α-Glucosaminide synthesis: exercising stereocontrol at C1 or C2 via torsional effects or DeShong nucleophiles
作者:G Anilkumar、Latha G Nair、Lars Olsson、Jacquitta K Daniels、Bert Fraser-Reid
DOI:10.1016/s0040-4039(00)01329-0
日期:2000.9
The synthesis of α-glucosaminides may be carried out by installing synthons for the cis-related C1 and C2 functionalities in either order. When the C2 azide is installed first, α-glycosidation can be induced by using a 4,6-O-benzylidene ring to provide torsional control of anomeric selectivity. In the alternative option, the C1 linkage can be established by use of an n-pentenyl-manno-1,2-orthoester