GRAPHICAL ABSTRACT
A highly efficient and mild method for the synthesis of glycosyl sulfonamides and glycosyl amides from glycal has been described using Zn(OTf)2 as an economical and environmentally friendly catalyst. Various N-nucleophiles comprising sulfonamides, benzamides, and carbamates were glycosylated with glycals to obtain corresponding 2,3-unsaturated N-glycosides in good yields.