作者:Spencer Knapp、Brian A. Kirk
DOI:10.1016/j.tetlet.2003.08.063
日期:2003.10
The reaction of 1,2,3,4,6-penta-O,S,O,O,O-acetyl-2-thio-beta-D-glucopyranose with glycosyl acceptors in the presence of trimethylsilyl triflate leads to the beta-disaccharides exclusively, owing to especially avid anchimeric assistance by the 2-thio-S-acetyl group. Optional reductive removal of -SAc with Ra-Ni gives the corresponding 2'-deoxy-beta-disaccharides. (C) 2003 Elsevier Ltd. All rights reserved.