Pyridine → tert-butyl (1-(3,5-difluorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methylcarbamate

Participants

Reaction Steps

To a mixture tert-butyl (3-(trifluoromethyl)-1H-pyrazol-5-yl)methylcarbamate (251 mg, 0.946 mmol, 1 equiv.), 3,5-difluorophenylboronic acid (299 mg, 1.89 mmol, 2 equiv.) and copper acetate (258 mg, 1.49 mmol, 1.5 equiv.) in dichloromethane (14 mL) was added pyridine (151 mg, 0.151 mL, 1.89 mmol, 2 equiv) and the mixture was stirred in the presence of air for 2 d at room temperature. The reaction mixture was filtered over silica gel, the filter cake was washed with dichloromethane (250 mL) and the solvent of the filtrate was evaporated to give tert-butyl (1-(3,5-difluorophenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methylcarbamate (214 mg, 60%).

Provenance & Evidence