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    • 52. 发明授权
    • Method of preparing halogenated olefinic derivatives of saturated gamma-keto mono-carboxy acids and related compounds
    • 制备饱和甘氨酸 - 酮酸单羧酸和相关化合物的低聚烯醇衍生物的方法
    • US3862220A
    • 1975-01-21
    • US28481572
    • 1972-08-30
    • AIR PROD & CHEM
    • ERBY WILLIAM AWALDE ROBERT A
    • C07C59/88C07D307/58C07C65/00
    • C07C59/88C07D307/58
    • Direct halogenation of C4-C10 saturated keto monocarboxy acids or their acidogenic derivatives with elemental halogen to yield olefinic halogenated compounds (e.g., acids and lactones) containing at least four halogen atoms per molecule is disclosed. The halogenation is purely thermal with preferred temperature ranges being selected as a function of the particular end product desired. Halogenated products of the process as well as ammonia and amine salts of the acids made by the process are useful as insecticides, plant grown control agents and defoliants. Particularly useful products are those olefinic polychlorinated derivatives of gamma-keto-pentanoic acid which contain at least four chlorine atoms per molecule such as, for example, 2,3,5,5,5pentachloro-4-keto pentenoic acid, its ammonium salt and its amine salts.
    • 公开了C4-C10饱和酮基单羧酸或其酸性衍生物与元素卤素的直接卤化,以产生每分子含有至少四个卤素原子的烯属卤代化合物(例如酸和内酯)。 卤化是纯热的,优选的温度范围被选择为所需的特定最终产物的函数。 该方法的卤代产物以及通过该方法制备的酸的氨和胺盐可用作杀虫剂,植物生长的控制剂和脱叶剂。 特别有用的产品是每分子含有至少四个氯原子的γ-酮戊酸的烯烃多氯代衍生物,例如2,3,5,5,5-五氯-4-酮戊烯酸,其铵 盐及其胺盐。