4-(4-chlorophenoxy)-2,2-dimethyl-4-(imidazol-1-yl)-3-keto-butanoic acid ethyl ester 1,5-naphthalenedisulphonate 、
碳酸氢钠 在
Sodium sulfate-III 、 petroleum ether 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以85 g (98% of theory) of 4-(4-chlorophenoxy)-2,2-dimethyl-4-(imidazol-1-yl)-3-keto-butanoic acid ethyl ester of melting point 88° C. were obtained的产率得到4-(4-chloro-phenoxy)-4-imidazol-1-yl-2,2-dimethyl-3-oxo-butyric acid ethyl ester