An Oxidation–Amidation Approach for the Synthesis of Glycuronamides

A route for the synthesis of glycuronamides via the intermediacy of 6-S-tolyl-substituted glycosides and uronic acid thioesters, is reported. The route, which is compatible with a variety of carbohydrate residues and protecting groups, was used to synthesize the repeating unit of the E. coli K54 capsular polysaccharide.