Pyridine → 5-(4-Chloro-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid (3-methanesulfonyl-phenyl)-amide

Participants

Reaction Steps

5-(4-Chloro-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine-2-carbonyl chloride (0.100 g, 0.277 mmol) (prepared from 5-(4-chloro-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid using standard procedures, e.g.; thionyl chloride) was added to a solution of 3-methanesulfonyl-phenylamine (0.052 mL, 0.304 mmol) in acetonitrile (10 mL) containing pyridine (0.067 mL, 0.831 mmol). The reaction mixture was stirred overnight at room temperature, diluted with ethyl acetate (25 mL) and washed with 1M hydrochloric acid (50 mL). The organic layer was collected, concentrated under reduced pressure and the crude product was purified by column chromatography on silica gel to give 5-(4-chloro-phenyl)-7-trifluoromethyl-pyrazolo[1,5-a]pyrimidine-2-carboxylic acid (3-methanesulfonyl-phenyl)-amide (0.128 g, 93%).

Provenance & Evidence