Stereoselectivity investigation on glycosylation of oxazolidinone protected 2-amino-2-deoxy-d-glucose donors based on pre-activation protocol

Under BSM/Tf2O pre-activation glycosylation conditions, diverse 2,3-oxazolidinone protected 2-amino-2-deoxy-d-glucose donors afforded different even opposite stereoselectivities arising from the different protecting groups at the 4,6-OH and/or 2-NH positions.