Benzyl mercaptan → 5-(benzylsulphanyl)-1-methyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole

Participants

Reaction Steps

A solution of 3.00 g (10.5 mmol) of 5-fluoro-1-methyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole and 1.48 ml (12.6 mmol) of benzylmercaptan is initially introduced into 24 ml of acetonitrile at 0° C. 4.78 ml (34.3 mmol) of triethylamine are then added dropwise and the reaction mixture is stirred for two hours at between 0° C. and 10° C. Following concentration by evaporation in vacuo, the resulting oil is purified by chromatography on silica gel, giving 3.19 g of 5-(benzylsulphanyl)-1-methyl-3-(pentafluoroethyl)-4-(trifluoromethyl)-1H-pyrazole (78%).

Provenance & Evidence