2(1H)-Quinolinones with cardiac stimulant activity. 1. Synthesis and biological activities of (six-membered heteroaryl)-substituted derivatives
作者:Colin T. Alabaster、Andrew S. Bell、Simon F. Campbell、Peter Ellis、Christopher G. Henderson、David A. Roberts、Keith S. Ruddock、Gillian M. R. Samuels、Mark H. Stefaniak
DOI:10.1021/jm00118a034
日期:1988.10
heart rate were observed. Compounds 3, 4, 26, and 27 also selectively stimulated the force of contraction, rather than heart rate, in the dog heart-lung preparation. For a 50% increase in dP/dt max with 27, heart rate changed by less than 10 beats/min. In norepinephrine contracted rabbit femoral artery and saphenous vein, 27 produced dose related (5 X 10(-7) to 5 X 10(-4) M) vasorelaxant activity.
合成了一系列(六元杂芳基)取代的2(1H)-喹啉酮(1),并确定了与心脏刺激活性的结构-活性关系。大多数化合物是通过将钯催化的交叉偶联方法得到的杂芳基-2-甲氧基喹啉进行酸性水解而制得的。吡啶基锌试剂与6-卤代喹啉酮的直接反应也被证明是成功的。在麻醉的狗中,6-吡啶-3--3-yl-2(1H)-喹啉酮(3; 50微克/千克)比位置异构体(2、4-6)显示出更大的正性肌力活动(dP / dt max的增加百分比),并用单(13、15)或二(16)烷基吡啶基取代基维持效能。将4-(24)或7-(25)甲基引入3会降低正性肌力,而8-异构体(26)被证明是该系列中最有效的成员。化合物26和2,6-二甲基吡啶基类似物(27)的效力比米力农高约6倍和3倍。口服(1 mg / kg)后,有意识的犬中有几种喹啉酮类药物表现出正性肌力活性(QA间隔降低),其中26、27再次是该系列中最有效的成员。化合物27(0