1,2-Dichloroethane → Denifanstat

HRID 541275Notes

Reaction equation

HRID 541275 reaction equation
[CH:1]1([C:5]2[C:13]([C:14]3[NH:18][C:17]([CH3:19])=[N:16][N:15]=3)=[CH:12][C:8]([C:9]([OH:11])=O)=[C:7]([CH3:20])[CH:6]=2)[CH2:4][CH2:3][CH2:2]1.Cl.[NH:22]1[CH2:27][CH2:26][CH:25]([C:28]2[CH:35]=[CH:34][C:31]([C:32]#[N:33])=[CH:30][CH:29]=2)[CH2:24][CH2:23]1.C(Cl)CCl.C1C=CC2N(O)N=NC=2C=1.CCN(C(C)C)C(C)C>CN(C=O)C>[CH:1]1([C:5]2[C:13]([C:14]3[NH:18][C:17]([CH3:19])=[N:16][N:15]=3)=[CH:12][C:8]([C:9]([N:22]3[CH2:27][CH2:26][CH:25]([C:28]4[CH:35]=[CH:34][C:31]([C:32]#[N:33])=[CH:30][CH:29]=4)[CH2:24][CH2:23]3)=[O:11])=[C:7]([CH3:20])[CH:6]=2)[CH2:2][CH2:3][CH2:4]1

Participants

7

Reactant 5

HCID 111,2-DichloroethaneHCID 757711-HydroxybenzotriazoleHCID 81531DiisopropylethylamineHCID 193916184-(Piperidin-4-yl)benzonitrile--hydrogen chloride (1/1)2×HCID 178433965HCID 178433965, compound2×

Product 1

HCID 178433960DenifanstatYield 46.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 4-cyclobutyl-2-methyl-5-(5-methyl-4H-1,2,4-triazol-3-yl)benzoic acid (compound 152.8, 260 mg, 0.95 mmol) in DMF (4 mL) were added 4-(piperidin-4-yl)benzonitrile hydrochloride salt (compound 1.5, 232 mg, 1.045 mmol), EDC (272 mg, 1.425 mmol), HOBt (39 mg, 0.285 mmol), and DIEA (367.7 mg, 2.85 mmol). The resulting mixture was stirred at room temperature for 16 hours. The mixture was quenched with saturated aqueous NaHCO3 (20 mL) and extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with brine (50 mL), dried over Na2SO4, filtered, and concentrated in vacuo. Purification via SiO2 column chromatography (dichloromethane/methanol=95/5) afforded 4-(1-(4-cyclobutyl-2-methyl-5-(5-methyl-4H-1,2,4-triazol-3-yl)benzoyl)piperidin-4-yl)benzonitrile as a white solid (193 mg, 44% yield). m/z (ES+) 440 (M+H)+. 1H NMR (300 MHz, CD3OD): δ 7.69 (d, J=5.4 Hz. 2H), 7.56-7.30 (m, 4H), 1 proton obscured by methanol solvent peak, 4.10-3.98 (m, 1H), 3.64 (t, J=10.7 Hz, 1H), 3.33-3.21 (m, 1H), 3.00 (t, J=8.9 Hz, 2H), 2.58 (s, 3H), 2.48 and 2.38 (2 singlets, amide rotamers, ArCH3, 3H), 2.28-1.92 (m, 6H), 1.92-1.55 (m, 4H). 1H NMR (400 MHz, DMSO-d6): δ 13.66 (s, 1H), 7.77 (d, J=8.0 Hz, 2H), 7.62-7.34 (m, 4H), 4.78-4.63 (m, 1H), 4.31 (br s, 1H), 3.45 (br s, 1H), 3.15 (app t, J=12.3 Hz, 1H), 2.99-2.78 (m, 2H), 2.44-1.80 (m, 12H), 1.80-1.37 (m, 4H).

Workup

  1. customThe mixture was quenched with saturated aqueous NaHCO3 (20 mL)
  2. extractionextracted with ethyl acetate (2×50 mL)
  3. washThe combined organic layers were washed with brine (50 mL)
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customPurification via SiO2 column chromatography (dichloromethane/methanol=95/5)

Sources & evidence

ORD record
ord-6f2da0f2249c477f82002eda10d002bd
Source dataset
uspto-grants-2014_10
Patent number
US08871790B2

Reaction notes

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