发明授权
- 专利标题： Method for racemization of optically active chrysanthemic acid or its ester
- 专利标题（中）： 旋光菊酸或其酯的外消旋化方法
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申请号： US93234申请日： 1987-09-04
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公开(公告)号： US4788323A公开(公告)日： 1988-11-29
- 发明人: Gohfu Suzukamo , Yoji Sakito , Masami Fukao , Koji Hagiya
- 申请人： Gohfu Suzukamo , Yoji Sakito , Masami Fukao , Koji Hagiya
- 申请人地址： JPX Osaka
- 专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人： Sumitomo Chemical Company, Limited
- 当前专利权人地址： JPX Osaka
- 优先权： JPX61-208768 19860904; JPX62-28581 19870210; JPX62-28582 19870210
- 主分类号： C07C51/487
- IPC分类号： C07C51/487 ; C07C69/747
摘要：
Racemization of optically active chrysanthemic acid or its ester of the formula: ##STR1## wherein R represents a hydrogen atom or an alkyl, cycloalkyl or aralkyl group of 1-20 carbon atoms and * indicates an asymmetric carbon atom, is effected by contacting it with hydrogen bromide or a phosphorus bromide compound. This method may also be effected in the presence of a peroxide or an azo compound. This method is industrially very useful.
公开/授权文献
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