4-bromo-4-(4-chlorophenoxy)-2,2-dimethyl-3-ketobutanoic acid ethyl ester 、
1H-1,2,4-三唑 在
二氯甲烷 、
水 、
Sodium sulfate-III 作用下,
以
乙腈 为溶剂,
反应 48.0h,
以24.9 g (78% of theory) of 4-(4-chlorophenoxy)-2,2-dimethyl-3-keto-4-(1,2,4-triazol-1-yl)-butanoic acid ethyl ester of melting point 88°-89° C. were obtained的产率得到4-(4-chloro-phenoxy)-2,2-dimethyl-3-oxo-4-[1,2,4]triazol-1-yl-butyric acid ethyl ester