Intramolecular cyclization-trapping of carbon radicals by olefins as means to functionalize 2′- and 3′-carbons in β-D-nucleosides

Article abstract of DOI:10.1016/S0040-4020(01)96134-4

Intramolecular free-radical addition-cyclization reactions of 1-(5′-O-(MMTr)-3′-deoxy-3′-phenylseleno-2′-O-allyl- or 2′-O-alkynyl-β-D-arabinofuranosyl)uracils 6a - 6d, 1-(5′O-(MMTr)-2′-deoxy-2′-phenylseleno-3′-O-allyl- or 3′-O-alkynyl-β-D-xylofuranosyl)ur