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Ujan R, Channar PA, Bahadur A, Abbas Q, Shah M, Rashid S, Iqbal S, Saeed A, Abd-Rabboh HS, Raza H, Hassan M, Siyal AN, Mahesar PA, Lal B, Channar KA, Khan BA, Nawaz M, Rajoka MSR, Kim JM. Synthesis, kinetics and biological assay of some novel aryl bis-thioureas: A potential drug candidates for Alzheimer's disease. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.131136] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mandigma MJP, Domański M, Barham JP. C-Alkylation of alkali metal carbanions with olefins. Org Biomol Chem 2020; 18:7697-7723. [PMID: 32785363 DOI: 10.1039/d0ob01180k] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
C-Alkylations of alkali metal carbanions with olefins, first reported five decades ago, is a class of reaction undergoing a resurgence in organic synthesis in recent years. As opposed to expectations from classical chemistry and transition metal-catalysis, here olefins behave as closed-shell electrophiles. Reactions range from highly reactive alkyllithiums giving rise to anionic polymerization, to moderately reactive alkylpotassium or alkylsodium compounds that give rise to defined, controlled and bimolecular chemistry. This review presents a brief historical overview on C-alkylation of alkali metal carbanions with olefins (typically mediated by KOtBu and KHMDS), highlights contemporary applications and features developing mechanistic understanding, thereby serving as a platform for future studies and the widespread use of this class of reaction in organic synthesis.
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Affiliation(s)
- Mark John P Mandigma
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040 Regensburg, Germany.
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Kuca K, Karasova JZ, Soukup O, Kassa J, Novotna E, Sepsova V, Horova A, Pejchal J, Hrabinova M, Vodakova E, Jun D, Nepovimova E, Valis M, Musilek K. Development of small bisquaternary cholinesterase inhibitors as drugs for pre-treatment of nerve agent poisonings. DRUG DESIGN DEVELOPMENT AND THERAPY 2018; 12:505-512. [PMID: 29563775 PMCID: PMC5849933 DOI: 10.2147/dddt.s133038] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Background Intoxication by nerve agents could be prevented by using small acetylcholinesterase inhibitors (eg, pyridostigmine) for potentially exposed personnel. However, the serious side effects of currently used drugs led to research of novel potent molecules for prophylaxis of organophosphorus intoxication. Methods The molecular design, molecular docking, chemical synthesis, in vitro methods (enzyme inhibition, cytotoxicity, and nicotinic receptors modulation), and in vivo methods (acute toxicity and prophylactic effect) were used to study bispyridinium, bisquinolinium, bisisoquinolinium, and pyridinium-quinolinium/isoquinolinium molecules presented in this study. Results The studied molecules showed non-competitive inhibitory ability towards human acetylcholinesterase in vitro that was further confirmed by molecular modelling studies. Several compounds were selected for further studies. First, their cytotoxicity, nicotinic receptors modulation, and acute toxicity (lethal dose for 50% of laboratory animals [LD50]; mice and rats) were tested to evaluate their safety with promising results. Furthermore, their blood levels were measured to select the appropriate time for prophylactic administration. Finally, the protective ratio of selected compounds against soman-induced toxicity was determined when selected compounds were found similarly potent or only slightly better to standard pyridostigmine. Conclusion The presented small bisquaternary molecules did not show overall benefit in prophylaxis of soman-induced in vivo toxicity.
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Affiliation(s)
- Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove.,Biomedical Research Center, University Hospital Hradec Kralove
| | - Jana Zdarova Karasova
- Biomedical Research Center, University Hospital Hradec Kralove.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence
| | - Ondrej Soukup
- Biomedical Research Center, University Hospital Hradec Kralove
| | - Jiri Kassa
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence
| | - Eva Novotna
- Biomedical Research Center, University Hospital Hradec Kralove
| | - Vendula Sepsova
- Biomedical Research Center, University Hospital Hradec Kralove.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence
| | - Anna Horova
- Biomedical Research Center, University Hospital Hradec Kralove
| | - Jaroslav Pejchal
- Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence
| | - Martina Hrabinova
- Biomedical Research Center, University Hospital Hradec Kralove.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence
| | - Eva Vodakova
- Biomedical Research Center, University Hospital Hradec Kralove
| | - Daniel Jun
- Biomedical Research Center, University Hospital Hradec Kralove.,Department of Toxicology and Military Pharmacy, Faculty of Military Health Sciences, University of Defence
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove.,Biomedical Research Center, University Hospital Hradec Kralove
| | - Martin Valis
- Department of Neurology, University Hospital Hradec Kralove, Hradec Kralove, Czech Republic
| | - Kamil Musilek
- Department of Chemistry, Faculty of Science, University of Hradec Kralove.,Biomedical Research Center, University Hospital Hradec Kralove
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Hrabcova V, Korabecny J, Manyova B, Matouskova L, Kucera T, Dolezal R, Musilek K, Gorecki L, Nepovimova E, Kuca K, Jun D. Bis-isoquinolinium and bis-pyridinium acetylcholinesterase inhibitors: in vitro screening of probes for novel selective insecticides. RSC Adv 2017. [DOI: 10.1039/c7ra05838a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Library screening of pyridinium-based compounds, acting as acetylcholinesterase inhibitors, for their potential insecticidal efficacy.
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Karasova JZ, Hroch M, Musilek K, Kuca K. Small Quaternary Inhibitors K298 and K524: Cholinesterases Inhibition, Absorption, Brain Distribution, and Toxicity. Neurotox Res 2015; 29:267-74. [DOI: 10.1007/s12640-015-9582-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 11/06/2015] [Accepted: 11/24/2015] [Indexed: 10/22/2022]
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Saeed A, Zaib S, Ashraf S, Iftikhar J, Muddassar M, Zhang KYJ, Iqbal J. Synthesis, cholinesterase inhibition and molecular modelling studies of coumarin linked thiourea derivatives. Bioorg Chem 2015; 63:58-63. [PMID: 26440714 DOI: 10.1016/j.bioorg.2015.09.009] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2015] [Revised: 09/14/2015] [Accepted: 09/28/2015] [Indexed: 12/27/2022]
Abstract
Alzheimer's disease is among the most widespread neurodegenerative disorder. Cholinesterases (ChEs) play an indispensable role in the control of cholinergic transmission and thus the acetylcholine level in the brain is enhanced by inhibition of ChEs. Coumarin linked thiourea derivatives were designed, synthesized and evaluated biologically in order to determine their inhibitory activity against acetylcholinesterases (AChE) and butyrylcholinesterases (BChE). The synthesized derivatives of coumarin linked thiourea compounds showed potential inhibitory activity against AChE and BChE. Among all the synthesized compounds, 1-(2-Oxo-2H-chromene-3-carbonyl)-3-(3-chlorophenyl)thiourea (2e) was the most potent inhibitor against AChE with an IC50 value of 0.04±0.01μM, while 1-(2-Oxo-2H-chromene-3-carbonyl)-3-(2-methoxyphenyl)thiourea (2b) showed the most potent inhibitory activity with an IC50 value of 0.06±0.02μM against BChE. Molecular docking simulations were performed using the homology models of both cholinesterases in order to explore the probable binding modes of inhibitors. Results showed that the novel synthesized coumarin linked thiourea derivatives are potential candidates to develop for potent and efficacious acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitors.
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Affiliation(s)
- Aamer Saeed
- Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan
| | - Sumera Zaib
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Saba Ashraf
- Department of Chemistry, Quaid-I-Azam University, Islamabad, Pakistan
| | - Javeria Iftikhar
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan
| | - Muhammad Muddassar
- Structural Bioinformatics Team, Division of Structural and Synthetic Biology, Center for Life Science Technologies, RIKEN, 1-7-22 Suehiro, Yokohama, Kanagawa 230-0045, Japan; Department of Biosciences, COMSATS Institute of Information Technology, Park Road, Islamabad, Pakistan
| | - Kam Y J Zhang
- Structural Bioinformatics Team, Division of Structural and Synthetic Biology, Center for Life Science Technologies, RIKEN, 1-7-22 Suehiro, Yokohama, Kanagawa 230-0045, Japan
| | - Jamshed Iqbal
- Centre for Advanced Drug Research, COMSATS Institute of Information Technology, Abbottabad 22060, Pakistan.
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de Aquino RAN, Modolo LV, Alves RB, de Fátima Â. Synthesis, kinetic studies and molecular modeling of novel tacrine dimers as cholinesterase inhibitors. Org Biomol Chem 2013; 11:8395-409. [DOI: 10.1039/c3ob41762j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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Musilek K, Roder J, Komloova M, Holas O, Hrabinova M, Pohanka M, Dohnal V, Opletalova V, Kuca K, Jung YS. Preparation, in vitro screening and molecular modelling of symmetrical 4-tert-butylpyridinium cholinesterase inhibitors--analogues of SAD-128. Bioorg Med Chem Lett 2010; 21:150-4. [PMID: 21144749 DOI: 10.1016/j.bmcl.2010.11.051] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 11/06/2010] [Accepted: 11/09/2010] [Indexed: 10/18/2022]
Abstract
Carbamate inhibitors (e.g., pyridostimine bromide) are used as a pre-exposure treatment for the prevention of organophosphorus poisoning. They work by blocking acetylcholinesterase's (AChE) native function and thus protect AChE against irreversible inhibition by organophosphorus compounds. However, carbamate inhibitors are known for many undesirable side-effects related to the carbamylation of AChE. In this Letter, 19 analogues of SAD-128 were prepared and evaluated as cholinesterase inhibitors. The screening results showed promising inhibitory ability of four compounds better to used standards (pralidoxime, obidoxime, BW284c51, ethopropazine, SAD-128). Four most promising compounds were selected for further molecular docking studies. The SAR was stated from obtained data. The former receptor studies were reported and discussed. The further in vivo studies were recommended in the view of OP pre-exposure treatment.
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Affiliation(s)
- Kamil Musilek
- University of Defence, Faculty of Military Health Sciences, Department of Toxicology, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic
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