2-(2-(4-Benzoylpiperazin-1-yl)ethyl)isoindoline-1,3-dione derivatives: Synthesis, docking and acetylcholinesterase inhibitory evaluation as anti-alzheimer agents

Document Type : Original Article

Authors

1 Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran

2 Department of Pharmacology, Toxicology and Medical Services, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran

3 Students Research Committee, Kermanshah University of Medical Sciences, Kermanshah, Iran

4 Department of Medicinal Chemistry, Faculty of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah, Iran

5 Neurobiomedical Research Center, Yazd Shahid Sadoughi University of Medical Sciences, Yazd, Iran

Abstract

Objective(s): Alzheimer’s disease (AD) as progressive cognitive decline and the most common form of dementia is due to degeneration of the cholinergic neurons in the brain. Therefore, administration of the acetylcholinesterase (AChE) inhibitors such as donepezil is the first choice for treatment of the AD. In the present study, we focused on the synthesis and anti-cholinesterase evaluation of new donepezil like analogs.
Materials and Methods: A new series of phthalimide derivatives (compounds 4a-4j) were synthesized via Gabriel protocol and subsequently amidation reaction was performed using various benzoic acid derivatives. Then, the corresponding anti-acetylcholinesterase activity of the prepared derivatives (4a-4j) was assessed by utilization of the Ellman's test and obtained results were compared to donepezil. Besides, docking study was also carried out to explore the likely in silico binding interactions. 
Results: According to the obtained results, electron withdrawing groups (Cl, F) at position 3 and an electron donating group (methoxy) at position 4 of the phenyl ring enhanced the acetylcholinesterase inhibitory activity. Compound 4e (m-Fluoro, IC50 = 7.1 nM) and 4i (p-Methoxy, IC50 = 20.3 nM) were the most active compounds in this series and exerted superior potency than donepezil (410 nM). Moreover, a similar binding mode was observed in silico for all ligands in superimposition state with donepezil into the active site of acetylcholinesterase.
Conclusion: Studied compounds could be potential leads for discovery of novel anti-Alzheimer agents in the future.

Keywords

References

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Iranian Journal of Basic Medical Sciences
Volume 20, Issue 1
January 2017
Pages 59-66

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