Total Synthesis of Trisaccharide Repeating Unit of <i>Staphylococcus aureus</i> Strain M
作者:Archana A. Shirsat、Diksha Rai、Balasaheb K. Ghotekar、Suvarn S. Kulkarni
DOI:10.1021/acs.orglett.3c00997
日期:2023.4.28
An efficient total synthesis of a conjugation-ready trisaccharide repeating unit of Staphylococcus aureus strain M is reported here. The main challenges involved in this synthesis are the procurement of rare sugars (d-FucNAc and d-GalNAcA) and installation of consecutive 1,2-cis-glycosidic linkages between them. Stereoselective 1,2-cis glycosylation with the linker acceptor was achieved with easily
此处报道了金黄色葡萄球菌菌株 M的可结合三糖重复单元的有效全合成。该合成中涉及的主要挑战是稀有糖( d -FucNAc 和d -GalNAcA)的采购以及它们之间连续的 1,2-顺式-糖苷键的安装。通过采用 DMF 调节的预激活糖基化方法,使用容易获得的亚苄基保护的d-半乳糖胺硫代糖苷实现了与接头受体的立体选择性1,2-顺式糖基化。连续的 1,2-顺式在溶剂参与的帮助下建立了联系。羧酸功能是通过二糖基团上的糖基化后氧化引入的。三糖重复单元的全合成以最长的24步线性序列完成,总收率为4.5%。