Intramolecular glycosylation as a regio- and stereocontrolled approach for the synthesis of 8-oxo-purine nucleosides

Intramolecular glycosylation of purine derivatives that are temporarily connected to the 5 position of ribofuranosyl donors at their 8 position through an ethereal linkage leads to 8-oxo-purine β-nucleosides in a stereoselective manner.