2-Aminomethylthieno[3,2- d ]pyrimidin-4(3 H )-ones bearing 3-methylpyrazole hinge binding moiety: Highly potent, selective, and time-dependent inhibitors of Cdc7 kinase
作者:Osamu Kurasawa、Misaki Homma、Yuya Oguro、Tohru Miyazaki、Kouji Mori、Noriko Uchiyama、Kenichi Iwai、Akihiro Ohashi、Hideto Hara、Sei Yoshida、Nobuo Cho
DOI:10.1016/j.bmc.2017.04.044
日期:2017.7
a serendipitously-identified Cdc7 inhibitor 2b with a 3-methylpyrazole resulted in a 4-fold increase in potency and acceptable kinase selectivity, leading to the identification of thieno[3,2-d]pyrimidin-4(3H)-one as an alternative scaffold. Structure-activity relationship (SAR) study revealed that incorporation of a substituted aminomethyl group into the 2-position improved kinase selectivity. Indeed
为了提高开发用于癌症治疗的新型Cdc7抑制剂的成功率,我们探索了一种新的化学型,该化学型可以符合以前构建的药效团模型。用3-甲基吡唑取代偶然鉴定出的Cdc7抑制剂2b的吡啶环,其效力和可接受的激酶选择性提高了4倍,从而导致了噻吩并[3,2- d ]嘧啶-4(3)的鉴定H)-一个作为替代支架。结构-活性关系(SAR)研究表明,将取代的氨基甲基基团并入2位可提高激酶的选择性。的确,吡咯烷基甲基衍生物10c是有效的Cdc7抑制剂(IC 50 = 0.70 nM)高选择性(Cdk2 / Cdc7≥14,000,ROCK1 / Cdc7 = 200)。应当注意,10c表现出显着的时间依赖性Cdc7抑制作用,具有缓慢的解离动力学,细胞药效(PD)效应和COLO205生长抑制作用。此外,通过使用Cdc7和Cdk2的蛋白质结构讨论了10c的高激酶选择性的分子基础。