In order to systematically explore and understand the structure–activity relationship (SAR) of a lesinurad-based hit (1c) derived from the replacement of the S atom in lesinurad with CH2, 18 compounds (1a–1r) were designed, synthesized and subjected to in vitro URAT1 inhibitory assay. The SAR exploration led to the discovery of a highly potent flexible URAT1 inhibitor, 1q, which was 31-fold more potent than parent lesinurad (IC50 = 0.23 μM against human URAT1 for 1q vs 7.18 μM for lesinurad). The present study discovered a flexible molecular scaffold, as represented by 1q, which might serve as a promising prototype scaffold for further development of potent URAT1 inhibitors, and also demonstrated that the S atom in lesinurad was not indispensable for its URAT1 inhibitory activity.
为了系统地探索和理解基于lesinuRAd的命中化合物(1c)的结构-活性关系(
SAR),该化合物是通过将lesinuRAd中的S原子替换为
CH2得到的,设计并合成了18个化合物(1a–1r),并对其进行了体外URAT1抑制活性测试。
SAR探索发现了一个高效的柔性URAT1
抑制剂1q,其活性比母体lesinuRAd高31倍(对于人URAT1的IC50值,1q为0.23 μM,而lesinuRAd为7.18 μM)。本研究发现了一种柔性分子骨架,如1q所示,这可能作为进一步开发高效URAT1
抑制剂的有前景的原型骨架,并且表明lesinuRAd中的S原子对其URAT1抑制活性并非必需。