发明名称 |
A method of epimerization of alkyl chrysanthemate. |
摘要 |
<p>Cis-chrysanthemate esters are isomerized by contact with a Lewis acid, to transform the cis-chrysanthemate ester into trans-chrysanthemate ester through epimerization at C3-position. The starting cis-chrysanthemate ester may be of any optical isomer ratio of (+)-form to (-)-form, including racemic form. The process is particularly suitable for use in the preparation of a (+)-trans-chrysanthemate ester from which (+)-trans-chrysanthemic acid can readily be prepared, the latter being an important acid component of pyrethroidal insecticides. </p> |
申请公布号 |
EP0062979(A1) |
申请公布日期 |
1982.10.20 |
申请号 |
EP19820301470 |
申请日期 |
1982.03.22 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
SUZUKAMO, GOHFU;FUKAO, MASAMI |
分类号 |
C07C51/487;(IPC1-7):07C69/747;07B20/00;07C67/333 |
主分类号 |
C07C51/487 |
代理机构 |
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代理人 |
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