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N-Cyclohexylimidazo[1,2-A]Pyridine Derivatives As Multi-Target-Directed Ligands for Treatment of Alzheimer's Disease Publisher Pubmed



Haghighijoo Z1 ; Akrami S2 ; Saeedi M3, 4 ; Zonouzi A2 ; Iraji A1 ; Larijani B5 ; Fakherzadeh H6 ; Sharifi F6 ; Arzaghi SM6 ; Mahdavi M5 ; Edraki N1
Authors

Source: Bioorganic Chemistry Published:2020


Abstract

Alzheimer's disease (AD) is the most common form of dementia. While drugs that target several pathways underlying AD have been proposed, effective treatments remain to be discovered. BACE1, an enzyme associated with AD progression, is a promising target for developing anti-Alzheimer drugs. To find novel multifunctional anti-Alzheimer agents, we designed and synthesized a series of new substituted benzyl-1H-1,2,3-triazol-4-yl-N-cyclohexylimidazo[1,2-a]pyridin-3-amine. The in vitro screening results revealed that most of the compounds exhibited moderate to potent BACE1 and BuChE inhibitory and antioxidant activities. Compounds 7f and 7g, bearing dichloro (2,3-Cl2 and 3,4-Cl2) moieties on the benzyl pendant were selected as the most active compounds in our BACE1 inhibitory assay with respective IC50 values of about 12 and 8.9 μM. In addition, compounds 7g and 7h (4-bromo derivative) showed the highest BuChE inhibitory activity with IC50 of 3.2 and 2.5 µM, respectively. Compound 7g also possessed antioxidant activity with an IC50 value of 10.2 μM and metal chelation potential. Moreover, docking studies were performed to investigate the possible mechanism of inhibition. Taken together, we demonstrate that N-cyclohexylimidazo[1,2-a]pyridine containing triazole motif derivatives deserve further investigation for anti-Alzheimer drug development. © 2020
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