Synthesis of N-protected azaoligosaccharides and their cyclic derivatives

Azaoligosaccharides are prepared through the glycosylation of nojirimycin derivatives with catalytic amounts of TMSOTf. Also, the 1-6', V-6-cyclic azadisaccharides are successfully synthesized, and their one-pot syntheses are demonstrated. (c) 2005 Elsevier Ltd. All rights reserved.