1-(4-Bromophenyl)-4,4,4-trifluorobutane-1,3-dione → 5-[5-(4-bromophenyl)-3-(trifluoromethyl)-1H-pyrazol-1-yl]-2-pyridinesulfonamide

Participants

Reaction Steps

A mixture of 1-(4-bromophenyl)-4,4,4-trifluoro-1,3-butanedione (prepared according to the method of J. Med. Chem., 1997, 40, 1347. 1.09 g, 3.71 mmol) and 5-hydrazino-2-pyridinesulfonamide hydrochloride (1.00 g, 4.45 mmol) in ethanol (50 ml) was refluxed for 18 hr. After evaporation, the obtained residue was chromatographed on a column of silica gel (200 g) eluting with ethyl acetate/hexane (1:2) to afford 1.44 g (87%) of the title compound as a white solid.

Provenance & Evidence