5-(4-Chloro-benzoyl)-3-methyl-6-[(E)-methylimino]-5,6-dihydro-pyrazolo[5,1-b]thiazole-2,7-dicarboxylic acid 2-ethyl ester 7-methyl ester 在
一水合肼 作用下,
以
乙醇 为溶剂,
反应 1.0h,
以92%的产率得到3-(4-Chloro-benzoylamino)-4-methyl-2-[3-[(Z)-methylimino]-5-oxo-pyrazolidin-(4Z)-ylidene]-2,3-dihydro-thiazole-5-carboxylic acid ethyl ester