Synthesis of <scp>l</scp>-<i>glycero</i>- and <scp>d</scp>-<i>glycero</i>-<scp>d</scp>-<i>manno</i>-Heptose Building Blocks for Stereoselective Assembly of the Lipopolysaccharide Core Trisaccharide of <i>Vibrio parahemolyticus</i> O2
作者:Junchang Wang、Jingjing Rong、Qixin Lou、Yirong Zhu、You Yang
DOI:10.1021/acs.orglett.0c02961
日期:2020.10.16
Synthesis of bacterial cell surface l-glycero-d-manno-heptose (l,d-Hep)- and d-glycero-d-manno-heptose (d,d-Hep)-containing higher carbon sugars is a challenging task. Here, we report a convenient and efficient approach for the synthesis of the l,d-Hep and d,d-Hep building blocks. Using l-lyxose and d-ribose as starting materials, this approach features diastereoselective Mukaiyama-type aldol reactions
细菌细胞表面的合成升-甘油基- d -甘露-heptose(升,d -Hep) -和d -甘油基- d -甘露-heptose(d,d -Hep)含更高碳糖是一个具有挑战性的任务。在这里,我们报告了一种合成l , d -Hep 和d , d -Hep 构建块的方便有效的方法。使用l -lyxose 和d-核糖作为起始材料,该方法以非对映选择性 Mukaiyama 型羟醛反应为关键步骤。在合成的l , d -Hep 和d , d -Hep 构件的基础上,我们首次立体选择性合成了独特的 α- l , d -Hep-(1→3)-α- d , d -Hep -(1→5)-α-Kdo副溶血性弧菌O2脂多糖核心三糖。