Cholinesterase inhibitor plays an important role in the treatment of patients with Alzheimer's disease (AD). Herein, we report the medicinal chemistry efforts leading to a new series of 1,3-dimethylbenzimidazolinone derivatives. Among the synthesised compounds, 15b and 15j showed submicromolar IC50 values (15b, eeAChE IC50 = 0.39 ± 0.11 µM; 15j, eqBChE IC50 = 0.16 ± 0.04 µM) towards acetylcholinesterase (AChE) and butyrylcholinesterase (BChE). Kinetic and molecular modelling studies revealed that 15b and 15j act in a competitive manner. 15b and 15j showed neuroprotective effect against H2O2-induced oxidative damage on PC12 cells. This effect was further supported by their antioxidant activity determined in a DPPH assay in vitro. Morris water maze test confirmed the memory amelioration effect of the two compounds in a scopolamine-induced mouse model. Moreover, the hepatotoxicity of 15b and 15j was lower than tacrine. In summary, these data suggest 15b and 15j are promising multifunctional agents against AD.

中文翻译：

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设计，合成，体外和体内评估苄基哌啶连接的1，3-二甲基苯并咪唑啉酮类化合物作为抗阿尔茨海默氏病的胆碱酯酶抑制剂。

胆碱酯酶抑制剂在阿尔茨海默氏病（AD）患者的治疗中起着重要作用。在此，我们报告了导致一系列新的1,3-二甲基苯并咪唑啉酮衍生物的药物化学作用。在合成的化合物中，15b和15j对乙酰胆碱酯酶（AChE）和丁酰胆碱酯酶（BChE）表现出亚微摩尔IC50值（15b，eeAChE IC50 = 0.39±0.11 µM； 15j，eqBChE IC50 = 0.16±0.04 µM）。动力学和分子建模研究表明15b和15j以竞争的方式发挥作用。图15b和15j显示了对H 2 O 2诱导的对PC12细胞的氧化损伤的神经保护作用。在体外DPPH分析中确定的抗氧化活性进一步支持了该效果。莫里斯水迷宫测试证实了两种化合物在东induced碱诱导的小鼠模型中的记忆改善作用。此外，15b和15j的肝毒性低于他克林。总之，这些数据表明15b和15j是有希望的抗AD多功能剂。