An Efficient Method for the Synthesis of 2,6-Branched Galacto-Oligo­saccharides and Its Applications to the Synthesis of Three Tetrasaccharides and a Hexasaccharide Related to the Arabinogalactans (AGs)

Abstract

An efficient method for the synthesis of 2,6-branched galacto-oligosaccharides has been developed by using 6-O-Ac-2,3,4-tri-O-Bz-α-d-galactopyranosyl trichloroacetimidate, 2,6-di-O-Ac-3,4-di-O-Bz-α-d-galactopyranosyl trichloroacetimidate and 2-O-Ac-3,4,6-tri-O-Bz-α-d-galactopyranosyl trichloroacetimidate as synthons. Three tetrasaccharides and a hexasaccharides related to AGs from plants were readily prepared using this method.