2-[4-(Carboxymethyl-carbamoyl)-2-nitro-phenylamino]-4-methyl-thiazole-5-carboxylic acid ethyl ester 、
异香兰素 在
sodium acetate 、
乙酸酐 作用下,
以70%的产率得到ethyl 2-[4-[(4E)-4-[(3-hydroxy-4-methoxyphenyl)methylidene]-5-oxo-1,3-oxazol-2-yl]-2-nitroanilino]-4-methyl-1,3-thiazole-5-carboxylate