申请人:Schering Aktiengesellschaft
公开号:US05908945A1
公开(公告)日:1999-06-01
Disclosed is an alkylating agent that contains an aluminum reagent Alk.sub.3-m AlL.sub.m, in which Alk means a methyl, ethyl, n- or i-propyl, n-, i- or tert-butyl, pentyl, hexyl, heptyl or octyl group, which all can also be branched, L means an ethoxy group, a chlorine or bromine atom, and m is equal to 1 or 2, as an alkyl source or else zinc dimethyl as a methyl source, which contains in addition catalytic amounts of one or more copper(I) and/or copper(II) compounds and one (or more) silyl reagent(s) of general formula III R.sup.1 R.sup.2 R.sup.3 SiZ (III), in which R.sup.1, R.sup.2 and R.sup.3 are as defined herein, as well as a process for 1,4-addition of an alkyl group to an .alpha.,.beta.-unsaturated ketone or an .alpha.,.beta.-double unsaturated ketone or to an .alpha.,.beta.-unsaturated aldehyde with use of the agent according to the invention. The alkylating agent yields biologically active compounds in excellent yields and the new alkylating agent/process is distinguished by its environmental compatibility based on a CKW (chlorinated hydrocarbon)-free reaction medium.
本发明揭示了一种烷基化剂,其包含铝试剂Alk.sub.3-m AlL.sub.m,其中Alk表示甲基、乙基、n-或i-丙基、n-、i-或叔丁基、戊基、己基、庚基或辛基基团,这些基团也都可以是支链的,L表示乙氧基、氯或溴原子,m等于1或2,作为烷基来源,或者是二甲基锌作为甲基来源,此外还包含一定量的一种或多种铜(I)和/或铜(II)化合物和一种(或多种)通式III R.sup.1 R.sup.2 R.sup.3 SiZ (III)的硅烷试剂,其中R.sup.1、R.sup.2和R.sup.3如本文所定义,以及使用本发明的烷基化剂对α,β-不饱和酮或α,β-双不饱和酮或α,β-不饱和醛进行1,4-加成的方法。该烷基化剂以优异的产率产生生物活性化合物,新的烷基化剂/过程以其无氯烃反应介质的环境兼容性而著称。