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Potent and selective HIV-1 ribonuclease H inhibitors based on a 1-hydroxy-1,8-naphthyridin-2(1H)-one scaffold
Peter D Williams1, Donnette D Staas, Shankar Venkatraman
1Department of Medicinal Chemistry, Merck and Co., Inc., West Point, PA 19486, USA. peter_williams@merck.com
Abstract:
Optimization studies using an HIV RNase H active site inhibitor containing a 1-hydroxy-1,8-naphthyridin-2(1H)-one core identified 4-position substituents that provided several potent and selective inhibitors. The best compound was potent and selective in biochemical assays (IC(50)=0.045 μM, HIV RT RNase H; 13 μM, HIV RT-polymerase; 24 μM, HIV integrase) and showed antiviral efficacy in a single-cycle viral replication assay in P4-2 cells (IC(50)=0.19 μM) with a modest window with respect to cytotoxicity (CC(50)=3.3 μM).
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