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Escobar-Peso A, Martínez-Alonso E, Hadjipavlou-Litina D, Alcázar A, Marco-Contelles J. Synthesis, antioxidant and neuroprotective analysis of diversely functionalized α-aryl-N-alkyl nitrones as potential agents for ischemic stroke therapy. Eur J Med Chem 2024; 266:116133. [PMID: 38218126 DOI: 10.1016/j.ejmech.2024.116133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Revised: 01/05/2024] [Accepted: 01/06/2024] [Indexed: 01/15/2024]
Abstract
Herein, we report the synthesis, antioxidant and biological evaluation of 32 monosubstituted α-arylnitrones derived from α-phenyl-tert-butyl nitrone (PBN) in the search for neuroprotective compounds for ischemic stroke therapy, trying to elucidate the structural patterns responsible for their neuroprotective activity. Not surprisingly, the N-tert-butyl moiety plays beneficious role in comparison to other differently N-substituted nitrone groups. It seems that electron donor substituents at the ortho position and electron withdrawing substituents at the meta position of the aryl ring induce good neuroprotective activity. As a result, (Z)-N-tert-butyl-1-(2-hydroxyphenyl)methanimine oxide (21a) and (Z)-N-tert-butyl-1-(2-(prop-2-yn-1-yloxy)phenyl)methanimine oxide (24a) showed a significant increase in neuronal viability in an experimental ischemia model in primary neuronal cultures, and induced neuroprotection and improved neurodeficit score in an in vivo model of transient cerebral ischemia. These results showed that nitrones 21a and 24a are new effective small and readily available antioxidants, and suitable candidates for further structure optimization in the search for new phenyl-derived nitrones for the treatment of ischemic stroke and related diseases.
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Affiliation(s)
- Alejandro Escobar-Peso
- Department of Research, Ramón y Cajal University Hospital, IRYCIS, 28034, Madrid, Spain; Laboratory of Medicinal Chemistry, Institute of General Organic Chemistry (CSIC), 28006, Madrid, Spain.
| | - Emma Martínez-Alonso
- Department of Research, Ramón y Cajal University Hospital, IRYCIS, 28034, Madrid, Spain
| | - Dimitra Hadjipavlou-Litina
- Department of Pharmaceutical Chemistry, School of Pharmacy, Aristotle University of Thessaloniki, 54124, Thessaloniki, Greece
| | - Alberto Alcázar
- Department of Research, Ramón y Cajal University Hospital, IRYCIS, 28034, Madrid, Spain.
| | - José Marco-Contelles
- Laboratory of Medicinal Chemistry, Institute of General Organic Chemistry (CSIC), 28006, Madrid, Spain; Centre for Biomedical Network Research on Rare Diseases (CIBERER), CIBER, ISCIII, Madrid, Spain.
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Deletraz A, Zéamari K, Hua K, Combes M, Villamena FA, Tuccio B, Callizot N, Durand G. Substituted α-Phenyl and α-Naphthlyl- N- tert-butyl Nitrones: Synthesis, Spin-Trapping, and Neuroprotection Evaluation. J Org Chem 2020; 85:6073-6085. [PMID: 32267700 DOI: 10.1021/acs.joc.0c00563] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
New derivatives of α-phenyl-N-tert-butyl nitrone (PBN) bearing a hydroxyl, an acetate, or an acetamide substituent on the N-tert-butyl moiety and para-substituted phenyl or naphthlyl moieties were synthesized. Their ability to trap hydroxymethyl radical was evaluated by electron paramagnetic resonance spectroscopy. The presence of two electron-withdrawing substituents on both sides of the nitronyl function improves the spin-trapping properties, with 4-HOOC-PBN-CH2OAc and 4-HOOC-PBN-CH2NHAc being ∼4× more reactive than PBN. The electrochemical properties of the derivatives were further investigated by cyclic voltammetry and showed that the redox potentials of the nitrones are largely influenced by the nature of the substituents both on the aromatic ring and on the N-tert-butyl function. The acetamide derivatives PBN-CH2NHAc, 4-AcNHCH2-PBN-CH2NHAc, and 4-MeO-PBN-CH2NHAc were the easiest to oxidize. A computational approach was used to rationalize the effect of functionalization on the free energies of nitrone reactivity with hydroxymethyl radical as well as on the electron affinity and ionization potential. Finally, the neuroprotection of the derivatives was evaluated in an in vitro model of cellular injury on cortical neurons. Five derivatives showed good protection at very low concentrations (0.1-10 μM), with PBN-CH2NHAc and 4-HOOC-PBN being the two most promising agents.
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Affiliation(s)
- Anaïs Deletraz
- Institut des Biomolécules Max Mousseron, UMR 5247 CNRS-Université Montpellier-ENSCM & Avignon Université, Equipe Chimie Bioorganique et Systèmes Amphiphiles, 301 rue Baruch de Spinoza, BP 21239, Avignon 84916 Cedex 9, France
| | - Kamal Zéamari
- Institut des Biomolécules Max Mousseron, UMR 5247 CNRS-Université Montpellier-ENSCM & Avignon Université, Equipe Chimie Bioorganique et Systèmes Amphiphiles, 301 rue Baruch de Spinoza, BP 21239, Avignon 84916 Cedex 9, France
| | - Kangyu Hua
- The Ohio State University, Department of Biological Chemistry and Pharmacology, 473 West 12th Avenue, Columbus, Ohio 43210, United States
| | - Maud Combes
- Neuro-Sys, 410 Chemin Départemental 60, 13120 Gardanne, France
| | - Frederick A Villamena
- The Ohio State University, Department of Biological Chemistry and Pharmacology, 473 West 12th Avenue, Columbus, Ohio 43210, United States
| | - Béatrice Tuccio
- Aix-Marseille Université, CNRS, ICR UMR 7273, Avenue Escadrille Normandie Niemen, 13397 Marseille Cedex 20, France
| | - Noelle Callizot
- Neuro-Sys, 410 Chemin Départemental 60, 13120 Gardanne, France
| | - Grégory Durand
- Institut des Biomolécules Max Mousseron, UMR 5247 CNRS-Université Montpellier-ENSCM & Avignon Université, Equipe Chimie Bioorganique et Systèmes Amphiphiles, 301 rue Baruch de Spinoza, BP 21239, Avignon 84916 Cedex 9, France
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Deletraz A, Zéamari K, Di Meo F, Fabre PL, Reybier K, Trouillas P, Tuccio B, Durand G. Reactivities of MeO-substituted PBN-type nitrones. NEW J CHEM 2019. [DOI: 10.1039/c9nj03805a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
MeO-derivatives of phenyl nitrones were synthesized and their electrochemical and spin-trapping properties were studied.
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Affiliation(s)
- Anaïs Deletraz
- Institut des Biomolécules Max Mousseron
- UMR 5247 CNRS-Université Montpellier-ENSCM & Avignon Université
- Equipe Chimie Bioorganique et Systèmes Amphiphiles
- Avignon 84916 Cedex 9
- France
| | - Kamal Zéamari
- Institut des Biomolécules Max Mousseron
- UMR 5247 CNRS-Université Montpellier-ENSCM & Avignon Université
- Equipe Chimie Bioorganique et Systèmes Amphiphiles
- Avignon 84916 Cedex 9
- France
| | - Florent Di Meo
- INSERM U1248 IPPRITT
- Université de Limoges
- Faculté de Médecine et Pharmacie
- France
| | | | | | - Patrick Trouillas
- INSERM U1248 IPPRITT
- Université de Limoges
- Faculté de Médecine et Pharmacie
- France
- Regional Centre of Advanced Technologies and Materials
| | - Béatrice Tuccio
- Aix-Marseille Université
- CNRS
- ICR UMR 7273
- 13397 Marseille Cedex 20
- France
| | - Grégory Durand
- Institut des Biomolécules Max Mousseron
- UMR 5247 CNRS-Université Montpellier-ENSCM & Avignon Université
- Equipe Chimie Bioorganique et Systèmes Amphiphiles
- Avignon 84916 Cedex 9
- France
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Xuan J, Cheng X, Cao X. [3+3] Cycloaddition ofin SituFormed Azaoxyallyl Cations with Nitrones: Synthesis of 1,2,4-Oxadiazinan-5-one Derivatives. ChemistrySelect 2017. [DOI: 10.1002/slct.201700826] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jun Xuan
- Department of Chemistry; Anhui University, Hefei; Anhui 230601 People's Republic of China
| | - Xiao Cheng
- Department of Chemistry; Anhui University, Hefei; Anhui 230601 People's Republic of China
| | - Xia Cao
- Department of Chemistry; Anhui University, Hefei; Anhui 230601 People's Republic of China
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Zhao HW, Liu YY, Zhao YD, Pang HL, Chen XQ, Song XQ, Tian T, Li B, Yang Z, Du J, Feng NN. [3 + 2] Cycloaddition of Oxazol-5-(4H)-ones with Nitrones for Diastereoselective Synthesis of Isoxazolidin-5-ones. Org Lett 2016; 19:26-29. [DOI: 10.1021/acs.orglett.6b03206] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hong-Wu Zhao
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Yue-Yang Liu
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Yu-Di Zhao
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Hai-Liang Pang
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Xiao-Qin Chen
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Xiu-Qing Song
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Ting Tian
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Bo Li
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Zhao Yang
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Juan Du
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
| | - Ning-Ning Feng
- College of Life Science and Bio-engineering, Beijing University of Technology, No. 100 Pingleyuan, Chaoyang District, Beijing 100124, China
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Czaban-Jóźwiak J, Loska R, Mąkosza M. Synthesis of α-Fluoro-α-nitroarylacetates via Vicarious Nucleophilic Substitution of Hydrogen. J Org Chem 2016; 81:11751-11757. [PMID: 27783510 DOI: 10.1021/acs.joc.6b02219] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Readily available ethyl chlorofluoroacetate, when treated with a strong base, forms an α-chloro-α-fluorocarbanion that adds to nitroarenes at a position ortho or para to the nitro group with formation of anionic σH adducts. Subsequent base-induced β-elimination of HCl proceeds selectively to give nitrobenzylic α-fluorocarbanions and, upon protonation, ethyl α-fluoro-α-nitroarylacetates.
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Affiliation(s)
- Justyna Czaban-Jóźwiak
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Rafał Loska
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
| | - Mieczysław Mąkosza
- Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
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Roca-López D, Polo V, Tejero T, Merino P. Mechanism Switch in Mannich-Type Reactions: ELF and NCI Topological Analyses of the Reaction between Nitrones and Lithium Enolates. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500447] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Sans V, Porwol L, Dragone V, Cronin L. A self optimizing synthetic organic reactor system using real-time in-line NMR spectroscopy. Chem Sci 2015; 6:1258-1264. [PMID: 29560211 PMCID: PMC5811122 DOI: 10.1039/c4sc03075c] [Citation(s) in RCA: 164] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Accepted: 11/14/2014] [Indexed: 12/21/2022] Open
Abstract
A configurable platform for synthetic chemistry incorporating an in-line benchtop NMR that is capable of monitoring and controlling organic reactions in real-time is presented. The platform is controlled via a modular LabView software control system for the hardware, NMR, data analysis and feedback optimization. Using this platform we report the real-time advanced structural characterization of reaction mixtures, including 19F, 13C, DEPT, 2D NMR spectroscopy (COSY, HSQC and 19F-COSY) for the first time. Finally, the potential of this technique is demonstrated through the optimization of a catalytic organic reaction in real-time, showing its applicability to self-optimizing systems using criteria such as stereoselectivity, multi-nuclear measurements or 2D correlations.
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Affiliation(s)
- Victor Sans
- WestCHEM , School of Chemistry , The University of Glasgow , Glasgow G12 8QQ , UK . ; http://www.croninlab.com
| | - Luzian Porwol
- WestCHEM , School of Chemistry , The University of Glasgow , Glasgow G12 8QQ , UK . ; http://www.croninlab.com
| | - Vincenza Dragone
- WestCHEM , School of Chemistry , The University of Glasgow , Glasgow G12 8QQ , UK . ; http://www.croninlab.com
| | - Leroy Cronin
- WestCHEM , School of Chemistry , The University of Glasgow , Glasgow G12 8QQ , UK . ; http://www.croninlab.com
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Prakash GKS, Wang F, Rahm M, Zhang Z, Ni C, Shen J, Olah GA. The trifluoromethyl group as a conformational stabilizer and probe: conformational analysis of cinchona alkaloid scaffolds. J Am Chem Soc 2014; 136:10418-31. [PMID: 24979676 DOI: 10.1021/ja504376u] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The introduction of the CF3 group on the C9 atom in quinidine can significantly increase the conformational interconversion barrier of the cinchona alkaloid scaffold. With this modification the conformational behavior of cinchona alkaloids in various solvents can be conveniently investigated via (19)F NMR spectroscopy. Based on the reliable conformational distribution information obtained, the accuracy of both theoretical (PCM) and empirical (Kamlet-Taft) solvation models has been assessed using linear free energy relationship methods. The empirical solvation model was found to provide accurate prediction of solvent effects, while PCM demonstrated a relatively low reliability in the present study. Utilizing similar empirical solvation models along with Karplus-type equations, the conformational behavior of quinidine and 9-epi-quinidine has also been investigated. A model SN2 reaction has been presented to reveal the important role of solvent-induced conformational behavior of cinchona alkaloids in their reactivity.
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Affiliation(s)
- G K Surya Prakash
- Loker Hydrocarbon Research Institute, Department of Chemistry, University of Southern California , Los Angeles, California 90089, United States
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