作者:Ralph Nicholas Salvatore、Advait S. Nagle、Kyung Woon Jung
DOI:10.1021/jo010643c
日期:2002.2.1
A novel method for the mono-N-alkylation of primary amines, diamines, and polyamines was developed using cesium bases in order to prepare secondary amines efficiently. A cesium base not only promoted alkylation of primary amines but also suppressed overalkylations of the produced secondary amines. Various amines, alkyl bromides, and alkyl sulfonates were examined, and the results demonstrated this
为了有效地制备仲胺,使用铯碱开发了一种用于伯胺,二胺和多胺的单N-烷基化的新方法。铯碱不仅促进伯胺的烷基化,而且抑制产生的仲胺的过度烷基化。检查了各种胺,烷基溴化物和烷基磺酸盐,结果表明该方法具有较高的化学选择性,比单烷基化更有利于单-N-烷基化。特别地,使用空间要求高的底物或氨基酸衍生物可专门提供仲胺,在拟肽合成中具有广泛的应用。