Synthesis of the tetrasaccharide repeating unit of the antigen from Klebsiella type 20

Article abstract of DOI:10.1016/0008-6215(95)00064-Z

Starting from D-mannose, D-galactose and D-glucuronolactone, two disaccharide blocks, namely methyl 4,6-di-O-benzyl-2-O-(2,3,4,6-tetra-O-benzyl-β-D-galactopyranosyl)-α- D-mannopyranoside, acting as acceptor, and ethyl 4,6-di-O-acetyl-2-O-allyl-3-O-(methyl