1
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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.
| |
Collapse
|
2
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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.
| |
Collapse
|
3
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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
| |
Collapse
|
4
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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
| |
Collapse
|
5
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
Affiliation(s)
- Paul Brémond
- Aix-Marseille Université , CNRS, Institut de Chimie Radicalaire UMR7273, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | | | | | | | | |
Collapse
|
6
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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
| |
Collapse
|
7
|
Mileo E, Etienne E, Martinho M, Lebrun R, Roubaud V, Tordo P, Gontero B, Guigliarelli B, Marque SRA, Belle V. Enlarging the Panoply of Site-Directed Spin Labeling Electron Paramagnetic Resonance (SDSL-EPR): Sensitive and Selective Spin-Labeling of Tyrosine Using an Isoindoline-Based Nitroxide. Bioconjug Chem 2013; 24:1110-7. [DOI: 10.1021/bc4000542] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elisabetta Mileo
- Aix-Marseille Université, CNRS, BIP UMR 7281, 31 chemin J. Aiguier, 13402 Marseille Cedex
20, France
| | - Emilien Etienne
- Aix-Marseille Université, CNRS, BIP UMR 7281, 31 chemin J. Aiguier, 13402 Marseille Cedex
20, France
| | - Marlène Martinho
- Aix-Marseille Université, CNRS, BIP UMR 7281, 31 chemin J. Aiguier, 13402 Marseille Cedex
20, France
| | - Régine Lebrun
- Aix-Marseille Université, Plate-forme Protéomique
IMM, 31 chemin J. Aiguier, 13402 Marseille Cedex 20, France
| | - Valérie Roubaud
- Aix-Marseille Université, CNRS, ICR UMR 7273, Avenue Escadrille
Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Paul Tordo
- Aix-Marseille Université, CNRS, ICR UMR 7273, Avenue Escadrille
Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Brigitte Gontero
- Aix-Marseille Université, CNRS, BIP UMR 7281, 31 chemin J. Aiguier, 13402 Marseille Cedex
20, France
| | - Bruno Guigliarelli
- Aix-Marseille Université, CNRS, BIP UMR 7281, 31 chemin J. Aiguier, 13402 Marseille Cedex
20, France
| | - Sylvain R. A. Marque
- Aix-Marseille Université, CNRS, ICR UMR 7273, Avenue Escadrille
Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Valérie Belle
- Aix-Marseille Université, CNRS, BIP UMR 7281, 31 chemin J. Aiguier, 13402 Marseille Cedex
20, France
| |
Collapse
|
8
|
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] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
9
|
Brémond P, Koïta A, Marque SRA, Pesce V, Roubaud V, Siri D. Chemically Triggered C–ON Bond Homolysis of Alkoxyamines. Quaternization of the Alkyl Fragment. Org Lett 2011; 14:358-61. [DOI: 10.1021/ol2031075] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Paul Brémond
- Laboratoire Chimie Provence UMR 6264 − CNRS, Université de Provence, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Abdoulaye Koïta
- Laboratoire Chimie Provence UMR 6264 − CNRS, Université de Provence, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Sylvain R. A. Marque
- Laboratoire Chimie Provence UMR 6264 − CNRS, Université de Provence, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Vincent Pesce
- Laboratoire Chimie Provence UMR 6264 − CNRS, Université de Provence, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Valérie Roubaud
- Laboratoire Chimie Provence UMR 6264 − CNRS, Université de Provence, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| | - Didier Siri
- Laboratoire Chimie Provence UMR 6264 − CNRS, Université de Provence, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille Cedex 20, France
| |
Collapse
|
10
|
Bagryanskaya E, Brémond P, Edeleva M, Marque SRA, Parkhomenko D, Roubaud V, Siri D. Chemically triggered C-ON bond homolysis in alkoxyamines. Part 2: DFT investigation and application of the pH effect on NMP. Macromol Rapid Commun 2011; 33:152-7. [PMID: 22102429 DOI: 10.1002/marc.201100590] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Revised: 10/07/2011] [Indexed: 11/12/2022]
Abstract
In recent work, a 15-fold increase in the C-ON bond homolysis rate constant kd of 4-pyridylethyl-SG1-based alkoxyamine was observed upon protonation of the pyridyl moiety in organic solvent. In this report, the pH dependence of kd (pKa = 4.7) is investigated in D2O/CD3OD (v/v 1:1). A 64-fold increase in kd is observed at acidic pH. Calculations show that the increase in kd upon protonation is due to both an increase in the stabilization of the protonated 4-pyridylethyl radical and an increase of the destabilization of the starting materials through an increase in the polarity of the alkyl fragment. This new alkoxyamine is applied to NMP of styrene and sodium styrene sulfonate.
Collapse
Affiliation(s)
- Elena Bagryanskaya
- International Tomography Center, Institutskaya 3A, 630090 Novosibirsk, Russia
| | - Paul Brémond
- Aix-Marseille Université, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Mariya Edeleva
- International Tomography Center, Institutskaya 3A, 630090 Novosibirsk, Russia
| | - Sylvain R A Marque
- Aix-Marseille Université, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France.
| | - Dmitriy Parkhomenko
- International Tomography Center, Institutskaya 3A, 630090 Novosibirsk, Russia
| | - Valérie Roubaud
- Aix-Marseille Université, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| | - Didier Siri
- Aix-Marseille Université, case 521, Avenue Escadrille Normandie-Niemen, 13397 Marseille cedex 20, France
| |
Collapse
|
11
|
Lorenzi M, Puppo C, Lebrun R, Lignon S, Roubaud V, Martinho M, Mileo E, Tordo P, Marque SRA, Gontero B, Guigliarelli B, Belle V. Tyrosine-targeted spin labeling and EPR spectroscopy: an alternative strategy for studying structural transitions in proteins. Angew Chem Int Ed Engl 2011; 50:9108-11. [PMID: 21919142 DOI: 10.1002/anie.201102539] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 06/03/2011] [Indexed: 11/10/2022]
Affiliation(s)
- Magali Lorenzi
- Bioénergétique et Ingénierie des Protéines UPR 9036, CNRS, Aix-Marseille Université, Institut de Microbiologie de la Méditérranée, 31 chemin J. Aiguier, 13402 Marseille Cedex 20, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Lorenzi M, Puppo C, Lebrun R, Lignon S, Roubaud V, Martinho M, Mileo E, Tordo P, Marque SRA, Gontero B, Guigliarelli B, Belle V. Tyrosine-Targeted Spin Labeling and EPR Spectroscopy: An Alternative Strategy for Studying Structural Transitions in Proteins. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201102539] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
13
|
Dumur F, Roubaud V, Dumas E, Mayer C. Efficient Syntheses of Thiophenol Derivatives. Synlett 2010. [DOI: 10.1055/s-0030-1258058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
14
|
Roubaud V, Bliek C, Lauricella R, Vila F, Siri D, Tordo P. CONFORMATIONAL ANALYSIS OF DIALKYL (2,5-DIALKYL PYRROLIDIN-2-YL)PHOSPHONATES AND DIETHYL(2,5,5-TRIMETHYL PYRROLIDIN-2-YL)PHOSPHONATE BY X-RAY ANALYSIS, NMR AND FORCE FIELD CALCULATIONS. PHOSPHORUS SULFUR 2006. [DOI: 10.1080/10426509608046358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Valérie Roubaud
- a Université de Provence, CNRS URA 1412, Structure et Réactivité des Espèces Paramagnétiques , case 521, Av. Escadrille Normandie-Niemen, 13397, Marseille Cedex 13, France
| | - Christel Bliek
- a Université de Provence, CNRS URA 1412, Structure et Réactivité des Espèces Paramagnétiques , case 521, Av. Escadrille Normandie-Niemen, 13397, Marseille Cedex 13, France
| | - Robert Lauricella
- a Université de Provence, CNRS URA 1412, Structure et Réactivité des Espèces Paramagnétiques , case 521, Av. Escadrille Normandie-Niemen, 13397, Marseille Cedex 13, France
| | - Francis Vila
- a Université de Provence, CNRS URA 1412, Structure et Réactivité des Espèces Paramagnétiques , case 521, Av. Escadrille Normandie-Niemen, 13397, Marseille Cedex 13, France
| | - Didier Siri
- a Université de Provence, CNRS URA 1412, Structure et Réactivité des Espèces Paramagnétiques , case 521, Av. Escadrille Normandie-Niemen, 13397, Marseille Cedex 13, France
| | - Paul Tordo
- a Université de Provence, CNRS URA 1412, Structure et Réactivité des Espèces Paramagnétiques , case 521, Av. Escadrille Normandie-Niemen, 13397, Marseille Cedex 13, France
| |
Collapse
|
15
|
Abstract
The nitrone N-[(1-oxidopyridin-1-ium-4-yl)-methylidene]-1,1-bis(ethoxycarbonyl)ethylamine N-oxide (DEEPyON) was synthesized and used as a spin trapping agent. The kinetic aspects of the superoxide detection by this new spin trap and by two other diester-nitrones, i.e. 2,2-diethoxycarbonyl-3,4-dihydro-2H-pyrrole-1-oxide (DEPO) and N-benzylidene-1,1-bis(ethoxycarbonyl)ethylamine N-oxide (DEEPN), were examined by determining the rate constants for the trapping reaction and for the spin adduct decay at pH 7.2. Comparing the results obtained to those given by analogous monoester-nitrones showed that both the spin trapping and the adduct decay reactions were faster in the presence of a second ester group in the cyclic nitrone series, while the superoxide trapping capacities of linear diester-nitrones were found to be dramatically weak. It follows from this study that DEPO and 2-ethoxycarbonyl-2-methyl-3,4-dihydro-2H-pyrrole-1-oxide (EMPO) are superior when it comes to superoxide detection. Below 0.005 mol dm(-3), DEPO is to date the only nitrone capable of clearly detecting superoxide, while EMPO should be preferred at higher spin trap concentration.
Collapse
Affiliation(s)
- Ahmad Allouch
- Laboratoire TRACES, case 541, Universités d'Aix-Marseille 1 et 3, Faculté de St. Jérôme, 13397 Marseille cedex 20, France.
| | | | | | | | | |
Collapse
|
16
|
Lauricella R, Allouch A, Roubaud V, Bouteiller JC, Tuccio B. A new kinetic approach to the evaluation of rate constants for the spin trapping of superoxide/hydroperoxyl radical by nitrones in aqueous media. Org Biomol Chem 2004; 2:1304-9. [PMID: 15105920 DOI: 10.1039/b401333f] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new kinetic approach to the evaluation of rate constants for the spin trapping of superoxide/hydroperoxyl radical by nitrones in buffered media is described. This method is based on a competition between the superoxide trapping by the nitrone and the spontaneous dismutation of this radical in aqueous media. EPR spectra are recorded as a function of time at various nitrone concentrations, and kinetic curves are obtained after treatment of these spectra using both singular value decomposition and pseudo-inverse deconvolution methods. Modelling these curves permits the determination of the rate constants k(T) and k(D) for the superoxide trapping and the adduct decay reactions, respectively. Kinetics parameters thus obtained with six nitrones, namely the 2-ethoxycarbonyl-2-methyl-3,4-dihydro-2H-pyrrole N-oxide (EMPO), the 5-diethoxyphosphoryl-5-methyl-3,4-dihydro-5H-pyrrole N-oxide (DEPMPO), the 5,5-dimethyl-3,4-dihydro-5H-pyrrole N-oxide (DMPO), the 1,3,5-tri[(N-(1-diethylphosphono)-1-methylethyl)-N-oxy-aldimine]benzene (TN), the N-benzylidene-1-ethoxycarbonyl-1-methylethylamine N-oxide (EPPN), and the N-[(1-oxidopyridin-1-ium-4-yl)methylidene]-1-ethoxycarbonyl-1-methylethylamine N-oxide (EPPyON), indicate that cyclic nitrones trapped superoxide faster than the linear ones. However, the low k(T) values obtained for compounds show that there is still a need for new molecules with better spin trapping capacities.
Collapse
Affiliation(s)
- Robert Lauricella
- Laboratoire TRACES, Case 541, Universite de Provence, Faculte de Saint Jerome, Av. Escadrille Normandie Niemen, 13397 Marseille Cedex 20, France
| | | | | | | | | |
Collapse
|
17
|
Vergely C, Renard C, Moreau D, Perrin- Sarrado C, Roubaud V, Tuccio B, Rochette L. Effect of two new PBN-derived phosphorylated nitrones against postischaemic ventricular dysrhythmias. Fundam Clin Pharmacol 2003; 17:433-42. [PMID: 12914545 DOI: 10.1046/j.1472-8206.2003.00158.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Spin traps might exert antioxidant cardioprotective effects during myocardial ischaemia-reperfusion where free radicals are thought to be responsible for the occurrence of reperfusion injury. The aim of our study was to investigate the effects of two new alpha-phenyl N-tert-butylnitrone (PBN)-derived beta-phosphorylated nitrones: 2-N-oxy-N-[benzylidène amino] diéthyl propyl-2-phosphate (PPN) and 1-diethoxyphosphoryl-1-methyl-N-[(1-oxido-pyridin-1-ium-4-yl) methylidene] ethylamine N-oxide (4-PyOPN) compared with PBN on (1) the evolution of cardiovascular parameters and (2) the postischaemic recovery. Anaesthetized rats were injected with 120 micro mol/kg of the nitrones or 14 micro mol/kg of amiodarone, used as a reference antidysrhythmic drug. Ischaemia was induced in vivo through ligation of the left anterior descending coronary artery for 5 min followed by 15 min of reperfusion after release. Cardiovascular parameters and occurrence of ventricular premature beats (VPB), ventricular tachycardia (VT) and fibrillation (VF) were recorded throughout the experiment. Under nonischaemic conditions, none of the three spin traps was shown to modify cardiovascular parameters during the 25-min measurement period. Solvent-treated (NaCl 0.9%) animals challenged with ischaemia-reperfusion exhibited 39 +/- 10 VPB, 156 +/- 39 s of VT and 60% mortality caused by sustained VF. Nitrones improved slightly postischaemic recovery, reducing the occurrence of VF and mortality to 33% whereas amiodarone injection totally suppressed rhythm disturbances and mortality. Our study has shown only limited antidysrhythmic cardioprotective effects of PBN-derived beta-phosphorylated nitrones during reperfusion after a regional myocardial ischaemia but also minor antioxidant properties of these spin trapping agents.
Collapse
Affiliation(s)
- Catherine Vergely
- Laboratoire de Physiopathologie et Pharmacologie Cardio-vasculaires Expérimentales (LPPCE), Facultés de Médecine and Pharmacie, Dijon, France.
| | | | | | | | | | | | | |
Collapse
|
18
|
Abstract
The synthesis of two new nitrones, N-benzylidene-1,1-bis(ethoxycarbonyl)ethylamine N-oxide (DEEPN) and N-[(1-oxidopyridin-1-ium-4-yl)methylidene]-1-ethoxycarbonyl-1- methylethylamine N-oxide (EPPyON), is described. Measurement of their n-octanol-phosphate buffer partition coefficient permitted evaluation of their lipophilicity. Their capacity to act as spin trapping agents was investigated in aqueous media. Although these nitrones were unsuitable for detecting hydroxyl radical, they efficiently trapped various carbon- and oxygen-centred radicals, including superoxide, in aqueous media. The half-lives of their superoxide adducts were determined at pH 5.8 and 7.2. At neutral pH, the superoxide spin adduct of DEEPN was found to be as persistent as that of 5-diethoxyphosphoryl-5-methyl-3,4-dihydropyrrole N-oxide (DEPMPO). Consequently, DEEPN was believed to be an efficient trap for superoxide detection in aqueous media.
Collapse
Affiliation(s)
- Ahmad Allouch
- UMR 6517 CNRS-Universités d'Aix-Marseille 1 et 3, Case 541, 13397 Marseille, France
| | | | | | | | | |
Collapse
|
19
|
Roubaud V, Dozol H, Rizzi C, Lauricella R, Bouteiller JC, Tuccio B. Poly(β-phosphorylated nitrones): preparation and characterisation of a new class of spin trap. ACTA ACUST UNITED AC 2002. [DOI: 10.1039/b111691f] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
20
|
Roubaud V, Lauricella R, Bouteiller JC, Tuccio B. N-2-(2-ethoxycarbonyl-propyl) alpha-phenylnitrone: an efficacious lipophilic spin trap for superoxide detection. Arch Biochem Biophys 2002; 397:51-6. [PMID: 11747309 DOI: 10.1006/abbi.2001.2657] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The spin trap N-2-(2-ethoxycarbonyl-propyl) alpha-phenylnitrone, EPPN 1, synthesized by methods previously described, has been purified by recrystallization. A measure of its octanol-phosphate buffer partition coefficient (P(oct) = 29.8) indicated that EPPN was quite lipophilic, yet it could be easily solubilized in water up to 60 mmol L(-1). Although this nitrone was unsuitable for detecting hydroxyl radical, it efficiently trapped several carbon-centered radicals as well as superoxide in aqueous media, without yielding any artifactual signals. Kinetic studies of the superoxide adduct decay gave rate constants k(D) of 2 x 10(-3) and 2.1 x 10(-3) s(-1) at pH 5.6 and pH 7, respectively. EPPN can be considered as an easily prepared and highly pure spin trap, allowing efficient detection of superoxide in aqueous environments.
Collapse
Affiliation(s)
- Valérie Roubaud
- UMR 6517 CNRS, Universités d'Aix-Marseille 1 et 3, 13397 Marseille Cedex 20, France
| | | | | | | |
Collapse
|
21
|
Roubaud V, Rizzi C, Guérin S, Lauricella R, Bouteiller JC, Tuccio B. Characteristics and use as spin trapping agent of a beta-phosphorylated nitroso compound, DEPNP. Free Radic Res 2001; 34:237-49. [PMID: 11264899 DOI: 10.1080/10715760100300221] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
2-(Diethylphosphonate)-nitrosopropane (DEPNP), prepared by oxidation of the corresponding aminophosphonate, was found to essentially exist as monomer in both water and organic solvents. The mechanisms of its degradation under 80 degrees C heating or visible light exposure were studied by EPR spectroscopy: its decomposition gave rise to paramagnetic by-products, which have been identified as DEPNP/.C(CH(3) )(2) [P(O)(OC(2) H(5) )(2) ] and DEPNP/.P(O)(OC(2) H(5) )(2) spin adducts. Despite this drawback, DEPNP was successfully used as spin trapping agents to scavenge various carbon - and phosphorus-centred free radicals both in aqueous and organic media, giving rise to intense EPR spectra characteristic of the species trapped.
Collapse
Affiliation(s)
- V Roubaud
- Laboratoire SREP, UMR 6517 CNRS-Universités d'Aix -Marseille 1 et 3, Case 541, 13397 Marseille Cedex 20, France
| | | | | | | | | | | |
Collapse
|
22
|
Roubaud V, Siri D, Tordo P, Hdii F, Reboul JP. (2,5-Diméthylpyrrolidin-2-yl)phosphonate de Diisopropyle. Acta Crystallogr C 1998. [DOI: 10.1107/s0108270197008408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
|
23
|
Roubaud V, Sankarapandi S, Kuppusamy P, Tordo P, Zweier JL. Quantitative measurement of superoxide generation and oxygen consumption from leukocytes using electron paramagnetic resonance spectroscopy. Anal Biochem 1998; 257:210-7. [PMID: 9514781 DOI: 10.1006/abio.1997.2542] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In view of the important role of superoxide in cellular injury, there has been a great need for methods suitable for quantitation of superoxide production from cells. Previous methods have had limited sensitivity or specificity as well as problems with side reactions in cellular systems. Recently, we have shown that the new spin trap 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline-N-oxide has ideal properties for quantitative superoxide measurement in chemical/biochemical systems; however, its suitability and potential for measurements in cellular systems has not been determined. Therefore, we evaluated the use of DEPMPO for quantitative measurement of superoxide formed by polymorphonuclear leukocytes. After activation of these cells with the phorbol ester (PMA, 200 ng/ml) or opsonized zymosan (1 mg/ml) at 24 degrees C a strong signal of the superoxide adduct, DEPMPO-OOH, was observed. This technique was highly sensitive and enabled measurement of superoxide generation from as few as 2 x 10(3) cells. The kinetics of adduct formation and decay were measured which enabled quantitation of superoxide formation. Spin label electron paramagnetic resonance (EPR) oximetry was used to measure the oxygen consumption from these cells. With PMA activation rapid onset of superoxide generation occurred with a rate of 0.78 nmol/min/10(6) cells while with zymosan a slower gradual onset of activation was seen to a peak rate of 0.061 nmol/min/10(6) cells. With both stimulators the ratios of superoxide production to oxygen consumption were similar with values of approximately 50% obtained. Thus, EPR spin trapping with DEPMPO together with EPR oximetry methods can be used to provide sensitive and specific quantitation of cellular superoxide generation and oxygen consumption. These methods provide a promising new approach for the measurement of oxygen reduction and superoxide generation in cellular systems.
Collapse
Affiliation(s)
- V Roubaud
- Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland 21224, USA
| | | | | | | | | |
Collapse
|
24
|
Li Y, Zhu H, Kuppusamy P, Roubaud V, Zweier JL, Trush MA. Validation of lucigenin (bis-N-methylacridinium) as a chemilumigenic probe for detecting superoxide anion radical production by enzymatic and cellular systems. J Biol Chem 1998; 273:2015-23. [PMID: 9442038 DOI: 10.1074/jbc.273.4.2015] [Citation(s) in RCA: 404] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Lucigenin is most noted for its wide use as a chemiluminescent detector of superoxide anion radical (O2-.) production by biological systems. However, its validity as a O2-.-detecting probe has recently been questioned in view of its ability to undergo redox cycling in several in vitro enzymatic systems, which produce little or no O2-.. Whether and to what extent lucigenin redox cycling occurs in systems that produce significant amounts of O2-. has not been carefully investigated. We examined and correlated three end points, including sensitive measurement of lucigenin-derived chemiluminescence (LDCL), O2 consumption by oxygen polarography, and O2-. production by 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline-N-oxide spin trapping to characterize the potential of lucigenin to undergo redox cycling and as such to act as an additional source of O2-. in various enzymatic and cellular systems. Marked LDCL was elicited at lucigenin concentrations ranging from 1 to 5 microM in all of the O2-.-generating systems examined, including xanthine oxidase (XO)/xanthine, lipoamide dehydrogenase/ NADH, isolated mitochondria, mitochondria in intact cells, and phagocytic NADPH oxidase. These concentrations of lucigenin were far below those that stimulated additional O2 consumption or O2-. production in the above systems. Moreover, a significant linear correlation between LDCL and superoxide dismutase-inhibitable cytochrome c reduction was observed in the XO/ xanthine and phagocytic NADPH oxidase systems. In contrast to the above O2-.-generating systems, no LDCL was observed at non-redox cycling concentrations of lucigenin in the glucose oxidase/glucose and XO/NADH systems, which do not produce a significant amount of O2-.. Thus, LDCL still appears to be a valid probe for detecting O2-. production by enzymatic and cellular sources.
Collapse
Affiliation(s)
- Y Li
- Department of Environmental Health Sciences, Johns Hopkins, University School of Hygiene and Public Health, Baltimore, Maryland 21205, USA
| | | | | | | | | | | |
Collapse
|
25
|
Roubaud V, Sankarapandi S, Kuppusamy P, Tordo P, Zweier JL. Quantitative measurement of superoxide generation using the spin trap 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline-N-oxide. Anal Biochem 1997; 247:404-11. [PMID: 9177705 DOI: 10.1006/abio.1997.2067] [Citation(s) in RCA: 142] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Measurement and quantitation of superoxide by electron paramagnetic resonance (EPR) using the spin trap 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) have been limited by the short half-life of the superoxide adduct DMPO-OOH (approximately 50 s at pH 7). Recently a beta-phosphorylated nitrone, 5-(diethoxyphosphoryl)-5-methyl-1-pyrroline-N-oxide (DEPMPO), was developed and reported to form a more stable superoxide adduct with a half-life of approximately 15 min. We evaluated the use of DEPMPO for quantitative measurement of superoxide in chemical and biochemical systems. To estimate the efficiency of trapping, EPR oximetry was used to measure oxygen consumption and the intensity of the DEPMPO-OOH signal to measure superoxide generation and adduct decay. With the superoxide-generating systems, riboflavin/light and xanthine/xanthine oxidase, DEPMPO trapped approximately 65% of the superoxide produced. The efficiency of superoxide trapping by DEPMPO was compared to the commonly used cytochrome c reduction method. When superoxide production was > 20 microM, cytochrome c detected approximately 100% of the superoxide produced, while DEPMPO trapped 60 to 70%. However, EPR detection with DEPMPO was 40-fold more sensitive than cytochrome c. Thus, DEPMPO is an efficient spin trap which enables specific and sensitive detection and quantitation of superoxide generation.
Collapse
Affiliation(s)
- V Roubaud
- Department of Medicine, Johns Hopkins Medical Institutions, Baltimore, Maryland 21224, USA
| | | | | | | | | |
Collapse
|
26
|
Roubaud V, Mercier A, Olive G, Le Moigne F, Tordo P. 5-(Diethoxyphosphorylmethyl)-5-methyl-4,5-dihydro-3H-pyrrole N-oxide: synthesis and evaluation of spin trapping properties. ACTA ACUST UNITED AC 1997. [DOI: 10.1039/a608510e] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Roubaud V, Moigne FL, Mercier A, Tordo P. An Improved Reduction Procedure in the Synthesis of Substituted Pyrrolidines via An Aminomercuration/Reduction Sequence of Primary Alkenylamines. SYNTHETIC COMMUN 1996. [DOI: 10.1080/00397919608003517] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
28
|
Roubaud V, Lauricella R, Tuccio B, Bouteiller JC, Tordo P. Decay of superoxide spin adducts of new PBN-type phosphorylated nitrones. Res Chem Intermed 1996. [DOI: 10.1163/156856796x00098] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
29
|
Roubaud V, Moigne FL, Mercier A, Tordo P. SYNTHESIS OF DIALKYL (PYRROLIDIN-2-YL)-PHOSPHONATES BY MERCURIC ACETATE PROMOTED CYCLIZATION OF α-AMINOALKENYLPHOSPHONATES. REGIO AND STEREOCHEMICAL ASPECTS. PHOSPHORUS SULFUR 1994. [DOI: 10.1080/10426509408018386] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|