Synthesis of 2-(4-substituted-1-piperazinyl)benzimidazoles as H1-antihistaminic agents
作者:Ryuichi Iemura、Tsuneo Kawashima、Toshikazu Fukuda、Keizo Ito、Goro Tsukamoto
DOI:10.1021/jm00157a010
日期:1986.7
A series of 2-(4-substituted-1-(homo)piperazinyl)benzimidazoles was prepared and tested for H1-antihistaminic activity in vitro and in vivo. Most of the compounds showed antihistaminic activity and some of the 1-[2-(substituted-oxy)ethyl] derivatives exhibited potent activity. In a structure-activity comparison it was found that the oxygen atom in the 2-(substituted-oxy)ethyl group at the 1-position
制备了一系列的2-(4-取代的-1-(高)哌嗪基)苯并咪唑,并在体内和体外测试了H1-抗组胺活性。大多数化合物显示出抗组胺活性,而某些1- [2-(取代-氧基)乙基]衍生物则显示出有效的活性。在结构活性比较中,发现苯并咪唑核的1-位上的2-(取代-氧)乙基中的氧原子对于有效的抗组胺活性,特别是在体内具有重要作用。最有效的化合物之一1-(2-乙氧基乙基)-2-(4-甲基-1-高哌嗪基)苯并咪唑(69)的体内H1抗组胺活性比马来酸氯苯那敏高39倍,因此被选作临床评估。