Enantioselective Syntheses of Morpholines and Their Homologues via S<sub>N</sub>2-Type Ring Opening of Aziridines and Azetidines with Haloalcohols
作者:Manas K. Ghorai、Dipti Shukla、Kalpataru Das
DOI:10.1021/jo901297d
日期:2009.9.18
yield and enantioselectivity of a variety of substituted nonracemic morpholines and their homologues is described. The reaction proceeds via an SN2-type ring opening of activated aziridines and azetidines by suitable halogenated alcohols in the presence of Lewis acid followed by base-mediated intramolecular ring closure of the resulting haloalkoxy amine.
描述了一种高区域和立体选择性策略,用于高产率和对映选择性地合成各种取代的非外消旋吗啉及其同系物。通过S进行反应Ñ在路易斯酸存在下2型开环活性氮丙啶和氮杂环丁烷的通过合适的卤代醇,然后将所得卤代烷氧基胺的碱介导的分子内闭环。