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  • Title: Cardiotonic agents. 5. 1,2-Dihydro-5-[4-(1H-imidazol-1-yl)phenyl]-6-methyl-2-oxo-3- pyridinecarbonitriles and related compounds. Synthesis and inotropic activity.
    Author: Sircar I, Duell BL, Bristol JA, Weishaar RE, Evans DB.
    Journal: J Med Chem; 1987 Jun; 30(6):1023-9. PubMed ID: 3585900.
    Abstract:
    Several 1,2-dihydro-5-(substituted phenyl)-2(1H)-pyridinones were synthesized and evaluated for inotropic activity. 1,2-Dihydro-5-[4-(1H-imidazol-1-yl)phenyl]-6-methyl-2-oxo-3- pyridinecarbonitrile (5a) and the corresponding unsubstituted analogue 14a were the most potent positive inotropic agents in this series. Although the 4,6-dimethyl analogue 6a retained most of the activity of 5a, the 4-methyl analogue 8a was substantially less potent. The synthesis and structure-activity relationships are discussed.
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