发明授权
US08431718B2 Process for the preparation of 5-fluoro-1-alkyl-3-fluoroalky1-1H-pyrazole-4-carbonyl chlorides and fluorides 有权
制备5-氟-1-烷基-3-氟烷基-1H-吡唑-4-羰基氯和氟化物的方法

Process for the preparation of 5-fluoro-1-alkyl-3-fluoroalky1-1H-pyrazole-4-carbonyl chlorides and fluorides
摘要:
The present invention relates to a novel process for the preparation of 5-fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl halides and the intermediates occurring in this process, ethyl 5-chloro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxylate and ethyl 5-fluoro-1-methyl-3-difluoromethyl-1H-pyrazole-4-carboxylate.
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