Reaction of α-amino esters and α-amino ester imines with thiiranium ion intermediates. Application to the synthesis of new potential aminopeptidase inhibitors and mechanistic implications
作者:Duncan M Gill、Neil A Pegg、Christopher M Rayner
DOI:10.1016/s0040-4020(97)00060-4
日期:1997.3
situ from 2,3-epoxy sulfides, to give an iminium ion which can be readily hydrolysed by aqueous base to liberate a secondary amine, the product of selective monoalkylation of the primary amino group. Overall yields for this process are only moderate, but can be improved by use of α-amino esters themselves as nucleophiles at low temperature. Interesting reactivity profiles of the thiiranium ion intermediates
衍生自α-氨基酯的亚胺与2,3-环氧硫化物就地生成的噻吩离子反应,生成亚胺离子,该碱离子易于被碱水溶液水解以释放仲胺,该胺是伯氨基选择性单烷基化的产物团体。该方法的总产率仅中等,但是可以通过在低温下将α-氨基酯本身用作亲核试剂来提高。观察到了噻吩鎓离子中间体有趣的反应性概况,并讨论了其对所涉及的反应性中间体性质的影响。从这些反应中获得的产物是用于合成与α-硫磺抑制素和其他已知有效的氨基肽酶抑制剂有关的化合物的模型系统。