Design and synthesis of HIV-1 protease inhibitors incorporating oxazolidinones as P2/P2' ligands in pseudosymmetric dipeptide isosteres
Department of Biochemistry and Molecular Pharmacology
Medical Subject Headings
Cell Line; Dipeptides; Drug Design; Drug Resistance, Multiple, Viral; HIV Protease; HIV Protease Inhibitors; HIV-1; Humans; Ligands; Models, Molecular; Molecular Structure; Oxazolidinones; Pyrimidinones; Stereoisomerism; Structure-Activity Relationship
A series of novel HIV-1 protease inhibitors based on two pseudosymmetric dipeptide isosteres have been synthesized and evaluated. The inhibitors were designed by incorporating N-phenyloxazolidinone-5-carboxamides into the hydroxyethylene and (hydroxyethyl)hydrazine dipeptide isosteres as P2 and P2' ligands. Compounds with (S)-phenyloxazolidinones attached at a position proximal to the central hydroxyl group showed low nM inhibitory activities against wild-type HIV-1 protease. Selected compounds were further evaluated for their inhibitory activities against a panel of multidrug-resistant protease variants and for their antiviral potencies in MT-4 cells. The crystal structures of lopinavir (LPV) and two new inhibitors containing phenyloxazolidinone-based ligands in complex with wild-type HIV-1 protease have been determined. A comparison of the inhibitor-protease structures with the LPV-protease structure provides valuable insight into the binding mode of the new inhibitors to the protease enzyme. Based on the crystal structures and knowledge of structure-activity relationships, new inhibitors can be designed with enhanced enzyme inhibitory and antiviral potencies.
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Citation: J Med Chem. 2007 Sep 6;50(18):4316-28. Epub 2007 Aug 16. Link to article on publisher's site