One-Pot Synthesis and Benzylation of Galactose, Glucose, and Mannose 1,2-Orthoesters

Experimental Methods ...........................................................................................204 General Methods ...............................................................................................204 3,4,6-Tri-O-benzyl-1,2-O-(1-methoxyethylidene)-α-d-glucopyranose (3a) .....205 3,4,6-Tri-O-benzyl-1,2-O-(1-methoxyethylidene)-α-d-galactopyranose (3c) ......205 3,4,6-Tri-O-benzyl-1,2-O-(1-methoxyethylidene)-β-d-mannopyranose (3e) ......206 3,4,6-Tri-O-benzyl-1,2-O-(1-methoxybenzylidene)-α-d-glucopyranose (3b) ......206 3,4,6-Tri-O-benzyl-1,2-O-(1-methoxybenzylidene)-α-dgalactopyranose (3d) .....................................................................................207 3,4,6-Tri-O-benzyl-1,2-O-(1-methoxybenzylidene)-β-d-mannopyranose (3f) .....207