Novel 3-[4-alkoxy-3-(1H-tetrazol-1-yl) phenyl]-1,2,4-oxadiazol-5(4H)-ones as promising xanthine oxidase inhibitors: Design, synthesis and biological evaluation
作者:Jun Gao、Zhaofeng Zhang、Bing Zhang、Qing Mao、Xiwen Dai、Qian Zou、Yu Lei、Yao Feng、Shaojie Wang
DOI:10.1016/j.bioorg.2019.103564
日期:2020.1
(XO) is a critical target for the therapy of hyperuricemia and gout. In this study, a number of 3-[4-alkoxy-3-(1H-tetrazol-1-yl) phenyl]-1,2,4-oxadiazol-5(4H)-ones (3a-3w) were newly designed by a bioisosteric replacement and hybrid strategy with the hope of obtaining novel and effective nonpurine XO inhibitors. Subsequently, these compounds were synthesized through a three-step procedure, with good yields
黄嘌呤氧化酶(XO)是治疗高尿酸血症和痛风的关键靶标。在这项研究中,新设计了一些3- [4-烷氧基-3-(1H-四唑-1-基)苯基] -1,2,4-恶二唑-5(4H)-一(3a-3w)通过生物等位替代和混合策略,希望获得新型有效的非嘌呤XO抑制剂。随后,通过三步法合成了这些化合物,收率很高。另外,使用别嘌呤醇作为阳性对照,通过分光光度法测定在295 nm处的尿酸形成来测量体外牛XO抑制作用。结果,发现化合物3j是最有效的XO抑制剂,IC50值为0.121 µM,比别嘌呤醇的效价高约63倍,结构-活性关系的分析表明,在4'-位的疏水基团对于抑制效能是必不可少的。此外,分子建模结果表明,1,2,4-恶二唑-5(4H)-one部分通过与Arg880和Thr1010的各种氢键结合到XO活性位。此外,化合物3j被证明是混合型非嘌呤XO抑制剂。此外,由草酸钾诱导的对大鼠模型的降尿酸研究表明,口服剂量为15