Design, synthesis and optimization of 7-substituted-pyrazolo[4,3-b]pyridine ALK5 (activin receptor-like kinase 5) inhibitors
作者:Mark Sabat、Haixia Wang、Nick Scorah、J. David Lawson、Joy Atienza、Ruhi Kamran、Mark S. Hixon、Douglas R. Dougan
DOI:10.1016/j.bmcl.2017.03.026
日期:2017.5
A series of potent ALK5 inhibitors were designed using a SBDD approach and subsequently optimized to improve drug likeness. Starting with a 4-substituted quinoline screening hit, SAR was conducted using a ALK5 binding model to understand the binding site and optimize activity. The resulting inhibitors displayed excellent potency but were limited by high in vitro clearance in rat and human microsomes
使用SBDD方法设计了一系列有效的ALK5抑制剂,随后对其进行了优化以改善药物相似性。从4-取代的喹啉筛选命中开始,使用ALK5结合模型进行SAR,以了解结合位点并优化活性。所得的抑制剂显示出优异的效力,但受到大鼠和人微粒体内体外清除率的限制。使用支架变形策略,将这些类似物转化为具有改善的ADME性能的相关吡唑并[4,3-b]吡啶系列。