of the pyrophosphate moiety of 2′-deoxynucleoside triphosphates by non natural δ-dicarboxylic butyl amino acid allows incorporation of natural 2′-deoxycytidine into DNA using HIV-1reversetranscriptase (RT) as enzyme. In contrast, the 3′-deoxycytidine analogue was not a substrate of the HIV-1 RT.
bis-negatively charged phosphoramidate side chains. Their inhibitory effect on HCV NS5Bpolymerase was evaluated in vitro and in HCV subgenomicreplicon containing Huh-6 cells. As expected, 3′-H compounds are more potent than their 3′-OH counterparts to inhibit HCV polymeraseactivity. The most potent inhibitor, a 5′-phosphorylated dinucleotide bearing a bis-negatively charged amino side chain (7), exhibits an