71925-96-7Relevant academic research and scientific papers
Chemical approach for the syntheses of GM4 isomers with sialic acid to non-natural linkage positions on galactose
Kurimoto, Kenta,Yamamura, Hatsuo,Miyagawa, Atsushi
, p. 39 - 50 (2015/01/08)
Cell-surface glycans containing sialic acid are involved in various biological phenomena. However, the syntheses of GM4 derivatives with (2→2) and (2→4) linkages have not been investigated to date. In this study, sialylation of all of the hydroxyl groups on galactose were investigated for the syntheses of GM4 isomers. Regioselective sialylation was achieved via protection of galactosyl acceptors using electron-rich benzyl groups. These synthetic sialylated glycans will prove to be useful tools for studying unidentified carbohydrate-mediated biological roles.
Structural Studies of the O-Acetyl-Containing O-Antigen from a Shigella flexneri Serotype 6 Strain and Synthesis of Oligosaccharide Fragments Thereof
Chassagne, Pierre,Fontana, Carolina,Guerreiro, Catherine,Gauthier, Charles,Phalipon, Armelle,Widmalm, Goeran,Mulard, Laurence A.
, p. 4085 - 4106 (2013/07/26)
Extensive analysis by NMR spectroscopy of the delipidated lipopolysaccharide of Shigella flexneri serotype 6 strain MDC 2924-71 confirmed the most recently reported structure of the O-antigen repeating unit as {→4)-β-D-GalpA-(1→3)-β-D-GalpNAc-(1→2) -α-L-R
Synthetic routes to three novel scaffolds for potential glycosidase inhibitors
Rommel, Michael,Ernst, Alexander,Koert, Ulrich
, p. 4408 - 4430 (2008/09/17)
Efficient syntheses of three novel scaffolds for potential β-glycosidase inhibitors were developed: The first consists of a 2,7-dioxabicyclo[2.2.1]heptane derivative, which was prepared by an intramolecular ketalisation. The second scaffold consists of a
Synthesis of 1-deoxyhept-2-ulosyl-glycono-1,5-lactone utilizing α-selective O-glycosidation of 2,6-anhydro-1-deoxy-d-hept-1-enitols
Namme, Rie,Mitsugi, Takashi,Takahashi, Hideyo,Shiro, Moto,Ikegami, Shiro
, p. 9183 - 9192 (2007/10/03)
A series of 1-deoxy-heptulo-2-pyranosyl-glycono-1,5-lactones were synthesized utilizing completely α-selective O-glycosidation of heptenitols. Anomeric configuration of the products was confirmed by 3JC,H coupling measurement and X-ray crystal structural analysis. The benzyl-protected ketosyl saccharides were partly unstable, and glycosidic linkage was prone to cleave under the usual debenzylation conditions. To prevent this, we surveyed various additives for the Pd-catalyzed hydrogenation reaction and found that basic alumina was the most effective.
Synthesis of novel bicyclic ketals of galacturonic acid as potential glycosidase inhibitors
Rommel, Michael,Ernst, Alexander,Harms, Klaus,Koert, Ulrich
, p. 1067 - 1070 (2007/10/03)
A synthesis of novel bicyclic ketals of galacturonic acid is described. The key cyclisation step was realised under acidic anhydrous conditions in very good yield. X-ray crystal structure analysis determined the correct regio- and stereochemistry. Georg T
Stereochemical Control in Hex-5-enyl Radical Cyclizations: From Carbohydrates to Carbocycles. 3
RajanBabu, T. V.,Fukunaga, Tadamichi,Reddy, G. S.
, p. 1759 - 1769 (2007/10/02)
The hex-5-enyl radical cyclization reaction was applied to prepare highly oxygenated cyclopentanoids from aldopyranose sugars.The Wittig reaction of the sugars readily provides hex-5-en-1-ols which were converted to hex-5-enyl radicals via one of the vari
