[Synthesis of oligosaccharide fragments of the capsular polysaccharide of Streptococcus pneumoniae type 3].

Di-, tri- and tetrasaccharide fragments of the linear chain of the capsular polysaccharide of Streptococcus pneumoniae type 3 consisting of glucose and glucuronic acid residues connected with beta 1----3- and beta 1----4-glycosidic linkage have been synthesised. A new method for selective deprotection of C3-hydroxyl group in the glucopyranuronic acid moiety is proposed.