The pyrazolo[1,5-a]pyrimidine LDN-193189 is a potent inhibitor of activin receptor-like kinase 2 (ALK2) but is nonselective for highly homologous ALK3 and shows only modest kinome selectivity. Herein, we describe the discovery of a novel series of potent and selective ALK2 inhibitors by replacing the quinolinyl with a 4-(sulfamoyl)naphthyl, yielding ALK2 inhibitors that exhibit not only excellent discrimination versus ALK3 but also high kinome selectivity. In addition, the optimized compound 23 demonstrates good ADME and in vivo pharmacokinetic properties.

中文翻译：

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发现3-（4-氨磺酰基萘基）吡唑并[1,5- a ]嘧啶作为有效和选择性的ALK2抑制剂

吡唑并[1，5 - a ]嘧啶LDN-193189是激活素受体样激酶2（ALK2）的有效抑制剂，但对高度同源的ALK3没有选择性，并且仅显示适度的激酶组选择性。在本文中，我们描述了通过用4-（氨磺酰基）萘基取代喹啉基，产生一系列ALK2抑制剂的新发现，这些ALK2抑制剂不仅显示出对ALK3的出色区分能力，而且还具有较高的动因选择性。另外，优化的化合物23表现出良好的ADME和体内药代动力学特性。