(S)-Camphorsulfonic acid catalyzed highly stereoselective synthesis of pseudoglycosides
作者:Bala Kishan Gorityala、Shuting Cai、Jimei Ma、Xue-Wei Liu
DOI:10.1016/j.bmcl.2009.04.003
日期:2009.6
A mild and efficient synthesis of pseudoglycosides has been developed using metal free (S)-camphorsulfonic acid. (S)-CSA acts as an excellent catalyst for conversion of 2,4,6-tri-O-acetyl-D-glucal to 2,3-unsaturated O-glycosides. A wide range of biologically active natural products, alcohols and thiols could be coupled with glucal to give the desired pseudoglycosides in good to excellent yields with exclusive alpha-stereoselectivity. (C) 2009 Elsevier Ltd. All rights reserved.
ZnBr<sub>2</sub>-Catalyzed and Microwave-Assisted Synthesis of 2,3-Unsaturated Glucosides of Hindered Phenols and Alcohols
作者:D. James Bound、B. K. Bettadaiah、P. Srinivas
DOI:10.1080/00397911.2014.909490
日期:2014.9.2
An efficient procedure for the synthesis of 2,3-unsaturated-O-glycosides: TiCl3(OTf) as the catalyst for type I Ferrier rearrangement
作者:Peiran Chen、Lei Lin
DOI:10.1016/j.tet.2013.04.051
日期:2013.6
An efficient type I Ferrier rearrangement reaction system for the synthesis of 2,3-unsaturated-O-glycosides has been established by using TiCl3(OTf) as the catalyst. A series of 2,3-unsaturated-O-glucosides were prepared from 3,4,6-tri-O-acetyl-D-glucal in good yield and high anomeric selectivity. (C) 2013 Elsevier Ltd. All rights reserved.
CF3SO3H–SiO2 as catalyst for Ferrier rearrangement: an efficient procedure for the synthesis of pseudoglycosides
作者:Peiran Chen、Shaoshan Wang
DOI:10.1016/j.tet.2012.11.019
日期:2013.1
An efficient method for the conversion of 2,4,6-tri-O-acetyl-D-glucal to 2,3-unsaturated glycosides by using triflic acid on SiO2 as catalyst has been established. A series of 2,3-unsaturated glucosides were synthesized in good yield and high anomeric selectivity under transition metal-free conditions. (c) 2012 Elsevier Ltd. All rights reserved.