5-HT3 receptor antagonists. 1. New quinoline derivatives
作者:Hiroaki Hayashi、Yoshikazu Miwa、Ichiro Miki、Shunji Ichikawa、Nobuyuki Yoda、Akio Ishii、Motomichi Kono、Fumio Suzuki
DOI:10.1021/jm00104a016
日期:1992.12
not observed between the affinity for the 5-HT3 receptors and the activity in the B-J reflex test (in vivo). From these data, it was suggested that our quinoline derivatives might interact with the 5-HT3 receptors in a different way from that of the reported 5-HT3 receptor antagonists presumably due to the presence of the heterogeneity of the 5-HT3 receptors between brain and heart.
合成了一系列含有碱性氮杂双环烷基部分的1-烷基-2-氧-1,2-二氢喹啉-4-羧酸或2-烷氧基喹啉-4-羧酸的酯和酰胺,并评估了其对苯甲酸酯的亲和力。 [3H] quipazine标记的5-HT3受体。大多数酯显示出比恩丹西酮强效十倍的活性(1; Ki = 7.6 nM)。喹啉环1或2位的亲脂取代基增强了对受体的亲和力。其中,化合物21和37显示出最高的亲和力(分别为Ki = 0.32和0.31nM)。另一方面,大多数酰胺的亲和力比酯低100倍。分子模型研究表明,19(酯)或31(酰胺)中的羰基部分与芳香环的平面不共面(偏差超过20度)。尽管某些选定的化合物在Bezold-Jarisch(BJ)反射测试中显示出强大的活性,但对5-HT3受体的亲和力与BJ反射测试(体内)的活性之间未观察到良好的相关性。从这些数据表明,我们的喹啉衍生物可能以与报道的5-HT3受体拮抗剂不同的方式与5-HT3受