Pyrimido[5,4-b]indole derivatives. 1. A new class of potent and selective .alpha.1 adrenoceptor ligands
作者:Filippo Russo、Giuseppe Romeo、Salvatore Guccione、Antonio De Blasi
DOI:10.1021/jm00110a014
日期:1991.6
3-substituted pyrimido[5,4-b]indole-2,4-diones (7-23) were evaluated for their in vitro alpha 1 adrenoceptor affinity by radioligand receptor binding assays. Some compounds bearing a (phenylpiperazinyl)alkyl side chain were potent alpha 1 adrenoceptor ligands. The most active derivative in displacement of [3H]prazosin from rat cortical membranes was 3-[2-[4-(2-methoxyphenyl)piperazin-1-yl]ethyl]pyrimido[5,4-b]indol
通过放射性配体受体结合测定评估了许多3-取代的嘧啶并[5,4-b]吲哚-2,4-二酮(7-23)的体外α1肾上腺素受体亲和力。一些带有(苯基哌嗪基)烷基侧链的化合物是有效的α1肾上腺素受体配体。从大鼠皮膜置换[3H]吡唑嗪最活跃的衍生物是3- [2- [4-(2-甲氧基苯基)哌嗪-1-基]乙基]嘧啶基[5,4-b]吲哚e-2, 4-二酮(10)(Ki = 0.21 nM)。结构的离散修饰导致对alpha 1的选择性(大于10,000倍)比alpha 2,beta 2和5HT1A受体更高。一些化合物也对5HT1A受体具有亲和力。最具选择性的α1配体是3- [2- [4-(2-氯苯基)哌嗪-1-基]乙基]嘧啶基[5,4-b]吲哚-2,4-二酮(13)。