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Chemical Structure| 6398-87-4 Chemical Structure| 6398-87-4

Structure of 6398-87-4

Chemical Structure| 6398-87-4

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Product Details of [ 6398-87-4 ]

CAS No. :6398-87-4
Formula : C9H11NO2
M.W : 165.19
SMILES Code : NC1=CC=CC(C2OCCO2)=C1
MDL No. :MFCD00272236
InChI Key :SPLTWZBWXIJQME-UHFFFAOYSA-N
Pubchem ID :7020362

Safety of [ 6398-87-4 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Computational Chemistry of [ 6398-87-4 ] Show Less

Physicochemical Properties

Num. heavy atoms 12
Num. arom. heavy atoms 6
Fraction Csp3 0.33
Num. rotatable bonds 1
Num. H-bond acceptors 2.0
Num. H-bond donors 1.0
Molar Refractivity 45.48
TPSA ?

Topological Polar Surface Area: Calculated from
Ertl P. et al. 2000 J. Med. Chem.

44.48 Ų

Lipophilicity

Log Po/w (iLOGP)?

iLOGP: in-house physics-based method implemented from
Daina A et al. 2014 J. Chem. Inf. Model.

1.66
Log Po/w (XLOGP3)?

XLOGP3: Atomistic and knowledge-based method calculated by
XLOGP program, version 3.2.2, courtesy of CCBG, Shanghai Institute of Organic Chemistry

0.65
Log Po/w (WLOGP)?

WLOGP: Atomistic method implemented from
Wildman SA and Crippen GM. 1999 J. Chem. Inf. Model.

1.0
Log Po/w (MLOGP)?

MLOGP: Topological method implemented from
Moriguchi I. et al. 1992 Chem. Pharm. Bull.
Moriguchi I. et al. 1994 Chem. Pharm. Bull.
Lipinski PA. et al. 2001 Adv. Drug. Deliv. Rev.

0.93
Log Po/w (SILICOS-IT)?

SILICOS-IT: Hybrid fragmental/topological method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

1.51
Consensus Log Po/w?

Consensus Log Po/w: Average of all five predictions

1.15

Water Solubility

Log S (ESOL):?

ESOL: Topological method implemented from
Delaney JS. 2004 J. Chem. Inf. Model.

-1.58
Solubility 4.37 mg/ml ; 0.0264 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Very soluble
Log S (Ali)?

Ali: Topological method implemented from
Ali J. et al. 2012 J. Chem. Inf. Model.

-1.16
Solubility 11.4 mg/ml ; 0.0692 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Very soluble
Log S (SILICOS-IT)?

SILICOS-IT: Fragmental method calculated by
FILTER-IT program, version 1.0.2, courtesy of SILICOS-IT, http://www.silicos-it.com

-2.11
Solubility 1.28 mg/ml ; 0.00776 mol/l
Class?

Solubility class: Log S scale
Insoluble < -10 < Poorly < -6 < Moderately < -4 < Soluble < -2 Very < 0 < Highly

Soluble

Pharmacokinetics

GI absorption?

Gatrointestinal absorption: according to the white of the BOILED-Egg

High
BBB permeant?

BBB permeation: according to the yolk of the BOILED-Egg

Yes
P-gp substrate?

P-glycoprotein substrate: SVM model built on 1033 molecules (training set)
and tested on 415 molecules (test set)
10-fold CV: ACC=0.72 / AUC=0.77
External: ACC=0.88 / AUC=0.94

Yes
CYP1A2 inhibitor?

Cytochrome P450 1A2 inhibitor: SVM model built on 9145 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.83 / AUC=0.90
External: ACC=0.84 / AUC=0.91

No
CYP2C19 inhibitor?

Cytochrome P450 2C19 inhibitor: SVM model built on 9272 molecules (training set)
and tested on 3000 molecules (test set)
10-fold CV: ACC=0.80 / AUC=0.86
External: ACC=0.80 / AUC=0.87

No
CYP2C9 inhibitor?

Cytochrome P450 2C9 inhibitor: SVM model built on 5940 molecules (training set)
and tested on 2075 molecules (test set)
10-fold CV: ACC=0.78 / AUC=0.85
External: ACC=0.71 / AUC=0.81

No
CYP2D6 inhibitor?

Cytochrome P450 2D6 inhibitor: SVM model built on 3664 molecules (training set)
and tested on 1068 molecules (test set)
10-fold CV: ACC=0.79 / AUC=0.85
External: ACC=0.81 / AUC=0.87

No
CYP3A4 inhibitor?

Cytochrome P450 3A4 inhibitor: SVM model built on 7518 molecules (training set)
and tested on 2579 molecules (test set)
10-fold CV: ACC=0.77 / AUC=0.85
External: ACC=0.78 / AUC=0.86

No
Log Kp (skin permeation)?

Skin permeation: QSPR model implemented from
Potts RO and Guy RH. 1992 Pharm. Res.

-6.85 cm/s

Druglikeness

Lipinski?

Lipinski (Pfizer) filter: implemented from
Lipinski CA. et al. 2001 Adv. Drug Deliv. Rev.
MW ≤ 500
MLOGP ≤ 4.15
N or O ≤ 10
NH or OH ≤ 5

0.0
Ghose?

Ghose filter: implemented from
Ghose AK. et al. 1999 J. Comb. Chem.
160 ≤ MW ≤ 480
-0.4 ≤ WLOGP ≤ 5.6
40 ≤ MR ≤ 130
20 ≤ atoms ≤ 70

None
Veber?

Veber (GSK) filter: implemented from
Veber DF. et al. 2002 J. Med. Chem.
Rotatable bonds ≤ 10
TPSA ≤ 140

0.0
Egan?

Egan (Pharmacia) filter: implemented from
Egan WJ. et al. 2000 J. Med. Chem.
WLOGP ≤ 5.88
TPSA ≤ 131.6

0.0
Muegge?

Muegge (Bayer) filter: implemented from
Muegge I. et al. 2001 J. Med. Chem.
200 ≤ MW ≤ 600
-2 ≤ XLOGP ≤ 5
TPSA ≤ 150
Num. rings ≤ 7
Num. carbon > 4
Num. heteroatoms > 1
Num. rotatable bonds ≤ 15
H-bond acc. ≤ 10
H-bond don. ≤ 5

1.0
Bioavailability Score?

Abbott Bioavailability Score: Probability of F > 10% in rat
implemented from
Martin YC. 2005 J. Med. Chem.

0.55

Medicinal Chemistry

PAINS?

Pan Assay Interference Structures: implemented from
Baell JB. & Holloway GA. 2010 J. Med. Chem.

0.0 alert
Brenk?

Structural Alert: implemented from
Brenk R. et al. 2008 ChemMedChem

1.0 alert: heavy_metal
Leadlikeness?

Leadlikeness: implemented from
Teague SJ. 1999 Angew. Chem. Int. Ed.
250 ≤ MW ≤ 350
XLOGP ≤ 3.5
Num. rotatable bonds ≤ 7

No; 1 violation:MW<1.0
Synthetic accessibility?

Synthetic accessibility score: from 1 (very easy) to 10 (very difficult)
based on 1024 fragmental contributions (FP2) modulated by size and complexity penaties,
trained on 12'782'590 molecules and tested on 40 external molecules (r2 = 0.94)

1.71

Application In Synthesis of [ 6398-87-4 ]

* 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.

  • Downstream synthetic route of [ 6398-87-4 ]

[ 6398-87-4 ] Synthesis Path-Downstream   1~35

  • 1
  • [ 6398-87-4 ]
  • [ 41607-95-8 ]
  • 3-(2-methoxy-phenyl)-3-oxo-propionic acid-(3-[1,3]dioxolan-2-yl-anilide) [ No CAS ]
  • 2
  • [ 6398-87-4 ]
  • [ 33813-31-9 ]
  • 4-[(3-[1,3]dioxolan-2-yl-phenylcarbamoyl)-acetyl]-benzoic acid [ No CAS ]
  • 3
  • [ 6398-87-4 ]
  • [ 141-97-9 ]
  • [ 643743-35-5 ]
  • 4
  • [ 6398-87-4 ]
  • [ 94-02-0 ]
  • 3-oxo-3-phenyl-propionic acid-(3-[1,3]dioxolan-2-yl-anilide) [ No CAS ]
  • 5
  • [ 6398-87-4 ]
  • [ 2881-63-2 ]
  • 3-(4-chloro-phenyl)-3-oxo-propionic acid-(3-[1,3]dioxolan-2-yl-anilide) [ No CAS ]
  • 6
  • [ 6398-87-4 ]
  • [ 2881-83-6 ]
  • 3-(4-methoxy-phenyl)-3-oxo-propionic acid-(3-[1,3]dioxolan-2-yl-anilide) [ No CAS ]
  • 7
  • [ 6952-67-6 ]
  • [ 6398-87-4 ]
YieldReaction ConditionsOperation in experiment
97% With palladium 10% on activated carbon; hydrogen; In methanol; at 20℃; for 4h; A mixture of compound 3 (1.95 g, 0.01 mol) and Pd/C (0.1 g,10%) in 50 mL methanol was stirred under hydrogen at room temperaturefor 4 h. The reaction mixture was filtered and the filtratewas evaporated to afford compound 4, a yellow oil with 97% yield,MS (ESI) m/z: 166 (M+ H)+. The 1H NMR spectrum was in accordancewith that described in the literature.42
82.7% With iron; ammonium chloride; In ethanol; water; at 80℃; for 0.5h; Compound 16b (6.45 g, 33.1 mmol) was dissolved in a mixed solvent of ethanol (50 mL) and water (25 mL) at room temperature.Ammonium chloride (885.4 mg, 16.55 mmol) and iron powder (9.27 g, 165.5 mmol) were added and reacted at 80 C for about 30 minutes.After the TLC was used to detect the completion of the reaction, the mixture was filtered while hot, and the filtrate was evaporated under reduced pressure.The organic phase was combined, washed with brine, dried over anhydrous magnesium sulfateThe yellow liquid compound 16c was obtained in an amount of 4.52 g, yield 82.7%.
55% With palladium on activated charcoal; hydrogen; In ethanol; at 20℃; Step 10b. 3-(1,3-Dioxolan-2-yl)aniline (compound 8003) A mixture of 8002 (215 mg, 1.1 mmol), Pd/C (100 mg, 50%) in ethanol (10 mL) was stirred under hydrogen at room temperature overnight. The mixture was filtered and the filtrate was evaporated in vacuo. The crude product was purified by column chromatography (hexanes/ethyl acetate: 8/1) to afford compound 8003 as a yellow solid (100 mg, 55%). LCMS: m/z 166.1 [M+1]+. 1H NMR (400 MHz, DMSO-d6): δ 3.86-4.03 (m, 4H), 5.10 (s, 1H), 5.55 (s, 1H), 6.54 (d, J=7.6 Hz, 2H), 6.63 (s, 1H), 6.99 (t, J=7.6 Hz, 1H).
With hydrogen;palladium on activated charcoal; In ethanol; for 4h; For compound (163) the commercially 3-nitrobenzaldehyde was converted to the cyclic acetal, 2-(3-nitro-phenyl)-[1,3]dioxolane using ethylene glycol and TsOH in refluxing benzene under Dean-Stark conditions. The nitro group of the 1.0 dioxolane was then reduced via H2 Pd/C reduction in EtOH (See above compound 42) for 4 hrs to give the phenylamine, 3-[1,3]dioxolan-2-yl-phenylamine. The phenylamine was alkylated with 2 eq 3-chloro-1,2-propanediol in EtOH using K2CO3 at RT (See above compound 41) for 48 hr. (to give 3-[(2,3-dihydroxy-propyl)-(3-[1,3]dioxolan-2-yl-phenyl)-amino]-propane-1,2-diol. The cyclic acetal of this dioxolane deprotected using 1 M HCl in THF for 20 min to give 3-[bis-(2,3-dihydroxy-propyl)-amino]-benzaldehyde. This aldehyde was coupled with the respective hydrazine to give the hydrazone under conditions given in Example 5;
With hydrazine hydrate; In methanol; for 1h;Reflux; A mixture of the nitro compound 3 (6.5 mmol), hydrazine hydrate(18.5 mmol) and Raney nickel (356 mg) in methanol (25.0 mL)was heated under reflux for 1 h. The hot solution was filtered andevaporated under reduced pressure. After cooling, the oil wasfiltered through a pad of silica gel for purification.4.2.2.1. 3-(1,3-Dioxolan-2-yl)aniline 4. Yellow oil; 89% yield. FTIR (ATR) ν (cm-1): 3365 and 3226 (NH2), 1625 (C=C), 1316(=C-N), 1092 and 1070 (C-O-C). 1H NMR (400 MHz, DMSO-d6) δ ppm 3.86-4.02 (m, 4H, H4', H5'), 5.09 (s, 2H, NH2), 5.56 (s, 1H, H20),6.53-6.59 (m, 2H, H4, H6), 6.66 (d, J = 1.7 Hz, 1H, H2), 7.01 (t,J = 7.7 Hz, 1H, H5). MS (70 eV) m/z (%): 165/166 [M+] (100/11), 164(49), 120 (26), 93 (40), 73 (23).
With iron; ammonium chloride; In ethanol; water; at 80℃; for 1h; General procedure: A slurry of nitro-compound (1.0 equiv.), iron powder (5.0 equiv.)and ammonium chloride (0.5 equiv.) in EtOH/H2O (3:1) was heated at 80 C for 1 h. The mixture was filtered through celite. The filtrate was extracted with EA. The combined organic layers were washed with brine, dried over anhydrous Na2SO4. The solvent was evaporated and the crude product was charged on a silica gel column chromatographyto afford amine in high yield.

  • 8
  • Benzhydrylidene-(3-[1,3]dioxolan-2-yl-phenyl)-amine [ No CAS ]
  • [ 6398-87-4 ]
  • 9
  • [ 6398-87-4 ]
  • 3-<4-ethoxycarbonyl-phenyl>-3-oxo-propionic acid ethyl ester [ No CAS ]
  • 4-[(3-[1,3]dioxolan-2-yl-phenylcarbamoyl)-acetyl]-benzoic acid ethyl ester [ No CAS ]
  • 10
  • [ 6398-87-4 ]
  • 3-oxo-3-<2-phenoxy-phenyl>-propionic acid ethyl ester [ No CAS ]
  • 3-oxo-3-(2-phenoxy-phenyl)-propionic acid-(3-[1,3]dioxolan-2-yl-anilide) [ No CAS ]
  • 12
  • 2-(3-[1,3]dioxolan-2-yl-phenyl)-1,1,1,3,3,3-hexamethyl-disilazane [ No CAS ]
  • [ 6398-87-4 ]
  • 13
  • [ 6398-87-4 ]
  • [ 24424-99-5 ]
  • 3-([1,3]dioxolan-2-yl)phenylcarbamic acid tert-butyl ester [ No CAS ]
  • 14
  • [ 6398-87-4 ]
  • 2-(3-nitrenophenyl)-4,4,5,5-tetramethyl-4,5-dihydro-1H-imidazole-3-oxide-1-oxyl [ No CAS ]
  • 15
  • [ 6398-87-4 ]
  • [ 364038-63-1 ]
  • 16
  • [ 6398-87-4 ]
  • [ 364038-67-5 ]
  • 17
  • [ 6398-87-4 ]
  • 2-(3-azidophenyl)-4,4,5,5-tetramethyl-1-oxo-4,5-dihydroimidazolium-N(3)-oxide perchlorate [ No CAS ]
  • 18
  • [ 99-61-6 ]
  • 2-hydroxyamino-1-acetoxy-1-<3.4-dimethoxy-phenyl>-propane hydrochloride [ No CAS ]
  • [ 6398-87-4 ]
  • 20
  • [ 6398-87-4 ]
  • [ 96-24-2 ]
  • 3-[(2,3-dihydroxy-propyl)-(3-[1,3]dioxolan-2-yl-phenyl)-amino]-propane-1,2-diol [ No CAS ]
YieldReaction ConditionsOperation in experiment
With potassium carbonate; In ethanol; at 20℃; for 48h; For compound (163) the commercially 3-nitrobenzaldehyde was converted to the cyclic acetal, 2-(3-nitro-phenyl)-[1,3]dioxolane using ethylene glycol and TsOH in refluxing benzene under Dean-Stark conditions. The nitro group of the 1.0 dioxolane was then reduced via H2 Pd/C reduction in EtOH (See above compound 42) for 4 hrs to give the phenylamine, <strong>[6398-87-4]3-[1,3]dioxolan-2-yl-phenylamine</strong>. The phenylamine was alkylated with 2 eq 3-chloro-1,2-propanediol in EtOH using K2CO3 at RT (See above compound 41) for 48 hr. (to give 3-[(2,3-dihydroxy-propyl)-(3-[1,3]dioxolan-2-yl-phenyl)-amino]-propane-1,2-diol. The cyclic acetal of this dioxolane deprotected using 1 M HCl in THF for 20 min to give 3-[bis-(2,3-dihydroxy-propyl)-amino]-benzaldehyde. This aldehyde was coupled with the respective hydrazine to give the hydrazone under conditions given in Example 5;
  • 21
  • [ 6398-87-4 ]
  • [ 29921-57-1 ]
  • [ 161357-09-1 ]
YieldReaction ConditionsOperation in experiment
With potassium hydroxide; N-benzyl-N,N,N-triethylammonium chloride; a) 2-{N,N-Bis-[(1-methylethyl)-oxycarbonylmethyl]-3-aminophenyl}-1,3-dioxolan 165.19 g (1.00 mol) of 2-(3-aminophenyl)-1,3-dioxolan (CA 108 (15): 131815 r), 156.35 g (3.00 mol) of pulverized potassium hydroxide and 11.39 g (0.05 mol) of benzyltriethylammonium chloride are vigorously mechanically stirred under argon and heated to 80 C. 543.09 g (3.00 mol) of bromoacetic acid isopropyl ester is instilled in the suspension and the reaction mixture is stirred for about 8 hours at 80 C. Then, it is filtered, the filtrate is shaken out several times with concentrated aqueous sodium bicarbonate solution, the organic phase is dried on anhydrous magnesium sulfate, filtered and concentrated by evaporation in a vacuum. The residue is chromatographed on silica gel 60 (Merck) with methylene chloride/methanol. After concentration by evaporation, the product fractions yield a colorless oil. Yield: 288.69 g (79% of theory) Analysis (relative to anhydrous substance): C 62.45 H 7.45 N 3.83 O 26.27 Cld. C 62.39 H 7.53 N 3.84
  • 22
  • [ 99-61-6 ]
  • [ 6398-87-4 ]
  • [ 6952-67-6 ]
YieldReaction ConditionsOperation in experiment
100% With toluene-4-sulfonic acid; In ethylene glycol; benzene; A mixture of 3-nitrobenzaldehyde (100 g, 0.66 mole), ethylene glycol (49.3 g, 0.7 mole) and p-toluenesulfonic acid (0.8 g) and benzene (1 L) was heated at reflux with continuous removal of water via a Dean and Stark trap. After 4 hours, the mixture was cooled, filtered through a pad of neutral alumina and concentrated in vacuo to afford 2-(3-nitrophenyl)-1,3-dioxolane (130.4 g, 100%) as an amber oil used without further purification below. Step (b) 2-(3-Aminophenyl)-1,3-dioxolane
  • 23
  • [ 6398-87-4 ]
  • [ 75-36-5 ]
  • N-[3-(1,3-dioxolan-2-yl)phneyl]acetamide [ No CAS ]
  • [ 59755-25-8 ]
YieldReaction ConditionsOperation in experiment
85% With pyridine; In ethyl acetate; Pyridine (31.3 g, 0.4 mole) was added to the above cooled (ice bath) ethylacetate solution of 2-(3-aminophenyl)1,3-dioxolane followed by dropwise addition of acetyl chloride (31.1 g, 0.4 mole) in ethyl acetate (50 mL) over 45 minutes. The ice bath was removed and the mixture stirred at room temperature for 30 minutes before being washed with water and dried over magnesium sulfate. Evaporation of the solvent afford N-[3-(1,3-dioxolan-2-yl)phneyl]acetamide (58.2 g, 85%) as an amber oil used without further purification below. Step (d) N-(3-Formylphenyl)acetamide
  • 24
  • [ 64-17-5 ]
  • [ 6952-67-6 ]
  • [ 7439-89-6 ]
  • [ 6398-87-4 ]
YieldReaction ConditionsOperation in experiment
With ammonium chloride; In water; Preparation 118 To a mixture of 2-(3-nitrophenyl)-1,3-dioxolane (12.8g), ammonium chloride (1.75g), ethyl alcohol (100ml) and water (50ml) were added Celite (12.8g) and iron powder (11.0g) under stirring at 70C. The stirring was continued at reflux for 40 minutes. After cooling, the reaction mixture was diluted with ethyl acetate (250ml) and filtered through Celite. The filtrate was washed with saturated aqueous sodium hydrogen carbonate (200ml) and brine (100ml). The separated organic layer was dried over magnesium sulfate, decolored with activated carbon and filtered. The solvent was evaporated to give 3-(1,3-dioxolan-2-yl)aniline (9.76g) as oil. MS:166(M+1) NMR(DMSO, δ):3.8-4.1(4H,m). 5.10(2H,br s), 5.55(1H,s), 6.4-6.7(3H,m), 7.00(1H,t, J=7.7Hz)
  • 25
  • [ 6398-87-4 ]
  • [ 75-36-5 ]
  • [ 113260-07-4 ]
YieldReaction ConditionsOperation in experiment
90% With pyridine; In CH2Cl2; A solution of acetyl chloride (3.75 g, 0.048 mol, 3.4 mL) in CH2Cl2 (6.5 mL) was added dropwise over 15 min to an ice-bath chilled solution of <strong>[6398-87-4]3-[1,3]dioxolan-2-yl-phenylamine</strong> (7.18 g, 0.043 mol) and pyridine (3.40 g, 0.043 mol, 3.5 mL) in CH2Cl2 (85 mL). The solution was then brought to room temperature, stirred for 1 hr, and poured onto ice-water (60 mL). The phases were separated, and the organic layer washed with water, saturated NaHCO3, brine and dried with MgSO4. Removal of the solvent in vacuo afforded N-(3-[1,3]dioxolan-2-yl-phenyl)-acetamide (8.01 g, 90%). 1H NMR (CDCl3) δ2.08 (s, 3H), 4.03 (d of mult., ethylenedioxy), 5.71 (s, 1H), 7.17 (d, J=8 Hz, 1H), 7.26 (t, J=8 Hz, 1H), 7.53 (d, J=8 Hz, 1H), 7.62 (s, 1H), 8.32 (br s, 1H). 13C NMR (CDCl3) δ168.9, 138.8, 138.3, 129.1, 122.3, 120.8, 118.1, 103.5, 65.4, 24.4.
  • 26
  • [ 75-15-0 ]
  • [ 6398-87-4 ]
  • [ 1031239-30-1 ]
  • 27
  • [ 6398-87-4 ]
  • [ 87-13-8 ]
  • diethyl (((3-(1,3-dioxolan-2-yl)phenyl)amino)methylene)malonate [ No CAS ]
YieldReaction ConditionsOperation in experiment
100% at 115℃; for 12h;Neat (no solvent); A mixture of compounds 5 (Alfa Aesar) and 6 (Aldrich) was heated to 115C overnight in a 100 mL 1-neck round bottom flask fitted with a Dean-Stark trap, after which it was allowed to cool to room temperature. Rotary evaporation (lh/40C) removes most of the residual EtOH. The product, 7 (20.30 g, quantitative yield) is a thick oil that solidifies in time, in the freezer or after vigorous mortaring. Analysis (1H NMR) indicates that it is of high enough purity to be used as such in the next step. In Process assay: HPLCProduct LD. : 1H NMR.
  • 28
  • [ 6398-87-4 ]
  • [ 98-88-4 ]
  • [ 1152493-20-3 ]
  • 29
  • [ 99-61-6 ]
  • [ 107-21-1 ]
  • [ 6398-87-4 ]
YieldReaction ConditionsOperation in experiment
EXAMPLE 314-[3-([4-methyl-3-(trifluoromethyl)phenyl]carbamoyl}amino)benzyl]-amino}-1H-pyrazole-3-carboxamide trifluoroacetate Preparation of 1-(3-formylphenyl)-3-(4-methyl-3-trifuoromethylphenyl)urea The urea was prepared in the following manner: 3 g of 3-nitrobenzaldehyde (20 mmol), 3.4 ml of ethylene glycol (60 mmol) and 0.3 g of para-toluenesulfonic acid dissolved in 250 ml of toluene are boiled for 4 hours and the mixture is then poured into 100 ml of saturated sodium bicarbonate solution and extracted with twice 50 ml of ethyl acetate. The combined organic phases are washed with water, dried over sodium sulfate and evaporated under vacuum. The crude product is directly hydrogenated in 20 ml of THF in the presence of 160 mg of platinum oxide in a Parr flask. After hydrogenation for 4 hours at room temperature, the reaction mixture is filtered through Celite. To avoid any degradation, the aniline obtained is left dissolved in the THF at a concentration of 10 mmol/20 ml and used in this form for the formation of the urea. 2 ml of the aniline solution (1 mmol) are treated with 200 mg of 4-methyl-3-trifluoromethylphenyl isocyanate for 4 hours at room temperature. The mixture is poured into 100 ml of 10% HCl solution and extracted with twice 50 ml of ethyl acetate. The combined organic phases are washed with water, dried over sodium sulfate and evaporated under vacuum. 320 mg of expected product are isolated in the form of a solid. (quantitative yield) EIMS ([M+H]+): 323. RT=4.37 min (acetonitrile/water gradient from 30% to 90%-Method B).Preparation of Example 31:Example 31 was prepared according to the method described for Example 1, starting with 200 mg of resin (ii), 193 mg of urea (0.6 mmol, 3 eq.) and 66 mg of sodium cyanoborohydride (1 mmol; 5 eq.). After purification by preparative HPLC, 36.7 mg of product 31 are isolated. (yield=34%). EIMS ([M+H]+): 433. RT=4.64 min (acetonitrile/water gradient from 5% to 85%-Method B).
  • 30
  • [ 6398-87-4 ]
  • [ 51903-64-1 ]
  • [ 1026988-03-3 ]
YieldReaction ConditionsOperation in experiment
EXAMPLE 314-[3-([4-methyl-3-(trifluoromethyl)phenyl]carbamoyl}amino)benzyl]-amino}-1H-pyrazole-3-carboxamide trifluoroacetate Preparation of 1-(3-formylphenyl)-3-(4-methyl-3-trifuoromethylphenyl)urea The urea was prepared in the following manner: 3 g of 3-nitrobenzaldehyde (20 mmol), 3.4 ml of ethylene glycol (60 mmol) and 0.3 g of para-toluenesulfonic acid dissolved in 250 ml of toluene are boiled for 4 hours and the mixture is then poured into 100 ml of saturated sodium bicarbonate solution and extracted with twice 50 ml of ethyl acetate. The combined organic phases are washed with water, dried over sodium sulfate and evaporated under vacuum. The crude product is directly hydrogenated in 20 ml of THF in the presence of 160 mg of platinum oxide in a Parr flask. After hydrogenation for 4 hours at room temperature, the reaction mixture is filtered through Celite. To avoid any degradation, the aniline obtained is left dissolved in the THF at a concentration of 10 mmol/20 ml and used in this form for the formation of the urea. 2 ml of the aniline solution (1 mmol) are treated with 200 mg of 4-methyl-3-trifluoromethylphenyl isocyanate for 4 hours at room temperature. The mixture is poured into 100 ml of 10% HCl solution and extracted with twice 50 ml of ethyl acetate. The combined organic phases are washed with water, dried over sodium sulfate and evaporated under vacuum. 320 mg of expected product are isolated in the form of a solid. (quantitative yield) EIMS ([M+H]+): 323. RT=4.37 min (acetonitrile/water gradient from 30% to 90%-Method B).Preparation of Example 31:Example 31 was prepared according to the method described for Example 1, starting with 200 mg of resin (ii), 193 mg of urea (0.6 mmol, 3 eq.) and 66 mg of sodium cyanoborohydride (1 mmol; 5 eq.). After purification by preparative HPLC, 36.7 mg of product 31 are isolated. (yield=34%). EIMS ([M+H]+): 433. RT=4.64 min (acetonitrile/water gradient from 5% to 85%-Method B).
  • 31
  • [ 6398-87-4 ]
  • [ 138229-59-1 ]
  • [ 952479-77-5 ]
  • 33
  • [ 1257310-86-3 ]
  • [ 6398-87-4 ]
  • 34
  • [ 6398-87-4 ]
  • [ 30766-03-1 ]
  • [ 1262044-08-5 ]
  • [ 1262044-07-4 ]
YieldReaction ConditionsOperation in experiment
With 4-methyl-morpholine; HATU; In N,N-dimethyl-formamide; at 20℃; for 0.5h; Step 1: A solution of <strong>[6398-87-4]3-(1,3-dioxolan-2-yl)aniline</strong> (3.26 g, 19.7 mmol), 4-bromopicolinic acid (4.38 g, 21.7 mmol), (2-(7-Aza-1H-benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate (HATU) (8.99 g, 23.6 mmol), and N-methylmorpholine (2.6 mL, 23.6 mmol) in N,N-dimethylformamide was stirred at room temperature for 30 minutes. The solvent was removed under reduced pressure, and the residue was purified by flash chromatography (1:1 Hexanes/ethyl acetate) to afford a mixture of N-(3-(1,3-dioxolan-2-yl)phenyl)-4-bromopicolinamide acetal and the corresponding aldehyde (5.56 g, ~81% yield, contains ~15% aldehyde). M+1=349.1
  • 35
  • [ 6398-87-4 ]
  • [ 97511-05-2 ]
  • [ 13716-12-6 ]
  • [ 1353720-54-3 ]
YieldReaction ConditionsOperation in experiment
With sodium t-butanolate; In hexane; ethyl acetate; toluene; Synthesis of N-(3-(1,3-dioxolan-2-yl)phenyl)dibenzo[b,d]thiophen-4-amine A clean and dry 1000 ml round bottom flask equipped with a reflux condenser, magnetic stir bar, and thermometer with adapter was prepared and purged with nitrogen. A solution of 4-bromodibenzo[b,d]thiophene (RS-1-170, 10.7 g, 0.0407 mol) in anhydrous toluene (500.0 ml) was then prepared and transferred to the reaction flask via cannula. <strong>[6398-87-4]3-aminobenzaldehyde ethylene acetal</strong> (8.1 g, 0.0488 mol) was added by syringe. The reaction solution was purged with a strong nitrogen flow for 20 minutes. Sodium tert-butoxide (5.86 g, 0.0610 mol) and Pd2dba3 (1.10 g, 0.0012 mol) were then added manually, followed by the addition of tri-tert-butylphosphine (0.65 g, 0.0032 mol) in toluene (-10 ml) via syringe. The vessel was heated to reflux for approximately 2 hours. The reaction was then cooled to room temperature and filtered through a Celite and silica gel pad. Solvent was removed by rotary evaporation. The crude material was dissolved in a 2:1 hexane/ethyl acetate solution purified by flash column chromatography using a gradient elution system of ethyl acetate/hexane. This provided pure product confirmed by NMR.
 

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