1
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Harnedy J, Maashi HA, El Gehani AAMA, Burns M, Morrill LC. Deconstructive Functionalization of Unstrained Cycloalkanols via Electrochemically Generated Aromatic Radical Cations. Org Lett 2023; 25:1486-1490. [PMID: 36847269 PMCID: PMC10012273 DOI: 10.1021/acs.orglett.3c00219] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Abstract
Herein we report an electrochemical approach for the deconstructive functionalization of cycloalkanols, where various alcohols, carboxylic acids, and N-heterocycles are employed as nucleophiles. The method has been demonstrated across a broad range of cycloalkanol substrates, including various ring sizes and substituents, to access useful remotely functionalized ketone products (36 examples). The method was demonstrated on a gram scale via single-pass continuous flow, which exhibited increased productivity in relation to the batch process.
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Affiliation(s)
- James Harnedy
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Hussain A Maashi
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Albara A M A El Gehani
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
| | - Matthew Burns
- Chemical Development, Pharmaceutical Technology & Development, Operations, AstraZeneca, Macclesfield SK10 2NA, U.K
| | - Louis C Morrill
- Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff CF10 3AT, U.K
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2
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Fried AD, Wilson BJ, Galan NJ, Brantley JN. Electroediting of Soft Polymer Backbones. J Am Chem Soc 2022; 144:8885-8891. [PMID: 35576583 DOI: 10.1021/jacs.2c02098] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Synthetic methods that edit soft polymer backbones are critical technologies for tailoring the structures and properties of macromolecules. Developing strategies that leverage underexplored reaction manifolds are vital for accessing new chemical (and functional) space in soft materials. Here, we report a mild electrochemical approach that enables both degradation and functionalization of synthetic polymers. We found that bulk electrolysis (under either homogeneous or heterogeneous conditions) promoted facile, chemoselective chain scission in a variety of olefin-containing materials. Polymer degradation could also be coupled with functionalization (e.g., azidation) to afford new species that could serve as macromonomers.
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Affiliation(s)
- Alan D Fried
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Breana J Wilson
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Nicholas J Galan
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
| | - Johnathan N Brantley
- Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, United States
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3
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Bonesi SM, Protti S, Capucciati A, Fagnoni M. Photogenerated aryl mesylate and aryl diethyl phosphate radical cations: a time-resolved spectroscopy investigation. NEW J CHEM 2022. [DOI: 10.1039/d2nj01755e] [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]
Abstract
The photoinduced electron transfer reaction of selected aryl sulfonates and phosphates with K2S2O8 in a MeCN water (9 : 1) mixture has been investigated by LFP experiments.
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Affiliation(s)
- Sergio M. Bonesi
- PhotoGreen Lab, Department of Chemistry, University of Pavia, V.leTaramelli 12, 27100, Pavia, Italy
- Universidad de Buenos Aires, Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Ciudad Universitaria, Buenos Aires, C1428EGA, Argentina
- CONICET—Universidad de Buenos Aires, Centro de Investigaciones en Hidratos de Carbono (CIHIDECAR), Ciudad Universitaria, Buenos Aires, C1428EGA, Argentina
| | - Stefano Protti
- PhotoGreen Lab, Department of Chemistry, University of Pavia, V.leTaramelli 12, 27100, Pavia, Italy
| | | | - Maurizio Fagnoni
- PhotoGreen Lab, Department of Chemistry, University of Pavia, V.leTaramelli 12, 27100, Pavia, Italy
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4
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Sulfur Radicals and Their Application. Top Curr Chem (Cham) 2018; 376:22. [DOI: 10.1007/s41061-018-0197-0] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/11/2018] [Indexed: 12/11/2022]
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5
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Bonesi SM, Crespi S, Merli D, Manet I, Albini A. Direct Irradiaton of Aryl Sulfides: Homolytic Fragmentation and Sensitized S-Oxidation. J Org Chem 2017; 82:9054-9065. [DOI: 10.1021/acs.joc.7b01518] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sergio M. Bonesi
- Departamento
de Química Orgánica, CIHIDECAR − CONICET, 3er
Piso, Pabellón 2, Ciudad Universitaria, FCEyN, University of Buenos Aires, Buenos
Aires 1428, Argentina
- PhotoGreen Lab, Department of Chemistry, V.le Taramelli 12, 27100 Pavia, Italy
| | - Stefano Crespi
- PhotoGreen Lab, Department of Chemistry, V.le Taramelli 12, 27100 Pavia, Italy
| | - Daniele Merli
- Department of Chemistry, V.le Taramelli
12, 27100 Pavia, Italy
| | - Ilse Manet
- ISOF-CNR, via Gobetti 101, 40129 Bologna, Italy
| | - Angelo Albini
- PhotoGreen Lab, Department of Chemistry, V.le Taramelli 12, 27100 Pavia, Italy
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6
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Wang X, Wang S, Gu C, Zhang W, Zheng H, Zhang J, Lu G, Zhang YM, Li M, Zhang SXA. Reversible Bond/Cation-Coupled Electron Transfer on Phenylenediamine-Based Rhodamine B and Its Application on Electrochromism. ACS APPLIED MATERIALS & INTERFACES 2017; 9:20196-20204. [PMID: 28535036 DOI: 10.1021/acsami.7b03199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A biomimetic system on reversible bond-coupled electron transfer (BCET) has been proposed and investigated in a switchable Rh-N molecule with redox active subunits. We discover that energy barrier of C-N bond breaking is reduced dramatically to less than 1/7 (from 40.4 to 5.5 kcal/mol), and 1/3 of the oxidation potential is simultaneously lowered (from 0.67 to 0.43 V) with the oxidation of Rh-N. The concept, cation-coupled electron transfer (CCET), is highly recommended by analyzing existing proton coupled electron transfer (PCET) and metal coupled electron transfer (MCET) along with aforementioned BCET, which have same characteristic of transferring positive charges, such as proton, metal ion, and organic cation. Molecular switch can be controlled directly by electricity through BCET process. Solid electrochromic device was fabricated with extremely high coloration efficiency (720 cm2/C), great reversibility (no degradation for 600 cycles), and quick respond time (30 ms).
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Affiliation(s)
- Xiaojun Wang
- State Key Lab of Supramolecular Structure and Materials, Jilin University , Changchun, 130012, P. R. China
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Shuo Wang
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Chang Gu
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Weiran Zhang
- State Key Lab of Supramolecular Structure and Materials, Jilin University , Changchun, 130012, P. R. China
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Hongzhi Zheng
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Jingjing Zhang
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Geyu Lu
- College of Electron Science and Engineering, Jilin University , Changchun 130012, P. R. China
| | - Yu-Mo Zhang
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Minjie Li
- State Key Lab of Supramolecular Structure and Materials, Jilin University , Changchun, 130012, P. R. China
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
| | - Sean Xiao-An Zhang
- State Key Lab of Supramolecular Structure and Materials, Jilin University , Changchun, 130012, P. R. China
- College of Chemistry, Jilin University , Changchun, 130012, P. R. China
- Department of Chemistry and Pharmacy, Zhuhai College of Jilin University , Zhuhai, 519041, P. R. China
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7
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Lipp B, Lipp A, Detert H, Opatz T. Light-Induced Alkylation of (Hetero)aromatic Nitriles in a Transition-Metal-Free C–C-Bond Metathesis. Org Lett 2017; 19:2054-2057. [DOI: 10.1021/acs.orglett.7b00652] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Benjamin Lipp
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Alexander Lipp
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Heiner Detert
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
| | - Till Opatz
- Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, D-55128 Mainz, Germany
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8
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Barbieri A, Di Stefano S, Lanzalunga O, Lapi A, Mazzonna M, Olivo G. Role of electron transfer processes in the oxidation of aryl sulfides catalyzed by nonheme iron complexes. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2016.1255623] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Alessia Barbieri
- Dipartimento di Chimica, Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Stefano Di Stefano
- Dipartimento di Chimica, Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica, Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Andrea Lapi
- Dipartimento di Chimica, Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Marco Mazzonna
- Dipartimento di Chimica, Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
| | - Giorgio Olivo
- Dipartimento di Chimica, Sapienza Università di Roma and Istituto CNR di Metodologie Chimiche (IMC-CNR), Sezione Meccanismi di Reazione, c/o Dipartimento di Chimica, Sapienza Università di Roma, Rome, Italy
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9
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Nakajima K, Nojima S, Sakata K, Nishibayashi Y. Visible‐Light‐Mediated Aromatic Substitution Reactions of Cyanoarenes with 4‐Alkyl‐1,4‐dihydropyridines through Double Carbon–Carbon Bond Cleavage. ChemCatChem 2016. [DOI: 10.1002/cctc.201600037] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kazunari Nakajima
- Institute of Engineering Innovation School of Engineering The University of Tokyo, Yayoi, Bunkyo-ku Tokyo 113-8656 Japan
| | - Sunao Nojima
- Institute of Engineering Innovation School of Engineering The University of Tokyo, Yayoi, Bunkyo-ku Tokyo 113-8656 Japan
| | - Ken Sakata
- Faculty of Pharmaceutical Sciences Hoshi University, Ebara, Shinagawa-ku Tokyo 142-8501 Japan
| | - Yoshiaki Nishibayashi
- Institute of Engineering Innovation School of Engineering The University of Tokyo, Yayoi, Bunkyo-ku Tokyo 113-8656 Japan
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10
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Bettoni M, Del Giacco T, Stradiotto M, Elisei F. Photoinduced One-Electron Oxidation of Benzyl Methyl Sulfides in Acetonitrile: Time-Resolved Spectroscopic Evidence for a Thionium Ion Intermediate. J Org Chem 2015; 80:8001-8. [DOI: 10.1021/acs.joc.5b01052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marta Bettoni
- Dipartimento
di Ingegneria Civile ed Ambientale, ‡Dipartimento di Chimica, Biologia
e Biotecnologie, and §Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, 06123 Perugia, Italy
| | - Tiziana Del Giacco
- Dipartimento
di Ingegneria Civile ed Ambientale, ‡Dipartimento di Chimica, Biologia
e Biotecnologie, and §Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, 06123 Perugia, Italy
| | - Marina Stradiotto
- Dipartimento
di Ingegneria Civile ed Ambientale, ‡Dipartimento di Chimica, Biologia
e Biotecnologie, and §Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, 06123 Perugia, Italy
| | - Fausto Elisei
- Dipartimento
di Ingegneria Civile ed Ambientale, ‡Dipartimento di Chimica, Biologia
e Biotecnologie, and §Centro di Eccellenza Materiali Innovativi Nanostrutturati (CEMIN), Università di Perugia, 06123 Perugia, Italy
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11
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Oksdath-Mansilla G, Hajj V, Andrada DM, Argüello JE, Bonin J, Robert M, Peñéñory AB. Photoremoval of Protecting Groups: Mechanistic Aspects of 1,3-Dithiane Conversion to a Carbonyl Group. J Org Chem 2015; 80:2733-9. [DOI: 10.1021/jo502953t] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Gabriela Oksdath-Mansilla
- INFIQC−CONICET-UNC,
Departmento de Química Orgánica, Facultad de Ciencias
Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - Viviane Hajj
- Laboratoire
d’Electrochimie Moléculaire, Unité Mixte de Recherche
Université - CNRS No 7591, Université Paris Diderot, Sorbonne Paris Cité, Bâtiment Lavoisier, 15 rue Jean Antoine
de Baïf, 75205 Paris Cedex 13, France
| | - Diego M. Andrada
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35032 Marburg, Germany
| | - Juan E. Argüello
- INFIQC−CONICET-UNC,
Departmento de Química Orgánica, Facultad de Ciencias
Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
| | - Julien Bonin
- Laboratoire
d’Electrochimie Moléculaire, Unité Mixte de Recherche
Université - CNRS No 7591, Université Paris Diderot, Sorbonne Paris Cité, Bâtiment Lavoisier, 15 rue Jean Antoine
de Baïf, 75205 Paris Cedex 13, France
| | - Marc Robert
- Laboratoire
d’Electrochimie Moléculaire, Unité Mixte de Recherche
Université - CNRS No 7591, Université Paris Diderot, Sorbonne Paris Cité, Bâtiment Lavoisier, 15 rue Jean Antoine
de Baïf, 75205 Paris Cedex 13, France
| | - Alicia B. Peñéñory
- INFIQC−CONICET-UNC,
Departmento de Química Orgánica, Facultad de Ciencias
Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, X5000HUA Córdoba, Argentina
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12
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Cyr D, Das P. Kinetics of C–C and C–H Bond Cleavage in Phenyl Alkane Radical Cations Generated by Photoinduced Electron Transfer. J Phys Chem A 2014; 118:11155-67. [DOI: 10.1021/jp508556z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Douglas Cyr
- Physical
Sciences Department, Cameron University, Lawton, Oklahoma 73505, United States
| | - Paritosh Das
- Physical
Sciences Department, Cameron University, Lawton, Oklahoma 73505, United States
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13
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Akopova AR, Morkovnik AS, Khrustalev VN, Bicherov AV. Electron transfer in the peroxytrifluoroacetic acid-assisted sulfoxidation and oxidative destruction of benzhydryl sulfides. Russ Chem Bull 2014. [DOI: 10.1007/s11172-013-0159-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Qrareya H, Ravelli D, Fagnoni M, Albini A. Decatungstate Photocatalyzed Benzylation of Alkenes with Alkylaromatics. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300598] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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15
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Dockheer SM, Gubler L, Koppenol WH. Reactions of the tetraoxidosulfate(˙-) and hydroxyl radicals with poly(sodium α-methylstyrene sulfonate). Phys Chem Chem Phys 2013; 15:4975-83. [PMID: 23443676 DOI: 10.1039/c3cp44341h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Poly(α-methylstyrene sulfonic acid) (PAMS) represents a class of polymers that can form the protogenic constituent in electrolyte membranes for fuel cells. Oxidative stress is thought to play an important role in the degradation of the fuel cell membranes. Having previously established that damage may be mediated via abstraction of a benzylic hydrogen, we examined model compounds similar to those used before, but with a methyl group at the α-position. We studied the reaction of HO˙ and SO4(˙-), generated by pulse radiolysis, with model compounds in aqueous solution, and measured k = (2 ± 0.5) × 10(10) M(-1) s(-1) and (2 - 3) × 10(10) M(-1) s(-1) for the reaction of HO˙ with PAMS with average molecular weights of 2640 Da (PAMS-2640) and 6440 Da (PAMS-6440), respectively, at room temperature. At low pH, the decay of the hydroxycyclohexadienyl radical thus formed is accompanied by the formation of an absorption band in the visible region of the spectrum, which we tentatively assign to the radical cation of PAMS-2640 and -6440. The radical cation of PAMS-2640, formed by the reaction of SO4(˙-) with k = (6 ± 1) × 10(8) M(-1) s(-1), has a local absorption maximum at 560 nm, with ε560 ≥ 1400 M(-1) cm(-1). For the reaction of HO˙ and SO4(˙-) with the model compound benzenesulfonate, we measured k = (4-5) × 10(9) M(-1) s(-1) and (1.0 ± 0.3) × 10(8) M(-1) s(-1), respectively, while the reaction of SO4(˙-) with PAMS-6440 proceeds with (0.8-1) × 10(9) M(-1) s(-1). The 4-sulfophenoxyl radical was generated via the reaction of N3˙ with 4-hydroxybenzenesulfonate; ε410 ≥ 2300 M(-1) cm(-1). Not unexpectedly, the radical cation of PAMS is longer-lived than that of polystyrene sulfonic acid. Furthermore, fragmentation may result in desulfonation.
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Affiliation(s)
- Sindy M Dockheer
- Institute of Inorganic Chemistry, Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Zurich, Switzerland
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16
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Affiliation(s)
- Osvaldo Lanzalunga
- a Dipartimento di Chimica, Università di Roma “La Sapienza” and Istituto CNR di Metodologie Chimiche (IMC-CNR) , Sezione Meccanismi di Reazione , P.le Aldo Moro 5, Rome , Italy
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17
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Cavattoni T, Del Giacco T, Lanzalunga O, Mazzonna M, Mencarelli P. Structural Effects on the C–S Bond Cleavage in Aryl tert-Butyl Sulfoxide Radical Cations. J Org Chem 2013; 78:4886-94. [DOI: 10.1021/jo400461c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Tullio Cavattoni
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Tiziana Del Giacco
- Dipartimento di Chimica and
Centro di Eccellenza Materiali Innovativi Nanostrutturati, Università di Perugia, via Elce di Sotto 8,
06123 Perugia, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Marco Mazzonna
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Paolo Mencarelli
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
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18
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Miyake Y, Nakajima K, Nishibayashi Y. Visible light-mediated oxidative decarboxylation of arylacetic acids into benzyl radicals: addition to electron-deficient alkenes by using photoredox catalysts. Chem Commun (Camb) 2013; 49:7854-6. [DOI: 10.1039/c3cc44438d] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Šakić D, Achrainer F, Vrček V, Zipse H. The chemical fate of paroxetine metabolites. Dehydration of radicals derived from 4-(4-fluorophenyl)-3-(hydroxymethyl)piperidine. Org Biomol Chem 2013; 11:4232-9. [DOI: 10.1039/c3ob40219c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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20
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Del Giacco T, Lanzalunga O, Mazzonna M, Mencarelli P. Structural and Solvent Effects on the C–S Bond Cleavage in Aryl Triphenylmethyl Sulfide Radical Cations. J Org Chem 2012; 77:1843-52. [DOI: 10.1021/jo202418d] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Tiziana Del Giacco
- Dipartimento di Chimica and
Centro di Eccellenza Materiali Innovativi Nanostrutturati, Università di Perugia, via Elce di Sotto 8,
06123 Perugia, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Marco Mazzonna
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Paolo Mencarelli
- Dipartimento di Chimica and
Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione
c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
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21
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Baciocchi E, Bettoni M, Del Giacco T, Lanzalunga O, Mazzonna M, Mencarelli P. Structure and C−S Bond Cleavage in Aryl 1-Methyl-1-arylethyl Sulfide Radical Cations. J Org Chem 2010; 76:573-82. [DOI: 10.1021/jo102086f] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Enrico Baciocchi
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università di Roma La Sapienza, P.le A. Moro 5, 00185 Rome, Italy
| | - Marta Bettoni
- Dipartimento di Chimica and Centro di Eccellenza Materiali Innovativi Nanostrutturati, Università di Perugia, via Elce di Sotto 8, 06123 Perugia, Italy
| | - Tiziana Del Giacco
- Dipartimento di Chimica and Centro di Eccellenza Materiali Innovativi Nanostrutturati, Università di Perugia, via Elce di Sotto 8, 06123 Perugia, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università di Roma La Sapienza, P.le A. Moro 5, 00185 Rome, Italy
| | - Marco Mazzonna
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università di Roma La Sapienza, P.le A. Moro 5, 00185 Rome, Italy
| | - Paolo Mencarelli
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Università di Roma La Sapienza, P.le A. Moro 5, 00185 Rome, Italy
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Unprecedented copper(I)-catalyzed photochemical reaction of diethyl ether with vicinal diols and ketals. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2010.06.080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Lechner R, Kümmel S, König B. Visible light flavin photo-oxidation of methylbenzenes, styrenes and phenylacetic acids. Photochem Photobiol Sci 2010; 9:1367-77. [DOI: 10.1039/c0pp00202j] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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24
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Ichikawa T. Molecular design for novel radiation resist decomposable by electron detachment. Radiat Phys Chem Oxf Engl 1993 2009. [DOI: 10.1016/j.radphyschem.2009.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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25
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Baciocchi E, Lanzalunga O, Lapi A, Maggini L. Stereochemistry of the C−S Bond Cleavage in cis-2-Methylcyclopentyl Phenyl Sulfoxide Radical Cation. J Org Chem 2009; 74:1805-8. [DOI: 10.1021/jo802619y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Enrico Baciocchi
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Osvaldo Lanzalunga
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Andrea Lapi
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
| | - Laura Maggini
- Dipartimento di Chimica and Istituto CNR di Metodologie Chimiche-IMC, Sezione Meccanismi di Reazione c/o Dipartimento di Chimica, Sapienza Università di Roma, P.le A. Moro 5, 00185 Rome, Italy
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26
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Mincher BJ, Mezyk SP. Radiation chemical effects on radiochemistry: A review of examples important to nuclear power. RADIOCHIM ACTA 2009. [DOI: 10.1524/ract.2009.1646] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Mincher BJ, Modolo G, Mezyk SP. Review Article: The Effects of Radiation Chemistry on Solvent Extraction: 1. Conditions in Acidic Solution and a Review of TBP Radiolysis. SOLVENT EXTRACTION AND ION EXCHANGE 2009. [DOI: 10.1080/07366290802544767] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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28
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Houmam A. Electron Transfer Initiated Reactions: Bond Formation and Bond Dissociation. Chem Rev 2008; 108:2180-237. [PMID: 18620366 DOI: 10.1021/cr068070x] [Citation(s) in RCA: 199] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Bonesi SM, Fagnoni M, Albini A. Photosensitized Electron Transfer Oxidation of Sulfides: A Steady-State Study. European J Org Chem 2008. [DOI: 10.1002/ejoc.200800048] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Bietti M, Capone A. One-electron oxidation of 2-(4-methoxyphenyl)-2-methylpropanoic and 1-(4-methoxyphenyl)cyclopropanecarboxylic acids in aqueous solution. the involvement of radical cations and the influence of structural effects and pH on the side-chain fragmentation reactivity. J Org Chem 2008; 73:618-29. [PMID: 18076187 DOI: 10.1021/jo702104j] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A product and time-resolved kinetic study on the one-electron oxidation of 2-(4-methoxyphenyl)-2-methylpropanoic acid (2), 1-(4-methoxyphenyl)cyclopropanecarboxylic acid (3), and of the corresponding methyl esters (substrates 4 and 5, respectively) has been carried out in aqueous solution. With 2, no direct evidence for the formation of an intermediate radical cation 2*+ but only of the decarboxylated 4-methoxycumyl radical has been obtained, indicating either that 2*+ is not formed or that its decarboxylation is too fast to allow detection under the experimental conditions employed (k > 1 x 10(7) s(-1)). With 3, oxidation leads to the formation of the corresponding radical cation 3*+ or radical zwitterion -3*+ depending on pH. At pH 1.0 and 6.7, 3*+ and -3*+ have been observed to undergo decarboxylation as the exclusive side-chain fragmentation pathway with rate constants k = 4.6 x 10(3) and 2.3 x 10(4) s(-1), respectively. With methyl esters 4 and 5, direct evidence for the formation of the corresponding radical cations 4*+ and 5*+ has been obtained. Both radical cations have been observed to display a very low reactivity and an upper limit for their decay rate constants has been determined as k < 10(3) s(-1). Comparison between the one-electron oxidation reactions of 2 and 3 shows that the replacement of the C(CH3)2 moiety with a cyclopropyl group determines a decrease in decarboxylation rate constant of more than 3 orders of magnitude. This large difference in reactivity has been qualitatively explained in terms of three main contributions: substrate oxidation potential, stability of the carbon-centered radical formed after decarboxylation, and stereoelectronic effects. In basic solution, -3*+ and 5*+ have been observed to react with -OH in a process that is assigned to the -OH-induced ring-opening of the cyclopropane ring, and the corresponding second-order rate constants (k-OH) have been obtained. With -3*+, competition between decarboxylation and -OH-induced cyclopropane ring-opening is observed at pH >or=10, with the latter process that becomes the major fragmentation pathway around pH 12.
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Affiliation(s)
- Massimo Bietti
- Dipartimento di Scienze e Tecnologie Chimiche, Università Tor Vergata, Via della Ricerca Scientifica 1, I-00133 Rome, Italy.
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Bettoni M, Rol C, Sebastiani GV. Photoelectrochemistry on TiO2/Ti anodes as a tool to increase the knowledge about some photo-oxidation mechanisms in CH3CN. J PHYS ORG CHEM 2008. [DOI: 10.1002/poc.1303] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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32
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Yu A, Liu Y, Li Z, Cheng JP. Computation of pKaValues of Substituted Aniline Radical Cations in Dimethylsulfoxide Solution. J Phys Chem A 2007; 111:9978-87. [PMID: 17760427 DOI: 10.1021/jp072456+] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A newly developed computation strategy was used to calculate the absolute pKa values of 18 substituted aniline radical cations in dimethylsulfoxide (DMSO) solution with the error origin elucidated and deviation minimized. The B3LYP/6-311++G(2df,2p) method was applied and was found to be capable of reproducing the gas-phase proton-transfer free energies of substituted anilines with a precision of 0.83 kcal/mol. The IEF-PCM solvation model with gas-phase optimized structures was adopted in calculating the pKa values of the substituted neutral anilines in DMSO, regenerating the experimental results within a standard deviation of 0.4 pKa unit. When the IEF-PCM solvation model was applied to calculate the standard redox potentials of anilide anions, it showed that the computed values agreed well with experiment, but the redox potentials of substituted anilines were systematically overestimated by 0.304 eV. The cause of this deviation was found to be related to the inaccuracy of the calculated solvation free energies of aniline radical cations. By adjusting the size of the cavity in the IEF-PCM method, we derived a reliable procedure that can reproduce the experimental pKa values of aniline radical cations within 1.2 pKa units to those from experiment.
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Affiliation(s)
- Ao Yu
- College of Chemistry, Nankai University, State Key Laboratory of Elemento-organic Chemistry, Tianjin 300071, China
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