Process for the preparation of 5-Fluoro-1-alkyl-3-fluoroalkyl-1H-pyrazole-4-carbonyl Chlorides and Fluorides
申请人:Pazenok Sergii
公开号:US20110288305A1
公开(公告)日:2011-11-24
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.
本发明涉及一种制备5-氟-1-烷基-3-氟烷基-1H-吡唑-4-羰基卤代物和该过程中出现的中间体,即乙酸乙酯5-氯-1-甲基-3-二氟甲基-1H-吡唑-4-羧酸乙酯和乙酸乙酯5-氟-1-甲基-3-二氟甲基-1H-吡唑-4-羧酸乙酯的新工艺。