Pyridine → tert-butyl (1-(3-ethoxy-5-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methylcarbamate

Participants

Reaction Steps

To a mixture of tert-butyl (3-(trifluoromethyl)-1H-pyrazol-5-yl)methylcarbamate (251 mg, 0.947 mmol, 1 equiv.), 3-ethoxy-5-methylphenylboronic acid (341 mg, 1.89 mmol, 2 equiv.) and copper acetate (259 mg, 1.42 mmol, 1.5 equiv.) in dichloromethane was added pyridine (151 mg, 0.151 mL, 1.89 mmol, 2 equiv) and the mixture was stirred for 2 d at room temperature. The reaction mixture was filtered over silica gel, the filter cake was washed with 250 mL of dichloromethane and the filtrate was evaporated to give tert-butyl (1-(3-ethoxy-5-methylphenyl)-3-(trifluoromethyl)-1H-pyrazol-5-yl)methylcarbamate (354 mg, 94%).

Provenance & Evidence