From a novel HTS hit to potent, selective, and orally bioavailable KDM5 inhibitors
作者:Jun Liang、Sharada Labadie、Birong Zhang、Daniel F. Ortwine、Snahel Patel、Maia Vinogradova、James R. Kiefer、Till Mauer、Victor S. Gehling、Jean-Christophe Harmange、Richard Cummings、Tommy Lai、Jiangpeng Liao、Xiaoping Zheng、Yichin Liu、Amy Gustafson、Erica Van der Porten、Weifeng Mao、Bianca M. Liederer、Gauri Deshmukh、Le An、Yingqing Ran、Marie Classon、Patrick Trojer、Peter S. Dragovich、Lesley Murray
DOI:10.1016/j.bmcl.2017.05.016
日期:2017.7
Genentech/Roche library identified a novel, uncharged scaffold as a KDM5A inhibitor. Lacking insight into the binding mode, initial attempts to improve inhibitor potency failed to improve potency, and synthesis of analogs was further hampered by the presence of a C–C bond between the pyrrolidine and pyridine. Replacing this with a C–N bond significantly simplified synthesis, yielding pyrazole analog 35,
Genentech / Roche库的高通量筛选(HTS)确定了一种新型的不带电支架作为KDM5A抑制剂。缺乏对结合模式的了解,最初试图提高抑制剂效能的尝试未能提高效能,并且类似物的合成进一步受到吡咯烷与吡啶之间C–C键的阻碍。用C–N键代替它可以大大简化合成过程,得到吡唑类似物35,其中我们获得了与KDM5A的共晶体结构。使用基于结构的设计方法,我们确定了50种具有比原始命中产品更高的生化,细胞效力,降低的MW和更低的亲脂性(Log D)。此外,有50个零件的间隙低于9个在小鼠中。结合其在小鼠中的血浆蛋白结合率(PPB)极低(40%),以5 mg / kg的剂量口服50导致C的未结合C max约是其细胞效力的2倍(PC9 H3K4Me3 0.96μM),满足了我们的要求新支架的体内工具化合物的标准。