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Abstract
Nitroxides, also known as nitroxyl radicals, are long-lived or stable radicals with the general structure R1R2N-O•. The spin distribution over the nitroxide N and O atoms contributes to the thermodynamic stability of these radicals. The presence of bulky N-substituents R1 and R2 prevents nitroxide radical dimerization, ensuring their kinetic stability. Despite their reactivity toward various transient C radicals, some nitroxides can be easily stored under air at room temperature. Furthermore, nitroxides can be oxidized to oxoammonium salts (R1R2N═O+) or reduced to anions (R1R2N-O-), enabling them to act as valuable oxidants or reductants depending on their oxidation state. Therefore, they exhibit interesting reactivity across all three oxidation states. Due to these fascinating properties, nitroxides find extensive applications in diverse fields such as biochemistry, medicinal chemistry, materials science, and organic synthesis. This review focuses on the versatile applications of nitroxides in organic synthesis. For their use in other important fields, we will refer to several review articles. The introductory part provides a brief overview of the history of nitroxide chemistry. Subsequently, the key methods for preparing nitroxides are discussed, followed by an examination of their structural diversity and physical properties. The main portion of this review is dedicated to oxidation reactions, wherein parent nitroxides or their corresponding oxoammonium salts serve as active species. It will be demonstrated that various functional groups (such as alcohols, amines, enolates, and alkanes among others) can be efficiently oxidized. These oxidations can be carried out using nitroxides as catalysts in combination with various stoichiometric terminal oxidants. By reducing nitroxides to their corresponding anions, they become effective reducing reagents with intriguing applications in organic synthesis. Nitroxides possess the ability to selectively react with transient radicals, making them useful for terminating radical cascade reactions by forming alkoxyamines. Depending on their structure, alkoxyamines exhibit weak C-O bonds, allowing for the thermal generation of C radicals through reversible C-O bond cleavage. Such thermally generated C radicals can participate in various radical transformations, as discussed toward the end of this review. Furthermore, the application of this strategy in natural product synthesis will be presented.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster, Germany
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2
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Lee K, Gilberti D, Yom C, Meza J, Stewart J, Lee M, Alvarez J, Hart A, Zheng J, Xing Y. Synthetic Electrochemistry Enabled Esterification via Oxidative Mesolytic Cleavage of Alkoxyamines. J Org Chem 2023. [PMID: 37367637 DOI: 10.1021/acs.joc.3c00617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/28/2023]
Abstract
Stable benzylic carbocations were generated via mesolytic cleavage of TEMPO-derived alkoxyamines, which was realized by electrochemical oxidation. This strategy provided an efficient and unique approach to access stabilized carbocations under mild conditions. Esterification of benzylic carbocations using carboxylic acid produced a variety of benzylic esters with a broad substrate scope and excellent functional group compatibility.
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Affiliation(s)
- Kevin Lee
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, New Jersey 07470, United States
| | - Dante Gilberti
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, New Jersey 07470, United States
| | - Clairissa Yom
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, New Jersey 07470, United States
| | - Jacob Meza
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, New Jersey 07470, United States
| | - Jamere Stewart
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, New Jersey 07470, United States
| | - Michael Lee
- Department of Chemistry, William Paterson University of New Jersey, 300 Pompton Rd, Wayne, New Jersey 07470, United States
| | - Justin Alvarez
- Department of Chemistry, Hofstra University, Hempstead, New York 11549, United States
| | - Abigail Hart
- Department of Chemistry, Hofstra University, Hempstead, New York 11549, United States
| | - Justin Zheng
- Department of Chemistry, Hofstra University, Hempstead, New York 11549, United States
| | - Yalan Xing
- Department of Chemistry, Hofstra University, Hempstead, New York 11549, United States
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3
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Qian B, Zhang L, Zhang G, Fu Y, Zhu X, Shen G. Thermodynamic Evaluation on Alkoxyamines of TEMPO Derivatives, Stable Alkoxyamines or Potential Radical Donors? ChemistrySelect 2022. [DOI: 10.1002/slct.202204144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Bao‐Chen Qian
- School of Medical Engineering Jining Medical University Jining Shandong 272000 P. R. China
| | - Lu Zhang
- School of Medical Engineering Jining Medical University Jining Shandong 272000 P. R. China
| | - Gao‐Shuai Zhang
- School of Medical Engineering Jining Medical University Jining Shandong 272000 P. R. China
| | - Yan‐Hua Fu
- College of Chemistry and Environmental Engineering Anyang Institute of Technology Anyang Henan 455000 P. R. China
| | - Xiao‐Qing Zhu
- The State Key Laboratory of Elemento-Organic Chemistry Department of Chemistry Nankai University Tianjin 300071 P. R. China
| | - Guang‐Bin Shen
- School of Medical Engineering Jining Medical University Jining Shandong 272000 P. R. China
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4
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Cherkasov SA, Semikina AD, Kaletina PM, Polienko YF, Morozov DA, Maksimov AM, Kirilyuk IA, Bagryanskaya EG, Parkhomenko DA. The Kinetics of 1,3-Dipolar Cycloaddition of Vinyl Monomers to 2,2,5,5-Tetramethyl-3-imidazoline-3-oxides. Chempluschem 2021; 86:1080-1086. [PMID: 34402220 DOI: 10.1002/cplu.202100266] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/22/2021] [Indexed: 11/08/2022]
Abstract
In our previous work [Edeleva et al. Chem. Commun. 2019, 55, 190-193], we proposed a versatile approach to the activation of the homolysis of an aldonitrone group-containing alkoxyamine by 1,3-dipolar cycloaddition to a vinyl monomer. Both nitroxide- and alkoxyamine-containing aldonitrones were found to be capable of reacting with the activated alkenes. In the present study, the kinetics of these reactions with 11 different vinyl monomers were investigated using EPR and NMR spectroscopy, and apparent activation energies as well as pre-exponential factors were determined. The influence of monomer structure on the rate of the 1,3-dipolar cycloaddition is discussed. For the vinyl monomers typically used in nitroxide mediated polymerization (styrene, methyl methacrylate) the rate coefficient of cycloaddition to the nitroxide is around k(353 K) ∼4 ⋅ 10-4 L mol-1 s-1 , whereas for n-butyl acrylate and methyl vinyl ketone we observed the fastest cycloaddition reaction with k(353 K)=8 ⋅ 10-3 and 4 ⋅ 10-2 L mol-1 s-1 respectively.
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Affiliation(s)
- Sergey A Cherkasov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
- Novosibirsk State University, 1 Pirogova str., Novosibirsk, 630090, Russia
| | - Anastasiya D Semikina
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
- Novosibirsk State University, 1 Pirogova str., Novosibirsk, 630090, Russia
| | - Polina M Kaletina
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
- Novosibirsk State University, 1 Pirogova str., Novosibirsk, 630090, Russia
| | - Yulia F Polienko
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Denis A Morozov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Alexander M Maksimov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Igor A Kirilyuk
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Elena G Bagryanskaya
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
| | - Dmitriy A Parkhomenko
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9 Lavrentiev Ave., Novosibirsk, 630090, Russia
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Audran G, Blyth MT, Coote ML, Gescheidt G, Hardy M, Havot J, Holzritter M, Jacoutot S, Joly JP, Marque SRA, Koumba TMM, Neshchadin D, Vaiedelich E. Homolysis/mesolysis of alkoxyamines activated by chemical oxidation and photochemical-triggered radical reactions at room temperature. Org Chem Front 2021. [DOI: 10.1039/d1qo01276b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Instantaneous and spontaneous room temperature C–ON bond mesolysis of alkoxyamines triggered by chemical oxidation.
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Affiliation(s)
- Gérard Audran
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Mitchell T. Blyth
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Michelle L. Coote
- Research School of Chemistry, Australian National University, Canberra, ACT 2601, Australia
| | - Georg Gescheidt
- Institute of Physical and Theoretical Chemistry, TU Graz, Stremayrgasse 9/Z2, A-8010 Graz, Austria
| | - Micael Hardy
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Jeffrey Havot
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Maxence Holzritter
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Samuel Jacoutot
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Jean-Patrick Joly
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Sylvain R. A. Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | | | - Dmytro Neshchadin
- Institute of Physical and Theoretical Chemistry, TU Graz, Stremayrgasse 9/Z2, A-8010 Graz, Austria
| | - Enzo Vaiedelich
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
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6
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Abstract
In 1986, Rizzardo et al. discovered the nitroxide-mediated polymerization which relies on the reversibility of homolysis of the C-ON bond of alkoxyamine R1R2NOR3, a unique property of these molecules. This discovery has generated a tremendous endeavor in the field of polymer chemistry. Alkoxyamines have been used as initiators/controllers for nitroxide-mediated polymerization. Moreover, photoexcitable alkoxyamines that dissociate under light at different wavelengths have also been developed for polymer chemistry. Over the past few years, alkoxyamines have started to be used in materials sciences. In many cases (e.g., self-healing polymers), the development of smart materials requires the use of smart building blocks, that is, molecules or systems whose properties and/or structures change upon external stimuli. Alkoxyamines exhibit a unique property: reversible homolysis (i.e., homolysis of the C-ON bond into alkyl R3• and nitroxyl R1R2NO• radicals and reformation via the coupling of these two species). Until now, this property has been controlled only by changes in temperatures or by light irradiation. Chemical and/or biochemical control of the homolysis event would open new gates for the application of these molecules in different fields such as biology and medicine. Thus, the concept of smart alkoxyamines is discussed and exemplified via the activation of alkoxyamines using chemical or/and biochemical changes amplifying the polar, steric, and stabilization effects. In situ activation is also discussed. It is shown that (i) increasing the electron-withdrawing properties of the alkyl fragment weakens the C-ON bond and thus favors homolysis but is opposite for the nitroxyl fragment; (ii) increasing the steric hindrance on the nonactive site affords dramatic conformation changes which weaken the C-ON bond; and (iii) increasing the stabilization of the released alkyl radical weakens the C-ON bond. Solvent effects and intramolecular hydrogen bonding are also discussed. Reactions used to highlight our purpose are either reversible or nonreversible and used under conditions that are as mild as possible (temperatures below 40 °C and atmospheric pressure). For example, a several (thousands of millions of) millions of orders of magnitude enhancement of the homolysis rate constant is observed upon enzymatic hydrolysis at 37 °C, meaning that a shift from a stable alkoxyamine (t1/2 = 42 000 milleniums) to a highly labile alkoxyamine (tmax = 1500 s for 35% conversion) is achieved. Applications of this concept are discussed for safe NMP initiators and for theranostic agents.
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Affiliation(s)
- Gérard Audran
- Aix-Marseille Université, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille, Cedex
20, France
| | - Sylvain R. A. Marque
- Aix-Marseille Université, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille, Cedex
20, France
| | - Philippe Mellet
- INSERM, 33076 Bordeaux, Cedex, France
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University of Bordeaux, 146 rue Leo Saignat, 33076 Bordeaux, Cedex, France
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Cherkasov S, Parkhomenko D, Genaev A, Salnikov G, Edeleva M, Morozov D, Rybalova T, Kirilyuk I, Marque SRA, Bagryanskaya E. NMR and EPR Study of Homolysis of Diastereomeric Alkoxyamines. Molecules 2020; 25:E5080. [PMID: 33139669 PMCID: PMC7663419 DOI: 10.3390/molecules25215080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 10/28/2020] [Accepted: 10/30/2020] [Indexed: 12/03/2022] Open
Abstract
Three alkoxyamines based on imidazoline radicals with a pyridine functional group-potential initiators of nitroxide-mediated, controlled radical polymerization-were synthesized. Electron Paramagnetic Resonance (EPR) measurements reveal biexponential kinetics for the thermolysis for diastereomeric alkoxyamines and monoexponential kinetics for an achiral alkoxyamine. For comparison, the thermolysis of all three alkoxyamines was studied by NMR in the presence of three different scavengers, namely tetramethylpiperidine-N-oxyl (TEMPO), thiophenol (PhSH), and β-mercaptoethanol (BME), and detailed analysis of products was performed. NMR differentiates between N-inversion, epimerization, and homolysis reactions. The choice of scavenger is crucial for making a reliable and accurate estimate of the true homolysis rate constant.
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Affiliation(s)
- Sergey Cherkasov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
- National Research University—Novosibirsk State University, 630090 Novosibirsk, Russia
| | - Dmitriy Parkhomenko
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Alexander Genaev
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Georgii Salnikov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Mariya Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Denis Morozov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Tatyana Rybalova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Igor Kirilyuk
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
| | - Sylvain R. A. Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille CEDEX 20, France;
| | - Elena Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia; (S.C.); (D.P.); (A.G.); (G.S.); (M.E.); (D.M.); (T.R.); (I.K.)
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Audran G, Bagryanskaya EG, Marque SRA, Postnikov P. New Variants of Nitroxide Mediated Polymerization. Polymers (Basel) 2020; 12:polym12071481. [PMID: 32630664 PMCID: PMC7408045 DOI: 10.3390/polym12071481] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/24/2020] [Accepted: 06/25/2020] [Indexed: 01/17/2023] Open
Abstract
Nitroxide-mediated polymerization is now a mature technique, at 35 years of age. During this time, several variants have been developed: enhanced spin capture polymerization (ESCP), photoNMP (NMP2), chemically initiated NMP (CI-NMP), spin label NMP (SL-NMP), and plasmon-initiated NMP (PI-NMP). This mini-review is devoted to the features and applications of these variants.
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Affiliation(s)
- Gérard Audran
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
- Correspondence: (G.A.); (E.G.B); (S.R.A.M.); (P.P.)
| | - Elena G. Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry Siberian Branch of Russian Academy of Sciences, Pr. Lavrentjeva 9, Novosibirsk 630090, Russia
- Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia
- Correspondence: (G.A.); (E.G.B); (S.R.A.M.); (P.P.)
| | - Sylvain R. A. Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
- Correspondence: (G.A.); (E.G.B); (S.R.A.M.); (P.P.)
| | - Pavel Postnikov
- Department of Solid State Engineering, University of Chemistry and Technology, 16628 Prague, Czech Republic
- Research School of Chemistry and Applied Biomedical Sciences, Tomsk Polytechnic University, Lenin Ave, 30, Tomsk, Tomsk Oblast 634050, Russia
- Correspondence: (G.A.); (E.G.B); (S.R.A.M.); (P.P.)
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Albalat M, Audran G, Holzritter M, Marque SRA, Mellet P, Vanthuyne N, Voisin P. An enzymatic acetal/hemiacetal conversion for the physiological temperature activation of the alkoxyamine C–ON bond homolysis. Org Chem Front 2020. [DOI: 10.1039/d0qo00559b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Enzymatic trigger. Upon enzymatic hydrolysis by Subtilisin A, highly stable alkoxyamines are transformed into highly labile alkoxyamines able to homolyze spontaneously in less than 500 seconds, at 37 °C.
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Affiliation(s)
| | - Gérard Audran
- Aix-Marseille Univ
- CNRS
- 13397 Marseille Cedex 20
- France
| | | | | | - Philippe Mellet
- INSERM
- 33076 Bordeaux Cedex
- France
- Centre de Résonance Magnétique des Systèmes Biologiques
- 33076 Bordeaux Cedex
| | | | - Pierre Voisin
- Centre de Résonance Magnétique des Systèmes Biologiques
- 33076 Bordeaux Cedex
- France
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10
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Affiliation(s)
- F. Ruipérez
- POLYMAT, University of the Basque Country UPV/EHU, Donostia-San Sebastián, Spain
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11
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Yamasaki T, Buric D, Chacon C, Audran G, Braguer D, Marque SRA, Carré M, Brémond P. Chemical modifications of imidazole-containing alkoxyamines increase C-ON bond homolysis rate: Effects on their cytotoxic properties in glioblastoma cells. Bioorg Med Chem 2019; 27:1942-1951. [PMID: 30975504 DOI: 10.1016/j.bmc.2019.03.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 03/14/2019] [Accepted: 03/16/2019] [Indexed: 01/30/2023]
Abstract
Previously, we described alkoxyamines bearing a pyridine ring as new pro-drugs with low molecular weights and theranostic activity. Upon chemical stimulus, alkoxyamines undergo homolysis and release free radicals, which can, reportedly, enhance magnetic resonance imaging and trigger cancer cell death. In the present study, we describe the synthesis and the anti-cancer activity of sixteen novel alkoxyamines that contain an imidazole ring. Activation of the homolysis was conducted by protonation and/or methylation. These new molecules displayed cytotoxic activities towards human glioblastoma cell lines, including the U251-MG cells that are highly resistant to the conventional chemotherapeutic agent Temozolomide. We further showed that the biological activities of the alkoxyamines were not only related to their half-life times of homolysis. We lastly identified the alkoxyamine (RS/SR)-4a, with both a high antitumour activity and favourable logD7.4 and pKa values, which make it a robust candidate for blood-brain barrier penetrating therapeutics against brain neoplasia.
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Affiliation(s)
| | - Duje Buric
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille, France
| | - Christine Chacon
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille, France
| | | | - Diane Braguer
- Aix Marseille Univ, CNRS, INP, Inst Neurophysiopathol, Marseille, France; APHM, Hôpital Timone, Marseille, France
| | - Sylvain R A Marque
- Aix Marseille Univ, CNRS, ICR, Marseille, France; N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Lavrentieva 9, Novosibirsk 630090, Russian Federation
| | - Manon Carré
- Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille, France.
| | - Paul Brémond
- Aix Marseille Univ, CNRS, ICR, Marseille, France; Aix Marseille Univ, CNRS, INSERM, Institut Paoli-Calmettes, CRCM, Marseille, France.
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12
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Edeleva M, Audran G, Marque S, Bagryanskaya E. Smart Control of Nitroxide-Mediated Polymerization Initiators' Reactivity by pH, Complexation with Metals, and Chemical Transformations. MATERIALS 2019; 12:ma12050688. [PMID: 30813542 PMCID: PMC6427375 DOI: 10.3390/ma12050688] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 02/15/2019] [Accepted: 02/20/2019] [Indexed: 12/24/2022]
Abstract
Because alkoxyamines are employed in a number of important applications, such as nitroxide-mediated polymerization, radical chemistry, redox chemistry, and catalysis, research into their reactivity is especially important. Typically, the rate of alkoxyamine homolysis is strongly dependent on temperature. Nonetheless, thermal regulation of such reactions is not always optimal. This review describes various ways to reversibly change the rate of C–ON bond homolysis of alkoxyamines at constant temperature. The major methods influencing C–ON bond homolysis without alteration of temperature are protonation of functional groups in an alkoxyamine, formation of metal–alkoxyamine complexes, and chemical transformation of alkoxyamines. Depending on the structure of an alkoxyamine, these approaches can have a significant effect on the homolysis rate constant, by a factor of up to 30, and can shorten the half-lifetime from days to seconds. These methods open new prospects for the application of alkoxyamines in biology and increase the safety of (and control over) the nitroxide-mediated polymerization method.
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Affiliation(s)
- Mariya Edeleva
- N. N. Vorozhtsov Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, Novosibirsk 630090, Russia.
- National Research University-Novosibirsk State University, Novosibirsk 630090, Russia.
| | - Gerard Audran
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille CEDEX 20, France.
| | - Sylvain Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille CEDEX 20, France.
| | - Elena Bagryanskaya
- N. N. Vorozhtsov Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, Novosibirsk 630090, Russia.
- National Research University-Novosibirsk State University, Novosibirsk 630090, Russia.
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13
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Audran G, Bosco L, Brémond P, Jugniot N, Marque SRA, Massot P, Mellet P, Moussounda Moussounda Koumba T, Parzy E, Rivot A, Thiaudière E, Voisin P, Wedl C, Yamasaki T. Enzymatic triggering of C–ON bond homolysis of alkoxyamines. Org Chem Front 2019. [DOI: 10.1039/c9qo00899c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Alkoxyamine 1 is selectively hydrolyzed by chymotrypsin and substilisin A into alkoxyamine 2H+ for which C–ON bond homolysis occurred with a 4-fold increase in rate constants compared to 1 while non-specific proteases had no effect.
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14
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Audran G, Bagryanskaya E, Bagryanskaya I, Edeleva M, Joly JP, Marque SRA, Iurchenkova A, Kaletina P, Cherkasov S, Hai TT, Tretyakov E, Zhivetyeva S. How intramolecular coordination bonding (ICB) controls the homolysis of the C–ON bond in alkoxyamines. RSC Adv 2019; 9:25776-25789. [PMID: 35530086 PMCID: PMC9070044 DOI: 10.1039/c9ra05334d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 08/02/2019] [Indexed: 11/23/2022] Open
Abstract
Because the C–ON bond homolysis rate constant kd is an essential parameter of alkoxyamine reactivity, it is especially important to tune kd without a major alteration of the structure of the molecule. Recently, several approaches have become known, e.g., protonation of functional groups and formation of metal complexes. In this paper, coordination reactions of [Zn(hfac)2(H2O)2] with a series of new SG1-based alkoxyamines affording complexes with different structures are presented. The kd values of the complexed forms of the alkoxyamines were compared to those of free and protonated ones to reveal the contribution of the electron-withdrawing property and structure stabilization. Together with previously published data, this work provides clues to the design of alkoxyamines that can be effectively activated upon coordination with metal ions. Furthermore, our results provide insight into the mechanism underlying the influence of complexation on the reactivity of alkoxyamines. This led us to describe different types of coordination: intramolecular in nitroxyl fragment, intramolecular in alkyl fragment, intramolecular between alkyl and nitroxyl fragment, and intermolecular one. All of them exhibit different trends which are dramatically altered by changes in conformation. Because the C–ON bond homolysis rate constant kd is an essential parameter of alkoxyamine reactivity, it is especially important to tune kd without a major alteration of the structure of the molecule.![]()
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Affiliation(s)
- Gérard Audran
- Aix Marseille Univ
- CNRS
- ICR
- UMR 7273
- 13397 Marseille Cedex 20
| | - Elena Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - Irina Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - Mariya Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | | | | | | | - Polina Kaletina
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - Sergey Cherkasov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - Tung To Hai
- Aix Marseille Univ
- CNRS
- ICR
- UMR 7273
- 13397 Marseille Cedex 20
| | - Evgeny Tretyakov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
- Novosibirsk 630090
| | - Svetlana Zhivetyeva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- Novosibirsk 630090
- Russia
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15
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Duttagupta I, Jugniot N, Audran G, Franconi JM, Marque SRA, Massot P, Mellet P, Parzy E, Thiaudière E, Vanthuyne N. Selective On/Off-Nitroxides as Radical Probes to Investigate Non-radical Enzymatic Activity by Electron Paramagnetic Resonance. Chemistry 2018; 24:7615-7619. [PMID: 29722459 DOI: 10.1002/chem.201800866] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Indexed: 12/13/2022]
Abstract
A nitroxide carrying a peptide specific to the binding pocket of the serine proteases chymotrypsin and cathepsin G is prepared. This peptide is attached as an enol ester to the nitroxide. Upon enzymatic hydrolysis of the peptide, the enol ester moiety is transformed into a ketone moiety. This transformation affords a difference of 5 G in phosphorus hyperfine coupling constant between the electronic paramagnetic resonance (EPR) signals of each nitroxide. This property is used to monitor the enzymatic activity of chymotrypsin and cathepsin G by EPR. Michaelis constants were determined and match those reported for conventional optical probes.
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Affiliation(s)
- Indranil Duttagupta
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397, Marseille Cedex 20, France
| | - Natacha Jugniot
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University Bordeaux Segalen, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France
| | - Gérard Audran
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397, Marseille Cedex 20, France
| | - Jean-Michel Franconi
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University Bordeaux Segalen, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France
| | - Sylvain R A Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397, Marseille Cedex 20, France.,N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, Pr. Laurentjeva 9, Novosibirsk, 630090, Russia
| | - Philippe Massot
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University Bordeaux Segalen, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France
| | - Philippe Mellet
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University Bordeaux Segalen, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France.,INSERM, 33076, Bordeaux Cedex, France
| | - Elodie Parzy
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University Bordeaux Segalen, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France
| | - Eric Thiaudière
- Centre de Résonance Magnétique des Systèmes Biologiques, UMR 5536 CNRS, Case 93, University Bordeaux Segalen, 146 rue Leo Saignat, 33076, Bordeaux Cedex, France
| | - Nicolas Vanthuyne
- Aix Marseille Univ., CNRS, ISM2, UMR 7313, Avenue Escadrille Normandie-Niemen, 13397, Marseille Cedex 20, France
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16
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Edeleva MV, Marque SR, Bagryanskaya EG. Imidazoline and imidazolidine nitroxides as controlling agents in nitroxide-mediated pseudoliving radical polymerization. RUSSIAN CHEMICAL REVIEWS 2018. [DOI: 10.1070/rcr4765] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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17
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Audran G, Bikanga R, Brémond P, Edeleva M, Joly JP, Marque SRA, Nkolo P, Roubaud V. How intramolecular hydrogen bonding (IHB) controls the C-ON bond homolysis in alkoxyamines. Org Biomol Chem 2018; 15:8425-8439. [PMID: 28952643 DOI: 10.1039/c7ob02223a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recent amazing results (Nkolo et al., Org. Biomol. Chem., 2017, 6167) on the effect of solvents and polarity on the C-ON bond homolysis rate constants kd of alkoxyamine R1R2NOR3 led us to re-investigate the antagonistic effect of intramolecular hydrogen-bonding (IHB) on kd. Here, IHB is investigated both in the nitroxyl fragment R1R2NO and in the alkyl fragment R3, as well as between fragments, that is, the donating group on the alkyl fragment and the accepting group on the nitroxyl fragment, and conversely. It appears that IHB between fragments (inter IHB) strikingly decreases the homolysis rate constant kd, whereas IHB within the fragment (intra IHB) moderately increases kd. For one alkoxyamine, the simultaneous occurrence of IHB within the nitroxyl fragment and between fragments is reported. The protonation effect is weaker in the presence than in the absence of IHB. A moderate solvent effect is also observed.
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Affiliation(s)
- Gérard Audran
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Raphael Bikanga
- Laboratoire de Substances Naturelles et de Synthèse Organométalliques Université des Sciences et Techniques de Masuku, B.P. 943 Franceville, Gabon
| | - Paul Brémond
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Mariya Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia
| | - Jean-Patrick Joly
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Sylvain R A Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France. and N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia
| | - Paulin Nkolo
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Valérie Roubaud
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
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18
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Nkolo P, Audran G, Bikanga R, Brémond P, Marque SRA, Roubaud V. C-ON bond homolysis of alkoxyamines: when too high polarity is detrimental. Org Biomol Chem 2018; 15:6167-6176. [PMID: 28692104 DOI: 10.1039/c7ob01312d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Throughout the last decade, the effect of electron withdrawing groups (EWGs) has been known to play a role - minor or moderate depending on the nitroxyl fragment R1R2NO - in the change in the homolysis rate constant (kd) for C-ON bond homolysis in alkoxyamines (R1R2NOR). It has been shown that the effect of EWGs on kd is described by a linear relationship with the electrical Hammett constant σI. Since then, linear multi-parameter relationships f(σRS,ν,σI) have been developed to account for the effects involved in the changes in kd, which are the stabilization of the released radical (σRS) and the bulkiness (ν) and polarity (σI) of the alkyl fragment. Since a decade ago, new results have been published highlighting the limits of such correlations. In this article, previous multi-parameter linear relationships are amended using a parabolic model, i.e. (σI,nitroxide - σI,alkyl)2, to describe the effect of EWGs in the alkyl fragment on kd. In contrast to previous studies, these improved linear multi-parameter relationships f(σRS,ν,ΔσI2) are able to account for the presence of several EWGs on the alkyl fragment, R. An unexpectedly strong solvent effect - a ca. 1500-fold increase in kd - from tert-butylbenzene to the water/methanol mixture is also observed for 3-((2,2,6,6-tetramethylpiperidin-1-yl)oxyl)pentane-2,4-dione 1b in comparison to a ca. 5-fold increase in kd that is generally observed.
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Affiliation(s)
- Paulin Nkolo
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Gérard Audran
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Raphael Bikanga
- Laboratoire de Substances Naturelles et de Synthèse Organométalliques Université des Sciences et Techniques de Masuku, B.P. 943, Franceville, Gabon
| | - Paul Brémond
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
| | - Sylvain R A Marque
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France. and N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia
| | - Valérie Roubaud
- Aix Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
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19
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Audran G, Bikanga R, Brémond P, Joly JP, Marque SRA, Nkolo P. Normal, Leveled, and Enhanced Steric Effects in Alkoxyamines Carrying a β-Phosphorylated Nitroxyl Fragment. J Org Chem 2017; 82:5702-5709. [PMID: 28508644 DOI: 10.1021/acs.joc.7b00541] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The design of new R1R2NOR3 alkoxyamines for various applications relies on the accurate prediction of two kinetic parameters, the C-ON bond homolysis rate constant (kd) and its re-formation rate constant (kc). Relationships to describe the steric and polar effects of the R1R2NO fragment ruling kd have been developed. For all cyclic nitroxyl fragments, the steric effect is described as the sum of the bulkiness of the R1 and R2 groups (i.e., normal steric effect), while for the noncyclic nitroxyl fragment (except for one case), a leveled steric effect is assumed. In this work, we show that the normal steric effect also applies to noncyclic nitroxyl fragments and that for one case an enhanced steric effect is also observed, i.e., experimental kd >5-fold larger than the predicted value.
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Affiliation(s)
- Gérard Audran
- Aix Marseille Université , CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Raphael Bikanga
- Laboratoire de Substances Naturelles et des Syntheses Organometalliques, Universite des Sciences et Technique de Masuku , B.P. 493, Franceville, Gabon
| | - Paul Brémond
- Aix Marseille Université , CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Jean-Patrick Joly
- Aix Marseille Université , CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Sylvain R A Marque
- Aix Marseille Université , CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.,N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS , Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia
| | - Paulin Nkolo
- Aix Marseille Université , CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
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20
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Audran G, Bagryanskaya E, Bagryanskaya I, Edeleva M, Marque SRA, Parkhomenko D, Tretyakov E, Zhivetyeva S. Zinc(II) Hexafluoroacetylacetonate Complexes of Alkoxyamines: NMR and Kinetic Investigations. First Step for a New Way to Prepare Hybrid Materials. ChemistrySelect 2017. [DOI: 10.1002/slct.201700678] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Gérard Audran
- Aix Marseille Univ; CNRS, ICR, UMR 7273, case 551; Avenue Escadrille Normandie-Niemen 13397 Marseille Cedex 20 France
| | - Elena Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
| | - Irina Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
| | - Mariya Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
- Novosibirsk State University; 2 Pirogova Str. Novosibirsk 630090 Russia
| | - Sylvain R. A. Marque
- Aix Marseille Univ; CNRS, ICR, UMR 7273, case 551; Avenue Escadrille Normandie-Niemen 13397 Marseille Cedex 20 France
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
| | - Dmitriy Parkhomenko
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
| | - Evgeny Tretyakov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
| | - Svetlana Zhivetyeva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 Novosibirsk 630090 Russia
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21
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Gryn’ova G, Smith LM, Coote ML. Computational design of pH-switchable control agents for nitroxide mediated polymerization. Phys Chem Chem Phys 2017; 19:22678-22683. [DOI: 10.1039/c7cp04337f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
In the present work we use accurate quantum chemistry to evaluate several known and novel nitroxides bearing acid–base groups as pH-switchable control agents for room temperature NMP.
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Affiliation(s)
- Ganna Gryn’ova
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra ACT 2601
- Australia
| | - Leesa M. Smith
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra ACT 2601
- Australia
| | - Michelle L. Coote
- ARC Centre of Excellence for Electromaterials Science
- Research School of Chemistry
- Australian National University
- Canberra ACT 2601
- Australia
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22
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Audran G, Bagryanskaya E, Edeleva M, Marque SRA, Yamasaki T. Dual-initiator alkoxyamines with an N-tert-butyl-N-(1-diethylphosphono-2,2-dimethylpropyl) nitroxide moiety for preparation of block co-polymers. RSC Adv 2017. [DOI: 10.1039/c6ra27231b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel SG1-based alkoxyamines were used as initiators for preparation of block-copolymers both, by sequential NMP and by graft-polymerization.
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Affiliation(s)
- Gérard Audran
- Aix Marseille Université
- CNRS
- ICR
- UMR 7273
- 13397 Marseille Cedex 20
| | - Elena Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
| | - Mariya Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry
- SB RAS
- Novosibirsk 630090
- Russia
- Novosibirsk State University
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23
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Audran G, Bagryanskaya EG, Brémond P, Edeleva MV, Marque SRA, Parkhomenko DA, Rogozhnikova OY, Tormyshev VM, Tretyakov EV, Trukhin DV, Zhivetyeva SI. Trityl-based alkoxyamines as NMP controllers and spin-labels. Polym Chem 2016; 7:6490-6499. [PMID: 28989533 PMCID: PMC5627662 DOI: 10.1039/c6py01303a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Recently, new applications of trityl-nitroxide biradicals were proposed. In the present study, attachment of a trityl radical to alkoxyamines was performed for the first time. The rate constants kd of C-ON bond homolysis in these alkoxyamines were measured and found to be equal to those for alkoxyamines without trityl. The electron paramagnetic resonance (EPR) spectra of the products of alkoxyamine homolysis (trityl-TEMPO and trityl-SG1 biradicals) were recorded, and the corresponding exchange interactions were estimated. The decomposition of trityl-alkoxyamine showed more than an 80% yield of biradicals, meaning that the C-ON bond homolysis is the main reaction. The suitability of these labelled initiators/controllers for polymerisation was exemplified by means of successful nitroxide-mediated polymerisation (NMP) of styrene. Thus, this is the first report of a spin-labelled alkoxyamine suitable for NMP.
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Affiliation(s)
- Gérard Audran
- Aix-Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20 France
| | - Elena G. Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Paul Brémond
- Aix-Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20 France
| | - Mariya V. Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
| | - Sylvain R. A. Marque
- Aix-Marseille Univ, CNRS, ICR, UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20 France
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
| | - Dmitriy A. Parkhomenko
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
| | - Olga Yu. Rogozhnikova
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Victor M. Tormyshev
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Evgeny V. Tretyakov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
| | - Dmitry V. Trukhin
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
- Novosibirsk State University, Novosibirsk 630090, Russia
| | - Svetlana I. Zhivetyeva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS. 9, Lavrentjev Ave, Novosibirsk 630090, Russia
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24
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Audran G, Brémond P, Joly JP, Marque SRA, Yamasaki T. C-ON bond homolysis in alkoxyamines. Part 12: the effect of the para-substituent in the 1-phenylethyl fragment. Org Biomol Chem 2016; 14:3574-83. [PMID: 26975717 DOI: 10.1039/c6ob00384b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The application of alkoxyamines as initiators/controllers in nitroxide mediated polymerization and as agents for theranostics requires the development of switchable (from stable one to labile one) alkoxyamines. One way to achieve this is to tune the polarity of various groups carried by either the alkyl fragment or the nitroxyl fragment. Thus, the effect of protonation/deprotonation of the para-functionalized aryl moiety carried by the alkyl fragment in diethyl(2,2-dimethyl-1-((1,1-dimethylethyl)(1-para-subsitutedphenylethoxy)amino)propyl)phosphonate is investigated. An increase in kd is observed with increasing localized electrical effect, i.e., in the presence of electron withdrawing groups at the para position of the phenyl ring. A striking effect of the intimate ion pair on kd is also observed.
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Affiliation(s)
- Gérard Audran
- Aix-Marseille Université, CNRS, ICR, UMR 7273, Case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France.
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25
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Audran G, Brémond P, Marque SRA, Yamasaki T. C-ON Bond Homolysis of Alkoxyamines, Part 11: Activation of the Nitroxyl Fragment. J Org Chem 2016; 81:1981-8. [PMID: 26878593 DOI: 10.1021/acs.joc.5b02790] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A few years ago, Bagryanskaya and colleagues (J. Org. Chem. 2011) showed that protonation of the nitroxyl fragment deactivated the alkoxyamine C-ON bond. Conversely, our group showed that protonation (Chem. Commun. 2011), as well as other chemical reactions such as oxidation or amine quaternization (Org. Lett. 2012), of the pyridyl moiety carried by the alkyl fragment was suitable to activate the homolysis of the C-ON bond. To pursue our goal of applying alkoxyamines as theranostic agents (Org. Biomol. Chem. 2014 and Mol. Pharmaceutics 2014) by activation of the C-ON bond homolysis, we turned our interest to the chemical activation of the nitroxyl fragment by oxidation/reduction of selected functions. Conversion of a hydroxyl group located close to the nitroxyl moiety successively into aldehyde, then acid, and eventually into ester, led to a successive decrease in kd.
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Affiliation(s)
- Gérard Audran
- Aix Marseille Université, CNRS, ICR, UMR 7273 , 13397 Marseille Cedex 20, France
| | - Paul Brémond
- Aix Marseille Université, CNRS, ICR, UMR 7273 , 13397 Marseille Cedex 20, France
| | - Sylvain R A Marque
- Aix Marseille Université, CNRS, ICR, UMR 7273 , 13397 Marseille Cedex 20, France.,N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS , Pr. Lavrentjeva 9, 630090 Novosibirsk, Russia
| | - Toshihide Yamasaki
- Aix Marseille Université, CNRS, ICR, UMR 7273 , 13397 Marseille Cedex 20, France
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26
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Audran G, Bagryanskaya E, Bagryanskaya I, Brémond P, Edeleva M, Marque SRA, Parkhomenko D, Tretyakov E, Zhivetyeva S. C–ON bond homolysis of alkoxyamines triggered by paramagnetic copper(ii) salts. Inorg Chem Front 2016. [DOI: 10.1039/c6qi00277c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Pyridine-based alkoxyamines were used as ligands for Cu(hfac)2 to prepare the first metallic complexes of alkoxyamines. Structures of complexes were determined by X-ray analysis and a 21-fold increase in the C–ON bond homolysis was observed.
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Affiliation(s)
| | - Elena Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | - Irina Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | | | - Mariya Edeleva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | | | - Dmitriy Parkhomenko
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | - Evgeny Tretyakov
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
| | - Svetlana Zhivetyeva
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS
- 630090 Novosibirsk
- Russia
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27
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Bottle SE, Clement JL, Fleige M, Simpson EM, Guillaneuf Y, Fairfull-Smith KE, Gigmes D, Blinco JP. Light-active azaphenalene alkoxyamines: fast and efficient mediators of a photo-induced persistent radical effect. RSC Adv 2016. [DOI: 10.1039/c6ra18500b] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Reported is the first example of an alkoxyamine that quantitatively yields a nitroxide upon light exposure. The alkoxyamine is used to generate a light driven persistent radical effect and applied to radical insertion, exchange and polymerization reactions.
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Affiliation(s)
- Steven E. Bottle
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | | | - Mirco Fleige
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | - Emily M. Simpson
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | | | - Kathryn E. Fairfull-Smith
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
| | - Didier Gigmes
- Aix Marseille Univ
- CNRS
- ICR UMR 7273
- 13397 Marseille
- France
| | - James P. Blinco
- School of Chemistry
- Physics and Mechanical Engineering
- Science and Engineering Faculty
- Queensland University of Technology
- Brisbane
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28
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Audran G, Brémond P, Marque SRA. Labile alkoxyamines: past, present, and future. Chem Commun (Camb) 2015; 50:7921-8. [PMID: 24817073 DOI: 10.1039/c4cc01364f] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Alkoxyamines--per-alkylated derivatives of hydroxylamine R(1)R(2)NO-R(3)--can undergo C-ON bond homolysis to release a persistent nitroxyl radical R(1)R(2)NO˙ and a transient alkyl radical R(3)˙. Although they were considered as an oddity when discovered in 1974, their properties have been extensively studied since the seminal work of Solomon, Rizzardo and Cacioli (Chem. Abstr., 102, 221335q), who patented the key role of alkoxyamines in nitroxide-mediated polymerization (NMP) in 1985. This feature article surveys and assesses the various applications of alkoxyamines: in tin-free radical chemistry, e.g., for the elaboration of carbo- or hetero-cycles, for the development of new reactions, for total synthesis of natural products; in polymerization under thermal conditions (NMP) or photochemical conditions (nitroxide-mediated photo-polymerization, NMP2); and in the design of smart materials. In this feature article, we also describe our recent findings concerning the chemical triggering of the C-ON bond homolysis in alkoxyamines, affording the controlled generation of alkyl radicals at room temperature. Based on these results, we describe herein some new opportunities for applications in the field of smart materials, and of course, some possible developments as new initiators for NMP as well as an entirely new field of application: the use of alkoxyamines as theranostic agents. Indeed, each of the radicals released after homolysis can play an appealing role: the nitroxide, through dynamic nuclear polarization (DNP), can be used for imagery purposes (diagnostic properties), while the alkyl radical can be used to induce cellular disorders in abnormal cells (therapeutic activity).
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Affiliation(s)
- Gérard Audran
- Aix-Marseille Université CNRS, ICR-UMR 7273, case 551, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France.
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29
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Delplace V, Harrisson S, Ho HT, Tardy A, Guillaneuf Y, Pascual S, Fontaine L, Nicolas J. One-Step Synthesis of Azlactone-Functionalized SG1-Based Alkoxyamine for Nitroxide-Mediated Polymerization and Bioconjugation. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b00178] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Vianney Delplace
- Institut
Galien Paris-Sud, CNRS UMR 8612, Université Paris-Sud, Faculté de Pharmacie, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry Cedex, France
| | - Simon Harrisson
- Université de Toulouse, CNRS, Laboratoire des Interactions
Moléculaires et Réactivité Chimique et Photochimique
UMR 5623, 118 route de
Narbonne, 31062 Toulouse, France
| | - Hien The Ho
- L’UNAM,
Institut des Molécules et Matériaux du Mans, Equipe
Méthodologie et Synthèse des Polymères, UMR CNRS
6283, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Antoine Tardy
- Aix-Marseille Université, CNRS, Institut de Chimie
Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Yohann Guillaneuf
- Aix-Marseille Université, CNRS, Institut de Chimie
Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Sagrario Pascual
- L’UNAM,
Institut des Molécules et Matériaux du Mans, Equipe
Méthodologie et Synthèse des Polymères, UMR CNRS
6283, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Laurent Fontaine
- L’UNAM,
Institut des Molécules et Matériaux du Mans, Equipe
Méthodologie et Synthèse des Polymères, UMR CNRS
6283, Université du Maine, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France
| | - Julien Nicolas
- Institut
Galien Paris-Sud, CNRS UMR 8612, Université Paris-Sud, Faculté de Pharmacie, 5 rue Jean-Baptiste Clément, F-92296 Châtenay-Malabry Cedex, France
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30
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Audran G, Ibanou MB, Brémond P, Joly JP, Marque SRA. Part 10: chemically triggered alkoxyamine C–ON bond homolysis in ionic liquid solvents. RSC Adv 2015. [DOI: 10.1039/c5ra13899j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The homolysis of the C–ON bond of three alkoxyamines – the non-activated alkoxyamine 1, its N-methylated version 2 and its N-oxidated version 3 – is investigated in several ionic liquids.
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Affiliation(s)
- Gerard Audran
- Aix-Marseille Université
- CNRS
- ICR
- UMR 7273
- 13397 Marseille, Cedex 20
| | | | - Paul Brémond
- Aix-Marseille Université
- CNRS
- ICR
- UMR 7273
- 13397 Marseille, Cedex 20
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31
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Bagryanskaya EG, Brémond P, Butscher T, Marque SRA, Parkhomenko D, Roubaud V, Siri D, Viel S. Hydrogen-Bonding Effects for the C-ON Bond Homolysis and Reformation Reactions of Alkoxyamines. MACROMOL CHEM PHYS 2014. [DOI: 10.1002/macp.201400438] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Elena G. Bagryanskaya
- International Tomography Center SB RAS; Institutskaya 3A 630090 Novosibirsk Russia
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS; Pr. Lavrentjeva 9 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova 2 630090 Novosibirsk Russia
| | - Paul Brémond
- Aix Marseille Université; CNRS, ICR UMR 7273 13397 Marseille cedex 20 France
| | - Teddy Butscher
- Aix Marseille Université; CNRS, ICR UMR 7273 13397 Marseille cedex 20 France
| | | | - Dmitry Parkhomenko
- International Tomography Center SB RAS; Institutskaya 3A 630090 Novosibirsk Russia
- Novosibirsk State University; Pirogova 2 630090 Novosibirsk Russia
| | - Valérie Roubaud
- Aix Marseille Université; CNRS, ICR UMR 7273 13397 Marseille cedex 20 France
| | - Didier Siri
- Aix Marseille Université; CNRS, ICR UMR 7273 13397 Marseille cedex 20 France
| | - Stéphane Viel
- Aix Marseille Université; CNRS, ICR UMR 7273 13397 Marseille cedex 20 France
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32
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Moncelet D, Voisin P, Koonjoo N, Bouchaud V, Massot P, Parzy E, Audran G, Franconi JM, Thiaudière E, Marque SRA, Brémond P, Mellet P. Alkoxyamines: Toward a New Family of Theranostic Agents against Cancer. Mol Pharm 2014; 11:2412-9. [DOI: 10.1021/mp5001394] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Damien Moncelet
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Pierre Voisin
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Neha Koonjoo
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Véronique Bouchaud
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Philippe Massot
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Elodie Parzy
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Gérard Audran
- Aix Marseille Université, CNRS, ICR UMR
7273, 13397, Marseille, France
| | - Jean-Michel Franconi
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | - Eric Thiaudière
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
| | | | - Paul Brémond
- Aix Marseille Université, CNRS, ICR UMR
7273, 13397, Marseille, France
| | - Philippe Mellet
- CRMSB,
CNRS-UMR-5536, Université Victor Segalen Bordeaux 2, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
- INSERM, 146 rue Léo Saignat, Case
93, 33076 Bordeaux
Cedex, France
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33
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Parkhomenko DA, Edeleva MV, Kiselev VG, Bagryanskaya EG. pH-Sensitive C–ON Bond Homolysis of Alkoxyamines of Imidazoline Series: A Theoretical Study. J Phys Chem B 2014; 118:5542-50. [DOI: 10.1021/jp5024372] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Dmitriy A. Parkhomenko
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9, Lavrentieva Ave., Novosibirsk, 630090 Russia
- Novosibirsk State University, 2,
Pirogova Str., Novosibirsk, 630090 Russia
- International Tomography Center SB RAS, 3a, Institutskaya Str., Novosibirsk, 630090 Russia
| | - Mariya V. Edeleva
- International Tomography Center SB RAS, 3a, Institutskaya Str., Novosibirsk, 630090 Russia
| | - Vitaly G. Kiselev
- Novosibirsk State University, 2,
Pirogova Str., Novosibirsk, 630090 Russia
- Institute of Chemical Kinetics and Combustion SB RAS, 3, Institutskaya Str., Novosibirsk, 630090 Russia
| | - Elena G. Bagryanskaya
- N. N. Vorozhtsov Novosibirsk Institute of Organic Chemistry SB RAS, 9, Lavrentieva Ave., Novosibirsk, 630090 Russia
- Novosibirsk State University, 2,
Pirogova Str., Novosibirsk, 630090 Russia
- International Tomography Center SB RAS, 3a, Institutskaya Str., Novosibirsk, 630090 Russia
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34
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Audran G, Ibanou MBB, Brémond P, Marque SRA, Obame G, Roubaud V, Siri D. Chemically triggered C-ON bond homolysis in alkoxyamines. Part 7. Remote polar effect. J PHYS ORG CHEM 2014. [DOI: 10.1002/poc.3275] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Gérard Audran
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
| | - Matisse Bim Batsiandzy Ibanou
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
| | - Paul Brémond
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
| | - Sylvain R. A. Marque
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
| | - Germain Obame
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
| | - Valérie Roubaud
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
| | - Didier Siri
- Université d'Aix-Marseille CNRS-ICR, UMR 7273; case 551, Avenue Escadrille Normandie-Niemen 13397 Marseille cedex 20, France
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35
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Audran G, Brémond P, Franconi JM, Marque SRA, Massot P, Mellet P, Parzy E, Thiaudière E. Alkoxyamines: a new family of pro-drugs against cancer. Concept for theranostics. Org Biomol Chem 2014; 12:719-23. [DOI: 10.1039/c3ob42076k] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Concept to apply alkoxyamines as a theranostic against cancer. The success relies on the highly biological generation of an unselective alkyl radical at the right time and at the right place.
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Affiliation(s)
- Gérard Audran
- Université d'Aix-Marseille CNRS – UMR 7273
- 13397 Marseille cedex 20, France
| | - Paul Brémond
- Université d'Aix-Marseille CNRS – UMR 7273
- 13397 Marseille cedex 20, France
| | - Jean-Michel Franconi
- CRMSB
- CNRS-UMR-5536
- Université Victor Segalen Bordeaux 2
- 33076 Bordeaux cedex, France
| | | | - Philippe Massot
- CRMSB
- CNRS-UMR-5536
- Université Victor Segalen Bordeaux 2
- 33076 Bordeaux cedex, France
| | - Philippe Mellet
- CRMSB
- CNRS-UMR-5536
- Université Victor Segalen Bordeaux 2
- 33076 Bordeaux cedex, France
- INSERM
| | - Elodie Parzy
- CRMSB
- CNRS-UMR-5536
- Université Victor Segalen Bordeaux 2
- 33076 Bordeaux cedex, France
| | - Eric Thiaudière
- CRMSB
- CNRS-UMR-5536
- Université Victor Segalen Bordeaux 2
- 33076 Bordeaux cedex, France
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36
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Brémond P, Butscher T, Roubaud V, Siri D, Viel S. Intramolecular hydrogen bond in alkoxyamines. Influence on the C-ON bond homolysis. J Org Chem 2013; 78:10524-9. [PMID: 24070391 DOI: 10.1021/jo401681w] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The C-ON bond homolysis in alkoxyamines can be influenced by the presence of an intramolecular hydrogen bond (IHB) between the alkyl and the nitroxyl fragments, which leads to an 8-fold decrease in the homolysis rate constant k(d). When the IHB is disrupted by the solvent or by substitution of the hydrogen involved in the IHB by a protecting group (OMe, OAc, OBz, OBn, or OTBDMS), a higher homolysis rate constant k(d) is observed, as expected from the correlations developed by Marque (Bertin, D.; Gigmes, D.; Marque, S.; Tordo, P. Macromolecules 2005, 38, 2638-2650). Results were confirmed by DFT calculations at the B3LYP/6-31G(d,p) level.
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Affiliation(s)
- Paul Brémond
- Aix-Marseille Université , CNRS, Institut de Chimie Radicalaire UMR7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
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37
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Audran G, Bosco L, Brémond P, Marque SRA, Roubaud V, Siri D. Chemically Triggered C–ON Bond Homolysis of Alkoxyamines. 8. Quaternization and Steric Effects. J Org Chem 2013; 78:9914-20. [DOI: 10.1021/jo401674v] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Gérard Audran
- Aix-Marseille Université,
CNRS,
Institut de Chimie Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Lionel Bosco
- Aix-Marseille Université,
CNRS,
Institut de Chimie Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Paul Brémond
- Aix-Marseille Université,
CNRS,
Institut de Chimie Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Sylvain R. A. Marque
- Aix-Marseille Université,
CNRS,
Institut de Chimie Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Valérie Roubaud
- Aix-Marseille Université,
CNRS,
Institut de Chimie Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Didier Siri
- Aix-Marseille Université,
CNRS,
Institut de Chimie Radicalaire UMR 7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
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38
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Audran G, Brémond P, Marque SRA, Obame G. Chemically Triggered C–ON Bond Homolysis in Alkoxyamines. 6. Effect of the Counteranion. J Org Chem 2013; 78:7754-7. [DOI: 10.1021/jo401227a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gérard Audran
- Aix-Marseille Université, CNRS, ICR UMR-7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille Cedex 20, France
| | - Paul Brémond
- Aix-Marseille Université, CNRS, ICR UMR-7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille Cedex 20, France
| | - Sylvain R. A. Marque
- Aix-Marseille Université, CNRS, ICR UMR-7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille Cedex 20, France
| | - Germain Obame
- Aix-Marseille Université, CNRS, ICR UMR-7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille Cedex 20, France
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39
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Audran G, Brémond P, Ibanou MBB, Marque SRA, Roubaud V, Siri D. Chemically triggered C–ON bond homolysis in alkoxyamines: regioselectivity and chemoselectivity. Org Biomol Chem 2013; 11:7738-50. [DOI: 10.1039/c3ob41549j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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40
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Audran G, Brémond P, Marque SRA, Obame G. Chemically Triggered C–ON Bond Homolysis of Alkoxyamines. 5. Cybotactic Effect. J Org Chem 2012; 77:9634-40. [DOI: 10.1021/jo3016665] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gérard Audran
- Université d’Aix-Marseille CNRS-UMR 7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille cedex 20, France
| | - Paul Brémond
- Université d’Aix-Marseille CNRS-UMR 7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille cedex 20, France
| | - Sylvain R. A. Marque
- Université d’Aix-Marseille CNRS-UMR 7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille cedex 20, France
| | - Germain Obame
- Université d’Aix-Marseille CNRS-UMR 7273, case 551, Avenue Escadrille Normandie-Niemen,
13397 Marseille cedex 20, France
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Audran G, Brémond P, Marque SRA, Obame G. Hyperfine Coupling Constants of β-Phosphorylated Nitroxides: A Tool to Probe the Cybotactic Effect by Electron Paramagnetic Resonance. Chemphyschem 2012; 13:3542-8. [DOI: 10.1002/cphc.201200420] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Indexed: 11/10/2022]
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Audran G, Brémond P, Marque SRA, Obame G. Chemically triggered C–ON bond homolysis of alkoxyamines. Part 4: solvent effect. Polym Chem 2012. [DOI: 10.1039/c2py20447a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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