Abstract 2-O-[4-O-(2-Acetamido-2-deoxy-β-d-mannopyrasonyl)-α-d-glucopyranosyl]-α, β-l- rhamnopyranose, a structural component of the capsular polysaccharide of Streptococcus pneumoniae type 19F, has been synthesized by sequential glycosylation reactions using the glycosyl acceptor 2, 2, 2-trichloroethyl 3, 4-di-O-benzyl-α-l-rhamnopyranoside (prepared from the known 2-O-acetyl-3, 4-di-O-benzyl-α-l-rhamnopyranosyl chloride), and the ...
