Total Synthesis of a Chimeric Glycolipid Bearing the Partially Acetylated Backbone of Sponge-Derived Agminoside E
作者:Kevin Muru、Maude Cloutier、Arianne Provost-Savard、Sabrina Di Cintio、Océane Burton、Justin Cordeil、Marie-Christine Groleau、Jean Legault、Eric Déziel、Charles Gauthier
DOI:10.1021/acs.joc.1c01907
日期:2021.11.5
We describe the total synthesis of a chimeric glycolipid bearing both the partially acetylated backbone of sponge-derived agminoside E and the (R)-3-hydroxydecanoic acid chain of bacterial rhamnolipids. The branched pentaglucolipid skeleton was achieved using a [3 + 2] disconnection approach. The β-(1 → 2) and β-(1 → 4)-glycosidic bonds were synthesized through a combination of NIS/Yb(OTf)3- and TMSOTf-mediated
我们描述了一种嵌合糖脂的全合成过程,该糖脂具有海绵衍生的 agminoside E 的部分乙酰化主链和细菌鼠李糖脂的 ( R )-3-羟基癸酸链。使用 [3 + 2] 断开方法实现了支链五糖脂骨架。β-(1 → 2) 和 β-(1 → 4)-糖苷键是通过结合 NIS/Yb(OTf) 3 - 和 TMSOTf 介导的硫代甲苯基立体选择性糖基化,N-苯基三氟乙酰亚胺酯和三氯乙酰亚胺酯供体。后期五乙酰化,(2-叠氮甲基)苯甲酰基的施陶丁格还原,然后连续流动微流体氢解完成了结构简化的糖脂的全合成,其聚糖部分的部分乙酰化模式与agminoside E相同。我们的研究为海绵来源的agminosides的全合成和了解它们在海绵中的生物学功能奠定了基础。