Synthesis of Partial Structural Unit of Lichenan

Abstract

Two routes have been developed for the synthesis of pentasaccharide, methyl O-(β-D-glucoranosl)-(1→4)-O-β-D-glucopyranosyl-(1→3)-O-β-D-glucopyranosyl-(1→4)-Op-β-D-glucopyranosyl, (1→4)-β-O-D-glucopyranoside which constitutes the repeating unit of the lichen (Getreiria islandica) polysaccharide lichenan having antitumor activity.