68567-54-4Relevant academic research and scientific papers
Synthetic trisaccharides reveal discrimination of: Endo -glycosidic linkages by exo -acting α-1,2-mannosidases in the endoplasmic reticulum
Nitta, Kyohei,Kuribara, Taiki,Totani, Kiichiro
supporting information, p. 4137 - 4145 (2021/05/19)
A tri-antennary Man9GlcNAc2 glycan on the surface of endoplasmic reticulum (ER) glycoproteins functions as a glycoprotein secretion or degradation signal after regioselective cleavage of the terminal α-1,2-mannose residue of each branch. Four α-1,2-mannos
Regio- and Stereoselective Synthesis of 1,2- cis-Glycosides by Anomeric O-Alkylation with Organoboron Catalysis
Izumi, Sanae,Kobayashi, Yusuke,Takemoto, Yoshiji
supporting information, p. 665 - 670 (2019/01/21)
Regio- and stereoselective synthesis of 1,2-cis-glycosides has been achieved by catalytic anomeric O-alkylation using organoboron compounds. Modulating steric and electronic factors of both catalysts and substrates enables activation of the axially oriented anomeric oxygens of glucose-derived dialkoxyborates. The mild reaction conditions allow broad functional-group tolerance. This approach can be applied to the efficient sequential synthesis of oligosaccharides.
Synthesis and binding affinity analysis of α1-2- and α1-6-O/S-linked dimannosides for the elucidation of sulfur in glycosidic bonds using quartz crystal microbalance sensors
Norberg, Oscar,Wu, Bin,Thota, Niranjan,Ge, Jian-Tao,Fauquet, Germain,Saur, Ann-Kathrin,Aastrup, Teodor,Dong, Hai,Yan, Mingdi,Ramstr?m, Olof
, p. 35 - 42 (2017/10/25)
The role of sulfur in glycosidic bonds has been evaluated using quartz crystal microbalance methodology. Synthetic routes towards α1-2- and α1-6-linked dimannosides with S- or O-glycosidic bonds have been developed, and the recognition properties assessed in competition binding assays with the cognate lectin concanavalin A. Mannose-presenting QCM sensors were produced using photoinitiated, nitrene-mediated immobilization methods, and the subsequent binding study was performed in an automated flow-through instrumentation, and correlated with data from isothermal titration calorimetry. The recorded Kd-values corresponded well with reported binding affinities for the O-linked dimannosides with affinities for the α1-2-linked dimannosides in the lower micromolar range. The S-linked analogs showed slightly disparate effects, where the α1-6-linked analog showed weaker affinity than the O-linked dimannoside, as well as positive apparent cooperativity, whereas the α1-2-analog displayed very similar binding compared to the O-linked structure.
Application of the 2-nitrobenzyl group in glycosylation reactions: A valuable example of an arming participating group
Buda, Szymon,Golebiowska, Patrycja,Mlynarski, Jacek
supporting information, p. 3988 - 3991 (2013/07/19)
The application of the o-nitrobenzyl (oNBn) group is demonstrated. This practical methodology allows the stereocontrolled synthesis of glucosides with a 1,2-trans linkage. This new ether-type arming group can broadly extend the concept of the use of participating groups in glycosylation reactions. Easy protection and deprotection of the oNBn group further confirms its usefulness in synthesis. The application of o-nitrobenzyl (oNBn) ether as an arming participating group is demonstrated. This practical methodology allows the stereocontrolled synthesis of glucosides with a 1,2-trans linkage. Copyright
Disaccharide-containing macrocycles by click chemistry and intramolecular glycosylation
Tiwari, Vinod K.,Kumar, Amit,Schmidt, Richard R.
, p. 2945 - 2956 (2012/07/27)
In this study o- and m-xylylene moieties in combination with a triazolylmethyl moiety have been successfully employed as a relatively rigid spacer system in intramolecular glycosylation reactions. Phenyl 3,4,6-tri-O-benzyl-2-O-propargyl-1-thio-D-glucopyra
Synthetic oligosaccharides as tools to demonstrate cross-reactivity between polysaccharide antigens
Pozsgay, Vince,Kubler-Kielb, Joanna,Coxon, Bruce,Santacroce, Paul,Robbins, John B.,Schneerson, Rachel
experimental part, p. 5922 - 5941 (2012/10/07)
Escherichia coli O148 is a nonencapsulated enterotoxigenic (ETEC) Gram negative bacterium that can cause diarrhea, hemorrhagic colitis, and hemolytic uremic syndrome in humans. The surface-exposed O-specific polysaccharide (O-SP) of the lipopolysaccharide
Biotin sulfone tagged oligomannosides as immunogens for eliciting antibodies against specific mannan epitopes
Despras, Guillaume,Robert, Raymond,Sendid, Boualem,MacHez, Emeline,Poulain, Daniel,Mallet, Jean-Maurice
experimental part, p. 1817 - 1831 (2012/05/20)
Biotinylated tri and tetrasaccharide: α Man (1→3) α Man (1→2) α Man; α Man (1→3) α Man (1→2) α Man (1→2) α Man were prepared using methyl tertbutyl phenyl thioglycosides glycosyl donors (MBP) and biotin sulfone strategy. Three key mannosyl thioglycosidic
Armed-disarmed effect on the stability of cysteine thioglucosides
Nokwequ, Mbulelo G.,Nkambule, Comfort M.,Gammon, David W.
, p. 18 - 23 (2013/01/14)
Thioglucosides of cysteine show variable stability depending on the nature of the protecting groups on the glycosyl donor. Armed protecting groups (benzyl) lead to products that decompose readily while disarmed protecting groups (acetyl) lead to more stable products. Since this armed/disarmed effect of the protecting group on the stability of the thioglucosides is more pronounced for cysteine with an unprotected carboxylic group, the proposed mechanism is that decomposition is initiated by an intramolecular protonation of glycosyl sulfide and subsequent displacement of the sulfide by adventitious nucleophiles.
Synthesis of truncated analogues for studying the process of glycosyl phosphatidylinositol modification
John, Franklin,Hendrickson, Tamara L.
supporting information; experimental part, p. 2080 - 2083 (2010/07/03)
Figure presented Many eukaryotic proteins are modified with a glycosylphosphatidylinositol (GPI) anchor at their C-termini. This post-translational modification causes these proteins to be noncovalently tethered to the plasma membrane. The synthesis of tr
Concise total syntheses of aspalathin and nothofagin
Yepremyan, Akop,Salehani, Baback,Minehan, Thomas G.
supporting information; experimental part, p. 1580 - 1583 (2010/06/17)
Chemical Fig. Reprentation Syntheses of the C-glycosyl flavone natural products aspalathin and nothofagin have been accomplished in eight steps from tribenzyl glucal, tribenzylphloroglucinol, and either 4-(benzyloxy) phenylacetylene or 3,4-bis(benzyloxy)phenylacetylene. The key step of the syntheses involves a highly stereoselective Lewis acid promoted coupling of 1,2-di-o-acyl-3,4,6-tribenzylglucose with tribenzylphloroglucinol, which gives rise to the corresponding β-C-aryl glycoside in 30-65% yields.
