Antiemetic and migraine suppressing heterocyclic compounds and pharmaceutical compositions containing them
申请人:KYOWA HAKKO KOGYO CO., LTD
公开号:EP0458636A1
公开(公告)日:1991-11-27
Antiemetic and migraine suppressant compounds are disclosed being heterocyclic compounds of the
wherein R¹ represents hydrogen, C₁-C₆ alkyl or C₆ - C₁₀; R² represents hydrogen, hydroxyl or C₁ - C₆ alkyl; A represents CH or N; X represents -O- or -NH-; R³ represents hydrogen, hydroxyl or C₁-C₆ alkyl; R⁴ represents C₁-C₆ alkyl; and n represents 0 or 1, and their pharmaceutically acceptable salts.
not observed between the affinity for the 5-HT3receptors 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-HT3receptors in a different way from that of the reported 5-HT3receptorantagonists presumably due to the presence of the heterogeneity of the 5-HT3receptors 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