3,4-Dihydro-3-R1-4-R2-5-Q-6-R-2 (1H)-pyridinones (I), where R1 and R2 are each hydrogen or methyl, R is lower-alkyl, and Q is 4 (or 3)-hydroxyphenyl, 4 (or 3)-methoxyphenyl, 4 (or 3)-pyridinyl or 4 (or 3)-pyridinyl having one or two lower-alkyl substituents, or acid-addition salts thereof, as well as the corresponding 3-R1-4-R2-5-Q-6-R-2 (1H)-pyridinones where at least one of R1 and R2 is methyl. The compounds have cardiotonic use when Q is 4 (or 3)-hydroxyphenyl, 4 (or 3)-pyridinyl or 4 (or 3)-pyridinyl having one or two lower-alkyl substituents. Said compounds are prepared from butanenitriles, butanoates, acrylamides or mixtures of alkanones and acetoacetamide, with optional conversion of the 3,4-dihydro compounds obtained to the 3,4-unsaturated compounds by heating with sulfur in an inert solvent and conversion of the methoxyphenyl compounds to the hydroxyphenyl compounds.
3,4-二
氢-3-R1-4-R2-5-Q-6-R-2 (1H)-
吡啶酮 (I),其中 R1 和 R2 分别为
氢或
甲基,R 为低级烷基,Q 为 4(或 3)-羟基
苯基、4(或 3)-
甲氧基苯基、4(或 3)-
吡啶基或具有一个或两个低级烷基取代基的 4(或 3)-
吡啶基,或其酸加成盐、4(或 3)-
吡啶基或具有一个或两个低级烷基取代基的 4(或 3)-
吡啶基,或其酸加成盐,以及相应的 3-R1-4-R2-5-Q-6-R-2 (1H)-pyridinones (其中 R1 和 R2 中至少有一个是
甲基)。当 Q 为 4(或 3)-羟基
苯基、4(或 3)-
吡啶基或具有一个或两个低级烷基取代基的 4(或 3)-
吡啶基时,这些化合物具有强心作用。上述化合物由
丁烯腈、
丁酸盐、
丙烯酰胺或烷
酮和乙酰乙
酰胺的混合物制备,可选择在惰性溶剂中用
硫加热,将得到的 3,4-二
氢化物转化为 3,4-不饱和化合物,并将
甲氧基苯基化合物转化为羟基
苯基化合物。