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.