2,3-Unsaturated Allyl Glycosides as Glycosyl Donors for Selective α-Glycosylation
作者:Brijesh Kumar、Mushtaq A. Aga、Abdul Rouf、Bhahwal A. Shah、Subhash C. Taneja
DOI:10.1021/jo102333x
日期:2011.5.6
presence of NBS and a catalytic amount of a Lewis acid, 2,3-unsaturated allylglycosides [6-(allyloxy)-3,6-dihydro-2-(hydroxymethyl)-2H-pyran-3-ol] have been successfully used as versatile glycosyl donors for the stereoselective α-glycosylation of a variety of alcohols comprising sensitive functions such as acetonide, keto, nitro, and ester in 50−90% yields. The methodology offers an equally facile alternative