Design, synthesis, and anti-HIV activity of 4′-modified carbocyclic nucleoside phosphonate reverse transcriptase inhibitors

Bioorganic & Medicinal Chemistry
2009.0

Abstract

A diphosphate of a novel cyclopentyl based nucleoside phosphonate with potent inhibition of HIV reverse transcriptase (RT) (20, IC(50)=0.13 microM) has been discovered. In cell culture the parent phosphonate diacid 9 demonstrated antiviral activity EC(50)=16 microM, within two-fold of GS-9148, a prodrug of which is currently under clinical investigation, and within 5-fold of tenofovir (PMPA). In vitro cellular metabolism studies using 9 confirmed that the active diphosphate metabolite is produced albeit at a lower efficiency relative to GS-9148.

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