Reactions of trimethylsilyl fluorosulfonyldifluoroacetate with purine and pyrimidine nucleosides
作者:Magdalena Rapp、Xiaohong Cai、Wei Xu、William R. Dolbier、Stanislaw F. Wnuk
DOI:10.1016/j.jfluchem.2008.12.004
日期:2009.3
4-hydroxyl group of the enolizable uracil ring. Reaction of the difluorocarbene with the adenosine substrates having the unprotected 6-amino group in the purine ring produced the 6-N-difluoromethyl derivative, while reaction with 6-N-benzoyl protected adenosine analogues gave the difluoromethyl ether product derived from the insertion of difluorocarbene into the enol form of the 6-benzamido group. Treatment
Direct <i>C</i>-Glycosylation of Organotrifluoroborates with Glycosyl Fluorides and Its Application to the Total Synthesis of (+)-Varitriol
作者:Jing Zeng、Seenuvasan Vedachalam、Shaohua Xiang、Xue-Wei Liu
DOI:10.1021/ol102473k
日期:2011.1.7
C-glycosides via BF3·Et2O promoted coupling of organotrifluoroborates and glycosyl fluorides is reported. The application of this method was further demonstrated by the concise and efficient totalsynthesis of (+)-varitriol in only seven steps.
Synthesis of glycosyl fluorides from (phenylthio)glycosides using IF5–pyridine–HF
作者:Masataka Kunigami、Shoji Hara
DOI:10.1016/j.carres.2015.08.005
日期:2015.11
IF5-pyridine-HF, an air- and moisture-stable fluorinating reagent, was applied to the synthesis of glycosyl fluorides from (phenylthio) glycosides. Common protecting groups of alcohol and diol can tolerate the reaction conditions performed, and therefore, the present method is applicable to the synthesis of various glycosyl fluorides. (C) 2015 Elsevier Ltd. All rights reserved.