A Facile Method for Oxidation of Primary Alcohols to Carboxylic Acids and Its Application in Glycosaminoglycan Syntheses
作者:Lijun Huang、Nardos Teumelsan、Xuefei Huang
DOI:10.1002/chem.200600290
日期:2006.7.5
two-step, one-pot procedure was developed for the conversion of primary alcohols to carboxylic acids. The alcohol was first treated with NaOCl and TEMPO under phase-transfer conditions, followed by NaClO2 oxidation in one pot. This reaction is applicable to a wide range of alcohols and the mild reaction conditions are compatible with many sensitive functional groups, including electron-rich aromatic rings
开发了一种方便的两步一锅法将伯醇转化为羧酸。首先在相转移条件下用 NaOCl 和 TEMPO 处理醇,然后在一锅中用 NaClO2 氧化。该反应适用于广泛的醇类,温和的反应条件与许多敏感的官能团相容,包括富电子芳环、酸不稳定的异丙叉缩酮和糖苷键,以及易氧化的硫缩醛、对甲氧基苄基和烯丙基部分。通过使用这种新的氧化方案,已经以高产率合成了几种糖胺聚糖,例如肝素、软骨素和透明质酸寡糖。
Carbon tetrachloride-free allylic halogenation-mediated glycosylations of allyl glycosides
作者:Anupama Das、Narayanaswamy Jayaraman
DOI:10.1039/d1ob01298c
日期:——
CCl4 as a solvent. The activated mixed halo-allyl glycosides led to glycosylations, mediated by a triflate, in a latent-active manner, with the allyl glycosides acting as donors and acceptors. Systematic glycosylation studies are performed with different triflate promoters, non-glycosyl acceptors and various allyl glycosyl donors. One-pot allylic halogenations and subsequent glycosylations are developed
Radical halogenation-mediated latent–active glycosylations of allyl glycosides
作者:Rita Pal、Anupama Das、Narayanaswamy Jayaraman
DOI:10.1039/c7cc07332a
日期:——
Radical halogenation-mediated glycosylation using allyl glycosides as donors and as acceptors emerges to be an efficient and hither-to unknown glycosylationmethod, adhering to the concept of the latent–active methodology. Several di- and trisaccharides that possess the allyl moiety at their reducing end are prepared through this newglycosylation methodology.
A FACILE SYNTHESIS OF MANNOSE TRI- AND TETRASACCHARIDE REPEATING UNITS OF FUNGAL CELL-WALL POLYSACCHARIDE FROM<i>MICROSPORUM</i>AND<i>TRYCHOPHYTON</i>SPECIES
作者:Yuliang Zhu、Fanzuo Kong
DOI:10.1081/scc-120003613
日期:2002.1
ABSTRACT A facilesynthesis of the trisaccharide α-D-mannopyranosyl-(1→2)-α-D-mannopyranosyl-(1→6)-α-D-mannopyranose and the tetrasaccharide α-D-mannopyranosyl-(1→2)-α-D-mannopyranosyl-(1→6)-α-D-mannopyranosyl-(1→6)-D-mannopyranose, the repeating units of fungal cell-wall polysaccharide from Microsporum gypseum and Trychophyton, was achieved using α-(1→2)-linked disaccharide imidate as the donor. The
Provided herein are conjugates comprising a protein and an oligosaccharide of one of Formulae I-VI. Also provided herein are pharmaceutical compositions comprising such conjugates. Further provided herein are methods of treating a lysosomal storage disorder in a mammal by administration of an oligosaccharide-glycoprotein conjugate.