Design and synthesis of novel 2-(indol-5-yl)thiazole derivatives as xanthine oxidase inhibitors
作者:Jeong Uk Song、Sung Pil Choi、Tae Hun Kim、Cheol-Kyu Jung、Joo-Youn Lee、Sang-Hun Jung、Geun Tae Kim
DOI:10.1016/j.bmcl.2015.01.055
日期:2015.3
we describe the structure–activity relationship for novel xanthine oxidase inhibitors based on indole scaffold. A series of novel tri-substituted 2-(indol-5-yl)thiazole derivatives were synthesized, and their in vitro inhibitory activities against xanthine oxidase and in vivo efficacy lowering uric acid level in blood were measured. Among them, 2-(3-cyano-2-isopropylindol-5-yl)-4-methylthiazole-5-carboxylic
黄嘌呤氧化酶(XO)抑制剂已被广泛用于治疗痛风。在设计酶抑制剂中,吲哚环经常用作活性支架。在这里,我们描述了基于吲哚支架的新型黄嘌呤氧化酶抑制剂的结构活性关系。合成了一系列新型的三取代的2-(吲哚-5-基)噻唑衍生物,并测定了它们对黄嘌呤氧化酶的体外抑制活性和降低血液中尿酸水平的体内功效。其中,2-(3-氰基-2-异丙基吲哚-5-基)-4-甲基噻唑-5-羧酸表现出最强的XO抑制活性(IC 50值:3.5 nM)和优异的血浆尿酸降低活性。结构活性关系的研究表明,在吲哚环的3-位的疏水部分(如异丙基)和在吲哚环的3-位的吸电子基团(例如CN)和在噻唑环的4-位的小疏水基团(CH 3)增强了XO抑制活性。在吲哚部分的1-位上进行疏水取代,例如异丙基,在2-位上没有任何取代,对提高生物利用度并因此具有很高的体内功效具有重要作用。