Synthesis and Biological Evaluation of a New Series of 1,2,4-Triazolo[1,5-<i>a</i>]-1,3,5-triazines as Human A<sub>2A</sub> Adenosine Receptor Antagonists with Improved Water Solubility
作者:Stephanie Federico、Silvia Paoletta、Siew Lee Cheong、Giorgia Pastorin、Barbara Cacciari、Stefano Stragliotto、Karl Norbert Klotz、Jeffrey Siegel、Zhan-Guo Gao、Kenneth A. Jacobson、Stefano Moro、Giampiero Spalluto
DOI:10.1021/jm101349u
日期:2011.2.10
5-triazine derivatives related to ZM241385 as antagonists of the A2A adenosine receptor (AR) was explored through the synthesis of analogues substituted at the 5 position. The A2A AR X-ray structure was used to propose a structural basis for the activity and selectivity of the analogues and to direct the synthetic design strategy to provide access to solvent-exposed regions. Thus, we have identified a
与 ZM241385 相关的 1,2,4-三唑并[1,5- a ]-1,3,5-三嗪衍生物作为 A 2A腺苷受体 (AR) 的拮抗剂的构效关系 (SAR)通过5位取代的类似物的合成。A 2A AR X 射线结构用于为类似物的活性和选择性提出结构基础,并指导合成设计策略以提供对溶剂暴露区域的访问。因此,我们确定了增溶基团连接的替代点,以增强水溶性和物理化学性质,保持与 A 2A 的有效相互作用AR,在某些情况下,还有受体亚型选择性。最有效和最具选择性的新型化合物是含长链醚的胺同系物20 ( K i 11.5 nM) 及其氨基甲酸酯保护的衍生物14 ( K i 17.8 nM)。化合物20和31(K i分别为 11.5 和 16.9 nM)易溶于水,浓度高达 10 mM。类似物对接在 hA 2A AR的晶体结构和 hA 3 AR的同源模型中,每个残基 对结合的静电和疏水作用进行了评估,并提出了稳定因素。