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    • 10. 发明授权
    • Preparation of 1,1-dihalogeno-alkenes
    • 制备1,1-二卤代烯烃
    • US4424166A
    • 1984-01-03
    • US237005
    • 1981-02-23
    • Fritz MaurerUwe PriesnitzHans-Jochem Riebel
    • Fritz MaurerUwe PriesnitzHans-Jochem Riebel
    • C07C69/743C07C17/00C07C17/26C07C17/263C07C21/02C07C21/17C07C22/00C07C22/02C07C22/04C07C22/08C07C45/00C07C49/567C07C51/00C07C61/40C07C67/00C07C231/00C07C231/12C07C233/38C07C253/00C07C255/48C07C121/48C07C61/35C07C121/66
    • C07C17/263
    • In the preparation of a 1,1-dihalogenoalkene of the formula ##STR1## in which R.sup.1 is a hydrogen atom or an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl, aralkenyl or aryl radical, and R.sup.2 is an optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, aralkyl, aralkenyl or aryl radical, or R.sup.1 and R.sup.2 together form an optionally branched and/or optionally benzo-fused hydrocarbon chain, and X.sup.1 and X.sup.2 each independently is a halogen atom, wherein a carbonyl compound of the formula ##STR2## is reacted with a trihalogenoacetate of the formula ##STR3## in which X.sup.3 is a halogen atom, and M.sup..sym. is an alkali metal ion or one equivalent of an alkaline earth metal ion, in the presence of an approximately equimolar amount of a phosphorus-containing compound, the improvement which comprises employing as said phosphorus-containing compound a phosphorous acid trialkyl ester or a phosphorous acid triamide and effecting the reaction at a temperature between about 0.degree. and 200.degree. C. A preferred end product is ##STR4## and the preferred phosphorus-containing compound is trimethyl phosphite, triethyl phosphite, tripropyl phosphite or phosphorous acid tris-dimethyl-amide.
    • 在制备其中R 1为氢原子或任选取代的烷基,烯基,炔基,环烷基,芳烷基,芳烯基或芳基的式“IMAGE”的1,1-二卤代烯烃中,R 2为任选取代的烷基, 烯基,炔基,环烷基,芳烷基,芳烯基或芳基,或R 1和R 2一起形成任选支链和/或任选的苯并稠合烃链,并且X 1和X 2各自独立地为卤素原子,其中式 与式(X3)中的X为卤素原子的式(III)的三卤代乙酸酯反应,M(+)​​为碱金属离子或1当量碱土金属离子,在大约等摩尔量存在下 的含磷化合物,其改进包括使用磷酸三烷基酯或亚磷酸三酰胺作为所述含磷化合物,并在约0℃至200℃的温度下进行反应。 优选的最终产物是“IMAGE”,优选的含磷化合物是亚磷酸三甲酯,亚磷酸三乙酯,亚磷酸三丙酯或亚磷酸三 - 二甲基 - 酰胺。