R. Pontikis et al., A NEW ROUTE TO 2'-C-METHYLENE NUCLEOSIDE ANALOGS, INHIBITORS OF RIBONUCLEOTIDE REDUCTASE, Tetrahedron letters, 36(20), 1995, pp. 3523-3526
Glycosyl phenyl sulfone obtained in 4 steps from isosaccharino-lactone
was convened into a 2'-C-acetoxymethylfuranoid glycal with SmI2-HMPA.
Coupling of this glycal with silylated thymine or cytidine in the pre
sence of Pd(0) led after deprotection, to the 2'-deoxy-2'-methylidene-
5-methyluridine and to tire 2'-deoxy-2'-methylidene cytosine, respecti
vely.