发明名称 |
Improvements in the production of halocyclopropyl-substituted phenoxyalkanoic acids and esters. |
摘要 |
<p>A process is provided for production of an alkyl 2-[para-(2-2-dihalocyclopropyl)phenoxy]-2-lower alkyl propionate which comprises treating an alkyl 2-[4-(1-hydroxyethyl)phenoxy]-2-lower alkyl propanoate (IV) with a phosphorus halide and then with an organic base to produce the corresponding substituted styrene and then treating said styrene with a haloform, a strong alkali and a phase transfer catalyst. This process has given overall yields ten-fold greater than those described in the literature.</p> |
申请公布号 |
EP0142979(A2) |
申请公布日期 |
1985.05.29 |
申请号 |
EP19840307864 |
申请日期 |
1984.11.14 |
申请人 |
STERWIN AG. |
发明人 |
THORPE, JOHN GRAHAM;PEEL, RICHARD |
分类号 |
C07C51/09;C07C59/72;(IPC1-7):C07C69/736;C07C67/31 |
主分类号 |
C07C51/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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