[EN] NOVEL NEISSERIA MENINGITIDIS SEROGROUP Y OLIGOMER AND PROCESS FOR SYNTHESIZING THEREOF [FR] NOUVEL OLIGOMÈRE DE NEISSERIA MENINGITIDIS DE SÉROGROUPE Y ET PROCÉDÉ DE SYNTHÈSE DE CELUI-CI
silyl, isopropylidene and 4-methoxybenzyl protective groups have been attached to the amino acid 5-hydroxy-L-norvaline. The resulting glycosylated building blocks were used in Fmoc solid-phase synthesis of glycopeptides related to a fragment from type II collagen which is immunodominant in a mouse model for rheumatoid arthritis. The protective groupsused for the carbohydrate moieties were completely removed
An Efficient Modular One-Pot Synthesis of Heparin-Based Anticoagulant Idraparinux
作者:Supriya Dey、Hong-Jay Lo、Chi-Huey Wong
DOI:10.1021/jacs.9b03266
日期:2019.7.3
O-sulfated α-methyl glycoside of heparin pentasaccharide motif known to interact with the antithrombin III domain and act as anticoagulant. The current most effective synthesis of Idraparinux is complicated and nonstereoselective, requiring numerous stepwise procedures with low yields. We report here an efficient modular one-pot synthesis of Idraparinux involving the use of a glycosyl phosphate with 6-
Epimeric and amino disaccharide analogs as probes of an α-(1→6)-mannosyltransferase involved in mycobacterial lipoarabinomannanbiosynthesis
作者:Pui Hang Tam、Todd L. Lowary
DOI:10.1039/b916580k
日期:——
Mycobacterial lipoarabinomannan (LAM) is an important, immunologically active glycan found in the cell wall of mycobacteria, including the human pathogen Mycobacterium tuberculosis. At the core of LAM is a mannan domain comprised of α-(1→6)-linked-mannopyranose (Manp) residues. Previously, we and others have demonstrated that α-Manp-(1→6)-α-Manp disaccharides (e.g., Manp-(1→6)-α-ManpOctyl, 1) are the
Concise synthesis of two trisaccharides related to the saponin isolated from Centratherum anthelminticum
作者:Santanu Mandal、Balaram Mukhopadhyay
DOI:10.1016/j.tet.2007.08.077
日期:2007.11
Chemical synthesis of two trisaccharidesrelated to the saponinisolatedfrom Centratherum anthelminticum is reported. Stereoselective, high-yielding glycosylation strategies were developed using H2SO4 immobilized on silica for activation of trichloroacetimidate donors, or in conjunction with N-iodosuccinimide for activation of a thioglycoside. A late stage TEMPO-mediated oxidation was performed for
报道了从炭疽病菌中分离出的与皂苷有关的两种三糖的化学合成。使用固定在二氧化硅上的H 2 SO 4活化三氯乙酰亚氨酸酯供体,或与N-碘琥珀酰亚胺联用来活化硫糖苷,开发了立体选择性,高产糖基化策略。进行后期TEMPO介导的氧化,以形成所需的糖醛酸部分。
pH Dependent Thermal Stabilization of DNA by Glcβ(1→3)GlcNAcβ1→STol
A disaccharide, Glc)(1→3)GlcNAcβ1→STol (GGS, 1), was synthesized and demonstrated to stabilize ct-DNA during the denaturing process. GGS at 50 μM shifted T m of ct-DNA by 23 °C and the behavior was pHdependent. Poly(dA-dT) 2 was found to be the preferable type of DNA for GGS stabilization by circular dichroism spectroscopy study.
合成了一种二糖 Glc)(1→3)GlcNAcβ1→STol (GGS, 1),并证明它可以在变性过程中稳定 ct-DNA。50 μM 的 GGS 将 ct-DNA 的 T m 移动了 23 °C,其行为取决于 pH。通过圆二色光谱研究发现 Poly(dA-dT) 2 是用于稳定 GGS 的优选 DNA 类型。