Chemistry of 1-Alkoxy-1-glycosyl Radicals: Formation of β-Mannopyranosides by Radical Decarboxylation and Decarbonylation of <i>manno</i>-Heptulosonic Acid Glycoside Derivatives
作者:David Crich、Jae-Taeg Hwang、Hongwei Yuan
DOI:10.1021/jo960799q
日期:1996.1.1
A method for the preparation of highly enriched beta-mannopyranosides is described. A glycosyl donor 28 is prepared from tetraallyl mannonolactone by standard means and coupled to a number of primary carbohydrate alcohols, resulting in the isolation in excellent yields of axial disaccharides. Following exchange of the allyl groups for acetyl esters, the furan is oxidatively cleaved with catalytic RuO(2)