The Stereoselective Dehydrative α-Glucosylation Using 6-O-Acetyl- and 6-O-p-Nitrobenzoyl-2,3,4-tri-O-benzyl-d-glucopyranoses

The stereoselective synthesis of α-linked glucobiose derivatives using 6-O-acetyl- or 6-O-p-nitrobenzoyl-2,3,4-tri-O-benzyl-d-glucopyranose and a ternary mixture of p-nitrobenzenesulfonyl chloride, silver trifluorometh-anesulfonate, and triethylamine in dichloromethane is described.