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Synthesis, Enzyme Inhibitory Potential and Molecular Docking Study of Different Heterocycles

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Medicinal Chemistry".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 2784

Special Issue Editor


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Guest Editor
Department of Chemistry, Hazara University, Mansehra 21300, Pakistan
Interests: medicinal chemistry; organic synthesis; organometallics; spectroscopic techniques

Special Issue Information

Dear Colleagues,

Enzymes are essential biomolecules that exist in all living organism and are relevant to the catabolic and anabolic pathways. However, it is well known that altering the activity of certain enzymes may be involved in the onset of specific human diseases. Enzyme activity inhibition a promising approach for treating certain human diseases. For example, thrombin plays a vital role in the thrombosis process, and its inhibitors can be used to treat cardiovascular diseases. Glycosidase inhibitors have the potential to be used as drugs to treat hereditary lysosomal storage diereses, cancer, viral infection, and diabetes. Moreover, trypsin inhibitors can be used for the treatment of rheumatoid arthritis, hypertension, diabetes, and severe acute pancreatitis. The main approach to gout treatment is the inhibition of xanthine oxidase activity. Tyrosinase inhibitors can be used as potential drugs for the treatment of skin tumors and melanoma.

Heterocycles are common scaffolds, the vast majority of which are marketed as drugs and drug candidates. Heterocycles are the key to biological activity in several small drug molecules due to their capacity to form hydrogen bonds, change polarity, and modulate lipophilicity at particular sites in the host or pathogen, with the overall effect of inhibiting the biological processes that result in the programed progression of diseases. These subunits have the ability to enhance the physiochemical, toxicological, pharmacokinetic, and pharmacological properties of compounds, enhancing their effect in easing a variety of afflictions. New developments in synthetic techniques that result in rapid access to a wide range of heterocyclic compounds are of critical importance for medicinal chemists to quickly synthesize a large number of desired compounds to find novel and effective pharmaceuticals among heterocyclic compounds.

This Special Issue titled " Synthesis, enzyme inhibitory potential and molecular docking study of different heterocycles" will include research articles focusing on those enzymes whose overexpression is considered harmful to human health. The research articles will report both the identification of new enzymatic inhibitors that are potentially useful as well as drugs and the characterization of the mechanisms of action of new and already known enzyme inhibitors at in vitro or in vivo level.

Dr. Fazal Rahim
Guest Editor

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Keywords

  • synthesis
  • heterocycles
  • enzymes
  • molecular docking

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Published Papers (1 paper)

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Research

26 pages, 8192 KiB  
Article
Ultrasound-Assisted Synthesis of Piperidinyl-Quinoline Acylhydrazones as New Anti-Alzheimer’s Agents: Assessment of Cholinesterase Inhibitory Profile, Molecular Docking Analysis, and Drug-like Properties
by Rubina Munir, Sumera Zaib, Muhammad Zia-ur-Rehman, Nadia Hussain, Faryal Chaudhry, Muhammad Tayyab Younas, Fatima Tuz Zahra, Zainab Tajammul, Noman Javid, Ayed A. Dera, Hanan A. Ogaly and Imtiaz Khan
Molecules 2023, 28(5), 2131; https://doi.org/10.3390/molecules28052131 - 24 Feb 2023
Cited by 5 | Viewed by 2381
Abstract
Alzheimer’s disease (AD) is one of the progressive neurological disorders and the main cause of dementia all over the world. The multifactorial nature of Alzheimer’s disease is a reason for the lack of effective drugs as well as a basis for the development [...] Read more.
Alzheimer’s disease (AD) is one of the progressive neurological disorders and the main cause of dementia all over the world. The multifactorial nature of Alzheimer’s disease is a reason for the lack of effective drugs as well as a basis for the development of new structural leads. In addition, the appalling side effects such as nausea, vomiting, loss of appetite, muscle cramps, and headaches associated with the marketed treatment modalities and many failed clinical trials significantly limit the use of drugs and alarm for a detailed understanding of disease heterogeneity and the development of preventive and multifaceted remedial approach desperately. With this motivation, we herein report a diverse series of piperidinyl-quinoline acylhydrazone therapeutics as selective as well as potent inhibitors of cholinesterase enzymes. Ultrasound-assisted conjugation of 6/8-methyl-2-(piperidin-1-yl)quinoline-3-carbaldehydes (4a,b) and (un)substituted aromatic acid hydrazides (7a-m) provided facile access to target compounds (8a-m and 9a-j) in 4–6 min in excellent yields. The structures were fully established using spectroscopic techniques such as FTIR, 1H- and 13C NMR, and purity was estimated using elemental analysis. The synthesized compounds were investigated for their cholinesterase inhibitory potential. In vitro enzymatic studies revealed potent and selective inhibitors of AChE and BuChE. Compound 8c showed remarkable results and emerged as a lead candidate for the inhibition of AChE with an IC50 value of 5.3 ± 0.51 µM. The inhibitory strength of the optimal compound was 3-fold higher compared to neostigmine (IC50 = 16.3 ± 1.12 µM). Compound 8g exhibited the highest potency and inhibited the BuChE selectively with an IC50 value of 1.31 ± 0.05 µM. Several compounds, such as 8a-c, also displayed dual inhibitory strength, and acquired data were superior to the standard drugs. In vitro results were further supported by molecular docking analysis, where potent compounds revealed various important interactions with the key amino acid residues in the active site of both enzymes. Molecular dynamics simulation data, as well as physicochemical properties of the lead compounds, supported the identified class of hybrid compounds as a promising avenue for the discovery and development of new molecules for multifactorial diseases, such as Alzheimer’s disease (AD). Full article
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