Discovery of Functionally Selective 7,8,9,10-Tetrahydro-7,10-ethano-1,2,4-triazolo[3,4-<i>a</i>]phthalazines as GABA<sub>A</sub> Receptor Agonists at the α<sub>3</sub> Subunit
作者:Michael G. N. Russell、Robert W. Carling、John R. Atack、Frances A. Bromidge、Susan M. Cook、Peter Hunt、Catherine Isted、Matt Lucas、Ruth M. McKernan、Andrew Mitchinson、Kevin W. Moore、Robert Narquizian、Alison J. Macaulay、David Thomas、Sally-Anne Thompson、Keith A. Wafford、José L. Castro
DOI:10.1021/jm040883v
日期:2005.3.1
We have previously identified the 7,8,9,10-tetrahydro-7,10-ethano-1,2,4-triazolo[3,4-a]phthalazine (1) as a potent partial agonist for the alpha(3) receptor subtype with 5-fold selectivity in binding affinity over alpha(1). This paper describes a detailed investigation of the substituents on this core structure at both the 3- and 6-positions. Despite evaluating a wide range of groups, the maximum selectivity
我们之前已经确定了7,8,9,10-四氢-7,10-乙醇-1,2,4-三唑并[3,4-a]酞嗪(1)是α(3)的有效部分激动剂。受体亚型,对α(1)的结合亲和力具有5倍的选择性。本文描述了在此核心结构的3位和6位上的取代基的详细研究。尽管评估了广泛的组,但相对于alpha(1)亚型,对alpha(3)亚型的亲和力可达到的最大选择性是12倍(对于57)。尽管大多数类似物在功效上均未显示选择性,但一些类似物确实在α(1)处表现出部分激动作用,而在α(3)处表现出拮抗作用(例如25和75)。但是,测试了两个类似物(93和96),它们都在6位上有三唑取代基,显示出对alpha(3)亚型的疗效明显高于alpha(1)亚型。这是该系列中可以在所需方向上实现选择性的第一个迹象。