4-hydrazino-2-hydroxy-benzoic acid ethyl ester; hydrochloride 、
ethyl 3-methyl-1,4-naphthoquinone-2-ylthiacetate 以
乙醇 为溶剂,
反应 2.0h,
以75%的产率得到4-{N'-[2-Ethoxycarbonylmethylsulfanyl-3-methyl-4-oxo-4H-naphthalen-(1Z)-ylidene]-hydrazino}-2-hydroxy-benzoic acid ethyl ester