1,2,5-ortho esters of d-arabinose as versatile arabinofuranosidic building blocks. Concise synthesis of the tetrasaccharidic cap of the lipoarabinomannan of Mycobacterium tuberculosis
1,2,5-ortho esters of d-arabinose as versatile arabinofuranosidic building blocks. Concise synthesis of the tetrasaccharidic cap of the lipoarabinomannan of Mycobacterium tuberculosis
作者:Toufiq Bamhaoud、Sylvie Sanchez、Jacques Prandi
DOI:10.1039/b000873g
日期:——
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.
Synthesis and NMR spectroscopic analysis of acylated pentasaccharide fragments of mycobacterial arabinogalactan
作者:Chunjuan Liu、Michele R. Richards、Todd L. Lowary
DOI:10.1039/c0ob00423e
日期:——
hydrophobic mycolic acids, forming a dense protective barrier of low permeability. In a previous article, we probed this “flexible scaffold hypothesis” through the synthesis and NMR analysis of di- and trisaccharide fragments of the mAG acylated with linear fatty acids. However, we saw few conformational changes due to the presence of the acyl chains. We proposed that branched pentasaccharide glycolipids
A comprehensive glycosylation system for the elaboration of oligoarabinofuranosides
作者:Sylvie Sanchez、Toufiq Bamhaoud、Jacques Prandi
DOI:10.1016/s0040-4039(00)01273-9
日期:2000.9
1,2,5-Orthoesters of D-arabinose are key compounds for the construction of a glycosylation system that allows the stereoselective synthesis of any interglycosidic linkage between arabinofuranosidic units. Application to the synthesis of a pentaarabinofuranoside of the mycobacterial cell wall is also described. (C) 2000 Elsevier Science Ltd. All rights reserved.