Convergent synthesis of a common pentasaccharide corresponding to the O-antigen of Escherichia coli O168 and Shigella dysenteriae type 4
A convenient synthetic strategy of the common acidic pentasaccharide repeating unit corresponding to the O-antigen of enterotoxigenic E. coli O168 and Shigella dysenteriae type 4 has been successfully developed. A stereoselective [2+3] block glycosylation method has been exploited to get the target pentasaccharide derivative. Most of the synthetic intermediates were solid and prepared in high yields from commercially available reducing sugars following a series of protection-deprotection reactions. A α-D-mannose moiety has been used as the source of α-D-glucosamine moiety. A late-stage TEMPO mediated selective oxidation reaction finally resulted in the pentasaccharide containing a glucuronic acid unit.
Get Best Price for1304695-93-94-methoxyphenyl (3,4-di-O-acetyl-2-O-benzyl-α-L-fucopyranosyl)-(1->3)-4,6-O-benzylidene-2-deoxy-2-N-phthalimido-β-D-glucopyranoside