title: A one-pot strategy for synthesis of 5-O-(alpha-D-arabinofuranosyl)-6-O-(beta-D-galactofuranosyl)-D-galactofuranose present in motif E of the Mycobacterium tuberculosis cell wall.
abstract: 5-O-(Alpha-D-arabinofuranosyl)-6-O-(beta-D-galactofuranosyl)-D-galactofuranose 6 present in motif E of the Macobacterium tuberculosis cell wall has been regio- and stereospecifically synthesized using 3-O-benzoyl-1,2-O-isopropylidine-alpha-D-galactofuranose (10) as the glycosyl acceptor by the trichloroacetamidate method in a one-pot manner. The diol glycosyl acceptor 10 was smoothly derived from 1,2:5,6-di-O-isopropylidene-alpha-D-galactofuranose (8) by 3-O-benzoylation and then selective 5,6-O-deacetonation. The preparation of 8 was greatly improved by increasing the ratio of DMF to acetone and using a solid-supported catalyst.
authors.affiliation: Department of Chemistry, Tsinghua University, Beijing 100084, China.
authors.forename: Hairong
authors.initials: H
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Ning
mesh_terms: D002384:Catalysis; D002473:Cell Wall / Q000737:chemistry; D002625:Chemistry, Organic / Q000379:methods*; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D009169:Mycobacterium tuberculosis / Q000737:chemistry*; D011135:Polysaccharides, Bacterial / Q000737:chemistry*; D014312:Trisaccharides / Q000138:chemical synthesis*
chemical_list: C476620:5-O-(arabinofuranosyl)-6-O-(galactofuranosyl)-galactofuranoside; D007202:Indicators and Reagents; D011135:Polysaccharides, Bacterial; D014312:Trisaccharides