title: Cardiotonic agents. 1. Synthesis and structure-activity relationships in a new class of 3-, 4-, and 5-pyridyl-2(1H)-quinolone derivatives.
abstract: A series of 3-, 4-, and 5-pyridyl-2(1H)-quinolone derivatives with H or HO or CH3O substituents in the 8-position were prepared and tested for positive inotropic activity. Several derivatives, especially 29, 9b, and 27 with a pyridyl ring in the 5-position, were ca. 2-10 times more potent on left guinea pig atria than sulmazole (ARL-115) and milrinone used as references. Some structure-activity relationships are discussed.
mesh_terms: D000818:Animals; D016275:Atrial Function; D002316:Cardiotonic Agents / Q000138:chemical synthesis*; D005260:Female; D006168:Guinea Pigs; D006325:Heart Atria / Q000187:drug effects; D066298:In Vitro Techniques; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D011725:Pyridines / Q000138:chemical synthesis* / Q000494:pharmacology; D011804:Quinolines / Q000138:chemical synthesis* / Q000494:pharmacology; D013329:Structure-Activity Relationship
chemical_list: D002316:Cardiotonic Agents; D007202:Indicators and Reagents; D011725:Pyridines; D011804:Quinolines