A series of benzimidazole-based Schiff base derivatives (1–18) were synthesized and structurally elucidated through 1H NMR, 13C NMR and HREI-MS analysis. Subsequently, these synthetic derivatives were subjected to evaluation for their inhibitory capabilities against acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE). All these derivatives showed significant inhibition against AChE with an IC50 value in the range of 123.9 ± 10.20 to 342.60 ± 10.60 µM and BuChE in the range of 131.30 ± 9.70 to 375.80 ± 12.80 µM in comparison with standard Donepezil, which has IC50 values of 243.76 ± 5.70 µM (AChE) and 276.60 ± 6.50 µM (BuChE), respectively. Compounds 3, 5 and 9 exhibited potent inhibition against both AChE and BuChE. Molecular docking studies were used to validate and establish the structure–activity relationship of the synthesized derivatives.
通过 1H NMR、13C NMR 和 HREI-MS 分析,合成了一系列基于苯并咪唑的席夫碱衍生物(1-18)并阐明了其结构。随后,对这些合成衍生物对乙酰胆碱酯酶(AChE)和丁酰胆碱酯酶(BuChE)的抑制能力进行了评估。所有这些衍生物对乙酰胆碱酯酶(AChE)和丁酰胆碱酯酶(BuChE)都有明显的抑制作用,其 IC50 值在 123.9 ± 10.20 至 342.60 ± 10.60 µM 之间,对 BuChE 的抑制作用在 131.30 ± 9.70 至 375.80 ± 12.80 µM 之间,而标准物质多奈哌齐的 IC50 值分别为 243.76 ± 5.70 µM(AChE)和 276.60 ± 6.50 µM(BuChE)。化合物 3、5 和 9 对 AChE 和 BuChE 都有很强的抑制作用。分子对接研究用于验证和建立合成衍生物的结构-活性关系。