8-bromo-7-hydroxy-5-methoxy-2-methyl-4-oxo-4H-benzopyran-6-carbaldehyde N-phenylthiosemicarbazone 、
溴代丙二酸二乙酯 在
sodium acetate 作用下,
以
溶剂黄146 为溶剂,
反应 24.0h,
以56%的产率得到3-phenyl 2-[(8-bromo-7-hydroxy-5-methoxy-2-methyl-4-oxo-4H-benzopyran-6-yl-methylene)-hydrazono]-4-oxothiazolidine-5-carboxylic acid ethyl ester