5-Amino-2-phenyl[1,2,3]triazolo[1,2-<i>a</i>][1,2,4]benzotriazin-1-one: A Versatile Scaffold To Obtain Potent and Selective A<sub>3</sub> Adenosine Receptor Antagonists
作者:Federico Da Settimo、Giampaolo Primofiore、Sabrina Taliani、Anna Maria Marini、Concettina La Motta、Francesca Simorini、Silvia Salerno、Valentina Sergianni、Tiziano Tuccinardi、Adriano Martinelli、Barbara Cosimelli、Giovanni Greco、Ettore Novellino、Osele Ciampi、Maria Letizia Trincavelli、Claudia Martini
DOI:10.1021/jm0708376
日期:2007.11.1
Binding assays on human A1, A2A, and A3 adenosine receptors (ARs) and functional studies on A2B ARs revealed that various 2-phenyl[1,2,3]triazolo[1,2-a][1,2,4]benzotriazin-1,5(6H)-diones VIII, previously reported as ligands at the central benzodiazepine receptor (BzR), possess nanomolar affinity at the A3 AR. Replacement of the amide of VIII with an amidine moiety gave the 5-amino-2-phenyl[1,2,3]triazolo[1
对人A1,A2A和A3腺苷受体(AR)的结合测定以及对A2B AR的功能研究表明,各种2-苯基[1,2,3]三唑[1,2-a] [1,2,4]苯并三嗪-1,5(6H)-二酮VIII,先前报道为在中央苯并二氮杂receptor受体(BzR)处的配体,在A3 AR处具有纳摩尔摩尔亲和力。用am部分取代VIII的酰胺,得到5-氨基-2-苯基[1,2,3]三唑并[1,2-a] [1,2,4]苯并三嗪-1-酮IX,其维持在A3 AR处的纳摩尔效价,对BzR的选择性。对甲氧基苯甲酰基在5-氨基部分的插入增强了A3 AR的亲和力和对A1,A2A和A2B AR的选择性。我们进行前导优化工作的最佳结果是9-氯-5-(4-甲氧基苯甲酰基)氨基-2-苯基[1,2,3]三唑[1,2-a] [1,2,4]苯并三嗪- 1-one(23),显示Ki为1。在A3 AR处为6 nM,在其他AR或BzR处无显着亲和力。将所选配体对接模拟到A3