in affinity and selectivity. Branching alpha to the amide carbonyl group and increased bulkiness of the alkyl moiety further improved 5-HT1A affinity and selectivity. 4-[4-(1-Adamantanecarboxamido)butyl]-1- (2-methoxyphenyl)piperazine (2j) was found to bind at 5-HT1A sites with high affinity (Ki = 0.4 nM) and with a 160-fold selectivity over alpha 1-adrenergic sites. Preliminary studies show that this
1-(2-
甲氧基苯基)-4- [4-(2-邻苯二甲
酰亚胺基)丁基]
哌嗪(NAN-190; 1a)是一种可能的突触后5-HT1A 5-羟
色胺拮抗剂。这种高亲和力
配体(Ki = 0.6 nM)尽管对5-HT1A具有选择性,但对其他5-HT受体具有选择性,但在α1-
肾上腺素受体(Ki = 0.8 nm)处具有几乎相同的亲和力。进行结构亲和关系研究以实现改进的选择性。用取代的苯甲酰胺替代邻苯二甲
酰亚胺部分导致保留5-HT1A亲和力,但选择性没有改善,而烷基酰胺替代证明是有益的,从而导致亲和力和选择性提高。将α分支到酰胺羰基上并增加烷基部分的体积,进一步提高了5-HT1A的亲和力和选择性。发现4- [4-(1-
金刚烷甲酰胺基)丁基] -1-(2-
甲氧基苯基)
哌嗪(2j)在5-HT1A位点具有高亲和力(Ki = 0.4 nM)结合,选择性是后者的160倍。 α1
肾上腺素位点。初步研究表明,该药物保留了