IMPROVED GLYCOSYLATION METHOD USING SULFOXIDE DONORS
申请人:Princeton University
公开号:EP1097163A1
公开(公告)日:2001-05-09
EP1097163A4
申请人:——
公开号:EP1097163A4
公开(公告)日:2002-03-06
US6388059B1
申请人:——
公开号:US6388059B1
公开(公告)日:2002-05-14
[EN] IMPROVED GLYCOSYLATION METHOD USING SULFOXIDE DONORS<br/>[FR] PROCEDE DE GLYCOSYLATION AMELIORE, METTANT EN OEUVRE DES DONNEURS SULFOXYDE
申请人:UNIV PRINCETON
公开号:WO2000004035A1
公开(公告)日:2000-01-27
A method for forming a glycosidic linkage by: (a) contacting a glycoside bearing an anomeric sulfoxide group with a compound bearing a free hydroxyl group in the presence of an organic acid anhydride and a scavenger of sulfenyl esters; and (b) allowing a glycosylation reaction to proceed under conditions effective to produce the glycosidic linkage. In a preferred embodiment of the invention, the glycoside bearing an anomeric sulfoxide group is added to a mixture of the other reactants. In another preferred embodiment of the invention, a Lewis acid is also present in the reaction mixture. This invention is further directed to a method for forming a glycosidic linkage by: (a) forming a solution comprising: a compound bearing a free hydroxyl group, and an organic acid anhydride; (b) adding to the solution a glycoside bearing an anomeric sulfoxide group; and (c) allowing a glycosylation reaction to proceed under conditions effective to produce the glycosidic linkage. In a preferred embodiment of the invention, a Lewis acid is present in the solution.
Sulfenate Intermediates in the Sulfoxide Glycosylation Reaction
作者:Jeff Gildersleeve、Robert A. Pascal、Daniel Kahne
DOI:10.1021/ja980827h
日期:1998.6.1
The sulfoxideglycosylationreaction works remarkably well for many difficult glycosylations. We attribute this in part to the fact that an extremely reactive intermediate can be generated rapidly under mild conditions at low temperature. We find that anomeric sulfenates can be formed in the reaction and that these intermediates impede glycosylation at low temperature. A mechanism for sulfenate formation