H. Sugimura et Y. Katoh, Synthesis of 2 ',5 '-dideoxy-5 '-substituted pyrimidine nucleosides via intramolecular glycosylation, CHEM LETT, (4), 1999, pp. 361-362
5'-Azido-5'-deoxy and 5'-arylthio-5'-deoxy pyrimidine nucleosides were synt
hesized employing intramolecular glycosylation, in which a reaction interme
diate was treated in situ with an azide salt or thiol.