3,4,5-Triphenylpyrazoles

Abstract

Benzoin reacts with hydrazine hydrochloride in ethanol to give benzil, benzil azine, deoxybenzoin, benzaldehyde, benzonitrile, benzoic acid, ethyl benzoate, desylamine hydrochloride, 3,4,5-triphenylpyrazole, and 3,4,5,6-tetraphenylpyridazine and their hydrochlorides. A mechanism is proposed to account for some of the products, and some reactions of 3,4,5-triphenylpyrazole are described.