signals in the innate immune response and has been proposed as a therapeutic target for the treatment of inflammatory and autoimmune diseases. Herein, a series of IRAK4 inhibitors based on a dihydrofuro[2,3-b]pyridine scaffold was developed. Structural modifications of the screening hit 16 (IC50 = 243 nM) led to IRAK4 inhibitors with improved potency but high clearance (Cl) and poor oral bioavailability
Interleukin-1 受体相关激酶 4 (IRAK4) 是先天免疫反应中控制下游 NF-κB 和
MAPK 信号的关键调节因子,已被提议作为治疗炎症和自身免疫性疾病的治疗靶点。在此,开发了一系列基于二氢
呋喃并[2,3- b ]
吡啶支架的IRAK4
抑制剂。筛选命中16 (IC 50 = 243 nM) 的结构修饰导致 IRAK4
抑制剂的效力提高,但清除率 (Cl) 高且口服
生物利用度差,如化合物21 (IC 50 = 6.2 nM,Cl = 43 ml/min) /kg,F = 1.6%,LLE = 5.4)。结构修饰旨在改善 LLE 并减少已确定的化合物38 的间隙。化合物38显示出显着改善的清除率,同时保持优异的针对IRAK4的生化效力(IC 50 = 7.3 nM,Cl = 12 ml/min/kg,F = 21%,LLE = 6.0)。重要的是,化合物38具有良好的体外安全性和