Novel Synthesis of Disaccharides Containing the 2-Amino-2-deoxy-(beta)-D-glucopyranosyl Unit and L-Glycero-D-Manno- and 7-Deoxy-L-Glycero-D-Galacto-heptopyranoses

Stereocontrolled syntheses of immunologically relevant heptopyranose disaccharides were achieved in excellent yields by the trimethylsilyl triflate promoted glycosylation of the donor 1,3,4,6-tetra-O-acetyl-2-N-allyloxycarbonyl-2-amino-2-deoxy-(beta)-Dglucopyranose with the adequate acceptors.