Abstract FeCl3/C was used as an efficient and convenient promoter for glycosylation through Ferrier-type rearrangement of 3,4,6-tri-O-benzyl-D-glucal, which is a relatively unreactivesubstrate for this type of reaction. The method was applicable to a wide range of alcohols, especially phenols. A series of 2,3-unsaturated-O-glucosides were prepared efficiently (47–92%) by this method under mild conditions
Aluminium triflate catalysed O-glycosidation: temperature-switched selective Ferrier rearrangement or direct addition with alcohols
作者:D. Bradley G. Williams、Sandile B. Simelane、Henok H. Kinfe
DOI:10.1039/c2ob25540e
日期:——
A temperature-controlled mechanism switch between the Al(OTf)3-catalysed direct addition of alcohols or the Ferrier rearrangement reactions in some glycals is presented. The scope and limitations are investigated as are the influence of the stereochemistry and nature of the protecting groups on the glycal substrate.
NaHSO4 supported on silica gel: an alternative catalyst for Ferrier rearrangement of glycals
作者:Henok H. Kinfe、Fanuel M. Mebrahtu、Khuphukile Sithole
DOI:10.1016/j.carres.2011.08.023
日期:2011.11
NaHSO(4) supported on silicagel catalyses the Ferrier rearrangement reaction of 3,4,6-tri-O-acetyl-D-glucal with alcohols and thiols to give the corresponding 2,3-unsaturated glycosides in high anomeric selectivity and good to excellent yield in short reaction time.