As part of a program toward making analogues of amlexanox (1), currently under clinical investigation for the treatment of type 2 diabetes and obesity, we have synthesized derivative 5 in which deuterium has been introduced into two sites of metabolism on the C-7 isopropyl function of amlexanox. The synthesis of 5 was completed in an efficient three-step process utilizing reduction of key olefin 7b to 8 by Wilkinson's catalyst to provide specific incorporation of di-deuterium across the double bond. Compound 5 displayed nearly equivalent potency to amlexanox (IC50, 1.1μM vs 0.6μM, respectively) against recombinant human TBK1. When incubated with human, rat, and mouse liver microsomes, amlexanox (1) and d2-amlexanox (5) were stable (t1/2 > 60 minutes) with 1 showing marginally greater stability relative to 5 except for rat liver microsomes. These data show that incorporating deuterium into two sites of metabolism does not majorly suppress Cyp-mediated metabolism relative to amlexanox.
作为模拟amlexanox(1)计划的一部分,目前正在进行临床试验,以治疗2型糖尿病和肥胖症,我们已经合成了衍
生物5,其中
氘被引入到amlexanox的C-7异丙基功能上的两个代谢位点。5的合成是通过三个有效步骤完成的,利用威尔
金森催化剂将关键烯烃7b还原为8,以在双键上提供特定的二
氘结合。化合物5对
重组人TBK1的效力与amlexanox(IC50分别为1.1μM和0.6μM)几乎相当。当与人类、大鼠和小鼠的肝微粒体一起培养时,amlexanox(1)和d2-amlexanox(5)是稳定的(t1/2>60分钟),其中1相对于5显示出略高的稳定性,但大鼠肝微粒体除外。这些数据表明,与amlexanox相比,将
氘引入两个代谢位点不会显着抑制Cyp介导的代谢。