Specific inhibition of ALK5 provides a novel method for controlling the development of cancers and fibrotic diseases. In this work, a novel series of N-(3-fluorobenzyl)-4-(1-(methyl-d₃)-1H-indazol-5-yl)-5-(6-methylpyridin-2-yl)-1H-imidazol-2-amine (11), a potential clinical candidate, was synthesized by strategic incorporation of deuterium at potential metabolic soft spots and identified as ALK5 inhibitors. This compound has a low potential for CYP-mediated drug-drug interactions as a CYP450 inhibitor (IC₅₀ = >10 μM) and showed potent inhibitory effects in cellular assay (IC₅₀ = 3.5 ± 0.4 nM). The pharmacokinetic evaluation of 11 in mice demonstrated moderate clearance (29.0 mL/min/kg) and also revealed high oral bioavailability in mice (F = 67.6%).

特异性抑制 ALK5 为控制癌症和纤维化疾病的发展提供了一种新方法。在这项工作中，一系列新的N -(3-fluorobenzyl)-4-(1-(methyl-d ₃ )-1 H -indazol-5-yl)-5-(6-methylpyridin-2-yl)- 1 H -imidazol-2-amine ( 11 ) 是一种潜在的临床候选药物，通过在潜在代谢软点处战略性掺入氘合成，并被鉴定为 ALK5 抑制剂。该化合物作为 CYP450 抑制剂 (IC ₅₀  = >10 μM) 对 CYP 介导的药物-药物相互作用具有低潜力，并在细胞测定中显示出有效的抑制作用 (IC ₅₀  = 3.5 ± 0.4 nM)。11的药代动力学评价在小鼠中表现出适度的清除率 (29.0 mL/min/kg)，并且在小鼠中还显示出高口服生物利用度 ( F  = 67.6%)。