N-Iodosuccinimide-mediated intramolecular aglycon delivery

Enol ethers may be accessed via Tebbe methylenation of either 2-O acetates or para-methoxybenzoates. N-Iodosuccinimide may then be employed to achieve both tethering and thioglycoside activation allowing the stereoselective synthesis of α-glucosides and β-mannosides, either in a one or two step procedure.