Reactions of-methyl-2(3H)-thiazolones (5) with various N-alkoxycarbonyl pyridinium salts (6a-f) led to (N-alkoxycarbonyl dihydropyridyl)thiazolones (7a-f), oxidation of which yielded a new class of 5-pyridylthiazolones (8a-f). These reactions were applied to the synthesis of other azaarylthiazolones. Some of these azaarylthiazolones, particualrly 5-(4-pyridyl)thiazolones (8b, c) and 5-(4-quinolyl)thiazolones (14a, b), showed positive inotropic activity with little chronotropic effect on guinea pig left atria.
用各种N-烷氧羰基
吡啶镮盐(6a-f)与-甲基-2(3H)-
噻唑啉酮(5)反应,得到(N-烷氧羰基
二氢吡啶基)
噻唑啉酮(7a-f)。使其氧化后得到一个新的5-
吡啶基
噻唑啉酮(8a-f)类化合物。将这些反应应用于其他氮杂芳基
噻唑啉酮的合成。其中某些氮杂芳基
噻唑啉酮,特别是5-(4-
吡啶基)
噻唑啉酮(8b,c)和5-(4-
喹啉基)
噻唑啉酮(14a,b),对豚鼠左心房表现出正性肌力作用,而对心率的作用很小。