Glycosylation Using a One-Electron-Transfer Homogeneous Reagent: A Novel and Efficient Synthesis of β-Linked Disaccharides

Variously substituted S-glycosides react in acetonitrile with the primary or secondary hydroxy group of O-glycosides in the presence of tris (4-bromophenyl)ammoniumyl hexachloroantimonate, a stable and commerically available radical cation, to give the corresponding ß-O-linked disaccharides in high yield.