2,5-dihydro-α-hydroxy-3-methyl-5-oxo-1-(4-phenoxyphenyl)-α-trifluoromethyl-1H-pyrazole-4-acetic acid methyl ester 在
氯化亚砜 作用下,
以
甲苯 为溶剂,
反应 3.0h,
生成 2-[1,5-dihydro-3-methyl-5-oxo-1-(4-phenoxyphenyl)-4H-pyrazol-4-ylidene]-3,3,3-trifluoro-propanoic acid methyl ester