Design of <i>N</i>-Benzoxaborole Benzofuran GSK8175—Optimization of Human Pharmacokinetics Inspired by Metabolites of a Failed Clinical HCV Inhibitor
作者:Pek Y. Chong、J. Brad Shotwell、John Miller、Daniel J. Price、Andy Maynard、Christian Voitenleitner、Amanda Mathis、Shawn Williams、Jeffrey J. Pouliot、Katrina Creech、Feng Wang、Jing Fang、Huichang Zhang、Vincent W.-F. Tai、Elizabeth Turner、Kirsten M. Kahler、Renae Crosby、Andrew J. Peat
DOI:10.1021/acs.jmedchem.8b01719
日期:2019.4.11
non-nucleoside polymerase (NS5B) inhibitor of hepatitis C virus (HCV), in which an N-benzyl boronic acid was essential for potent antiviral activity. Unfortunately, facile benzylic oxidation resulted in a short plasma half-life (5 h) in human volunteers, and a backup program was initiated to remove metabolic liabilities associated with 1. Herein, we describe second-generation NS5B inhibitors including GSK8175
我们之前描述了GSK5852(1)的发现,GSK5852(丙型肝炎病毒(HCV)的非核苷聚合酶(NS5B)抑制剂,其中N-苄基硼酸对于有效的抗病毒活性至关重要。不幸的是,容易的苄基氧化导致人类志愿者的血浆半衰期短(5小时),并且启动了备份程序以消除与1相关的代谢负债。在此,我们介绍第二代NS5B抑制剂,包括GSK8175(49),磺酰胺-N-苯并恶唑硼酸酯类似物,在临床前物种中的体内清除率低,并且具有对抗HCV复制子的广谱活性。与49一起共结晶的NS5B蛋白的X射线结构揭示了由有序水分子的广泛网络介导的独特的蛋白-抑制剂相互作用,以及在结合袋中形成硼酸盐复合物的第一个证据。在临床研究中,49表现出60-63 h的半衰期,并且在HCV感染的患者中病毒RNA水平显着下降,从而证实了我们的假设,即相对于1而言,减少苄基氧化将改善人的药代动力学和较低的有效剂量。