Glycosylation reactions with ‘disarmed’ thioglycoside donors promoted by N-iodosuccinimide and HClO4–silica
作者:Balaram Mukhopadhyay、Beatrice Collet、Robert A. Field
DOI:10.1016/j.tetlet.2005.06.119
日期:2005.8
Glycosylation of 'disarmed' thioglycosides promoted by NIS in the presence of HClO4 immobilized on silica compares very favourably with the accepted NIS-TfOH procedure. (c) 2005 Elsevier Ltd. All rights reserved.
Combinatorial synthesis of trisaccharides via solution-phase one-pot glycosylation
作者:Takashi Takahashi、Masaatsu Adachi、Akihisa Matsuda、Takayuki Doi
DOI:10.1016/s0040-4039(00)00214-8
日期:2000.4
A library of 72 trisaccharides constructed from a combination of glucosides, galactosides, and mannosides via solution-phase one-pot glycosylation was synthesized rapidly using a manual synthesizer. (C) 2000 Elsevier Science Ltd. All rights reserved.
From Solution Phase to “On-Column” Chemistry: Trichloroacetimidate-Based Glycosylation Promoted by Perchloric Acid−Silica
作者:Balaram Mukhopadhyay、Sarah V. Maurer、Nadine Rudolph、Renate M. van Well、David A. Russell、Robert A. Field
DOI:10.1021/jo051390g
日期:2005.10.1
chromatography column with perchloric acid immobilized on silica facilitated “on-column” glycosylation with subsequent “in situ” purification of products. Coupling yields from this approach were comparable to those obtained from the corresponding solution-phase disaccharide couplings. A series of glycosylated amino acids were also synthesized in high yield with use of the on-column approach.
通过固定在二氧化硅上的高氯酸激活酯保护的三氯乙酰亚胺糖基供体,以 60-90% 的产率提供 1,2-反式二糖。将这种方法应用于一锅顺序糖基化导致以非常高的产率(分别为 76%、62% 和 59% 产率)有效合成N-连接聚糖三甘露糖苷和 Le X和 Le A三糖。溶液相反应也转化为固相形式;用固定在硅胶上的高氯酸灌注标准硅胶色谱柱的顶部,促进“柱上”糖基化,随后“原位”” 产品的净化。这种方法的偶联产量与从相应的溶液相二糖偶联中获得的产量相当。还使用柱上方法以高产率合成了一系列糖基化氨基酸。
Thioctic acid amides: convenient tethers for achieving low nonspecific protein binding to carbohydrates presented on gold surfaces
作者:Rositsa Karamanska、Balaram Mukhopadhyay、David A. Russell、Robert A. Field
DOI:10.1039/b503843j
日期:——
The thioctic acid amides of 2′-aminoethyl α-D-mannopyranoside and 2′-aminoethyl α-1,3-D-mannopyranosyl (α-1,6-D-mannopyranosyl)-α-D-mannopyranoside presented on both planar and nanoparticle gold surfaces give higher specific and lower non-specific protein binding than the related 2′-thioethyl glycosides.