Invention Grant
- Patent Title: Method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1H-pyrazole-4-carbaldehydes and 1-alkyl-3-difluoromethyl-5-fluor-1H-pyrazole-4-carboxylates
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Application No.: US15113377Application Date: 2015-01-22
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Publication No.: US09656966B2Publication Date: 2017-05-23
- Inventor: Norbert Lui , Sergii Pazenok
- Applicant: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
- Applicant Address: DE Monheim am Rhein
- Assignee: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
- Current Assignee: BAYER CROPSCIENCE AKTIENGESELLSCHAFT
- Current Assignee Address: DE Monheim am Rhein
- Agency: Morrison & Foerster LLP
- Priority: EP14356001 20140124
- International Application: PCT/EP2015/051184 WO 20150122
- International Announcement: WO2015/110493 WO 20150730
- Main IPC: C07D231/16
- IPC: C07D231/16
Abstract:
The present invention relates to a novel method for preparing 1-alkyl-3-difluoromethyl-5-fluor-1H-pyrazole-4-carbaldehydes or esters thereof of formula (I) by means of reductive dehalogenation, starting from 1-alkyl-3-chlorodifluoromethyl-5-fluoro-1H-pyrazole-4-carbaldehydes or esters thereof Formula (I)
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