Abstract
A lactosaminyl donor, 3,6-di- O-acetyl-2-deoxy-2-phthalimido-4- O-(2,3,4,6-tetra- O-acetyl-β- d-galactopyranosyl)-β- d- glucopyranosyl chloride, was synthesized in 10 steps, starting from 1,3,4,6-tetra- O-acetyl-2-deoxy-2-phthalimido-β- d-glucopyranose. Benzyl 3,6-di- O-benzyl-2-deoxy-2-phthalimido-β- d-glucopyranoside was prepared by regioselective benzylation at the primary hydroxyl group by the stannyl method, and was used as a key intermediate. ▪
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