2-Aryl-8-chloro-1,2,4-triazolo[1,5-a]quinoxalin-4-amines as highly potent A1 and A3 adenosine receptor antagonists
作者:Daniela Catarzi、Vittoria Colotta、Flavia Varano、Francesca Romana Calabri、Ombretta Lenzi、Guido Filacchioni、Letizia Trincavelli、Claudia Martini、Andrea Tralli、Christian Montopoli、Stefano Moro
DOI:10.1016/j.bmc.2004.10.050
日期:2005.2
hydrogen-bonding interactions with specific sites on the A3 AR, has been confirmed. Using our recently published hA3 receptor model, to better elucidate our experimental results, we decided to theoretically depict the putative TM binding motif of the herein reported 1,2,4-triazolo[1,5-a]quinoxaline derivatives on human A3 receptor. Structure-activity relationships have been explained analyzing the three-dimensional
一些2-芳基-8-氯-1,2,4-三唑并[1,5-a]喹喔啉衍生物2-18,是通过在4-氨基部分(酰基或氨基甲酰基)或2-氨基上引入不同的取代基而获得的先前报道的8-氯-2-苯基-1,2,4-三唑[1,5-a]喹喔啉-4-胺(1)的-苯环(4-OCH3)已被合成并在放射性配体结合中进行了测试牛A1和A(2A)以及克隆的人A1和A3腺苷受体的RNA检测。合理设计的8-氯-2-(4-甲氧基-苯基)-1,2,4-三唑并[1,5-a]喹喔啉-4-乙酰基胺(14)被认为是最有效的药物之一,而hA3与迄今为止,已有hA1选择性AR拮抗剂报道。化合物2-18的结构活性关系与先前报道的2-芳基-1,2,4-三唑并[4,3-a]喹喔啉(A系列)和2-芳基吡唑并[3,4- c]喹啉(系列B),因此暗示了类似的AR绑定模式。实际上,已经确认了强酸性NH质子供体和位置4处的C = O质子受体对A3受体-配体相互作用的重要性,能够与A3