A series of 2,7-disubstituted-thieno[3,2-d]pyrimidine derivatives were designed, synthesized and evaluated as novel focal adhesion kinase (FAK) inhibitors. The novel 2,7-disubstituted-thieno[3,2-d]pyrimidine scaffold has been designed as a new kinase inhibitor platform that mimics the bioactive conformation of the well-known diaminopyrimidine motif. Most of the compounds potently suppressed the enzymatic activities of FAK and potently inhibited the proliferation of U-87MG, A-549 and MDA-MB-231 cancer cell lines. Among these derivatives, the optimized compound 26f potently inhibited the enzyme (IC50 = 28.2 nM) and displayed stronger potency than TAE-226 in U-87MG, A-549 and MDA-MB-231 cells, with IC50 values of 0.16, 0.27, and 0.19 μM, respectively. Compound 26f also exhibited relatively less cytotoxicity (IC50 = 3.32 μM) toward a normal human cell line, HK2. According to the flow cytometry results, compound 26f induced the apoptosis of MDA-MB-231 cells in a dose-dependent manner and effectively arrested MDA-MB-231 cells in G0/G1 phase. Further investigations revealed that compound 26f potently suppressed the migration of MDA-MB-231 cells. Collectively, these data support the further development of compound 26f as a lead compound for FAK-targeted anticancer drug discovery.

中文翻译：

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设计，合成，生物学评估和分子对接研究作为有效的FAK抑制剂的新型噻吩并[3,2-d]嘧啶衍生物。

设计，合成和评价了一系列的2,7-二取代-噻吩并[3,2-d]嘧啶衍生物，作为新型的粘着斑激酶（FAK）抑制剂。新型的2,7-二取代-噻吩并[3,2-d]嘧啶骨架已被设计为一种新的激酶抑制剂平台，可模仿众所周知的二氨基嘧啶基序的生物活性构象。大多数化合物有效抑制FAK的酶活性，并有效抑制U-87MG，A-549和MDA-MB-231癌细胞系的增殖。在这些衍生物中，优化的化合物26f在U-87MG，A-549和MDA-MB-231细胞中均能有效抑制酶（IC50 = 28.2 nM），并显示出比TAE-226更强的效力，IC50值为0.16、0.27，和0.19μM。化合物26f还具有相对较低的细胞毒性（IC50 = 3）。32μM）朝向正常人细胞株HK2。根据流式细胞术结果，化合物26f以剂量依赖性方式诱导MDA-MB-231细胞的凋亡，并有效地将MDA-MB-231细胞阻滞在G0 / G1期。进一步的研究表明，化合物26f有效抑制了MDA-MB-231细胞的迁移。总体而言，这些数据支持化合物26f作为FAK靶向抗癌药物发现的先导化合物的进一步开发。