Glycal Assembly by the in Situ Generation of Glycosyl Dithiocarbamates
作者:Panuwat Padungros、Laura Alberch、Alexander Wei
DOI:10.1021/ol301349w
日期:2012.7.6
Glycalassembly offers an expedient entry into β-linked oligosaccharides, but epoxyglycal donors can be capricious in their reactivities. Treatment with Et2NH and CS2 enables their in situ conversion into glycosyl dithiocarbamates, which can be activated by copper triflate for coupling with complex or sterically congested acceptors. The coupling efficiency can be further enhanced by in situ benzoylation