3-Q-4-R.sub.2 -5-(2-Q'-5-R.sub.3 -4-thiazolyl)-6-R.sub.1 -2(1H)-pyridinones (I), where R.sub.1 is alkyl having from one to four carbon atoms, R.sub.2 is hydrogen or methyl, R.sub.3 is hydrogen or alkyl having from one to three carbon atoms, Q is amino, carbamyl, carboxy, cyano or hydrogen, and Q' is alkyl having from one to four carbon atoms, amino or R.sub.4 NH where R.sub.4 is alkyl having from one to four carbon atoms, or acid-addition salts thereof where at least one of Q and Q' is amino or Q' is R.sub.4 NH, are useful as cardiotonics (I where Q is amino, cyano or hydrogen) and/or as intermediates (I where Q is cyano, carbamyl or carboxy). Also shown as intermediates are 1,2-dihydro-4-R.sub.2 -5-[R.sub.3 CH(Br)CO]-6-R.sub.1 -2-oxo-3-pyridinecarbonitriles (II), and, also, processes for preparing I and II.
3-Q-4-R.sub.2 -5-(2-Q'-5-R.sub.3 -4-
噻唑基)-6-R.sub.1 -2(1H)-
吡啶酮(I),其中R.sub.1是具有一到四个碳原子的烷基,R.sub.2是氢或甲基,R.sub.3是氢或具有一到三个碳原子的烷基,Q是
氨基,
氨基甲酰基,羧基,
氰基或氢,而Q'是具有一到四个碳原子的烷基,
氨基或R.sub.4 NH,其中R.sub.4是具有一到四个碳原子的烷基,或其酸加成盐,其中至少一个Q和Q'是
氨基或Q'是R.sub.4 NH,可用作心力衰竭药物(I,其中Q为
氨基,
氰基或氢),和/或中间体(I,其中Q为
氰基,
氨基甲酰基或羧基)。还显示了1,2-二氢-4-R.sub.2 -5-[R.sub.3 CH(Br)CO]-6-R.sub.1 -2-氧代-3-
吡啶碳腈(II)作为中间体,以及制备I和II的过程。