2D & 3D-QSAR Study on Novel Piperidine and Piperazine Derivatives as Acetylcholinesterase Enzyme Inhibitors

Introduction: Acetylcholinesterase enzyme (AChE) is the main target in Alzheimer's disease therapy and designing of novel AChE inhibitors is a great deal of attention. Methods: In this study, 2D-QSAR and 3D-QSAR models were generated using stepwise multiple linear regressions (SW-MLR) and comparative molecular field analysis (CoMFA) respectively. Results: It was found that CoMFA model with r(2) of 0.947 for the training set and r(2) of 0.816 for the test set is more favorable than model which is established by SW-MLR method with r(2) = 0.825 and r2pred = 0.778 in 2D-QSAR. Conclusion: In addition, obtaining models were validated by cross validation with cut off values of q(2) > 0.5 and r(2) pred > 0.6.