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    • 3. 发明授权
    • Process for the preparation of halogenoalkenes
    • 卤代烯烃的制备方法
    • US4330482A
    • 1982-05-18
    • US218394
    • 1980-12-18
    • Hellmut Hoffmann
    • Hellmut Hoffmann
    • C07C69/743C07B31/00C07B37/04C07C17/00C07C17/263C07C45/00C07C45/68C07C49/567C07C67/00C07C253/00C07C255/06C07C255/48C07F9/38C07F9/40C07C21/19C07C121/48
    • C07F9/4065C07C45/68C07C49/567C07F9/4018C07F9/4056
    • In the process for the production of a halogenoalkene of the formula ##STR1## in which R.sup.1 is an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, cycloalkenyl, aralkyl, aralkenyl or aryl radical or an optionally substituted heterocyclic radical,R.sup.2 represents a halogen atom, a cyano group, an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, aralkenyl, aryl, alkylcarbonyl, arylcarbonyl, alkoxycarbonyl or aminocarbonyl radical or an optionally substituted heterocyclic radical, andX is a halogen atom,in which an .alpha.-hydroxy-phosphonic acid ester of the formula ##STR2## in which R.sup.3 each independently is an alkyl or phenyl radical, or the two radicals R.sup.3 together are an alkanediyl (alkylene) radical,is reacted with a phosphorus-containing olefinating agent of the formula ##STR3## in which Z.sup.1 is the phosphorus-containing radical ##STR4## R.sup.4 and R.sup.5 each independently is an alkyl, phenyl, alkoxy or phenoxy radical or together are an alkanedioxy radical, andR.sup.6 is an alkyl or phenyl radical,in the presence of a base at a temperature between about -70.degree. and +150.degree. C., the improvement which comprises effecting the reaction in the presence of a halogen carrier. The end products are useful as intermediates such as in synthesizing pyrethroid-like insecticides.
    • 在制备其中R 1为任选取代的烷基,烯基,炔基,环烷基,环烯基,芳烷基,芳烯基或芳基或任选取代的杂环基团的式IMAMA的卤代烯烃的方法中,R 2表示卤素原子 ,氰基,任选取代的烷基,烯基,炔基,环烷基,芳烯基,芳基,烷基羰基,芳基羰基,烷氧基羰基或氨基羰基或任选取代的杂环基,X是卤素原子,其中α-羟基膦酸 其中R 3各自独立地是烷基或苯基,或者两个基团R 3一起是烷二基(亚烷基)基团的式“IMAGE”的酸酯与式“IMAGE”的含磷烯烃化合物在 其中Z 1是含磷基团R 4和R 5各自独立地是烷基,苯基,烷氧基或苯氧基,或者一起是烷二氧基,R 6是烷基 1或苯基,在碱存在下,温度在约-70℃至+ 150℃之间,其改进包括在卤素载体存在下进行反应。 最终产物可用作合成拟除虫菊酯类杀虫剂的中间体。