Gd(OTf) 3 catalyzed preparation of 2,3-unsaturated O -, S -, N -, and C -pyranosides from glycals by Ferrier Rearrangement
作者:Peiran Chen、Jie Su
DOI:10.1016/j.tet.2015.11.002
日期:2016.1
By using Gd(OTf)3 as the catalyst, synthesis of 2,3-unsaturated-glycosides has been performed by Ferrier Rearrangement. A series of 2,3-unsaturated O-, S-, N-, and C-glycosides were obtained from 3,4,6-tri-O-acetyl-d-glucal, 3,4,6-tri-O-benzyl-d-glucal, and 3,4-di-O-acetyl-l-rhamnal under mild reaction conditions in good yields and high anomeric selectivities.
通过使用Gd(OTf)3作为催化剂,已经通过Ferrier重排进行了2,3-不饱和糖苷的合成。一系列的2,3-不饱和ø - ,小号- ,Ñ - ,和Ç从3,4,6-三获得-glycosides ö乙酰基d -glucal,3,4,6-三- ø -苄基- d -glucal,和3,4-二- ö乙酰基升以良好的收率和高的选择性异头温和反应条件下-rhamnal。