7‐Amino‐2‐aryl/hetero‐aryl‐5‐oxo‐5,8‐dihydro[1,2,4]triazolo[1,5‐<i>a</i>]pyridine‐6‐carbonitriles: Synthesis and adenosine receptor binding studies
作者:Khasim Shaik、Pran Kishore Deb、Raghu Prasad Mailavaram、Balakumar Chandrasekaran、Sonja Kachler、Karl‐Norbert Klotz、Abdul Muttaleb Yousef Jaber
DOI:10.1111/cbdd.13528
日期:——
A series of novel 7‐amino‐5‐oxo‐2‐substituted‐aryl/hetero‐aryl‐5,8‐dihydro[1,2,4]triazolo[1,5‐a]pyridine‐6‐carbonitriles (4a–4t) was synthesized, characterized and evaluated for their binding affinity and selectivity towards hA1, hA2A, hA2B and hA3 adenosine receptors (ARs). Compound 4a with a phenyl ring at 2‐position of the triazolo moiety of the scaffold showed high affinity and selectivity for
一系列新颖的7-氨基-5-氧代-2-取代的芳基/杂芳基-5,8-二氢[1,2,4]三唑[1,5 - a ]吡啶-6-腈(4a– 4吨)合成,其特征在于,评价向HA的结合亲和力和选择性1,HA 2A,HA 2B和HA 3腺苷受体(ARS)。在支架的三唑部分的2位带有苯环的化合物4a对hA 1 AR(K i hA 1 = 0.076μM,hA 2A = 25.6μM和hA 3)具有高亲和力和选择性 > 100μM)。在苯环的不同位置引入各种给电子和吸电子基团,导致对所有AR的亲和力和选择性大大降低,除了在2位带有4-羟基苯基的化合物4b。有趣的是,用较小的杂环噻吩环取代苯环(π过量的体系)导致对化合物4t的hA 1 AR的亲和力进一步提高(K i hA 1 = 0.051μM,hA 2A = 9.01μM和hA 3 > 13.9μM),同时保留了对所有其他类似于化合物4a的AR亚型的