发明名称 |
Process for the preparation of cyclopropane carboxylic acid esters |
摘要 |
3-Halogenoethyl- or propyl-2,2-dimethylcyclopropane carboxylic acid esters, which are intermediates in the preparation of synthetic pyrethroids, are prepared by the reaction of certain halogenopentenes or hexenes with a diazoacetic ester in the presence of a catalyst which is metallic copper or a copper (II) salt, a rhodium (II) salt of a carboxylic acid or a transition metal complex of certain chiral Schiff bases. By the use of the latter class of catalysts the yield of preferred cis IR isomer may be increased relative to the other possible isomers.
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申请公布号 |
US4288387(A) |
申请公布日期 |
1981.09.08 |
申请号 |
US19800156077 |
申请日期 |
1980.06.02 |
申请人 |
IMPERIAL CHEMICAL INDUSTRIES LIMITED |
发明人 |
CROSBY, JOHN;HOLLAND, DAVID;LAIDLER, DALE A.;MILNER, DAVID J. |
分类号 |
C07C67/30;A01N53/08;B01J23/00;B01J23/72;B01J31/00;B01J31/04;B01J31/22;C07B61/00;C07C67/00;C07C67/343;C07C69/74;C07C253/00;C07C255/39;C07D213/53;C07H15/18;C07H15/26;C07H23/00;(IPC1-7):C07C69/74;C07C121/75 |
主分类号 |
C07C67/30 |
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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