Efficient Synthesis of Six Tri- to Hexasaccharide Fragments of <i>Shigella flexneri</i> Serotypes 3a and/or X O-Antigen, Including a Study on Acceptors Containing <i>N</i>-Trichloroacetylglucosamine versus <i>N</i>-Acetylglucosamine
作者:Julien Boutet、Catherine Guerreiro、Laurence A. Mulard
DOI:10.1021/jo802127z
日期:2009.4.3
resulting hexasaccharide provided BAcCD(E)AB and BCD(E)AB, respectively. All of the synthesized oligosaccharides are parts of the O-antigen of Shigellaflexneri 3a, a prevalent serotype. Moreover, the non-O-acetylated fragments are also parts of the S. flexneriserotype X O-antigen.
六三-到六糖的片断的2) - [α- d -Glc p - (1→3)] - α-升-RHA p - (1→2)-α-升-RHA p - (1→ 3)-[Ac→2] -α -1 - Rha p-(1→3)-β- d- Glc p NAc-(1→} n聚合物([ (E)AB Ac CD ] n)的合成他们丙基苷。所有目标共享(E)AB序列,继使用彻查ň -trichloroacetylglucosamine-与ñ含3-乙酰基葡糖胺的三糖和四糖受体,成功的策略是基于三氯乙酰亚氨酸酯化学,用作永久性N保护的三氯乙酰基和作为所选结构单元的临时和/或永久异头保护基的烯丙糖苷配基的有效组合。使用在2 A处正交保护的EAB中间体可提供三糖靶标和受体12,将其与链终止剂D缩合,然后完全脱保护,得到四糖D(E)AB。或者,用D逐步将12糖基化供体在位置3的选择性去块兼容d和2- ö乙酰Ç施主以下OH-3的
Glycoconjugates and use thereof as vaccine against Shigella flexneri serotype 3a and X
申请人:Mulard Laurence
公开号:US08815239B2
公开(公告)日:2014-08-26
The present invention relates to compounds derived from sugars which reproduce the epitopes of Shigella flexneri serotypes 3a and X and to the use thereof for the preparation of vaccine compositions. More specifically, the subject matter of the present invention relates to novel glycoconjugated compounds comprising oligosaccharides or polysaccharides described hereinafter, to the method for synthesizing these oligosaccharides or polysaccharides and glycoconjugates, to derivatives of these oligosaccharides or polysaccharides, to compositions containing same, and also to the use of the glycoconjugates for vaccination purposes. Finally, the present invention relates to methods for diagnosing a Shigella flexneri infection using one or more oligosaccharides or polysaccharides or conjugates thereof.