1-Hydroxybenzotriazole → HCID 178523488, compound

Participants

Reaction Steps

DIPEA (232 mg, 1.8 mmol) was added to a stirred solution of [(5-phenyl-1H-pyrazole-3-carbonyl)-amino]-acetic acid (148 mg, 0.6 mmol) in DMF (2 mL) followed by HOBt (95 mg, 0.7 mmol) and EDCI.HCl (137 mg, 0.7 mmol. After 2 minutes (2,4-difluoro-phenyl)-piperidin-4-yl-amine dihydrochloride (prepared by the method used for the synthesis of Intermediate 3) (150 mg, 0.6 mmol) was added to the reaction mixture and stirring was continued at ambient temperature overnight. The reaction mixture was diluted with cold water, extracted with ethyl acetate and dried over sodium sulfate. The organic layer thus collected was concentrated under reduced pressure. Purification by column chromatography (using 60-120 silica gel and 5% MeoH in CHCl3 as eluent) to afford 43 mg (16.5% Yield) of 5-phenyl-1H-pyrazole-3-carboxylic acid {2-[4-(2,4-difluoro-phenylamino)-piperidin-1-yl]-2-oxo-ethyl}-amide. LC/MS [M+H]+: 440.18, 94.52%. 1H NMR (300 MHz, DMSO-d6): δ13.8 (s, 1H), 8.1 (m, 1H), 7.8 (m, 2H), 7.4 (m, 4H), 7.0 (m, 1H), 6.9 (m, 2H), 5.0 (m, 1H), 4.4 (m, 1H), 4.2 (m, 2H), 3.5 (m, 1H), 3.2 (m, 1H), 2.8 (m, 1H), 2.0 (m, 2H), 1.5 (m, 2H).

Provenance & Evidence