N-Alkylation of amines suffers from competing over alkylations. At the same time, use of strong base and other harsh conditions greatly limits providing a practical, generalized and selective procedure. Activated silica gel has been found to promote N-alkylations of amines. Here, we studied N-alkylation of amines with various types of alkyl halides, which finally constitute practical, highly selective and eco-friendly conditions for mono- or bis-alkylated amines at ambient temperature with recyclability of silica.
胺类的N-烷基化面临竞争性过烷基化的问题。同时,强碱和其他苛刻条件的使用大大限制了提供实际、普遍和选择性的程序。研究发现活化
硅胶能够促进
胺类的N-烷基化。在此,我们研究了与各种烷基卤化物作用的
胺类N-烷基化,最终构建了在环境温度下、具有可再生
硅胶的单烷基或双烷基化胺的实用、高选择性和环保条件。