Selective Benzopyranone and Pyrimido[2,1-<i>a</i>]isoquinolin-4-one Inhibitors of DNA-Dependent Protein Kinase: Synthesis, Structure−Activity Studies, and Radiosensitization of a Human Tumor Cell Line in Vitro
作者:Roger J. Griffin、Gabriele Fontana、Bernard T. Golding、Sophie Guiard、Ian R. Hardcastle、Justin J. J. Leahy、Niall Martin、Caroline Richardson、Laurent Rigoreau、Martin Stockley、Graeme C. M. Smith
DOI:10.1021/jm049526a
日期:2005.1.1
scaffolds were less potent. Crucially, these studies revealed a very constrained structure-activity relationship at the 2-position of the benzopyranone and pyrimido[2,1-a]isoquinolin-4-one pharmacophore, with only a 2-morpholino or 2-(2'-methylmorpholino) group being tolerated at this position. More detailed biological studies conducted with the most potent inhibitor NU7163 (48; IC(50) = 0.19 microM) demonstrated
合成了各种各样的chromen-2-one,chromen-4-one和pyrimidoisoquinolin-4-one衍生物,并评估了其对DNA修复酶DNA依赖性蛋白激酶(DNA-PK)的抑制活性,目的是阐明效价和激酶选择性的构效关系。DNA-PK抑制活性在评估的一系列化合物(IC(50)值范围从0.19到> 10 microM)上有很大差异,其中7,8-苯并铬基-4-酮和嘧啶基[2,1]表现出优异的活性。 -a] isoquinolin-4-one模板。相比之下,基于苯并色素-2-酮(香豆素)或2-芳基-7,8-苯并色素-4-酮(黄酮)支架的抑制剂效力较低。至关重要的是,这些研究揭示了在苯并吡喃酮和嘧啶基2位上的结构活性关系非常受约束[2,1-a]异喹啉-4-酮药效基团,在此位置仅可耐受2-吗啉代或2-(2'-甲基吗啉代)基团。用最有效的抑制剂NU7163(48; IC(50)= 0