Process for introducing a substituent selected from branched- or straight-chain alkyl radicals having from 1 to 12 carbon atoms, aralkyl or cycloalkyl radicals in which the alkyl moiety has from 1 to 4 carbon atoms, into a carbon chain bearing a stable functional group the said carbon chain having at least one proton in .alpha.-position in relation to this functional group, process whereby, in a first step, this carbon chain is reacted with a complex base comprising a mixture of alkali metal amide and alkali metal alcoholate suspended in an anhydrous organic solvent to provide temporarily a carbanion, then in a second step this carbanion is reacted in an anhydrous organic solvent with an alkyl, aralkyl or cycloalkyl halide corresponding to the substituent to be introduced.
将选择自支链或直链烷基基团(碳原子数为1至12)、芳基烷基或环烷基基团的取代基引入具有至少一个质子位于与该功能基相关的α-位置的碳链的过程,其中该碳链至少具有一个稳定的功能基,该过程包括以下步骤:在第一步中,将含有一种混合物的复杂碱基(包括悬浮在无
水有机溶剂中的碱
金属胺和碱
金属醇盐)与该碳链反应,暂时形成一个碳负离子,然后在第二步中,在无
水有机溶剂中,将该碳负离子与对应于待引入取代基的烷基、芳基烷基或环烷基卤化物反应。