5-(Pyridinyl)-6-(lower-alkyl)-2(1H)-pyridinones, 1,2-dihydro-2-oxo-5-(pyridinyl)-6-(lower-alkyl)nicotinic acids and lower-alkyl esters thereof, and cardiotonic use thereof

摘要

1-R1-6-(lower-alkyl)-5-(pyridinyl)-2(1H)-pyridinones or 1-R1-1,2-dihydro-2-oxo-6-(lower-alkyl)-5-(pyridinyl)nicotinic acids or lower-alkyl esters thereof or pharmaceutically-acceptable acid-addition or cationic salts thereof are useful as cardiotonic agents, where R1 is hydrogen, lower-alkyl or lower-hydroxyalkyl. These compounds are prepared by hydrolyzing the corresponding 3-cyano compounds to produce the corresponding 3-carboxylic acids and then either by decarboxylating or esterifying the acids.