An efficient synthesis of l-idose and l-iduronic acid thioglycosides and their use for the synthesis of heparin oligosaccharides

Abstract Efficient preparations of thioglycoside derivatives of l -idose and l -iduronic acid are described. The method avoids the tedious chromatographic separations of furanose and pyranose anomeric mixtures, and affords the thioglycosides in a stereoselective manner. The l -idose and l -iduronic acid thioglycosides having combinations of different protecting groups proved to be efficient glycosyl donors in the synthesis of heparin disaccharides.