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    Preparation of 2-cyanohexanoic acid derivatives
    41.
    发明公开
    Preparation of 2-cyanohexanoic acid derivatives 失效
    Verfahren zur Herstellung von Derivaten der 2-Cyanohexansäure。

    公开(公告)号：EP0003857A1

    公开(公告)日：1979-09-05

    申请号：EP79200073.9

    申请日：1979-02-09

    申请人： SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.

    发明人： Sheldon, Roger Arthur ,  Anderson, Martin ,  Verbrugge, Herman ,  Syrier, Johannes Leopold Marie

    IPC分类号： C07C121/40 ,  B01J31/20

    CPC分类号： B01J31/0235 ,  B01J31/20 ,  B01J2231/32 ,  B01J2531/60 ,  B01J2531/70 ,  B01J2531/80 ,  B01J2531/821 ,  B01J2531/822 ,  B01J2531/825 ,  B01J2531/827 ,  B01J2531/84 ,  B01J2531/845 ,  C07C255/00

    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.

    摘要翻译： 一种制备具有以下通式的2-氰基己酸衍生物的方法：其中X和Y各自表示氯或溴原子，每个Hal表示氟，氯或溴原子，R 1和R 2 各自独立地表示1-4个碳原子的烷基，其包括使下列通式的戊烯酸化合物：其中R 1和R 2具有与通式I中相同含义的 其中在催化剂和反应物的溶剂的存在下，其中HaI，X和Y具有与通式I中相同含义的通式为CHal 2 XY（III）的四卤代甲烷，其特征在于催化剂为过渡 属于元素周期表VIB族，VIIB族或VIII族的分裂状态的金属或这种过渡金属的羰基。 2-氰基己酸衍生物可用作制造合成拟除虫菊酯的中间体，它们是一组非常活泼的杀虫剂。