发明授权
- 专利标题： Method for producing o-chloromethyl benzoic acid chlorides
- 专利标题（中）： 邻氯甲基苯甲酸氯化物的生产方法
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申请号： US10130821申请日： 2000-11-27
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公开(公告)号： US07034181B1公开(公告)日： 2006-04-25
- 发明人: Roland Götz , Norbert Götz , Michael Keil , Bernd Wolf , Adrian Steinmetz , Armin Stamm , Jochem Henkelmann
- 申请人： Roland Götz , Norbert Götz , Michael Keil , Bernd Wolf , Adrian Steinmetz , Armin Stamm , Jochem Henkelmann
- 申请人地址： DE Ludwigshafen
- 专利权人： BASF Aktiengesellschaft
- 当前专利权人： BASF Aktiengesellschaft
- 当前专利权人地址： DE Ludwigshafen
- 代理机构： Novak Druce & Quigg, LLP
- 优先权： DE19958757 19991207; DE10007694 20000219
- 国际申请： PCT/EP00/11817 WO 20001127
- 国际公布： WO01/42185 WO 20010614
- 主分类号： C07C51/58
- IPC分类号： C07C51/58
摘要：
The invention relates to a method for producing o-chloromethyl benzoic acid chlorides of formula (I), in which R1 to R4 can be the same or different and represent hydrogen C1–C4 alkyl, halogen or trifluoromethyl, by reaction benzo condensed lactones of formula (II), in which R1 to R4 have the above-mentioned meaning, with thionyl chloride. The inventive method is characterized in that the reaction is carried out in the presence of catalytic quantities of a Lewis acid and in the presence of catalytic quantities of a phosphine derivative.
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