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,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,其中至少有一个Q和Q'是
氨基或Q'是R.sub.4 NH,可用作心脏强心剂(当Q为
氨基,
氰基或
氢时的I)和/或
中间体(当Q为
氰基,
氨基甲酰基或羧基时的I)。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-
吡啶基腈(II)作为
中间体,并且还提供了制备I和II的方法。