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El Akkaoui A, Koubachi J, Guillaumet G, El Kazzouli S. Synthesis and Functionalization of Imidazo[1,2‐
b
]Pyridazine by Means of Metal‐Catalyzed Cross‐Coupling Reactions. ChemistrySelect 2021. [DOI: 10.1002/slct.202101636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ahmed El Akkaoui
- Laboratory of Analytical and Molecular Chemistry (LCAM) Polydisciplinary Faculty of Safi Cadi Ayyad University, Sidi Bouzid, B.P. 4162 46000 Safi Morocco
| | - Jamal Koubachi
- Polydisciplinary Faculty of Taroudant Laboratory of Applied and Environmental Chemistry (LACAPE) Faculty of Sciences Ibn Zohr University of Agadir, B.P 271 83000 Taroudant Morocco
| | - Gérald Guillaumet
- Institute of Organic and Analytical Chemistry University of Orleans, UMR CNRS 7311, BP 6759 45067 Orleans Cedex 2 France
- Euromed Research Centre School of Engineering in Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fez Morocco
| | - Saïd El Kazzouli
- Euromed Research Centre School of Engineering in Biomedical and Biotechnology Euromed University of Fes (UEMF) Route de Meknès 30000 Fez Morocco
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Rostrup F, Falk-Petersen CB, Harpso E K, Buchleithner S, Conforti I, Jung S, Gloriam DE, Schirmeister T, Wellendorph P, Fro Lund B. Structural Determinants for the Mode of Action of Imidazopyridine DS2 at δ-Containing γ-Aminobutyric Acid Type A Receptors. J Med Chem 2021; 64:4730-4743. [PMID: 33847501 DOI: 10.1021/acs.jmedchem.0c02163] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Despite the therapeutic relevance of δ-containing γ-aminobutyric acid type A receptors (GABAARs) and the need for δ-selective compounds, the structural determinants for the mode and molecular site of action of δ-selective positive allosteric modulator imidazo[1,2-a]pyridine DS2 remain elusive. To guide the quest for insight, we synthesized a series of DS2 analogues guided by a structural receptor model. Using a fluorescence-based fluorometric imaging plate reader membrane potential assay, we found that the δ-selectivity and the pharmacological profile are severely affected by substituents in the 5-position of the imidazopyridine core scaffold. Interestingly, the 5-methyl, 5-bromo, and 5-chloro DS2 analogues, 30, 35, and 36, were shown to be superior to DS2 at α4β1δ as mid-high nanomolar potency δ-selective allosteric modulators, displaying 6-16 times higher potency than DS2. Of these, 30 also displayed at least 60-fold selectivity for α4β1δ over α4β1γ2 receptor subtypes representing a potential tool for the selective characterization of δ-containing GABAARs in general.
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Affiliation(s)
- Frederik Rostrup
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Christina B Falk-Petersen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Kasper Harpso E
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Stine Buchleithner
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Irene Conforti
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Sascha Jung
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University Mainz, Mainz D-55128, Germany
| | - David E Gloriam
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Tanja Schirmeister
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg University Mainz, Mainz D-55128, Germany
| | - Petrine Wellendorph
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Bente Fro Lund
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
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Asghariganjeh MR, Mohammadi AA, Tahanpesar E, Rayatzadeh A, Makarem S. Electro-organic synthesis of tetrahydroimidazo[1,2-a]pyridin-5(1H)-one via a multicomponent reaction. Mol Divers 2020; 25:509-516. [PMID: 31919737 DOI: 10.1007/s11030-019-10029-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 12/23/2019] [Indexed: 11/24/2022]
Abstract
Electro-synthesis through a one-pot three-component condensation of corresponding aldehydes, Meldrum's acid, and 2-(nitromethylene)imidazolidine resulted in a series of novel tetrahydroimidazo[1,2-a]pyridine-5(1H)-one derivatives containing an electronegative pharmacophore (=CNO2). The process was carried out in propanol medium with sodium bromide presented as electrolyte, inside an undivided cell with good to excellent yields. As a powerful entry into fused polycyclic structures related to bioactive heterocycles, this green protocol shows great potential.
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Affiliation(s)
- Mohammad Reza Asghariganjeh
- Department of Chemistry, Khuzestan Science and Research Branch, Islamic Azad University, Ahvaz, Iran.,Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
| | - Ali Asghar Mohammadi
- Chemistry and Chemical Engineering Research Center of Iran (CCERCI), 14335-186, Tehran, Iran.
| | - Elham Tahanpesar
- Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
| | - Ayeh Rayatzadeh
- Department of Chemistry, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
| | - Somayeh Makarem
- Department of Chemistry, Karaj Branch, Islamic Azad University, Karaj, Iran
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