327162-38-9

Upstream product

• 327162-29-8 methyl (3,4-di-O-benzyl-α-L-rhamnopyranosyl)-(1->3)-[2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl-(1->4)]-2-O-benzoyl-α-L-rhamnopyranoside 
• 161545-19-3 3,4,6-tri-O-acetyl-2-deoxy-2-trichloroacetamido-α/β-D-glucopyranose trichloroacetimidate 

Relevant academic research and scientific papers

Blockwise Approach to Fragments of the O-Specific Polysaccharide of Shigella flexneri Serotype 2a: Convergent Synthesis of A Decasaccharide Representative of a Dimer of the Branched Repeating Unit

The D′A′B′(E′)C′DAB(E)C decasaccharide representative of a dimer of a frame-shifted pentasaccharide repeating unit of the O-specific polysaccharide of Shigella flexneri 2a was synthesized as its methyl glycoside by condensing a pentasaccharide donor (D′A′B′ (E′)C′) and a pentasaccharide acceptor (DAB(E)C-OMe). Several convergent routes to these two building blocks, involving either the AB linkage or the BC linkage as the disconnection site, were evaluated in comparison to the linear strategy. The latter was preferred. It is based on the use of the trichloroacetimidate chemistry. The target branched oligosaccharide was designed to probe the recognition at the molecular level of the natural polysaccharide by protective monoclonal antibodies.

Linear synthesis of the methyl glycosides of tetra-and pentasaccharide fragments specific for the Shigella flexneri serotype 2a O-antigen

Starting from the known methyl 2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl-(1→4)-2-O-benzoyl-α- L-rhamnopyranoside, the stepwise linear syntheses of methyl α-L-rhamnopyranosyl-(1→2)-α-L-rhamnopyranosyl-(1→ 3)-[α-D-glucopyranosyl-(1→ 4)]-α-L-rhamnopyranoside