Glycosyl Dithiocarbamates: β-Selective Couplings without Auxiliary Groups
作者:Panuwat Padungros、Laura Alberch、Alexander Wei
DOI:10.1021/jo500032k
日期:2014.3.21
donors in β-linked oligosaccharide synthesis. We report a mild, one-pot conversion of glycals into β-glycosyl DTCs via DMDO oxidation with subsequent ring opening by DTC salts, which can be generated in situ from secondary amines and CS2. Glycosyl DTCs are readily activated with Cu(I) or Cu(II) triflate at low temperatures and are amenable to reiterative synthesis strategies, as demonstrated by the