Design, synthesis and biological evaluation of 1-alkyl-5/6-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-1H-indole-3-carbonitriles as novel xanthine oxidase inhibitors
作者:Jun Gao、Xuegui Liu、Bing Zhang、Qing Mao、Zhuo Zhang、Qian Zou、Xiwen Dai、Shaojie Wang
DOI:10.1016/j.ejmech.2020.112077
日期:2020.3
Xanthine oxidase (XO) has emerged as an important target for the treatment of hyperuricemia and gout. In this study, to obtain novel nonpurine XO inhibitors, a series of 1-alkyl-5/6-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)-1H-indole-3-carbonitriles (1a-1u, 2c, 2e, 2h and 2n) were designed using a bioisosteric replacement strategy and were synthesized through a five-step procedure with good yields.
黄嘌呤氧化酶(XO)已成为治疗高尿酸血症和痛风的重要靶标。在这项研究中,要获得新型的非嘌呤XO抑制剂,需要一系列1-烷基-5 / 6-(5-氧代-4,5-二氢-1,2,4-氧二唑-3-基)-1H-吲哚-使用生物等位取代策略设计3-腈(1a-1u,2c,2e,2h和2n),并通过五步法合成,收率高。此后,通过分光光度法评估了这些化合物的体外XO抑制能力,显示了在微摩尔/亚微摩尔范围内的抑制特性。特别地,化合物1h成为最强的XO抑制剂,IC50值为0.36μM,比阳性对照别嘌呤醇的效价高约21倍。此外,结构与活性的关系揭示了5-oxo-4,5-dihydro-1,2,在XO抑制效能上,在吲哚支架的5-位连接的4-恶二唑部分比6-位更优选。酶动力学研究表明,化合物1h充当混合型XO抑制剂。此外,对化合物1h进行了分子建模研究,以深入了解其与XO的结合模式。结果表明,5-oxo-4,5-dihydro-1