219518-19-1Relevant articles and documents
Key disaccharide repeat unit of glucuronic mannan oligosaccharide and preparation method of key disaccharide repeat unit
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Paragraph 0035-0039, (2021/01/28)
The invention provides a skeleton structure of a key disaccharide repeat unit of glucuronic mannan oligosaccharide and a preparation method of the skeleton structure. According to the key disacchariderepeat unit, glucose and mannose are used as raw materials, the key disaccharide repeat unit of glucuronic mannan oligosaccharide for treating or/and preventing Parkinson's disease and nephropathy isprepared through simple and easy-to-implement synthesis steps, and leaving groups of the key disaccharide repeat unit can be used as a glycosyl donor after being modified. The glucuronic acid can beused as a glycosyl receptor after four-position hydroxyl protecting groups of the glucuronic acid are removed, can be conveniently used for extending a carbohydrate chain of glucuronic mannan oligosaccharide, and has a key application value in the field of synthesis of the glucuronic mannan oligosaccharide.
A Synthetic Carbohydrate-Protein Conjugate Vaccine Candidate against Klebsiella pneumoniae Serotype K2
Ravinder, Mettu,Liao, Kuo-Shiang,Cheng, Yang-Yu,Pawar, Sujeet,Lin, Tzu-Lung,Wang, Jin-Town,Wu, Chung-Yi
, p. 15964 - 15997 (2020/11/13)
Klebsiella pneumoniae causes pneumonia and liver abscesses in humans worldwide and contains virulence factor capsular polysaccharides and lipopolysaccharides linked to the cell wall. Although capsular polysaccharides are good antigens for vaccine producti
Stereoselective Phenylselenoglycosylation of Glycals Bearing a Fused Carbonate Moiety toward the Synthesis of 2-Deoxy-β-galactosides and β-Mannosides
Li, Zhongjun,Meng, Shuai,Yao, Wang,Zhong, Wenhe
supporting information, (2020/04/09)
A phenylselenoglycosylation reaction of glycal derivatives mediated by diphenyl diselenide and phenyliodine(III) bis(trifluoroacetate) under mild conditions is described. Stereoselective glycosylation has been achieved by installing fused carbonate on those glycals. 3,4-O-Carbonate galactals and 2,3-O-carbonate 2-hydroxyglucals are converted into corresponding glycosides in good yields with excellent β-selectivity, resulting in 2-phenylseleno-2-deoxy-β-galactosides and 2-phenylseleno-β-mannosides which are good precursors of 2-deoxy-β-galactosides and β-mannosides, respectively.
HEPARANASE COMPOUNDS AND METHODS OF USE
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Page/Page column 40, (2020/11/03)
The invention relates to compounds that interact with heparanase, uses in heparanase screening, uses in in vitro and in vivo imaging (e.g., positron emission tomography (PET) and magnetic resonance imaging (MRI)), methods of synthesis, methods of modulati
Phosphotungstic acid as a novel acidic catalyst for carbohydrate protection and glycosylation
Chen, Jyun-Siao,Sankar, Arumugam,Lin, Yi-Jyun,Huang, Po-Hsun,Liao, Chih-Hsiang,Wu, Shen-Shen,Wu, Hsin-Ru,Luo, Shun-Yuan
, p. 33853 - 33862 (2019/11/11)
This work demonstrates the utilization of phosphotungstic acid (PTA) as a novel acidic catalyst for carbohydrate reactions, such as per-O-acetylation, regioselective O-4,6 benzylidene acetal formation, regioselective O-4 ring-opening, and glycosylation. These reactions are basic and salient during the synthesis of carbohydrate-based bioactive oligomers. Phosphotungstic acid's high acidity and eco-friendly character make it a tempting alternative to corrosive homogeneous acids. The various homogenous acid catalysts were replaced by the phosphotungstic acid solely for different carbohydrate reactions. It can be widely used as a catalyst for organic reactions as it is thermally stable and easy to handle. In our work, the reactions are operated smoothly under ambient conditions; the temperature varies from 0 °C to room temperature. Good to excellent yields were obtained in all four kinds of reactions.
Synthesis of trisaccharide repeating unit of fucosylated chondroitin sulfate
He, Haiqing,Chen, Dong,Li, Xiaomei,Li, Chengji,Zhao, Jin-Hua,Qin, Hong-Bo
supporting information, p. 2877 - 2882 (2019/03/21)
We described the chemical synthesis of a sulfated trisaccharide repeating unit of fucosylated chondroitin sulfate (FCS), which has significant anticoagulant activity. Well-functionalized monosaccharides were readily prepared, and highly efficient glycosyl
Immobilization of UDP-Galactose on an Amphiphilic Resin
Bevan, Jessica G. M.,Louren?o, Eva C.,Chaves-Ferreira, Miguel,Rodrigues, Jo?o A.,Rita Ventura
supporting information, p. 908 - 914 (2018/02/27)
Nucleotide sugars are activated sugar precursors used by glycosyltransferases to form glycans. Here we report the first examples of resin-bound nucleotide sugars: fluorinated UDP-galactose and UDP-galactose. They were conjugated to a polyethylene glycol resin through the C6 position with an SMCC linker in good to excellent yields. This synthesis represents an efficient method to access resin-bound nucleotide sugars in a modular approach that enables modifications of the sugar or nucleotide before conjugation. The system has been conceived as a new chemistry-based screening system for enzymes that use UDP-galactose.
Simple and Practical Real-Time Analysis of Solid-Phase Reactions by Thin-Layer Chromatography
Wu, Chia-Hui,Chen, Chun C.,Lin, Su-Ching,Wang, Cheng-Chung
, p. 1430 - 1436 (2018/05/15)
Solid-phase synthesis is a practical approach for simplifying the time-consuming and routine purification steps in the preparation of numerous naturally occurring molecules; however, studying such reactions is difficult due to the lack of a convenient monitoring method. By using thin-layer chromatography in conjunction with a photolabile linker on a resin, we developed a convenient and simple method for monitoring solid-phase reactions in real time by thin-layer chromatography. This method provides a user-friendly protocol for examining reaction conditions for solid-state syntheses.
Synergistic Glycosylation as Key to the Chemical Synthesis of an Outer Core Octasaccharide of Helicobacter pylori
Zou, Xiaopeng,Qin, Chunjun,Pereira, Claney L.,Tian, Guangzong,Hu, Jing,Seeberger, Peter H.,Yin, Jian
supporting information, p. 2868 - 2872 (2018/02/06)
Helicobacter pylori, a widespread gastric bacterial pathogen that infects 90 % of the population in developing countries, causes chronic gastritis, peptic ulcers and gastric cancer. Battling H. pylori infection is a serious challenge due to the increased
Oligosaccharide conjugate based on Streptococcus pneumoniae type 3 capsular polysaccharide, preparation method and applications thereof
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Paragraph 0063; 0064; 0065, (2017/10/13)
The present invention relates to an oligosaccharide conjugate based on Streptococcus pneumoniae type 3 capsular polysaccharide, a preparation method and applications thereof, wherein the structure general formula of the oligosaccharide conjugate is define