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    • 25. 发明授权
    • Process for the preparation of
2,2-dimethyl-3-vinyl-cyclopropanecarboxylic acids and esters
    • 2,2-二甲基-3-乙烯基 - 环丙烷羧酸和酯的制备方法
    • US4423243A
    • 1983-12-27
    • US331403
    • 1981-12-16
    • Manfred JautelatDieter Arlt
    • Manfred JautelatDieter Arlt
    • C07C49/16B01J23/72B01J23/74B01J27/02B01J27/08B01J27/24B01J31/02B01J31/04B01J31/22C07C43/225C07C45/51C07C45/69C07C51/00C07C61/40C07C69/747C07C69/743
    • C07C45/69C07C43/225C07C45/513C07C51/00
    • A process for the production of 2,2-dimethyl-3-vinyl-cyclopropanecarboxylic acid derivative of the formula ##STR1## in which R.sup.1 is a hydrogen atom, an alkyl group or a radical of an alcohol which can be used in pyrethroids, andX.sup.1 and X.sup.2 each independently is a halogen atomor a fluorine-substituted alkyl radical, comprising adding (a) a polyhalogenoalkene of the formula ##STR2## in which X.sup.3 and X.sup.4 each independently is a halogen atom, to 1-chloro-3,3-dimethyl-pent-4-en-2-one of the formula ##STR3## in the presence of a catalyst which yields free radicals, or in the presence of a metal salt of the VIII main group or of the sub-group IVa, VIIa or Ib of the periodic system, thereby to obtain a mixture of compounds of the formula ##STR4## and (b) reacting either or both of such compounds with a base of a formula(R.sup.1 --O.sup..crclbar.).sub.n M.sup.n+ in whichM is an alkali metal or alkaline earth metal, andn is 1 or 2.The end products are known insecticides and intermediates therefor, while the intermediates produced by (a) are novel compounds.
    • 制备式“IMAGE”的2,2-二甲基-3-乙烯基 - 环丙烷羧酸衍生物的方法,其中R1是可用于拟除虫菊酯的氢原子,烷基或醇基,以及 X 1和X 2各自独立地为卤素原子或氟取代的烷基,其包括将(X3)和X4各自独立地为卤素原子的式(a)的多卤代烯烃加入到1-氯-3,3 在产生自由基的催化剂的存在下,或在VIII主族或亚组IVa的金属盐存在下,式“IMAGE”的2-二甲基 - 戊-4-烯-2-酮, VIIa或Ib,从而获得下式化合物的混合物,和(b)使这些化合物中的任一种或两者与式(R1-O( - ))nMn +的碱反应, 其中M为碱金属或碱土金属,n为1或2.最终产物为已知的杀虫剂及其中间体,而中间体 (a)生成的新颖化合物是新化合物。