Novel 5-Hydroxytryptamine (5-HT3) Receptor Antagonists. I. Synthesis and Structure-Activity Relationships of Conformationally Restricted Fused Imidazole Derivatives.
作者:Mitsuaki OHTA、Takeshi SUZUKI、Tokuo KOIDE、Akira MATSUHISA、Toshio FURUYA、Keiji MIYATA、Isao YANAGISAWA
DOI:10.1248/cpb.44.991
日期:——
7-tetrahydroimidazo[4,5-c] pyridine and substituted 4,5,6,7-tetrahydro-1H-benzimidazole for 4b, 5,6,7,8-tetrahydroimidazo[1,2-a]pyridine for 4c and 5,6,7,8-tetrahydroimidazo[1,5-a]pyridine for 4d as a basic amine part and (2-methoxyphenyl)aminocarbonyl group as an aromatic-carbonyl part). Their activities were then evaluated as an 5-hydroxytryptamine (5-HT3) receptor antagonist which may be useful for
我们制备了一系列新的构象受限的稠合咪唑衍生物4b,4c和4d(具有4,5,6,7-四氢咪唑并[4,5-c]吡啶和取代的4,5,6,7-四氢-1H-苯并咪唑对于4b,对于5c,5,6,7,8-四氢咪唑并[1,2-a]吡啶为碱性胺部分;对于4b,5,6,7,8-四氢咪唑并[1,5-a]吡啶为碱性胺部分,和(2 -甲氧基苯基)氨基羰基作为芳族羰基部分)。然后将其活性评估为5-羟色胺(5-HT3)受体拮抗剂,该拮抗剂可用于治疗肠易激综合症(IBS)以及与癌症化学疗法相关的恶心和呕吐。最有效的化合物是该系列中的N-(2-甲氧基苯基)-4,5,6,7-四氢-1H-苯并咪唑-5-羧酰胺14,ID50值为0。在大鼠的von Bezold-Jarisch反射上为32微克/千克,在豚鼠的孤立结肠收缩中IC50值为0.43 microM,分别比恩丹西酮1强十倍和两倍。结构活性关系(SAR)研究表明,14的高效力