title: Synthesis and pharmacological activities of ethyl 5-cyano-1,6-dihydro-6-oxo-2-(2,3,4-pyridyl)-3-pyridinecarboxylates and derivatives.
abstract: The synthesis of ethyl esters of 5-cyano-1,6-dihydro-6-oxo-3-pyridinecarboxylic acids carrying as 2-substituent the 2-,3- or 4-pyridyl group is described. By alkaline hydrolysis followed by acidification, these esters gave the corresponding carboxylic acids, which were decarboxylated to 1,2-dihydro-2-oxo-6-(2,3,4-pyridyl)-3-pyridinecarbonitriles. As milrinone analogues, the above compounds were tested on contractile activity and frequency rate of spontaneously beating atria from reserpine-treated guinea-pigs. Ethyl 5-cyano-1,6-dihydro-6-oxo-2-(2-pyridyl)-3-pyridinecarboxylate showed an appreciable positive inotropic activity, although inferior to that of milrinone; moreover, some other compounds bearing the above 2-substitution pattern showed interesting antiinflammatory, analgesic and hypotensive activity.
authors: Istituto di Scienze Farmaceutiche dell'Università, Genova, Italy.
authors: L
authors: L
authors: Mosti
authors: P
authors: P
authors: Schenone
authors: M M
authors: MM
authors: Mahiques
authors: P
authors: P
authors: Dorigo
authors: D
authors: D
authors: Fraccarollo
authors: G
authors: G
authors: Santostasi
authors: M
authors: M
authors: D'Amico
authors: M
authors: M
authors: Falciani
authors: E
authors: E
authors: Lampa
mesh_terms: D000700:Analgesics / Q000138:chemical synthesis* / Q000494:pharmacology; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000138:chemical synthesis* / Q000494:pharmacology; D000959:Antihypertensive Agents / Q000138:chemical synthesis* / Q000494:pharmacology; D002264:Carboxylic Acids / Q000138:chemical synthesis* / Q000494:pharmacology; D006168:Guinea Pigs; D006325:Heart Atria / Q000187:drug effects; D066298:In Vitro Techniques; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D010975:Platelet Aggregation Inhibitors / Q000138:chemical synthesis* / Q000494:pharmacology; D011725:Pyridines / Q000138:chemical synthesis* / Q000494:pharmacology
chemical_list: D000700:Analgesics; D000894:Anti-Inflammatory Agents, Non-Steroidal; D000959:Antihypertensive Agents; D002264:Carboxylic Acids; D010975:Platelet Aggregation Inhibitors; D011725:Pyridines