vol. 56, # 44, p. 6097 - 6099
[2] Patent: WO2012/121936, 2012, A2, . Location in patent: Page/Page column 93
[3] Patent: CN106831776, 2017, A, . Location in patent: Paragraph 0097; 0098; 0099
[4] European Journal of Organic Chemistry, 2009, # 22, p. 3753 - 3764
[5] Acta Chemica Scandinavica, 1993, vol. 47, # 8, p. 805 - 812
[6] Patent: WO2008/12622, 2008, A2, . Location in patent: Page/Page column 57
[7] Open Medicinal Chemistry Journal, 2018, vol. 12, # 1, p. 74 - 83
[8] Chemistry - A European Journal, 2017, vol. 23, # 57, p. 14173 - 14176
[9] Patent: US4520196, 1985, A,
[10] Bioorganic and Medicinal Chemistry Letters, 2008, vol. 18, # 5, p. 1696 - 1701
[11] Bioorganic and Medicinal Chemistry Letters, 2008, vol. 18, # 20, p. 5493 - 5496
  • 36
  • [ 5470-18-8 ]
  • [ 4093-88-3 ]
YieldReaction ConditionsOperation in experiment
98.5% With methylamine In ethanol; water Synthesis of N-methyl-3-nitropyridin-2-amine
Methylamine (33percent in EtOH) (110 mL, 883 mmol) was placed in a 500 mL three necked round bottom flask.
It was cooled to 0° C. using ice bath. 2-chloro-3-nitropyridine (20 g, 126 mmol) was added to the above solution in portions as this is an exothermic reaction.
After the addition was complete the reaction mixture was stirred for 2 h at 0° C. and later 1 h at room temperature.
Solvent was concentrated and residue was taken in 500 mL of water and extracted with EtOAc 3*150 mL.
Combine organic layer was dried over Na2SO4, filtered and concentrated to give a bright orangish yellow solid (19 g, 98.5percent).
Reference: [1] Patent: US2012/228583, 2012, A1,
  • 37
  • [ 5470-18-8 ]
  • [ 4093-88-3 ]
  • [ 33742-70-0 ]
Reference: [1] Patent: US5624935, 1997, A,
  • 38
  • [ 123-39-7 ]
  • [ 5470-18-8 ]
  • [ 4093-88-3 ]
Reference: [1] Journal of the Brazilian Chemical Society, 2010, vol. 21, # 8, p. 1439 - 1445
  • 39
  • [ 79-16-3 ]
  • [ 5470-18-8 ]
  • [ 4093-88-3 ]
Reference: [1] Journal of the Brazilian Chemical Society, 2010, vol. 21, # 8, p. 1439 - 1445
  • 40
  • [ 5470-18-8 ]
  • [ 25391-59-7 ]
Reference: [1] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 12, p. 3973 - 3977
  • 41
  • [ 5470-18-8 ]
  • [ 2789-25-5 ]
Reference: [1] Chemical Communications, 1998, # 15, p. 1519 - 1520
[2] Journal of the American Chemical Society, 2017, vol. 139, # 33, p. 11622 - 11628
  • 42
  • [ 5470-18-8 ]
  • [ 2789-25-5 ]
  • [ 84487-03-6 ]
Reference: [1] Liebigs Annalen der Chemie, 1991, # 9, p. 875 - 878
[2] Chemical Communications, 1998, # 15, p. 1519 - 1520
  • 43
  • [ 5470-18-8 ]
  • [ 1597-33-7 ]
Reference: [1] Heterocycles, 1986, vol. 24, # 11, p. 3213 - 3221
  • 44
  • [ 5470-18-8 ]
  • [ 4093-88-3 ]
  • [ 33742-70-0 ]
Reference: [1] Patent: US5624935, 1997, A,
  • 45
  • [ 5470-18-8 ]
  • [ 30458-68-5 ]
Reference: [1] Patent: US2011/319394, 2011, A1,
  • 46
  • [ 5470-18-8 ]
  • [ 21991-39-9 ]
Reference: [1] Patent: US2011/319394, 2011, A1,
  • 47
  • [ 109-01-3 ]
  • [ 5470-18-8 ]
  • [ 5028-17-1 ]
Reference: [1] Patent: WO2013/40215, 2013, A1,
[2] Patent: WO2018/75858, 2018, A1,
  • 48
  • [ 5470-18-8 ]
  • [ 25797-03-9 ]
Reference: [1] Synthetic Communications, 2007, vol. 37, # 13, p. 2187 - 2193
  • 49
  • [ 5470-18-8 ]
  • [ 17288-35-6 ]
Reference: [1] Organic Process Research and Development, 2011, vol. 15, # 5, p. 1040 - 1045
[2] Patent: WO2004/104001, 2004, A2,
  • 50
  • [ 5470-18-8 ]
  • [ 853685-35-5 ]
  • [ 17288-35-6 ]
Reference: [1] Organic Process Research and Development, 2011, vol. 15, # 5, p. 1040 - 1045
  • 51
  • [ 5470-18-8 ]
  • [ 17288-32-3 ]
Reference: [1] Organic Process Research and Development, 2011, vol. 15, # 5, p. 1040 - 1045
[2] Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 1, p. 339 - 342
[3] Patent: WO2004/104001, 2004, A2,
  • 52
  • [ 5470-18-8 ]
  • [ 32501-05-6 ]
Reference: [1] Synthetic Communications, 1981, vol. 11, # 9, p. 743 - 750
  • 53
  • [ 5470-18-8 ]
  • [ 53406-38-5 ]
  • [ 357263-41-3 ]
Reference: [1] Patent: US2002/61892, 2002, A1,
[2] Patent: US2002/119982, 2002, A1,
  • 54
  • [ 5470-18-8 ]
  • [ 111669-25-1 ]
Reference: [1] Chemical and Pharmaceutical Bulletin, 2001, vol. 49, # 11, p. 1406 - 1411
[2] Journal of Medicinal Chemistry, 1990, vol. 33, # 4, p. 1145 - 1151
[3] Patent: US9226970, 2016, B2,
  • 55
  • [ 5470-18-8 ]
  • [ 98-80-6 ]
  • [ 134896-35-8 ]
YieldReaction ConditionsOperation in experiment
97%
Stage #1: for 0.75 h;
Stage #2: With sodium carbonate In 1,2-dimethoxyethane; ethanol; water for 1.5 h; Heating / reflux
A 5 L round bottom flask fitted with a condenser, mechanical stirrer and a nitrogen inlet was charged with 152.3 g (0.96 mol) of 2-chloro-3-nitropyridine and 1.65 L of 1,2-dimethoxyethane. The solution was degassed by bubbling nitrgen through the solution for 10 min and 56.7 g (0.49 mol, 0.05 equiv) of tetrakis (tliphenylphosphine)-palladium (0) was added. The mixture was degassed for an additional 45 min during which time the catalyst dissolved leaving a clear dark red solution. A degassed solution of 180.3 g (1.48 mol, 1.54 equiv) of phenylboronic acid in 800 [ML] of absolute ethanol was added followed by 1.65 L of degassed 2M aqueous sodium carbonate solution. The cloudy mixture was heated to reflux, and refluxed for 1.5 h. While at reflux a yellow suspension formed. The suspension was cooled to ambient temperature, diluted with 1 L of ethyl acetate, and filtered through [CELITE THE] cake was washed with 2 L of ethyl acetate and the filtrate washed with water (2 x 3 L), saturated sodium bicarbonate solution [(1 X 3] L), and saturated sodium chloride solution (1 x 3 L). The organic layer was dried with magnesium sulfate, filtered and the filtrate concentrated. The residue was dissolved in 1.5 L of ether, washed with 2.5N [NAOH] (2 x 500 mL) and brine (500 mL). The solution was dried with magnesium sulfate, filtered through 400 g of silica and the cake washed with additional ethyl acetate. The filtrate was concentrated to an oil which was chromatographed [5 kg Silica Gel 60,70-230 mesh, hexanes/ethyl acetate 80: 20 (12 L), 75: 25 (8 L), 70: 30 (11 L) and 60: 40 (7 L) ]. The product fractions were concentrated yielding 188.0 g (97percent yield) of the title compound 2-phenyl-3-nitropyridine, as a pale yellow oil: [IH] NMR [(CDCL3)] 8 7.39-7. 49 (m, [4H),] 753-7.95 (m, 2H), 8.12 (m, 1H) 8.84 (m, [1H).] MS [(EI)] [M/Z] 200. Anal. Calcd for [CLLH8N204] : C, 66.00 ; H, 4.03 ; N, 13.99. Found: C, 66.19 ; H, 4.09 ; N, 13.98.
95.45% With tetrakis(triphenylphosphine) palladium(0); potassium carbonate In ethanol; water; toluene for 12 h; Reflux 2-chloro-3-nitro pyridine 25 g (157.6 mmol), phenylboronic acid 24.9 g (204.9 mmol), Pd (PPh3) 4 5.4 g (4.73 mmol), K2CO3 54.48 g (394.2 mmol), 150 mL of distilled water, toluene 300 mL, into a 100 mL ethanol was stirred under reflux. After 12 hours cooled to ambient temperature and add deionized water. Extracted with MC, and dried over anhydrous MgSO4. Reduced pressure to separate after the distillation column. Compound 4-1 30 g (149.85 mmol, 95.45percent) was obtained.
93% With palladium diacetate; potassium carbonate; triphenylphosphine In 1,4-dioxane; water for 24 h; Inert atmosphere; Reflux 5 g of 2-chloro-3-nitropyridine,4.7 g of benzene boronic acid,8.7 grams of potassium carbonate,0.1 g of palladium acetate,0.4 g of triphenylphosphine,60 ml of 1,4-dioxane / distilled water (3: 1) was added to a three-necked flask,Under nitrogen protection,Reflux stirring 24hAfter completion of the reaction,Add distilled water to the system,Until the solution becomes clear,And extracted with ethyl acetate,Saturated brine washing,Dried, concentrated, and chromatographed to give 6.0 g of a solid, 93percent yield.
Reference: [1] Bioorganic and Medicinal Chemistry Letters, 1996, vol. 6, # 9, p. 1015 - 1020
[2] Patent: WO2004/29024, 2004, A2, . Location in patent: Page 13-14
[3] Synthesis, 2012, vol. 2012, # 2, p. 290 - 296
[4] Patent: KR2015/141179, 2015, A, . Location in patent: Paragraph 0113-0115
[5] Journal of Organic Chemistry, 2003, vol. 68, # 24, p. 9412 - 9415
[6] Patent: CN106916170, 2017, A, . Location in patent: Paragraph 0067; 0068; 0069
[7] Applied Organometallic Chemistry, 2014, vol. 29, # 4, p. 244 - 246
[8] Tetrahedron Letters, 1991, vol. 32, # 20, p. 2273 - 2276
[9] Tetrahedron, 1992, vol. 48, # 37, p. 8117 - 8126
[10] Journal of the American Chemical Society, 2011, vol. 133, # 41, p. 16338 - 16341
[11] Organic Letters, 2011, vol. 13, # 22, p. 6102 - 6105
[12] Patent: WO2015/148344, 2015, A2, . Location in patent: Page/Page column 57; 58
[13] Patent: WO2008/101682, 2008, A2, . Location in patent: Page/Page column 85-86
  • 56
  • [ 5470-18-8 ]
  • [ 98-80-6 ]
  • [ 92-52-4 ]
  • [ 134896-35-8 ]
Reference: [1] Tetrahedron Letters, 2014, vol. 55, # 42, p. 5841 - 5845
  • 57
  • [ 5470-18-8 ]
  • [ 2789-25-5 ]
  • [ 84487-03-6 ]
Reference: [1] Liebigs Annalen der Chemie, 1991, # 9, p. 875 - 878
[2] Chemical Communications, 1998, # 15, p. 1519 - 1520
  • 58
  • [ 5470-18-8 ]
  • [ 141430-65-1 ]
Reference: [1] Journal of Medicinal Chemistry, 1992, vol. 35, # 13, p. 2496 - 2497
  • 59
  • [ 5470-18-8 ]
  • [ 143621-35-6 ]
Reference: [1] Tetrahedron, 1998, vol. 54, # 23, p. 6311 - 6318
[2] Tetrahedron, 1998, vol. 54, # 23, p. 6311 - 6318
  • 60
  • [ 5470-18-8 ]
  • [ 160590-40-9 ]
Reference: [1] Patent: WO2017/120429, 2017, A1,
  • 61
  • [ 5470-18-8 ]
  • [ 1826-67-1 ]
  • [ 357263-41-3 ]
YieldReaction ConditionsOperation in experiment
38%
Stage #1: at -78 - -20℃; Inert atmosphere
Stage #2: With water; ammonium chloride In tetrahydrofuran
2-Chloro-3-nitropyridine (10.0 g, 63.07 mmol) was dissolved in 500 mL anydrous THF and magnetically stirred at -78 °C. Excess vinylmagnesium bromide (1 M in THF, 200 mL, 200.0 mmol) was added dropwise, after the addition was complete, the solution was allowed to warm to -20 °C. After 16 h, an aqueous solution of saturated ammonium chloride (300 g/L, 150 mL, 841.25 mmol) was added dropwise under vigorous stirring. The resulting suspension was filtered over Hyflo Super Cel medium (calcined) and extracted with EtOAc ( .x. 3). The combined organic fractions were concentrated and automated flash chromatography (CH2Cl2/MeOH, 97:3 and then CH2Cl2/MeOH/NH4OH, 980:18.75:1.25) was used to obtain pure 43 (3.87 g, 38percent yield). 1H NMR (400 MHz, CDCl3) δ 8.73 (s, 1H), 8.04 (d, J = 5.5 Hz, 1H), 7.53-7.46 (m, 1H), 7.43 (dd, J = 6.2, 3.4 Hz, 1H), 6.64 (dd, J = 3.1, 2.1 Hz, 1H).
37% at -78 - -20℃; EXAMPLE 19: 4-(4-(7-Chloro-l-ethyl-l//-pyrrolo[2,3-c]pyridin-3-yl)pyrimidin-2-ylamino)phenol (Compound70); A solution of 2-chloro-3-nitropyridine (31.5 mmol) in dry THF (200 mL) was cooled to -78°C. Vinylmagnisium bromide (1.0 M in THF, 10OmL) was added dropwise under N2. The mixture was stirred at -78°C for lhr, followed by -200C for further 8 hrs. The mixture was quenched with 150 mL NH4Cl (20percent in H2O) and extracted with EtOAc (3xl50mL). The organic layers were combined, washed with brine, dried on MgSO4 and filtered. The solvent was evaporated and the residue was purified by column chromatography using EtOAc/PE (1:3, v/v) to elute 7- chloro-l/f-pyrrolo[2,3-c]pyridine as white solid (1.77 g, yield 37percent). 1H-NMR (DMSO-J6) δ: 6.63 (d, IH, J= 3.2 Hz, Ar-H), 7.58 (d, IH, J= 5.6 Hz, Ar-H), 7.66 (d, IH, J= 2.8 Hz, Ar-H), 7.90 (d, IH, J= 5.2 Hz, Ar-H). MS (ESI+) m/z 153.0260 (M+H)+.
37%
Stage #1: at -78 - -20℃; for 9 h; Inert atmosphere
Stage #2: With ammonium chloride In tetrahydrofuran; water
Example 19; 4-(4-(7-Chloro-1-ethyl-1H-pyrrolo[2,3-c]pyridin-3-yl)pyrimidin-2-ylamino)phenol (Compound 70) A solution of 2-chloro-3-nitropyridine (31.5 mmol) in dry THF (200 mL) was cooled to -78° C. Vinylmagnisium bromide (1.0 M in THF, 100 mL) was added dropwise under N2. The mixture was stirred at -78° C. for 1 hr, followed by -20° C. for further 8 hrs. The mixture was quenched with 150 mL NH4Cl (20percent in H2O) and extracted with EtOAc (3.x.150 mL). The organic layers were combined, washed with brine, dried on MgSO4 and filtered. The solvent was evaporated and the residue was purified by column chromatography using EtOAc/PE (1:3, v/v) to elute 7-chloro-1H-pyrrolo[2,3-c]pyridine as white solid (1.77 g, yield 37percent). 1H-NMR (DMSO-d6) δ: 6.63 (d, 1H, J=3.2 Hz, Ar-H), 7.58 (d, 1H, J=5.6 Hz, Ar-H), 7.66 (d, 1H, J=2.8 Hz, Ar-H), 7.90 (d, 1H, J=5.2 Hz, Ar-H). MS (ESI+) m/z 153.0260 (M+H)+.
37% at -78 - 25℃; for 14 h; To a solution of 2-chloro-3-nitropyridine (50 g, 315 mmol, 1.0 eq) in THF (1.5 L) was added dropwise vinylmagnesium bromide (1 M in THF, 946.14 mL, 3.00 eq) at -78 °C. After the addition was complete, the mixture was allowed to warm to 25 °C and stirred for 14 h. TLC (petroleum ether: ethyl acetate = 3:1, Rf = 0.25) showed that the reaction was complete. The reaction was quenched with saturated NH4Cl (400 mL) and extracted with EtOAc (500 mL x 3). The combined organic layer was concentrated and the residue was purified by silica gel column chromatography (petroleum ether: ethyl acetate = 2:1 to 1:1) to give 7-chloropyrrolo[2,3-c]pyridine (18 g, 118 mmol, 37percent yield) as a yellow solid. 1H NMR (400 MHz CDCl3) = 8.72 (br s, 1H), 8.07 (d, J = 5.6 Hz, 1H), 7.52 (d, J = 5.6 Hz, 1H), 7.46 - 7.44 (m, 1H), 6.66 (t, J = 2.8 Hz, 1H). ESI-MS( m/z): 153.1(M+H)+
36.45%
Stage #1: at -78 - -20℃; for 10 h; Inert atmosphere
Stage #2: With ammonium chloride In tetrahydrofuran; water
A solution of 2-chloro-3-nitropyridine (1 g, 6.3 mmol) in dry tetrahydrofuran (100 mL) was treated with vinyl magnesium bromide (60 mL, 60 mmol) at -78 °C in a drop-wise manner under inert atmosphere. The resulting reaction mixture was stirred at the same temperature for 2 hours followed by stirring at -20 °C for 8 hours. The reaction was quenched slowly with aqueous ammonium chloride solution (20 mL), extracted with ethyl acetate (3 x 50 mL) and the combined organic layer dried over anhydrous sodium sulfate, filtered and concentrated. The crude product was purified by silica gel (100-200) column chromatography using ethyl acetate and hexane gradient elution to afford 7-chloro-1 H-pyrrolo[2,3-c]pyridine (0.350 g, 36.45percent).1H NMR (400 MHz, CHCI3-cf): δ 8.04 (d, J=5.46 Hz, 1 H), 7.50 (dd, J=5.46, 0.75 Hz, 1 H) 7.43 (dd, J=3.1 1 , 2.54 Hz, 1 H), 6.64 (dd, J=3.14, 2.07 Hz, 1 H). MS: 152.98 (M+).
36.45% at -78 - -20℃; for 10 h; Inert atmosphere A solution of 2-chloro-3-nitropyridine (1 g, 6.3 mmol) in dry tetrahydrofuran (100 mL) was treated with vinyl magnesium bromide (60 mL, 60 mmol) at -78° C. in a drop-wise manner under inert atmosphere. The resulting reaction mixture was stirred at the same temperature for 2 hours followed by stirring at -20° C. for 8 hours. The reaction was quenched slowly with aqueous ammonium chloride solution (20 mL), extracted with ethyl acetate (3*50 mL) and the combined organic layer dried over anhydrous sodium sulfate, filtered and concentrated. The crude product was purified by silica gel (100-200) column chromatography using ethyl acetate and hexane gradient elution to afford 7-chloro-1H-pyrrolo[2,3-c]pyridine (0.350 g, 36.45percent). 1H NMR (400 MHz, CHCl3-d): δ 8.04 (d, J=5.46 Hz, 1H), 7.50 (dd, J=5.46, 0.75 Hz, 1H) 7.43 (dd, J=3.11, 2.54 Hz, 1H), 6.64 (dd, J=3.14, 2.07 Hz, 1H). MS: 152.98 (M+).
31% at -78 - -20℃; for 13 h; Typical procedure for preparing azaindole from nitropyridine: Preparation of 7-chloro-6-azaindole, Precursor 2a, is an example of Step A of Scheme 1. 2-chloro-3-nitropyridine (5.0 g, 31.5 mmol) was dissolved in dry THF (200 mL). After the solution was cooled to -78° C., vinyl magnesium bromide (1.0M in THF, 100 mL) was added dropwise. The reaction temperature was maintained at -78° C. for 1 h, and then at -20° C. for another 12 h before it was quenched by addition of 20percent NH4Cl aqueous solution (150 mL). The aqueous phase was extracted with EtOAc (3.x.150 mL). The combined organic layer was dried over MgSO4, filtered and the filtrate was concentrated in vacuo to give a residue which was purified by silica gel column chromatography (EtOAc/Hexane, 1/10) to afford 1.5 g (31percent) of 7-chloro-6-azaindole, Precursor 2a. 1H NMR (500 MHz, CD3OD) δ7.84 (d, 1H, J=10.7 Hz), 7.55 (dd, 1H, J=10.9, 5.45 Hz), 6.62 (d, 1H, J=5.54 Hz), 4.89 (s, 1H). MS m/z: (M+H)+ calcd for C7H6ClN2: 153.02; found 152.93. HPLC retention time: 0.43 minutes (column A).
31%
Stage #1: at -20℃; for 8 h;
Stage #2: With water; ammonium chloride In tetrahydrofuran
Preparation of azaindole, Method A: Preparation of 7-Chloro-6-azaindole 1e: 2-Chloro-3-nitropyridine 22e (5.0 g) was dissolved in dry THF (200 ml). After the solution was cooled down to -78° C., an excess of vinyl magnesium bromide (1.0 M in THF, 100 ml) was added. Then, the reaction was left at -20° C. for eight hours before being quenched with 20percent NH4Cl (150 ml). The aqueous phase was extracted with EtOAc (3.x.150 ml). The combined organic layer was dried over MgSO4. After filtration and concentration, the crude product was purified by silica gel column chromatography to afford 1.5 g of 7-chloro-6-azaindole 1e in 31percent yield.
28%
Stage #1: at 0℃; for 1.33333 h; Inert atmosphere
Stage #2: With ammonium chloride In tetrahydrofuran; water
To a 1L three-necked flask under nitrogen is added commercially available vinylmagnesium bromide solution (1 M in THF, 500 mL, 500 mmol). At 0 °C a solution of of 2-chloro-3-nitro- pyridine (25 g, 160 mmol) in THF (100 mL) is added dropwise via addition funnel over 40 minutes. After stirring an additional 40 minutes at 0 °C the reaction is quenched with aqueous saturated NH4Cl solution and extracted with EtOAc. The combined organic layers are dried over MgS04, filtered and concentrated in vacuo. The crude material is passed through a plug of silica gel with CH2Cl2/heptanes (33percent) as eluant to give a solid that is recrystallized from CH2Cl2/heptanes to deliver 6.9 g (28percent) of the titled product as a beige solid mp 182- 185 0 C. 1H NMR (CDCI3) δ 8.60 (br s, 1H), 8.05 (m, 1H), 7.50 (m, 1H), 7.42 (m, 1H), 6.64 (m, 1H). LCMS m/z: 153 (M+H).
26%
Stage #1: at -78 - -20℃; for 8 h;
Stage #2: With water; ammonium chloride In tetrahydrofuran
To a solution of 2-chloro-3-nitropyridine (5g, 31 .Smmol)) in THF (200mL) at -78°C, was added vinylmagnesium bromide (lOOmL, l.OM in THF) The reaction mixturewas stirred at -20°C for 8 hours, quenched with NHUC1 solution (20percent, 150mL), extractedwith EtOAc, dried over anhydrous Na2SC>4 and concentrated. The residue was purified by\\flash chromatography, eluent EtOAc/hexane (1:5), to afford the title compound 259 (1.23g,26percent yield) as a white solid FZ. Zhang, et al.. J. Ore. Chem., 2002. 67. 2345-23471. MS(m/z): 153.1(M+H) (found).
353 mg at -78 - -30℃; for 0.5 h; To a solution of 2-chloro-3-nitropyridine (1 g) in THF (30mL) cooled at -78°C was slowly added vinylmagnesium bromide (1 M in THF, 20.2ml_). The reaction mixture was warmed up to -30°C and was stirred at -30°C for 30min. Sat. NH4CI was added and the mixture was extracted with EA twice. The combined org. layers were dried (Na2S04) and evaporated in vacuo. CC (Biotage, SNAP 50g cartridge, solvent A: Hept; solvent B: EA; gradient in percentB: 8 for 4CV, 8 to 66 over 10CV, 66 for 2CV) afforded 353mg of rosa solid. LC-MS (B): tR = 0.47 min; [M+H]+: 153.22.
353 mg at -78 - -30℃; for 0.5 h; To a solution of 2-chloro-3-nitropyridine (1 g) in THF (30 mL) cooled at −78° C. was slowly added vinylmagnesium bromide (1 M in THF, 20.2 mL). The reaction mixture was warmed up to −30° C. and was stirred at −30° C. for 30 min. Sat. NH4Cl was added and the mixture was extracted with EA twice. The combined org. layers were dried (Na2SO4) and evaporated in vacuo. CC (Biotage, SNAP 50 g cartridge, solvent A: Hept; solvent B: EA; gradient in percent B: 8 for 4CV, 8 to 66 over 10CV, 66 for 2CV) afforded 353 mg of rosa solid. LC-MS (B): tR=0.47 min; [M+H]+: 153.22.

Reference: [1] Journal of Medicinal Chemistry, 2014, vol. 57, # 10, p. 4009 - 4022
[2] European Journal of Medicinal Chemistry, 2011, vol. 46, # 10, p. 5086 - 5098
[3] Patent: WO2010/51781, 2010, A1, . Location in patent: Page/Page column 48
[4] Patent: US2011/263541, 2011, A1, . Location in patent: Page/Page column 35
[5] Patent: WO2017/120429, 2017, A1, . Location in patent: Page/Page column 258
[6] Patent: WO2012/160464, 2012, A1, . Location in patent: Page/Page column 59
[7] Patent: US2014/155398, 2014, A1, . Location in patent: Paragraph 0361
[8] Journal of Organic Chemistry, 2002, vol. 67, # 7, p. 2345 - 2347
[9] Journal of Medicinal Chemistry, 2012, vol. 55, # 22, p. 9531 - 9540
[10] Patent: US2004/110785, 2004, A1, . Location in patent: Page 76-77
[11] Journal of Organic Chemistry, 2008, vol. 73, # 5, p. 1888 - 1897
[12] Patent: US2005/209246, 2005, A1, . Location in patent: Page/Page column 24
[13] Patent: WO2011/78984, 2011, A1, . Location in patent: Page/Page column 54
[14] Patent: WO2006/10264, 2006, A1, . Location in patent: Page/Page column 199-200
[15] Patent: US2005/261296, 2005, A1,
[16] Patent: US2004/63744, 2004, A1, . Location in patent: Page/Page column 30
[17] Patent: WO2010/42337, 2010, A1, . Location in patent: Page/Page column 38; 39
[18] Patent: WO2013/114332, 2013, A1, . Location in patent: Page/Page column 113
[19] Patent: US2014/371204, 2014, A1, . Location in patent: Paragraph 0814
[20] Patent: CN108524504, 2018, A, . Location in patent: Paragraph 0009
  • 62
  • [ 5470-18-8 ]
  • [ 53406-38-5 ]
  • [ 357263-41-3 ]
Reference: [1] Patent: US2002/61892, 2002, A1,
[2] Patent: US2002/119982, 2002, A1,
  • 63
  • [ 5470-18-8 ]
  • [ 3536-96-7 ]
  • [ 357263-41-3 ]
Reference: [1] Marine Drugs, 2015, vol. 13, # 1, p. 460 - 492
  • 64
  • [ 5470-18-8 ]
  • [ 295327-27-4 ]
Reference: [1] Tetrahedron Letters, 2011, vol. 52, # 41, p. 5292 - 5296
[2] Patent: US2016/159808, 2016, A1,
[3] Journal of Medicinal Chemistry, 2017, vol. 60, # 18, p. 7677 - 7702
  • 65
  • [ 5470-18-8 ]
  • [ 301220-34-8 ]
Reference: [1] Bioorganic and Medicinal Chemistry Letters, 2005, vol. 15, # 8, p. 2129 - 2134
  • 66
  • [ 5470-18-8 ]
  • [ 861673-68-9 ]
Reference: [1] Journal of Medicinal Chemistry, 2013, vol. 56, # 4, p. 1704 - 1714
[2] European Journal of Medicinal Chemistry, 2018, vol. 158, p. 302 - 310
  • 67
  • [ 5470-18-8 ]
  • [ 870544-59-5 ]
Reference: [1] Journal of Medicinal Chemistry, 2013, vol. 56, # 4, p. 1704 - 1714
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