Guan_2023_Chem.Biodivers__e202301271

According to the fusion technique create effective multi-target-directed ligands, in this study, we designed and synthesized a series of benzo[d]thiazol-2-yl)-3-(pyrrolidin-1-yl) or 3-(morpholino-1-yl)propanamide derivatives, and evaluated their inhibitory potency against MAOs, AChE, BuChE by in vitro enzyme effect assays. Based on activity results, we found that derivatives N-(5-methylbenzo[d]thiazol-2-yl)-3-(pyrrolidin-1-yl)propanamide (2c) and N-(6-bromo- benzo[d]thiazol-2-yl)-3-(pyrrolidin-1-yl)propanamide (2h) showed good inhibitory potency against BuChE with IC50 values of 15.12 microM and 12.33 microM, respectively. Besides, 2c and 2h also exhibited selective MAO-B inhibitory effects with inhibition rates of 60.10 % and 66.30 % at 100 microM, respectively. In contrast, all designed derivatives were poor active against AChE and MAO-A at a concentration of 100 microM. The toxicity analysis in vitro by MTT and AO/EB fluorescence staining confirmed that 2c and 2h were nontoxic up to 100 microM. Molecular modeling studies showed that 2c and 2h could bind to the active site of BuChE. This research paves the way for further study aimed at designing MAO-B and BuChE inhibitors for the treatment of neurodegenerative disorders.