Water → 1-(4-Fluoro-3-cyanophenyl)-3-trifluoromethyl-5-hydroxymethylpyrazole

Participants

Reaction Conditions

Reaction Steps

To a solution of 1-(4-fluoro-3-cyanophenyl)-3-trifluoromethyl-5-bromomethylpyrazole (0.6 g, 1.72 mmol) in DMSO (10 mL) was added copper (I) oxide (0.52 g, 3.62 mmol) and water (3 mL). The reaction was stirred at 60° C. overnight. The next day the reaction mixture was filtered through Celite®. The filtrate was partitioned between ethyl acetate and water. The organic was washed three times with water, brine, dried over sodium sulfate, filtered and concentrated to leave 1-(4-fluoro-3-cyanophenyl)-3-trifluoromethyl-5-hydroxymethyl pyrazole (0.45 g, 92% yield) as pure compound: MS (CI): 286 (M+H)+ (100%).

Provenance & Evidence