Synthesis of Laminarin Oligosaccharide Derivatives Havingd‐Arabinofuranosyl Side‐Chains
摘要:
An efficient glycosylation strategy was applied in the synthesis of beta-D-glucopyranosyl-(1-->3)-[alpha-D-arabinopyranosyl-(1-->4)]-beta-D-glucopyranosyl-(1-->3)-beta-D-glucopyranosyl-(1-->3)-[alpha-D-arabinopyranosyl-(1-->6)]-D-glucopyranose to secure beta-D-(1-->3) glycosidic bond formation between glucopyranosyl residues. The new strategy using a 4,6-O-benzylidenated acceptor avoided generation of the alpha major isomer in the attempted beta-D-(1-->3) glycosylation under standard glycosylation conditions. The hexasaccharide we prepared showed about 30% tumor growth inhibition towards S180 model study.
Synthesis of Laminarin Oligosaccharide Derivatives Havingd‐Arabinofuranosyl Side‐Chains
摘要:
An efficient glycosylation strategy was applied in the synthesis of beta-D-glucopyranosyl-(1-->3)-[alpha-D-arabinopyranosyl-(1-->4)]-beta-D-glucopyranosyl-(1-->3)-beta-D-glucopyranosyl-(1-->3)-[alpha-D-arabinopyranosyl-(1-->6)]-D-glucopyranose to secure beta-D-(1-->3) glycosidic bond formation between glucopyranosyl residues. The new strategy using a 4,6-O-benzylidenated acceptor avoided generation of the alpha major isomer in the attempted beta-D-(1-->3) glycosylation under standard glycosylation conditions. The hexasaccharide we prepared showed about 30% tumor growth inhibition towards S180 model study.