发明名称 |
PREPARATION OF CYCLOPROPANE ESTERS |
摘要 |
The invention provides an improved process for the preparation of a lower alkyl ester of 3-(2-chloro-3,3,3-trifluoroprop-1-en-1-yl)-2,2-dimethylcyclopropane carboxylic acid in which the corresponding lower alkyl ester of a carboxylic acid selected from 6-bromo-6-chloro-3,3-dimethyl-7,7,7-trifluorohept-2-enoic acid and 6,6-dichloro-3,3-dimethyl-7,7,7-trifluorohept-2-enoic acid is treated with an alkali metal lower alkoxylate in the presence of an aromatic hydrocarbon solvent under conditions under which the lower alcohol of the alkoxylate is removed from the reaction mixture by distillation with the aromatic solvent. The products are useful as intermediates in the manufacture of pyrethroid insecticides.
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申请公布号 |
WO9616018(A1) |
申请公布日期 |
1996.05.30 |
申请号 |
WO1995GB02570 |
申请日期 |
1995.11.02 |
申请人 |
ZENECA LIMITED;BOWDEN, MARTIN, CHARLES;BROWN, STEPHEN, MARTIN |
发明人 |
BOWDEN, MARTIN, CHARLES;BROWN, STEPHEN, MARTIN |
分类号 |
C07C67/333;C07C67/54;C07C69/743;C07C69/747;(IPC1-7):C07C69/743;C07C67/317 |
主分类号 |
C07C67/333 |
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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