A Rapid Synthesis of Pyranoid Glycals Promoted by β-Cyclodextrin and Ultrasound
作者:Jinzhong Zhao、Huawu Shao、Xin Wu、Shaojing Shi
DOI:10.1002/cjoc.201180263
日期:2011.7
procedure for the synthesis of glycals from glycosyl bromides with very low zinc dust loading (1.5 equiv.) is described. The process is activated by β‐cyclodextrin and ultrasound. Based on 19 samples, this method has been demonstrated to be highly effective for a broad range of glycosyl bromides, including acid‐ or base‐sensitive and disaccharide glycosyl bromides. A yield of 85%–96% of glycals was obtained