EDC mediated coupling of the 4-O-succinoyl glycosyl azide 2 with glycosylamine 3 gave the protected glycosylazide 4. Hydrogenation of 4 afforded the glycosylamine 5. Chemoselective hydrolysis of the reducing end glycosylamine, followed by hydrogenation afforded N, N ″-diacetylpseudochitotriose 7. Coupling of 5 with heterocyclic or with Cbz protected aliphatic amino acids yielded glycosyl amides 8–12. Deprotection of 11 and 12 ...