THE SYNTHESIS OF GLYCOSYL FLUORIDES USING PYRIDINIUM POLY(HYDROGEN FLUORIDE)
作者:Walter A. Szarek、Grzegorz Grynkiewicz、Bogdan Doboszewski、George W. Hay
DOI:10.1246/cl.1984.1751
日期:1984.10.5
Partially protected monosaccharides, having the anomeric hydroxyl group underivatized, react with poly(hydrogenfluoride) to yield the corresponding glycosyl fluorides.
部分保护的单糖,异头羟基未衍生,与聚(氟化氢)反应生成相应的糖基氟化物。
Reaction of 1,2-Orthoesters with HF−Pyridine: A Method for the Preparation of Partly Unprotected Glycosyl Fluorides and Their Use in Saccharide Synthesis
作者:J. Cristóbal López、Juan Ventura、Clara Uriel、Ana M. Gómez、Bert Fraser-Reid
DOI:10.1021/ol901630d
日期:2009.9.17
Glycosyl fluorides can be prepared In an efficient manner by treatment of pyranose- or furanose-derived 1,2-orthoesters, with hydrogen fluoride pyridine (HF-py). The method is compatible with the presence of a variety of protecting groups, including tert-butyldiphenyl silyl ethers, and can be applied to sugar derivatives with free hydroxyl groups, thus avoiding the need for the protection-deprotection steps.
Glycosyl fluorides from <i>n</i>-pentenyl-related glycosyl donors — Application to glycosylation strategies
作者:Bert Fraser-Reid、J. Cristobal Lopez、Paloma Bernal-Albert、Ana M. Gomez、Clara Uriel、Juan Ventura
DOI:10.1139/cjc-2012-0285
日期:2013.1
fluorides by a variety of methods. In the case of NPGs, Barluenga’s reagent, bis(pyridinium)iodonium(I)tetrafluoroborate (IPy2BF4), gives good yields of glycosyl fluorides when HF–pyridine complex is used as an additional fluoride source. NPOEs can be activated either by a combination of electrophilic iodonium (Barluenga’s reagent) and HBF4 or by the action of HF–pyridine complex. The ensuing glycosyl