Stereoselective synthesis of [3.3.0] fused lactones (γ-butyrolactones) of sugars and nucleosides by free radical intramolecular cyclization
Abstract
Enantiomerically pure [3.3.0] fused lactones of ribofuranosyl sugars and nucleosides at positions 2,3 of the ribofuranose ring have been prepared by intramolecular addition of radicals onto the α-position of α,β-unsaturated esters.