The binding of a series of phenylpiperazines (3) and benzoylpiperazines (4) to central serotonin (5-HT) sites was investigated. Several derivatives of 3 displayed nanomolar affinities for 5-HT1 sites, whereas derivatives of 4 were essentially inactive both at 5-HT1 and 5-HT2 sites. 1-(2-Methoxyphenyl)piperazine (2-MPP, 3a) was found to possess an affinity (Ki = 35 nM) for 5-HT1 sites comparable to
研究了一系列苯基
哌嗪(3)和苯甲酰基
哌嗪(4)与5-羟
色胺中心部位的结合。3的几种衍
生物显示出对5-HT1位点的纳摩尔亲和力,而4的衍
生物在5-HT1和5-HT2位点上基本上没有活性。发现1-(2-
甲氧基苯基)
哌嗪(2-
MPP,3a)对5-HT1位点具有亲和力(Ki = 35 nM)与公认的5-HT激动剂1- [3-(三
氟甲基)苯基]
哌嗪(TF
MPP)(Ki = 20 nM);图3a还显示了对5-HT1位点的100倍选择性(相比于TF
MPP的8倍)。在使用训练以从盐
水中区分TF
MPP(ED50 = 0.17 mg / kg)的大鼠进行的刺激泛化测试中,发现3a与训练药物几乎等效(ED50 = 0.22 mg / kg)。