Synthesis of tryptophans by alkylation of chiral glycine enolate equivalents with quaternary gramines
作者:Matiss Reinfelds、Konstantins Kalinins、Dace Katkevica、Ronalds Zemribo、Martins Katkevics
DOI:10.1016/j.tetlet.2015.09.017
日期:2015.10
source of the 3-methylindole fragment for diastereoselective alkylation. The best yields and stereoselectivity were obtained for the alkylation of a chiral William’s morpholinone enolate. Based on this transformation, a general method for the synthesis of enantiopure, indole ring substituted tryptophan derivatives was developed with good overall yields.
发现季胺是非对映选择性烷基化的3-甲基吲哚片段的合适来源。对于手性William's吗啉代烯醇烯酸酯的烷基化,可获得最佳收率和立体选择性。基于该转化,开发了具有良好总收率的对映体纯的,吲哚环取代的色氨酸衍生物的合成的通用方法。