<i>N-</i>Arylpiperazinyl-<i>N</i>‘<i>-</i>propylamino Derivatives of Heteroaryl Amides as Functional Uroselective α<sub>1</sub>-Adrenoceptor Antagonists
作者:Todd R. Elworthy、Anthony P. D. W. Ford、Gary W. Bantle、David J. Morgans,、Rachel S. Ozer、Wylie S. Palmer、David B. Repke、Magarita Romero、Leticia Sandoval、Eric B. Sjogren、Francisco X. Talamás、Alfredo Vazquez、Helen Wu、Nicolas F. Arredondo、David R. Blue,、Andrea DeSousa、Lisa M. Gross、M. Shannon Kava、John D. Lesnick、Rachel L. Vimont、Timothy J. Williams、Quan-Ming Zhu、Jürg R. Pfister、David E. Clarke
DOI:10.1021/jm970166j
日期:1997.8.1
Novel arylpiperazines were identified as alpha(1)-adrenoceptor(BR) subtype-selective antagonists by functional in vitro screening. 3-[4-(ortho-Substituted phenyl)piperazin-1-yl]propylamines were derivatized with N,N-dimethyl anthranilamides, nicotinamides,;as well as carboxamides of quinoline, I,8-naphthyridine, pyrazolo[3,4-b]pyridine, isoxazolo[3,4-b]pyridine, imidazo[4,5-b]pyridine, and pyrazolo[1,5-a]pyrimidines. Strips of rabbit bladder neck were employed as a predictive assay for antagonism in the human lower tract. Rings of rat aorta;a were used as a ''negative screen'' for the test antagonists. Binding to alpha(1)-ARs was relatively sensitive to size and electronic features of the arylpiperazine portion of the antagonists and permissive to these features on the heteroaryl carboxamide side. These structure-affinity findings were exploited to produce nicotinamides (e.g, 13ii and 25x) and pyrazolo[3,4-b]pyridines (e.g. 37f and 37y) ligands with nanomolar affinity at the alpha(1)-AR subtype prevalent in the human lower urinary tract (pA(2) values: 8.8, 10.7, 9.3, and 9.9, respectively) and displaying 2-3 orders of magnitude selectivity over the alpha(1D)-AR.