Synthesis of Pentasaccharide Fragments Related to theO-Specific Polysaccharide ofShigella flexneri Serotype 1a
作者:Gregor Lemanski、Thomas Ziegler
DOI:10.1002/ejoc.200600078
日期:2006.6
The synthesis of the pentasaccharide 5-aminopentylglycosides α-L-Rhap-(1→3)-[α-D-Glcp-(1→4)]-β-D-GlcpNAc-(1→2)-α-L-Rhap-(1→2)-α-L-Rhap-1-O-(CH2)5NH2 (29) andα-L-Rhap-(1→3)-α-L-Rhap-(1→3)-[α-D-Glcp-(1→4)]-β-D-GlcpNAc-(1→2)-α-L-Rhap-1-O-(CH2)5NH2 (28), related to the O-specific polysaccharide of Shigella flexneri serotype 1a by coupling of the suitably protected trisaccharides α-D-Glcp-(1→4)-β-D-Glc
五糖5-氨基戊基糖苷α-L-Rhap-(1→3)-[α-D-Glcp-(1→4)]-β-D-GlcpNAc-(1→2)-α-L-的合成Rhap-(1→2)-α-L-Rhap-1-O-(CH2)5NH2(29)和α-L-Rhap-(1→3)-α-L-Rhap-(1→3)-[ α-D-Glcp-(1→4)]-β-D-GlcpNAc-(1→2)-α-L-Rhap-1-O-(CH2)5NH2 (28),与O-特异性多糖有关通过偶联适当保护的三糖 α-D-Glcp-(1→4)-β-D-Glcp(1→2)-α-L-Rhap-1-O-(CH2)5NH2 ( 23) 和 α-L-Rhap-(1→3)-[α-D-Glcp-(1→4)]-β-D-Glcp-1-SPh (26) 与相应的鼠李糖苷 α-L- Rhap-(1→3)-α-L-Rhap-1-SEt (17) 和 α-L-Rhap-(1→3)-α-L-Rhap-1-O-(CH2)5NH2