Concise synthesis of an arabinofuranose hexasaccharide present in the cell wall of Mycobacterium tuberculosis
摘要:
Mycobacterium cell wall consists of three major polysaccharide portions and arabinofuranose (Araf) is present in two of the major portions, arabinogalactan (AG) and lipoarabinomannan (LAM). A peculiar Araf hexasaccharide possessing two beta-linked Araf units are present in both AG and LAM polysaccharides. Herein, we report an efficient and concise synthesis of this Araf hexasaccharide using single starting 3,5-TIPDS protected Araf thioglycoside precursor. Double beta-glycosylation was achieved using strained cyclic 2-p-methoxybenzyl-3,5-TIPDS Araf thioglycoside donor. (C) 2012 Elsevier Ltd. All rights reserved.
Concise synthesis of an arabinofuranose hexasaccharide present in the cell wall of Mycobacterium tuberculosis
摘要:
Mycobacterium cell wall consists of three major polysaccharide portions and arabinofuranose (Araf) is present in two of the major portions, arabinogalactan (AG) and lipoarabinomannan (LAM). A peculiar Araf hexasaccharide possessing two beta-linked Araf units are present in both AG and LAM polysaccharides. Herein, we report an efficient and concise synthesis of this Araf hexasaccharide using single starting 3,5-TIPDS protected Araf thioglycoside precursor. Double beta-glycosylation was achieved using strained cyclic 2-p-methoxybenzyl-3,5-TIPDS Araf thioglycoside donor. (C) 2012 Elsevier Ltd. All rights reserved.
Silver-assisted gold-catalyzed solid phase synthesis of linear and branched oligosaccharides
作者:Yogesh Sutar、Madhuri Vangala、Srinivas Hotha
DOI:10.1039/d1cc06270k
日期:——
Unlike solidphasesynthesis of peptides, synthesis of oligosaccharides by solidphase methods is lagging behind owing to inherent challenges faced while executing glycosidations. In this communication, silver-assisted gold-catalyzed glycosidations are found to be excellent for solidphase oligosaccharide synthesis. Glycosidations under catalytic conditions, one time coupling with four equivalents