Pyridine → tert-butyl (3-tert-butyl-1-(3-(trifluoromethoxy)phenyl)-1H-pyrazol-5-yl)methylcarbamate

Participants

Reaction Steps

To a mixture tert-butyl (3-tert-butyl-1H-pyrazol-5-yl)methylcarbamate (501 mg, 1.98 mmol, 1 equiv.), 3-(trifluoromethoxy)-phenylboronic acid (814 mg, 3.96 mmol, 2 equiv.) and copper acetate (541 mg, 2.97 mmol, 1.5 equiv.) in dichloromethane (30 mL) was added pyridine (315 mg, 0.315 mL, 3.96 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 (3-tert-butyl-1-(3-(trifluoromethoxy)phenyl)-1H-pyrazol-5-yl)methylcarbamate (294 mg, 36%).

Provenance & Evidence