Acetic Acid → 1-(3-Aminophenyl)-5-phenyl-3-(trifluoromethyl)pyrazole

Participants

Reaction Steps

Acetic acid (3 mL) and ethanol (2 mL) were added to 1-(3-nitrophenyl)-5-phenyl-3-(trifluoromethyl)pyrazole (0.59 g, 1.77 mmol) and 5% palladium on carbon (0.06 g), and the mixture was hydrogenated at room temperature for 2 hours under hydrogen atmosphere. After the insoluble matter was filtered off, the residue obtained by evaporation under reduced pressure was purified by column chromatography on silica gel (n-hexane:ethyl acetate=2:1) to give the title compound (491.1 mg, 91.4%) as a white solid.

Provenance & Evidence