申请人:Hoechst Aktiengesellschaft
公开号:US05124470A1
公开(公告)日:1992-06-23
The present invention relates to a process for the preparation of arylalkylmethylsilanes of the formula I ##STR1## where X is CH.dbd.CH, N.dbd.CH, CH.dbd.N or S, R.sup.1 and R.sup.2 independently of one another are H, halogen, (C.sub.1 to C.sub.4)alkyl, (C.sub.1 to C.sub.4)alkoxy, (C.sub.1 to C.sub.4)alkylthio, (C.sub.1 to C.sub.4)haloalkyl, (C.sub.1 to C.sub.4)haloalkoxy or (C.sub.1 to C.sub.4)haloalkylthio, R.sup.3 is (C.sub.1 to C.sub.6)alkyl and m and n are 0, 1 or 2, which comprises reacting dichloromethylsilane II ##STR2## first with an arylmagnesium halide of the formula III ##STR3## where R.sup.1, R.sup.2, m, n and X are as defined in Formula I and Hal is halogen, at temperatures of from -78.degree. to 0.degree. C., and subsequently with an alkylmagnesium halide of the formula IV R.sup.3 --Mg Hal (IV), where R.sup.3 is as defined in formula I and Hal is halogen, if appropriate in the presence of a solvent.
本发明涉及一种制备芳基烷基甲基硅烷的方法,其化学式为I,其中X为CH.dbd.CH,N.dbd.CH,CH.dbd.N或S,R.sup.1和R.sup.2彼此独立地为H,卤素,(C.sub.1到C.sub.4)烷基,(C.sub.1到C.sub.4)烷氧基,(C.sub.1到C.sub.4)烷硫基,(C.sub.1到C.sub.4)卤代烷基,(C.sub.1到C.sub.4)卤代烷氧基或(C.sub.1到C.sub.4)卤代烷硫基,R.sup.3为(C.sub.1到C.sub.6)烷基,m和n为0、1或2。该方法包括首先将二氯甲基硅烷II与化学式III的芳基镁卤化物反应,其中R.sup.1、R.sup.2、m、n和X如化学式I中定义,Hal为卤素,在-78°C至0°C的温度下进行,然后再与化学式IV的烷基镁卤化物反应,其中R.sup.3如化学式I中定义,Hal为卤素,必要时在溶剂存在下进行。