inhibitors can effectively inhibit the proliferation of tumor cells. By taking BI‐2536 (PLK1 and BRD4 inhibitor) as the lead compound, sixteen novel BRD4 inhibitors with the 4,4‐difluoro‐1‐methyl‐N,6‐diphenyl‐5,6‐dihydro‐4H‐pyrimido[4,5‐b] [1,2,4] triazolo[4,3‐d] [1,4] diazepine‐8‐amine structure were designed and synthetized. Among the target compounds, compound 15h exhibited outstanding inhibition for
含
溴结构域蛋白4(BR
D4)在癌症中起着极其重要的生理作用,而BR
D4抑制剂可以有效抑制肿瘤细胞的增殖。以BI-2536(PLK1和BR
D4抑制剂)为先导化合物,开发了十六种新型BR
D4抑制剂,分别带有4,4-二
氟-
1-甲基-N,6
-二苯基-5,6-二
氢-4 H-
嘧啶基[4]。 ,5- b ] [1,
2,4]三唑并[4,3- d ] [1,4]二
氮杂-8-胺结构被设计并合成。在目标化合物中,化合物15h在BR
D4-BD1抑制活性测定中表现出对BR
D4-BD1的出色抑制作用(IC 50值为0.42μM)。此外,细胞生长抑制试验证明化合物15h有效抑制MV4-11细胞的增殖(IC 50值为0.51μM )。此外,化合物15h可有效诱导MV4-11白血病细胞凋亡和G0 / G1周期阻滞,并以剂量依赖性方式下调c-Myc的表达。综上所述,最佳化合物15h有望成为进一步研究的临床治疗药物。