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Abadie B, Jardel D, Pozzi G, Toullec P, Vincent JM. Dual Benzophenone/Copper-Photocatalyzed Giese-Type Alkylation of C(sp 3 )-H Bonds. Chemistry 2019; 25:16120-16127. [PMID: 31595555 DOI: 10.1002/chem.201904111] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Indexed: 01/24/2023]
Abstract
Photocatalyzed Giese-type alkylations of C(sp3 )-H bonds are very attractive reactions in the context of atom-economy in C-C bond formation. The main limitation of such reactions is that when using highly polymerizable olefin acceptors, such as unsubstituted acrylates, acrylonitrile, or methyl vinyl ketone, radical polymerization often becomes the dominant or exclusive reaction pathway. Herein, we report that the polymerization of such olefins is strongly limited or suppressed when combining the photocatalytic activity of benzophenone (BP) with a catalytic amount of Cu(OAc)2 . Under mild and operationally simple conditions, the Giese adducts resulting from the C(sp3 )-H functionalization of amines, alcohols, ethers, and cycloalkanes could be synthesized. Preliminary mechanistic studies have revealed that the reaction does not proceed through a radical chain, but through a dual BP/Cu photocatalytic process, in which both CuII and low-valent CuI/0 species, generated in situ by reduction by the BP ketyl radical, may react with α-keto or α-cyano intermediate radicals, thus preventing polymerization.
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Affiliation(s)
- Baptiste Abadie
- Institut des Sciences Moléculaires, CNRS UMR5255, Université Bordeaux, 33405, Talence, France
| | - Damien Jardel
- Institut des Sciences Moléculaires, CNRS UMR5255, Université Bordeaux, 33405, Talence, France
| | - Gianluca Pozzi
- CNR-Istituto di Scienze e Tecnologie Molecolari (ISTM), via Golgi 19, 20133, Milano, Italy
| | - Patrick Toullec
- Institut des Sciences Moléculaires, CNRS UMR5255, Université Bordeaux, 33405, Talence, France
| | - Jean-Marc Vincent
- Institut des Sciences Moléculaires, CNRS UMR5255, Université Bordeaux, 33405, Talence, France
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C–H Activation via Radical Processes Using Photo-Excited Ketones. TOPICS IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1007/7081_2017_15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Capaldo L, Ravelli D. Hydrogen Atom Transfer (HAT): A Versatile Strategy for Substrate Activation in Photocatalyzed Organic Synthesis. European J Org Chem 2017; 2017:2056-2071. [PMID: 30147436 PMCID: PMC6099384 DOI: 10.1002/ejoc.201601485] [Citation(s) in RCA: 391] [Impact Index Per Article: 55.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Indexed: 11/05/2022]
Abstract
The adoption of hydrogen atom transfer (HAT) in a photocatalytic approach, in which an excited catalyst is responsible for substrate activation, offers unique opportunities in organic synthesis, enabling the straightforward activation of R-H (R = C, Si, S) bonds in desired reagents. Either a direct strategy, based on the intrinsic reactivity of a limited number of photocatalysts in the excited state, or an indirect one, in which a photocatalytic cycle is used for the generation of a thermal hydrogen abstractor, can be exploited. This microreview summarizes the most recent advances (mainly from the last two years) in this rapidly developing area of research, collecting the selected examples according to the nature of the species promoting the HAT process. From the synthetic point of view, this area has led to the development of a plethora of strategies for C-C, C-Si, C-N, C-S, and C-halogen (particularly, fluorine) bond formation, as well as for oxidation reactions.
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Affiliation(s)
- Luca Capaldo
- PhotoGreen Lab Department of Chemistry University of Pavia Viale Taramelli 12 27100 Pavia Italy
| | - Davide Ravelli
- PhotoGreen Lab Department of Chemistry University of Pavia Viale Taramelli 12 27100 Pavia Italy
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Beniazza R, Abadie B, Remisse L, Jardel D, Lastécouères D, Vincent JM. Light-promoted metal-free cross dehydrogenative couplings on ethers mediated by NFSI: reactivity and mechanistic studies. Chem Commun (Camb) 2017; 53:12708-12711. [DOI: 10.1039/c7cc05854c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cross dehydrogenative couplings on ethers are performed very effectively in a one-pot process using NFSI as oxidizing agent under low-intensity UVA irradiation in the presence of 2 mol% benzophenone.
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Affiliation(s)
- Redouane Beniazza
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- Univ. Bordeaux
- Talence 33405
- France
| | - Baptiste Abadie
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- Univ. Bordeaux
- Talence 33405
- France
| | - Lionel Remisse
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- Univ. Bordeaux
- Talence 33405
- France
| | - Damien Jardel
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- Univ. Bordeaux
- Talence 33405
- France
| | | | - Jean-Marc Vincent
- Institut des Sciences Moléculaires
- CNRS UMR 5255
- Univ. Bordeaux
- Talence 33405
- France
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Kamijo S, Kamijo K, Maruoka K, Murafuji T. Aryl Ketone Catalyzed Radical Allylation of C(sp3)–H Bonds under Photoirradiation. Org Lett 2016; 18:6516-6519. [DOI: 10.1021/acs.orglett.6b03586] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Shin Kamijo
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Kaori Kamijo
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Kiyotaka Maruoka
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Toshihiro Murafuji
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
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Kamijo S, Takao G, Kamijo K, Tsuno T, Ishiguro K, Murafuji T. Alkylation of Nonacidic C(sp3)–H Bonds by Photoinduced Catalytic Michael-Type Radical Addition. Org Lett 2016; 18:4912-4915. [DOI: 10.1021/acs.orglett.6b02391] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shin Kamijo
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Go Takao
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Kaori Kamijo
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Teruo Tsuno
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Katsuya Ishiguro
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Toshihiro Murafuji
- Graduate School of Sciences and Technology for Innovation and ‡Department of
Biology and Chemistry, Yamaguchi University, Yamaguchi 753-8512, Japan
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Kamijo S, Takao G, Kamijo K, Hirota M, Tao K, Murafuji T. Photo-induced Substitutive Introduction of the Aldoxime Functional Group to Carbon Chains: A Formal Formylation of Non-Acidic C(sp3
)−H Bonds. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603810] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Shin Kamijo
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Go Takao
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Kaori Kamijo
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Masaki Hirota
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Keisuke Tao
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Toshihiro Murafuji
- Graduate School of Medicine; Yamaguchi University; Yamaguchi 753-8512 Japan
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Kamijo S, Takao G, Kamijo K, Hirota M, Tao K, Murafuji T. Photo-induced Substitutive Introduction of the Aldoxime Functional Group to Carbon Chains: A Formal Formylation of Non-Acidic C(sp3
)−H Bonds. Angew Chem Int Ed Engl 2016; 55:9695-9. [DOI: 10.1002/anie.201603810] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2016] [Revised: 06/06/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Shin Kamijo
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Go Takao
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Kaori Kamijo
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Masaki Hirota
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Keisuke Tao
- Graduate School of Science and Engineering and Graduate School of Sciences and Technology for Innovation; Yamaguchi University; Yamaguchi 753-8512 Japan
| | - Toshihiro Murafuji
- Graduate School of Medicine; Yamaguchi University; Yamaguchi 753-8512 Japan
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Itoh K, Kato R, Kinugawa D, Kamiya H, Kudo R, Hasegawa M, Fujii H, Suga H. Photochemically-induced C-C bond formation between tertiary amines and nitrones. Org Biomol Chem 2015. [PMID: 26205235 DOI: 10.1039/c5ob01277e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoexcited nitrones serve as excellent electron acceptors as well as radical acceptors in the presence of tertiary amines to give β-amino hydroxylamines via photochemically-induced direct sp(3) C-H functionalization of the tertiary amines. The combined use of an organophotosensitizer and photoirradiation was highly effective in accelerating addition reactions. Several nitrones and tertiary amines were successfully utilized to give β-amino hydroxylamines in good yield. Highly regioselective generation of primary α-aminoalkyl radicals based on Lewis's stereoelectronic rule and diastereoselective addition reactions of primary α-aminoalkyl radicals with nitrones were successfully achieved. Furthermore, a highly diastereoselective reaction of an α-aminoalkyl radical with a chiral (E)-geometry-fixed α-alkoxycarbonylnitrone was performed.
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Affiliation(s)
- Kennosuke Itoh
- Department of Medicinal Chemistry, School of Pharmacy, Kitasato University, 5-9-1 Shirokane, Minato-ku, Tokyo 108-8641, Japan.
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Kamijo S, Tao K, Takao G, Tonoda H, Murafuji T. Photoinduced Oxidation of Secondary Alcohols Using 4-Benzoylpyridine as an Oxidant. Org Lett 2015; 17:3326-9. [DOI: 10.1021/acs.orglett.5b01550] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shin Kamijo
- Graduate School of Science and Engineering, ‡Department of Biology and Chemistry, and §Graduate School
of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Keisuke Tao
- Graduate School of Science and Engineering, ‡Department of Biology and Chemistry, and §Graduate School
of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Go Takao
- Graduate School of Science and Engineering, ‡Department of Biology and Chemistry, and §Graduate School
of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Hiroshi Tonoda
- Graduate School of Science and Engineering, ‡Department of Biology and Chemistry, and §Graduate School
of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
| | - Toshihiro Murafuji
- Graduate School of Science and Engineering, ‡Department of Biology and Chemistry, and §Graduate School
of Medicine, Yamaguchi University, Yamaguchi 753-8512, Japan
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