Unusually Stable Picoloyl-Protected Trimethylsilyl Glycosides for Nonsymmetrical 1,1′-Glycosylation and Synthesis of 1,1′-Disaccharides with Diverse Configurations
作者:Yen-Chu Luke Lu、Bhaswati Ghosh、Kwok-Kong Tony Mong
DOI:10.1002/chem.201700785
日期:2017.5.17
Nonsymmetrical 1,1′-disaccharides and related derivatives constitute structural components in various glycolipids and natural products. Some of these compounds have been shown to exhibit appealing biological properties. We report a direct yet stereoselective 1,1′-glycosylation strategy for the synthesis of nonsymmetrical 1,1′-disaccharides with diverse configurations and sugar components. The strategy
Highly Stereoselective Glycosyl-Chloride-Mediated Synthesis of 2-Deoxyglucosides
作者:Ved Prakash Verma、Cheng-Chung Wang
DOI:10.1002/chem.201203418
日期:2013.1.14
Cl intermediates: The glycosylation of per-O-benzylated 2-deoxy- and 2,6-dideoxythioglycosides, promoted by the combination of para-toluenesulfenyl chloride (p-TolSCl) and silver triflate (AgOTf), furnished the products in high yields and high stereoselectivity. The glycosyl chloride was the intermediate (see scheme).