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    • 59. 发明授权
    • Process for the preparation of 1,1-dichloro-alkenes
    • 1,1-二氯 - 烯烃的制备方法
    • US4492800A
    • 1985-01-08
    • US468786
    • 1983-02-22
    • Fritz MaurerUwe PriesnitzHans-Jochem Riebel
    • Fritz MaurerUwe PriesnitzHans-Jochem Riebel
    • C07C69/743C07C17/00C07C17/26C07C17/263C07C21/04C07C21/19C07C22/00C07C22/02C07C22/04C07C45/00C07C49/567C07C51/00C07C61/40C07C67/00C07C253/00C07C255/48C07C69/74C07C121/48C07C121/60
    • C07C17/2635C07C21/19
    • A process for the preparation of a 1,1-dichloro-alkene of the formula ##STR1## in which R.sup.1 is hydrogen, or an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, aralkyl, aralkenyl or aryl radical, andR.sup.2 is an optionally substituted alkyl, alkenyl, alkinyl, cycloalkyl, aralkyl, aralkenyl or aryl radical, orR.sup.1 and R.sup.2 together form an optionally branched and/or optionally benzo-fused hydrocarbon chain,comprising reacting a carbonyl compound of the formula ##STR2## with a trichloromethanephosphonic acid ester of the formula ##STR3## in which R.sup.3 each individually is an alkyl or phenyl radical, or together are alkanediyl,in the presence of at least an equimolar amount of magnesium. Advantageously,R.sup.1 is hydrogen,R.sup.2 is a C.sub.2 to C.sub.5 alkenyl radical or a radical of the formula ##STR4## Z is a cyano, acetal, carboxyl or C.sub.1 to C.sub.4 alkoxycarbonyl radical, or a radical of the formula COOM, andM is sodium or potassium,R.sup.3 each individually is a C.sub.1 to C.sub.4 alkyl or phenyl radical, or the two radicals R.sup.3 together are C.sub.2 to C.sub.5 alkanediyl,about 0.95 to 1.4 moles of the trichloromethanephosphonic acid ester and about 1.5 to 4 moles of magnesium are employed per mole of the carbonyl compound, and the reaction is carried out at a temperature between about 0.degree. and 150.degree. C. in a polar aprotic solvent. The products are known intermediates, especially for insecticides.
    • 制备其中R 1为氢或任选取代的烷基,烯基,炔基,环烷基,芳烷基,芳烯基或芳基的式“IMAGE”的1,1-二氯 - 烯烃的方法,R 2为任选地 取代的烷基,烯基,炔基,环烷基,芳烷基,芳烯基或芳基,或者R 1和R 2一起形成任选支链和/或任选的苯并稠合烃链,包括使式IMA的羰基化合物与三氯甲烷膦酸 酯,其中R 3各自独立地是烷基或苯基,或者在至少等摩尔量的镁的存在下一起是烷二基。 有利地,R 1是氢,R 2是C 2至C 5链烯基或下式的基团Z是氰基,缩醛,羧基或C 1至C 4烷氧基羰基,或式COOM的基团,M是钠 或钾,R 3各自独立地为C 1至C 4烷基或苯基,或两个基团R 3一起为C 2至C 5烷二基,每摩尔使用约0.95至1.4摩尔三氯甲烷膦酸酯和约1.5至4摩尔镁 的羰基化合物,并且反应在极性非质子溶剂中在约0℃至150℃的温度下进行。 该产品是已知的中间体,特别是杀虫剂。