1,2,5-ortho esters of D-arabinose were found to be
ideally suited building blocks for the stereoselective formation of α
and β arabinofuranosidic linkages after nucleophilic opening of the
orthoester with oxygen and sulfur nucleophiles; the tetrasaccharidic cap of
the lipoarabinomannan of Mycobacterium tuberculosis was then
synthesized in a highly convergent manner.
研究发现,
D-阿拉伯糖的1,2,5-邻醚酯在氧和
硫亲核试剂的作用下开环后,是形成α和β阿拉伯
呋喃糖苷键的理想手性砌块;随后,以高度汇聚的方式合成了结核分枝杆菌脂阿拉伯
甘露聚糖的四糖帽。