发明公开
EP0003857A1 Preparation of 2-cyanohexanoic acid derivatives
失效
Verfahren zur Herstellung von Derivaten der 2-Cyanohexansäure。
- 专利标题： Preparation of 2-cyanohexanoic acid derivatives
- 专利标题（中）： Verfahren zur Herstellung von Derivaten der 2-Cyanohexansäure。
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申请号： EP79200073.9申请日： 1979-02-09
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公开(公告)号： EP0003857A1公开(公告)日： 1979-09-05
- 发明人: Sheldon, Roger Arthur , Anderson, Martin , Verbrugge, Herman , Syrier, Johannes Leopold Marie
- 申请人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
- 申请人地址： Carel van Bylandtlaan 30 NL-2596 HR Den Haag NL
- 专利权人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
- 当前专利权人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.
- 当前专利权人地址： Carel van Bylandtlaan 30 NL-2596 HR Den Haag NL
- 代理机构： Rogers, Roy Charles
- 优先权： GB672278 19780220; GB2191178 19780524
- 主分类号： C07C121/40
- IPC分类号： C07C121/40 ; B01J31/20
摘要：
A process for the preparation of 2-cyanohexanoic acid derivative having the general formula:
wherein X and Y each represent a chlorine or bromine atom, each Hal represents a fluorine, chlorine or bromine atom and R 1 and R 2 each independently represent an alkyl group of one to four carbon atoms, which comprises reacting a pentenoic acid compound of the general formula:
wherein R 1 and R 2 have the same meaning as in the general formula I, with a tetrahalomethane of the general formula:
wherein Hal, X and Y have the same meaning as in the general formula 1, in the presence of a catalyst and a solvent for the reactants, characterized in that the catalyst is a transition metal in a divided state belonging to Groups VIB, VIIB or VIII of the Periodic Table of the Elements or a carbonyl of such a transition metal. The 2-cyanohexanoic acid derivatives are useful as intermediates in the manufacture of synthetic pyrethroids which are a group of very active insecticides.
wherein X and Y each represent a chlorine or bromine atom, each Hal represents a fluorine, chlorine or bromine atom and R 1 and R 2 each independently represent an alkyl group of one to four carbon atoms, which comprises reacting a pentenoic acid compound of the general formula:
wherein R 1 and R 2 have the same meaning as in the general formula I, with a tetrahalomethane of the general formula:
wherein Hal, X and Y have the same meaning as in the general formula 1, in the presence of a catalyst and a solvent for the reactants, characterized in that the catalyst is a transition metal in a divided state belonging to Groups VIB, VIIB or VIII of the Periodic Table of the Elements or a carbonyl of such a transition metal. The 2-cyanohexanoic acid derivatives are useful as intermediates in the manufacture of synthetic pyrethroids which are a group of very active insecticides.
公开/授权文献
- EP0003857B1 Preparation of 2-cyanohexanoic acid derivatives 公开/授权日：1982-03-10
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