The Design, Synthesis, and Antiviral Activity of Monofluoro and Difluoro Analogues of 4′-Azidocytidine against Hepatitis C Virus Replication: The Discovery of 4′-Azido-2′-deoxy-2′-fluorocytidine and 4′-Azido-2′-dideoxy-2′,2′-difluorocytidine
The discovery of 4′-azidocytidine (3) (R1479) ( J. Biol. Chem. 2006, 281, 3793 ; Bioorg. Med. Chem. Lett. 2007, 17, 2570 ) as a potent inhibitor of RNA synthesis by NS5B (EC50 = 1.28 μM), the RNA polymerase encoded by hepatitis C virus (HCV), has led to the synthesis and biological evaluation of sev...
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Veröffentlicht in: | Journal of medicinal chemistry 2009-05, Vol.52 (9), p.2971-2978 |
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Hauptverfasser: | , , , , , , , , , , , , , , , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The discovery of 4′-azidocytidine (3) (R1479) ( J. Biol. Chem. 2006, 281, 3793 ; Bioorg. Med. Chem. Lett. 2007, 17, 2570 ) as a potent inhibitor of RNA synthesis by NS5B (EC50 = 1.28 μM), the RNA polymerase encoded by hepatitis C virus (HCV), has led to the synthesis and biological evaluation of several monofluoro and difluoro derivatives of 4′-azidocytidine. The most potent compounds in this series were 4′-azido-2′-deoxy-2′,2′-difluorocytidine and 4′-azido-2′-deoxy-2′-fluoroarabinocytidine with antiviral EC50 of 66 nM and 24 nM in the HCV replicon system, respectively. The structure−activity relationships within this series were discussed, which led to the discovery of these novel nucleoside analogues with the most potent compound, showing more than a 50-fold increase in antiviral potency as compared to 4′-azidocytidine (3). |
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ISSN: | 0022-2623 1520-4804 |
DOI: | 10.1021/jm801595c |