发明公开
- 专利标题: PROCEDE DE PREPARATION DE COMPOSES ALPHA, BETA-DIFLUOROACRYLIQUES
- 专利标题(英): Method of preparing alpha, beta-difluoroacrylic compounds
- 专利标题(中): 程序编制组合物α,β-二氟丙烯酸酯
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申请号: EP04716264.9申请日: 2004-03-02
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公开(公告)号: EP1599436A2公开(公告)日: 2005-11-30
- 发明人: AMEDURI, Bruno , BOUTEVIN, Bernard , GUIOT, Jérôme
- 申请人: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS) , Ecole Nationale Superieure de Chimie de Montpellier
- 申请人地址: 3, rue Michel Ange 75016 Paris FR
- 专利权人: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS),Ecole Nationale Superieure de Chimie de Montpellier
- 当前专利权人: CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE (CNRS),Ecole Nationale Superieure de Chimie de Montpellier
- 当前专利权人地址: 3, rue Michel Ange 75016 Paris FR
- 代理机构: Sueur, Yvette
- 优先权: FR0302638 20030304
- 国际公布: WO2004081169 20040923
- 主分类号: C07C51/27
- IPC分类号: C07C51/27 ; C07C53/21
摘要:
The invention relates to a method of preparing α,β-difluoroacrylic acid and α,β-alkyl difluoroacrylates. The inventive method consists in: preparing 2,3-difluoro-2,3-dichloropropanol (I) by radical telomerisation of CFCl=CFCl with CH3OH; oxidising (I) in order to obtain 2,3-difluoro-2,3-dichloropropanoic acid (II); and treating (II) with Zn in order to dechlorinate and, optionally, esterify the acid function before or after the dechlorination step.
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