The Identification of the 2-Phenylphthalazin-1(2<i>H</i>)-one Scaffold as a New Decorable Core Skeleton for the Design of Potent and Selective Human A<sub>3</sub> Adenosine Receptor Antagonists
作者:Daniela Poli、Daniela Catarzi、Vittoria Colotta、Flavia Varano、Guido Filacchioni、Simona Daniele、Letizia Trincavelli、Claudia Martini、Silvia Paoletta、Stefano Moro
DOI:10.1021/jm101328n
日期:2011.4.14
Following a molecular simplification approach, we have identified the 2-phenylphthalazin-1(2H)-one (PHTZ) ring system as a new decorable core skeleton for the design of novel hA3 adenosine receptor (AR) antagonists. Interest for this new series was driven by the structural similarity between the PHTZ skeleton and both the 2-aryl-1,2,4-triazolo[4,3-a]quinoxalin-1-one (TQX) and the 4-carboxamido-quinazoline
遵循分子简化方法,我们已经确定了2-苯基酞菁-1(2 H)-一(PHTZ)环系统是用于设计新型hA 3腺苷受体(AR)拮抗剂的新型可修饰核心骨架。这个新系列的兴趣来自PHTZ骨架与2-芳基-1,2,4-三唑[4,3 - a ]喹喔啉-1-酮(TQX)和4-甲酰胺基-之间的结构相似性。我们以前报道的研究中对喹唑啉(QZ)支架进行了广泛的研究。我们的注意力集中在其中不同的酰氨基和脲基部分被引入(化合物酞嗪核的4位2 - 20)。一些新的PHTZ化合物显示出高的hA 3AR亲和力和选择性,其中2,5-二甲氧基苯基酞嗪-1(2 H)-one 18是该系列中最有效和选择性最强的hA 3 AR拮抗剂(K i = 0.776 nM; hA 1 / hA 3和hA 2A / hA 3 > 12000)。对PHTZ衍生物的分子对接研究表明,对于这些化合物,其结合模式与先前报道的TQX和QZ系列相似,这是简化方法所期望的。