Abstract Starting from allyl 2-O-acetyl-3-O-benzyl-α-l-rhamnopyranoside (3), allyl (2, 3, 4, 6- tetra-O-benzoyl-β-d-galactopyranosyl)-(1→ 4)-2-O-acetyl-3-O-benzyl-α-l-rhamnopyranoside (5) was synthesized under Helferich conditions. Module 5 was converted to 2, 3, 4, 6-tetra-O- benzoyl-β-d-galactopyranosyl-(1→ 4)-2-O-acetyl-3-O-benzyl-α-l-rhamnopyranosyl bromide (8) which was then coupled with methyl (allyl 2, 3-di-O-benzyl-β-d-galactopyranosid) ...
