Synthesis of 5′-Methylene-Phosphonate Furanonucleoside Prodrugs: Application to D-2′-Deoxy-2′-α-fluoro-2′-β-C-methyl Nucleosides
2012
Pradere, Ugo | Amblard, Franck | Coats, Steven J. | Schinazi, Raymond F.
A new and facile synthetic pathway to metabolically stable 5′-methylene-bis(pivaloyloxymethyl)(POM)phosphonate furanonucleoside prodrugs is reported. The key step involves a Horner–Wadsworth–Emmons reaction of a tetra(pivaloyloxymethyl) bisphosphonate salt with appropriately protected 5′-aldehydic nucleosides. This efficient approach was applied for the synthesis HCV related 2′-deoxy-2′-α-fluoro-2′-β-C-methyl nucleosides.
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