R. Fernandez et S. Castillon, Synthesis of 2 ',3 '-dideoxy-3 ',3 '-difluoro and 2 ',3 '-dideoxy-2 ',2 '-difluoropyranosyl nucleosides analogues of gemcitabine, TETRAHEDRON, 55(28), 1999, pp. 8497-8508
The gem-difluoronucleosides 1 and 2, pyranosyl analogues of gemcitabine, ha
ve been synthesized from D-mannose and D-glucose respectively. The key step
s were the formation of the difluoromethylene group by reaction of the corr
esponding ulose with DAST, and the glycosylation. (C) 1999 Elsevier Science
Ltd. All rights reserved.