乙醇 、 N'-[5-(4-methylphenyl)-2-oxofuran-3(2H)-ylidene]benzohydrazide 在
三乙胺 作用下,
生成 ethyl 4-(4-methylphenyl)-4-oxo-2-[2-(phenylcarbonyl)hydrazinylidene]butanoate 、
1-benzoyl-5-hydroxy-5-(4-methylphenyl)-4H-pyrazole-3-carboxylic acid ethyl ester 、 ethyl 4-(4-methylphenyl)-4-oxo-2-[2-(phenylcarbonyl)hydrazinylidene]butanoate