Selective Oxidation of Glycosyl Sulfides to Sulfoxides with Sodium Hypochlorite and Catalyzed by Metalloporphyrins
作者:Jian-Ying Huang、Shi-Jun Li、Yan-Guang Wang
DOI:10.1080/07328303.2010.483041
日期:2010.4
An efficient and selective method for oxidation of glycosyl sulfides to the corresponding glycosyl sulfoxides with metalloporphyrins as catalysts and sodium hypochlorite as oxidant was achieved under mild conditions. High chemoselectivity and diastereomeric excesses were obtained. Both acid-labile protected groups and carbon-carbon double bonds of allyl groups tolerated under these conditions.
Synthesis of the Glc3Man N-glycan tetrasaccharide by iterative allyl IAD
作者:Emanuele Attolino、Ian Cumpstey、Antony J. Fairbanks
DOI:10.1016/j.carres.2006.02.022
日期:2006.7
The synthesis of the tetrasaccharide alpha-D-Glcp-(1 -> 2)-alpha-D-Glcp-(1 -> 3)-alpha-D-Glcp-(1 -> 3)-alpha-D-Manp-OMe, corresponding to the terminal tetrasaccharide portion of the glucose terminated arm of the N-glycan tetradecasaccharide, was achieved with complete stereocontrol by the use of iterative allyl protecting group mediated intramolecular aglycon delivery (allyl IAD) demonstrating the utility of intramolecular glycosylation for the stereocontrolled construction of multiple glycosidic linkages during the synthesis of an oligosaccharide. (c) 2006 Elsevier Ltd. All rights reserved.