Synthesis of the repeating unit of the lipoteichoic acid of Streptococcus pneumoniae
作者:Christian Marcus Pedersen、Ignacio Figueroa-Perez、Artur J. Ulmer、Ulrich Zähringer、Richard R. Schmidt
DOI:10.1016/j.tet.2011.11.088
日期:2012.1
The lipoteichoic acid repeating unit of Streptococcus pneumoniae is a complex pseudopentasaccharide (3). It consists of one ribitol-phosphate, one 2-acetamino-4-amino-2,4,6-trideoxy-galactose, one glucose and two galactosamine residues each differently linked, but both carrying one phosphocholine substituent, at position 6. Suitable building blocks (6–10) for efficient and diastereocontrolled ligations
肺炎链球菌的脂磷壁酸重复单元是复杂的假五糖(3)。它由一个核糖磷酸酯,一个2-乙酰氨基-4-氨基-2,4,6-三苯氧基-半乳糖,一个葡萄糖和两个半乳糖胺残基组成,每个残基都不同地连接,但都在6位带有一个磷酸胆碱取代基。设计了用于有效和非对映控制的连接的嵌段(6 – 10),从而在完全脱保护后提供了高纯度的目标分子。生物学测试表明,缺少脂质部分的重复单元3不会刺激人类单核细胞(hMNCs)的促炎反应。