Stereochemistry in the Synthesis and Reaction of <i>e</i><i>xo</i>-Glycals
作者:Wen-Bin Yang、Yu-Ying Yang、Yu-Feng Gu、Shwu-Huey Wang、Che-Chien Chang、Chun-Hung Lin
DOI:10.1021/jo0255227
日期:2002.5.1
Two general methods are explored for the stereoselective synthesis of exo-glycals. One method utilizes a nucleophilic addition of fully protected sugar lactones of gluco-, galacto-, and manno-types, followed by the subsequent dehydration, to give the desired exo-glycals with (Z)-configuration. The other method proceeds with selenylation of C-glycosides in a stereoselective manner. The subsequent selenoxide