申请人:Monsanto Company
公开号:US05874628A1
公开(公告)日:1999-02-23
The invention is an improved method for the preparation of tertiary phosphines by way of cross-coupling of aryl, alkenyl, cycloalkenyl or aralkyl halides or aryl, alkenyl, cycloalkenyl or aralkyl sulfonate esters with chlorophosphines in the presence of a catalyst and a reductant. The general reaction scheme is shown below: ##STR1## wherein R.sup.1 is aryl, alkenyl, cycloalkenyl or aralkyl, any of which may be substituted by one or more of the following: alkyl, aryl, aralkyl, alkoxy, alkanoyl, chloro, fluoro, alkoxycarbonyl, cyano, trifluoromethyl, cycloalkyl, or CONR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are independently hydrogen, alkyl, aryl or aralkyl; R.sup.2 and R.sup.3 are independently aryl, alkyl, aralkyl, any of which may be substituted by one or more of the following: alkyl, aryl, aralkyl, alkoxy, alkanoyl, chloro, fluoro, alkoxycarbonyl, cyano, trifluoromethyl, cycloalkyl or CoNR.sup.4 R.sup.5 wherein R.sup.4 and R.sup.5 are independently hydrogen, alkyl, aryl or aralkyl; and n is 2 where R.sup.1 is a difunctional moiety and 1 for any other R.sup.1 ; and X is Cl, Br, I, or OSO.sub.2 Y; wherein Y is alkyl, trihalomethyl, phenyl, halophenyl, or alkylphenyl.
这项发明是通过催化剂和还原剂的存在,以芳基、烯基、环烯基或芳基烷基卤化物或芳基、烯基、环烯基或芳基烷基磺酸酯与氯代膦发生交叉偶联反应的改进方法,用于制备三级膦化合物。一般反应方程式如下:##STR1## 其中R.sup.1是芳基、烯基、环烯基或芳基烷基,其中任何一个都可以被以下一个或多个取代:烷基、芳基、芳基烷基、烷氧基、烷酰基、氯、氟、烷氧羰基、氰、三氟甲基、环烷基或CONR.sup.4 R.sup.5,其中R.sup.4和R.sup.5分别是氢、烷基、芳基或芳基烷基;R.sup.2和R.sup.3分别是芳基、烷基、芳基烷基,其中任何一个都可以被以下一个或多个取代:烷基、芳基、芳基烷基、烷氧基、烷酰基、氯、氟、烷氧羰基、氰、三氟甲基、环烷基或CoNR.sup.4 R.sup.5,其中R.sup.4和R.sup.5分别是氢、烷基、芳基或芳基烷基;当R.sup.1是双官能团时,n为2,否则为1;X为Cl、Br、I或OSO.sub.2 Y;其中Y为烷基、三卤甲基、苯基、卤代苯基或烷基苯基。