Unusual Course of Reaction of Triphenyl(2-p-toluylethyl)phosphonium Bromide with Hydrazine

摘要

The reaction of triphenyl(2-p-toluylethyl)phosphonium bromide with hydrazine hydrochloride yields,along with the hydrazone,6-p-tolyl-2,3-dihydropyridazin-3-one as a minor product.Previously,in a study of functionalization of 2-aroylacrylic acids,we prepared 2-aroylethylphos-phonium salt oximes,and also triphenyl-(2-toluyl-1-methoxycarbonylethyl)phosphonium bromide oxime and hydrazone[1].