A novel class of cardiotonics. Synthesis and pharmacological properties of [4-(substituted-amino)phenyl]pyridazinones and related derivatives
作者:Hiromi Okushima、Akihiro Narimatsu、Makio Kobayashi、Rikizo Furuya、Kunio Tsuda、Yoshimi Kitada
DOI:10.1021/jm00390a007
日期:1987.7
A series of [4-(substituted-amino)phenyl]pyridazinones and [4-(substituted-methyl)amino]phenyl]pyridazinones was synthesized and evaluated for inotropic activity in vitro and for cardiohemodynamic effects in vivo. Above all, 6-[4-(4-pyridylamino)phenyl]-4,5-dihydro-3(2H)-pyridazinone hydrochloride (4, MCI-154) and 6-[4-(4-pyridylamino)phenyl]-5-methyl-4,5-dihydro-3(2H)-pyridazinone hydrochloride (5)
合成了一系列的[4-(取代的氨基)苯基]吡啶酮酮和[4-(取代的甲基)氨基]苯基]吡啶酮酮,并评估了其体外的正性肌力活性和体内的心电动力学效应。最重要的是,6- [4-(4-吡啶基氨基)苯基] -4,5-二氢-3(2H)-哒嗪酮盐酸盐(4,MCI-154)和6- [4-(4-吡啶基氨基)苯基]- 5-甲基-4,5-二氢-3(2H)-哒嗪酮盐酸盐(5)具有极强的正性肌力活性和血管舒张活性。关于dP / dtmax(心脏收缩力的指标),化合物4和5的ED30(使dP / dtmax增加30%的剂量)分别为8.5 +/- 1.9和4.4 +/- 0.6微克/ kg。氨力农为471.9 +/- 94.1毫克/千克。提出了这些系列的构效关系,并讨论了一个可能的受体结合模型。