1
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Jiao Z, Jaunich KT, Tao T, Gottschall O, Hughes MM, Turlik A, Schuppe AW. Unified Approach to Deamination and Deoxygenation Through Isonitrile Hydrodecyanation: A Combined Experimental and Computational Investigation. Angew Chem Int Ed Engl 2024; 63:e202405779. [PMID: 38619535 DOI: 10.1002/anie.202405779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/13/2024] [Accepted: 04/15/2024] [Indexed: 04/16/2024]
Abstract
Herein, we describe a general hydrodefunctionalization protocol of alcohols and amines through a common isonitrile intermediate. To cleave the relatively inert C-NC bond, we leveraged dual hydrogen atom transfer (HAT) and photoredox catalysis to generate a nucleophilic boryl radical, which readily forms an imidoyl radical intermediate from the isonitrile. Rapid β-scission then accomplishes defunctionalization. This method has been applied to the hydrodefunctionalization of both amine and alcohol-containing pharmaceuticals, natural products, and biomolecules. We extended this approach to the reduction of carbonyls and olefins to their saturated counterparts, as well as the hydrodecyanation of alkyl nitriles. Both experimental and computational studies demonstrate a facile β-scission of the imidoyl radical, and reconcile differences in reactivity between nitriles and isonitriles within our protocol.
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Affiliation(s)
- Ziqi Jiao
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
| | - Kyle T Jaunich
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
| | - Thomas Tao
- Department of Chemistry, Skidmore College, 815 North Broadway, Saratoga Springs, NY, 12866, USA
| | - Olivia Gottschall
- Department of Chemistry, Skidmore College, 815 North Broadway, Saratoga Springs, NY, 12866, USA
| | - Maxwell M Hughes
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
| | - Aneta Turlik
- Department of Chemistry, Skidmore College, 815 North Broadway, Saratoga Springs, NY, 12866, USA
| | - Alexander W Schuppe
- Department of Chemistry, Vanderbilt University, 1234 Stevenson Center Ln, Nashville, TN, 37240, USA
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2
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Cai Q, McWhinnie IM, Dow NW, Chan AY, MacMillan DWC. Engaging Alkenes in Metallaphotoredox: A Triple Catalytic, Radical Sorting Approach to Olefin-Alcohol Cross-Coupling. J Am Chem Soc 2024; 146:12300-12309. [PMID: 38657210 DOI: 10.1021/jacs.4c02316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
Metallaphotoredox cross-coupling is a well-established strategy for generating clinically privileged aliphatic scaffolds via single-electron reactivity. Correspondingly, expanding metallaphotoredox to encompass new C(sp3)-coupling partners could provide entry to a novel, medicinally relevant chemical space. In particular, alkenes are abundant, bench-stable, and capable of versatile C(sp3)-radical reactivity via metal-hydride hydrogen atom transfer (MHAT), although metallaphotoredox methodologies invoking this strategy remain underdeveloped. Importantly, merging MHAT activation with metallaphotoredox could enable the cross-coupling of olefins with feedstock partners such as alcohols, which undergo facile open-shell activation via photocatalysis. Herein, we report the first C(sp3)-C(sp3) coupling of MHAT-activated alkenes with alcohols by performing deoxygenative hydroalkylation via triple cocatalysis. Through synergistic Ir photoredox, Mn MHAT, and Ni radical sorting pathways, this branch-selective protocol pairs diverse olefins and methanol or primary alcohols with remarkable functional group tolerance to enable the rapid construction of complex aliphatic frameworks.
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Affiliation(s)
- Qinyan Cai
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Iona M McWhinnie
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Nathan W Dow
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Amy Y Chan
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - David W C MacMillan
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
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3
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Tian X, Liu Y, Yakubov S, Schütte J, Chiba S, Barham JP. Photo- and electro-chemical strategies for the activations of strong chemical bonds. Chem Soc Rev 2024; 53:263-316. [PMID: 38059728 DOI: 10.1039/d2cs00581f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
The employment of light and/or electricity - alternatively to conventional thermal energy - unlocks new reactivity paradigms as tools for chemical substrate activations. This leads to the development of new synthetic reactions and a vast expansion of chemical spaces. This review summarizes recent developments in photo- and/or electrochemical activation strategies for the functionalization of strong bonds - particularly carbon-heteroatom (C-X) bonds - via: (1) direct photoexcitation by high energy UV light; (2) activation via photoredox catalysis under irradiation with relatively lower energy UVA or blue light; (3) electrochemical reduction; (4) combination of photocatalysis and electrochemistry. Based on the types of the targeted C-X bonds, various transformations ranging from hydrodefunctionalization to cross-coupling are covered with detailed discussions of their reaction mechanisms.
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Affiliation(s)
- Xianhai Tian
- Fakultät für Chemie und Pharmazie, Universität Regensburg, 93040 Regensburg, Germany.
| | - Yuliang Liu
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore.
| | - Shahboz Yakubov
- Fakultät für Chemie und Pharmazie, Universität Regensburg, 93040 Regensburg, Germany.
| | - Jonathan Schütte
- Fakultät für Chemie und Pharmazie, Universität Regensburg, 93040 Regensburg, Germany.
| | - Shunsuke Chiba
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, Singapore 637371, Singapore.
| | - Joshua P Barham
- Fakultät für Chemie und Pharmazie, Universität Regensburg, 93040 Regensburg, Germany.
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4
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Williams OP, Chmiel AF, Mikhael M, Bates DM, Yeung CS, Wickens ZK. Practical and General Alcohol Deoxygenation Protocol. Angew Chem Int Ed Engl 2023; 62:e202300178. [PMID: 36840940 PMCID: PMC10121858 DOI: 10.1002/anie.202300178] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 02/23/2023] [Accepted: 02/23/2023] [Indexed: 02/26/2023]
Abstract
Herein, we describe a practical protocol for the removal of alcohol functional groups through reductive cleavage of their benzoate ester analogs. This transformation requires a strong single electron transfer (SET) reductant and a means to accelerate slow fragmentation following substrate reduction. To accomplish this, we developed a photocatalytic system that generates a potent reductant from formate salts alongside Brønsted or Lewis acids that promote fragmentation of the reduced intermediate. This deoxygenation procedure is effective across structurally and electronically diverse alcohols and enables a variety of difficult net transformations. This protocol requires no precautions to exclude air or moisture and remains efficient on multigram scale. Finally, the system can be adapted to a one-pot benzoylation-deoxygenation sequence to enable direct alcohol deletion. Mechanistic studies validate that the role of acidic additives is to promote the key C(sp3 )-O bond fragmentation step.
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Affiliation(s)
- Oliver P. Williams
- Department of Chemistry, University of Wisconsin-Madison; Madison, Wisconsin, 53706, United States
| | - Alyah F. Chmiel
- Department of Chemistry, University of Wisconsin-Madison; Madison, Wisconsin, 53706, United States
| | - Myriam Mikhael
- Discovery Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, United States
| | - Desiree M. Bates
- Department of Chemistry, University of Wisconsin-Madison; Madison, Wisconsin, 53706, United States
| | - Charles S. Yeung
- Discovery Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, United States
| | - Zachary K. Wickens
- Department of Chemistry, University of Wisconsin-Madison; Madison, Wisconsin, 53706, United States
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5
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Visible Light-Induced Deoxygenation and Allylation/Vinylation of Pyridyl Ethers. Org Lett 2022; 24:7309-7314. [PMID: 36190797 DOI: 10.1021/acs.orglett.2c02756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The generation of alkyl radicals by deoxygenation of unactivated ethers under visible light catalysis is a hitherto unmet challenge. Herein, we report a visible light-induced deoxygenation of pyridyl ethers via formation of their pyridinium salts. The generated benzylic radicals further react with allyl/alkenyl sulfones to provide a series of coupling products in good to moderate yields. This process is proposed to undergo a reductive quenching cycle, which was elucidated by chemical, optical, and electrical experiments.
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6
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Jeremias N, Peschel MT, Jaschke C, de Vivie-Riedle R, Bach T. Photochemical Ring Contraction of 5,5-Dialkylcyclopent-2-enones and in situ Trapping by Primary Amines. J Org Chem 2022; 88:6294-6303. [PMID: 35786889 DOI: 10.1021/acs.joc.2c01156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
If substituted in the 5,5-position, cyclopent-2-enones undergo a smooth photochemical rearrangement to ketenes. A concomitant cyclopropane formation occurs due to a 1,3-shift of the C5 carbon atom from the carbonyl carbon atom (C1) to carbon atom C3. In this study, the cyclopropyl-substituted ketene intermediates were trapped in situ by primary amines providing an efficient entry into 2,2-disubstituted cyclopropaneacetic amides (24 examples, 49-95% yield). A remarkable feature of the reaction is the fact that the photochemical rearrangement can occur from either the first excited singlet (S1) or the respective triplet state (T1). In line with experimental results (triplet quenching, sensitization), XMS-CASPT2 calculations support the existence of efficient reaction pathways to the intermediate ketene both on the singlet and on the triplet hypersurface.
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Affiliation(s)
- Noah Jeremias
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Martin T Peschel
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, 81377 München, Germany
| | - Constantin Jaschke
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, 81377 München, Germany
| | - Regina de Vivie-Riedle
- Department Chemie, Ludwig-Maximilians-Universität München, Butenandtstrasse 11, 81377 München, Germany
| | - Thorsten Bach
- School of Natural Sciences, Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
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7
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Peng TY, Xu ZY, Zhang FL, Li B, Xu WP, Fu Y, Wang YF. Dehydroxylative Alkylation of α-Hydroxy Carboxylic Acid Derivatives via a Spin-Center Shift. Angew Chem Int Ed Engl 2022; 61:e202201329. [PMID: 35388555 DOI: 10.1002/anie.202201329] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Indexed: 11/05/2022]
Abstract
A strategically distinct dehydroxylative alkylation reaction of α-hydroxy carboxylic acid derivatives with alkenes is developed. The reaction starts with the attack of a 4-dimethylaminopyridine (DMAP)-boryl radical to the carbonyl oxygen atom, followed by a spin-center shift (SCS) to trigger the C-O bond scission. The resulting α-carbonyl radicals couple with a wide range of alkenes to furnish various alkylated products. This strategy allows for the efficient conversion of a wide array of α-hydroxy amides and esters derived from several biomass molecules and natural products to value-added compounds. Experimental and computational studies verified the reaction mechanism.
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Affiliation(s)
- Tian-Yu Peng
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Zhe-Yuan Xu
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Feng-Lian Zhang
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Bin Li
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Wen-Ping Xu
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Yao Fu
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Yi-Feng Wang
- CAS Key Laboratory of Urban Pollutant Conversion, Anhui Province Key Laboratory of Biomass Clean Energy, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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8
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Kolusu SRN, Nappi M. Metal-free deoxygenative coupling of alcohol-derived benzoates and pyridines for small molecules and DNA-encoded libraries synthesis. Chem Sci 2022; 13:6982-6989. [PMID: 35774170 PMCID: PMC9200129 DOI: 10.1039/d2sc01621d] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 05/09/2022] [Indexed: 01/22/2023] Open
Abstract
Alcohols are among the most widely occurring functional groups found in naturally abundant, biologically relevant organic compounds, which in many cases are considered feedstock chemicals. Herein, we report a metal-free method for the deoxygenative coupling of alcohol-derived benzoates and pyridines promoted by visible light. Given the practical, mild and water-compatible conditions, small molecules and DNA headpieces can be successfully functionalized with a range of primary, secondary and tertiary alcohols. This protocol is distinguished by its wide substrate scope and broad applicability, even in the context of late-stage functionalization and DNA-drug coupling reactions.
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Affiliation(s)
- Sai Rohini Narayanan Kolusu
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela Rúa de Jenaro de la Fuente, s/n, 15705 Santiago de Compostela A Coruña Spain https://nappichem.com
| | - Manuel Nappi
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CiQUS), Departamento de Química Orgánica, Universidade de Santiago de Compostela Rúa de Jenaro de la Fuente, s/n, 15705 Santiago de Compostela A Coruña Spain https://nappichem.com
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9
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Anwar K, Merkens K, Aguilar Troyano FJ, Gómez-Suárez A. Radical Deoxyfunctionalisation Strategies. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Khadijah Anwar
- Bergische Universität Wuppertal: Bergische Universitat Wuppertal Organic Chemistry GERMANY
| | - Kay Merkens
- Bergische Universität Wuppertal: Bergische Universitat Wuppertal Organic Chemstry GERMANY
| | | | - Adrián Gómez-Suárez
- Bergische Universitat Wuppertal Organische Chemie Gaußstr. 20 42119 Wuppertal GERMANY
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10
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Peng TY, Xu ZY, Zhang FL, Li B, Xu WP, Fu Y, Wang YF. Dehydroxylative Alkylation of α‐Hydroxy Carboxylic Acids Derivatives via Spin‐center Shift. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202201329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tian-Yu Peng
- University of Science and Technology of China Department of Chemistry CHINA
| | - Zhe-Yuan Xu
- University of Science and Technology of China Department of Chemistry CHINA
| | - Feng-Lian Zhang
- University of Science and Technology of China Department of Chemistry CHINA
| | - Bin Li
- University of Science and Technology of China Department of Chemistry CHINA
| | - Wen-Ping Xu
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yao Fu
- University of Science and Technology of China Department of Chemistry CHINA
| | - Yi-Feng Wang
- University of Science and Technology of China Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry 96 Jinzhai Road 230026 Hefei CHINA
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11
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Lu FD, Shu ZC, He GF, Bai JC, Lu LQ, Xiao WJ. Photoinduced C–O bond cleavage for copper-catalyzed allenyl radical cyanation. Org Chem Front 2022. [DOI: 10.1039/d2qo00938b] [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 synthesis of allenyl nitriles was realized through the combination of photoinduced C–O bond cleavage and copper catalysis. Both 1,3-disubstituted and trisubstituted allenyl nitriles were accessed with good yields and high regioselectivity.
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Affiliation(s)
- Fu-Dong Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Zhen-Cao Shu
- Wuhan Youji Industries Co., Ltd, No.1 2nd Chemical Rd., Wuhan, Hubei, 430082, China
| | - Gui-Feng He
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Jun-Chuan Bai
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide & Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
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12
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Tian X, Karl TA, Reiter S, Yakubov S, de Vivie‐Riedle R, König B, Barham JP. Electro-mediated PhotoRedox Catalysis for Selective C(sp 3 )-O Cleavages of Phosphinated Alcohols to Carbanions. Angew Chem Int Ed Engl 2021; 60:20817-20825. [PMID: 34165861 PMCID: PMC8518744 DOI: 10.1002/anie.202105895] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/21/2021] [Indexed: 12/13/2022]
Abstract
We report a novel example of electro-mediated photoredox catalysis (e-PRC) in the reductive cleavage of C(sp3 )-O bonds of phosphinated alcohols to alkyl carbanions. As well as deoxygenations, olefinations are reported which are E-selective and can be made Z-selective in a tandem reduction/photosensitization process where both steps are photoelectrochemically promoted. Spectroscopy, computation, and catalyst structural variations reveal that our new naphthalene monoimide-type catalyst allows for an intimate dispersive precomplexation of its radical anion form with the phosphinate substrate, facilitating a reactivity-determining C(sp3 )-O cleavage. Surprisingly and in contrast to previously reported photoexcited radical anion chemistries, our conditions tolerate aryl chlorides/bromides and do not give rise to Birch-type reductions.
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Affiliation(s)
- Xianhai Tian
- Institute of Organic ChemistryUniversity of RegensburgUniversitätsstr. 3193053RegensburgGermany
| | - Tobias A. Karl
- Institute of Organic ChemistryUniversity of RegensburgUniversitätsstr. 3193053RegensburgGermany
| | | | - Shahboz Yakubov
- Institute of Organic ChemistryUniversity of RegensburgUniversitätsstr. 3193053RegensburgGermany
| | | | - Burkhard König
- Institute of Organic ChemistryUniversity of RegensburgUniversitätsstr. 3193053RegensburgGermany
| | - Joshua P. Barham
- Institute of Organic ChemistryUniversity of RegensburgUniversitätsstr. 3193053RegensburgGermany
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13
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Selective deoxygenative alkylation of alcohols via photocatalytic domino radical fragmentations. Nat Commun 2021; 12:5365. [PMID: 34508098 PMCID: PMC8433232 DOI: 10.1038/s41467-021-25702-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Accepted: 08/26/2021] [Indexed: 11/29/2022] Open
Abstract
The delivery of alkyl radicals through photocatalytic deoxygenation of primary alcohols under mild conditions is a so far unmet challenge. In this report, we present a one-pot strategy for deoxygenative Giese reaction of alcohols with electron-deficient alkenes, by using xanthate salts as alcohol-activating groups for radical generation under visible-light photoredox conditions in the presence of triphenylphosphine. The convenient generation of xanthate salts and high reactivity of sequential C–S/C–O bond homolytic cleavage enable efficient deoxygenation of primary, secondary and tertiary alcohols with diverse functionality and structure to generate the corresponding alkyl radicals, including methyl radical. Moreover, chemoselective radical monodeoxygenation of diols is achieved via selective formation of xanthate salts. The generation of alkyl radicals through deoxygenation of abundant alcohols via photoredox catalysis is of interest. In this study, the authors report a one-pot strategy for visible-light-promoted photoredox coupling of alcohols with electron-deficient alkenes, assisted by carbon disulfide and triphenylphosphine.
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14
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Tian X, Karl TA, Reiter S, Yakubov S, Vivie‐Riedle R, König B, Barham JP. Electro‐mediated PhotoRedox Catalysis for Selective C(sp
3
)–O Cleavages of Phosphinated Alcohols to Carbanions. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202105895] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Xianhai Tian
- Institute of Organic Chemistry University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Tobias A. Karl
- Institute of Organic Chemistry University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | | | - Shahboz Yakubov
- Institute of Organic Chemistry University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | | | - Burkhard König
- Institute of Organic Chemistry University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
| | - Joshua P. Barham
- Institute of Organic Chemistry University of Regensburg Universitätsstr. 31 93053 Regensburg Germany
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15
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Day JI, Grotjahn S, Senaweera S, Koenig B, Weaver Iii JD. Defluorodearomatization: A Photocatalytic Birch-Like Reduction That Enables C-C Bond Formation and Provides Access to Unnatural Cannabinoids. J Org Chem 2021; 86:7928-7945. [PMID: 34076434 PMCID: PMC8716186 DOI: 10.1021/acs.joc.1c00169] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Within the framework of discovery chemistry, polyfluorination remains a synthetic challenge despite its ability to provide useful characteristics, such as a reduction in the number of hydrogen bond donors and metabolic stability. Coupling a reversal of this methodology with photocatalysis has been demonstrated to allow the rapid synthesis of previously difficult or impossible targets by starting with fluorines everywhere and selectively removing or functionalizing them. Herein, we demonstrate a novel method to synthesize 1,4-cyclohexadienes through a dearomative photocatalytic C-C coupling reaction. This allows for access to materials that are orthogonal to the selectivity of the Birch reaction and are more functional-group-tolerant. The reaction also allows the efficient synthesis of polyfluorinated cannabinoids. While the yields are modest, the access to the new chemical space provided by the reaction is unprecedented by any means. The trifluorinated analog of THC, 1-deoxy-1,2,4-trifluoro-THC, is synthesized, demonstrating the importance of discovery chemistry and the ability to explore otherwise unknown structure-activity relationships.
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Affiliation(s)
- Jon I Day
- Department of Chemistry, Oklahoma State University, 107 Physical Science, 74078 Stillwater, Oklahoma, United States
| | - Sascha Grotjahn
- Institut für Organische Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Sameera Senaweera
- Center for Drug Design, College of Pharmacy, University of Minnesota, 7-158 Phillips Wangensteen Building, 516 Delaware Street SE, Minneapolis, Minnesota 55455, United States
| | - Burkhard Koenig
- Institut für Organische Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Jimmie D Weaver Iii
- Department of Chemistry, Oklahoma State University, 107 Physical Science, 74078 Stillwater, Oklahoma, United States
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16
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Lu FD, Lu LQ, He GF, Bai JC, Xiao WJ. Enantioselective Radical Carbocyanation of 1,3-Dienes via Photocatalytic Generation of Allylcopper Complexes. J Am Chem Soc 2021; 143:4168-4173. [DOI: 10.1021/jacs.1c01260] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Fu-Dong Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000, People’s Republic of China
| | - Gui-Feng He
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Jun-Chuan Bai
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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17
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Chen H, Lu F, Cheng Y, Jia Y, Lu L, Xiao W. Asymmetric Deoxygenative Cyanation of Benzyl Alcohols Enabled by Synergistic Photoredox and Copper Catalysis
†. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000309] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hong‐Wei Chen
- CCNU‐uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University 152 Luoyu Road Wuhan Hubei 430079 China
| | - Fu‐Dong Lu
- CCNU‐uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University 152 Luoyu Road Wuhan Hubei 430079 China
| | - Ying Cheng
- CCNU‐uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University 152 Luoyu Road Wuhan Hubei 430079 China
| | - Yue Jia
- CCNU‐uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University 152 Luoyu Road Wuhan Hubei 430079 China
| | - Liang‐Qiu Lu
- CCNU‐uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University 152 Luoyu Road Wuhan Hubei 430079 China
| | - Wen‐Jing Xiao
- CCNU‐uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University 152 Luoyu Road Wuhan Hubei 430079 China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry 345 Lingling Road Shanghai 200032 China
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18
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Sandeep, Venugopalan P, Kumar A. Metal Free, Direct and Selective Deoxygenation of α-Hydroxy Carbonyl Compounds: Access to α,α-Diaryl Carbonyl Compounds. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sandeep
- Department of Applied Sciences; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
- Department of Chemistry; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
| | - Paloth Venugopalan
- Department of Chemistry; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
| | - Anil Kumar
- Department of Applied Sciences; University Institute of Engineering and Technology; Panjab University; 160014 Chandigarh India
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19
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Bian Y, Qu X, Chan KS. Base-Promoted C–O Bond Cleavage of Primary Alcohols by Iridium(III) Porphyrin Chloride. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongjun Bian
- College of Chemistry and Chemical Engineering, Jinzhong University, Yuci 030619, People’s Republic of China
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Xingyu Qu
- College of Chemistry and Chemical Engineering, Jinzhong University, Yuci 030619, People’s Republic of China
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
| | - Kin Shing Chan
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, People’s Republic of China
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210046, People’s Republic of China
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20
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Yu XY, Chen J, Chen HW, Xiao WJ, Chen JR. Visible-Light-Driven Copper-Catalyzed C(sp3)–O Cross-Coupling of Benzylic Radicals with Phenols. Org Lett 2020; 22:2333-2338. [DOI: 10.1021/acs.orglett.0c00532] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao-Ye Yu
- CCNU-uOttawa Joint Research Centre, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Jun Chen
- CCNU-uOttawa Joint Research Centre, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Hong-Wei Chen
- CCNU-uOttawa Joint Research Centre, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Jia-Rong Chen
- CCNU-uOttawa Joint Research Centre, Hubei International Scientific and Technological Cooperation Base of Pesticide and Green Synthesis, Key Laboratory of Pesticides & Chemical Biology Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan, Hubei 430079, China
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21
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Pichon MM, Hazelard D, Compain P. Metal-Free Deoxygenation of α-Hydroxy Carbonyl Compounds and Beyond. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900838] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Maëva M. Pichon
- Laboratoire d′Innovation Moléculaire et Applications (LIMA); Univ. de Strasbourg; Univ. de Haute-Alsace, CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM; 25 Rue Becquerel 67000 Strasbourg France
| | - Damien Hazelard
- Laboratoire d′Innovation Moléculaire et Applications (LIMA); Univ. de Strasbourg; Univ. de Haute-Alsace, CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM; 25 Rue Becquerel 67000 Strasbourg France
| | - Philippe Compain
- Laboratoire d′Innovation Moléculaire et Applications (LIMA); Univ. de Strasbourg; Univ. de Haute-Alsace, CNRS (UMR 7042) Equipe de Synthèse Organique et Molécules Bioactives (SYBIO), ECPM; 25 Rue Becquerel 67000 Strasbourg France
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22
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Schmermund L, Jurkaš V, Özgen FF, Barone GD, Büchsenschütz HC, Winkler CK, Schmidt S, Kourist R, Kroutil W. Photo-Biocatalysis: Biotransformations in the Presence of Light. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00656] [Citation(s) in RCA: 147] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Luca Schmermund
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, BioHealth, Heinrichstrasse 28, 8010 Graz, Austria
| | - Valentina Jurkaš
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, BioHealth, Heinrichstrasse 28, 8010 Graz, Austria
| | - F. Feyza Özgen
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Giovanni D. Barone
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Hanna C. Büchsenschütz
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Christoph K. Winkler
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, BioHealth, Heinrichstrasse 28, 8010 Graz, Austria
| | - Sandy Schmidt
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Robert Kourist
- Institute of Molecular Biotechnology, Graz University of Technology, NAWI Graz, Petersgasse 14, 8010 Graz, Austria
| | - Wolfgang Kroutil
- Institute of Chemistry, University of Graz, NAWI Graz, BioTechMed Graz, BioHealth, Heinrichstrasse 28, 8010 Graz, Austria
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23
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Lu FD, Liu D, Zhu L, Lu LQ, Yang Q, Zhou QQ, Wei Y, Lan Y, Xiao WJ. Asymmetric Propargylic Radical Cyanation Enabled by Dual Organophotoredox and Copper Catalysis. J Am Chem Soc 2019; 141:6167-6172. [DOI: 10.1021/jacs.9b02338] [Citation(s) in RCA: 126] [Impact Index Per Article: 25.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Fu-Dong Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Dan Liu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Lei Zhu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
| | - Liang-Qiu Lu
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Qian Yang
- School of Chemistry and Chemical Engineering, Huazhong University of Science & Technology, 1037 Luoyu Road, Wuhan 430074, China
| | - Quan-Quan Zhou
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Yi Wei
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
| | - Wen-Jing Xiao
- CCNU-uOttawa Joint Research Centre, Key Laboratory of Pesticide and Chemical Biology, Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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24
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Wang X, Li H, Qiu G, Wu J. Substituted Hantzsch esters as radical reservoirs with the insertion of sulfur dioxide under photoredox catalysis. Chem Commun (Camb) 2019; 55:2062-2065. [DOI: 10.1039/c8cc10246e] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A three-component reaction between 4-substituted Hantzsch esters, DABCO·(SO2)2, and vinyl azides in the presence of photoredox catalysts under visible light irradiation is developed. A range of (Z)-2-(alkylsulfonyl)-1-arylethen-1-amines is obtained in moderate to good yields with good regioselectivity and stereoselectivity.
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Affiliation(s)
- Xuefeng Wang
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
| | - Haozhe Li
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
| | - Guanyinsheng Qiu
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
| | - Jie Wu
- Department of Chemistry
- Fudan University
- 2005 Songhu Road
- Shanghai 200438
- China
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25
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Grübel M, Bosque I, Altmann PJ, Bach T, Hess CR. Redox and photocatalytic properties of a Ni II complex with a macrocyclic biquinazoline (Mabiq) ligand. Chem Sci 2018; 9:3313-3317. [PMID: 29780460 PMCID: PMC5932533 DOI: 10.1039/c7sc05320g] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Accepted: 02/20/2018] [Indexed: 01/04/2023] Open
Abstract
We present a late, first row transition metal photosensitizer that promotes photocatalytic C-C bond formation. The title compound, [Ni(Mabiq)]OTf, as well as its one-electron reduced form, Ni(Mabiq), were synthesized and molecular structures of both were obtained. The electronic structure of the reduced complex additionally was characterized by spectroscopic and DFT computational methods. Notably, [NiII(Mabiq)]OTf is photoactive: reduction of the compound was achieved photochemically upon irradiation at λ = 457 nm and reductive quenching by NEt3. The performance of [Ni(Mabiq)]OTf as a photoredox catalyst was examined in the cyclization of a bromoalkyl-substituted indole. In this reaction, the first-row transition metal compound is comparable if not superior to [Ru(bpy)3]2+ in terms of efficiency (turnover number) and chemoselectivity. Studies using a series of sacrificial donor amines indicate that the excited state redox potential of [Ni(Mabiq)]+* is ≥1.25 V vs. SCE. This value is similar to the excited state potential of commonly employed noble metal based photocatalysts. The Ni-Mabiq compound thus provides a rare example of an earth-abundant photoredox catalyst.
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Affiliation(s)
- Michael Grübel
- Department of Chemistry , Catalysis Research Center (CRC) , Technische Universität München , 85747 Garching , Germany . ;
| | - Irene Bosque
- Department of Chemistry , Catalysis Research Center (CRC) , Technische Universität München , 85747 Garching , Germany . ;
| | - Philipp J Altmann
- Department of Chemistry , Catalysis Research Center (CRC) , Technische Universität München , 85747 Garching , Germany . ;
| | - Thorsten Bach
- Department of Chemistry , Catalysis Research Center (CRC) , Technische Universität München , 85747 Garching , Germany . ;
| | - Corinna R Hess
- Department of Chemistry , Catalysis Research Center (CRC) , Technische Universität München , 85747 Garching , Germany . ;
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26
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Hörmann FM, Chung TS, Rodriguez E, Jakob M, Bach T. Evidence for Triplet Sensitization in the Visible-Light-Induced [2+2] Photocycloaddition of Eniminium Ions. Angew Chem Int Ed Engl 2017; 57:827-831. [PMID: 29178574 PMCID: PMC5768022 DOI: 10.1002/anie.201710441] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Indexed: 11/08/2022]
Abstract
Εniminium ions were prepared from the corresponding α,β-unsaturated carbonyl compounds (enones and enals), and were found to be promoted to their respective triplet states by energy transfer. The photoexcited intermediates underwent intra- or intermolecular [2+2] photocycloaddition in good yields (50-78 %) upon irradiation at λ=433 nm or λ=457 nm. Iridium or ruthenium complexes with a sufficiently high triplet energy were identified as efficient catalysts (2.5 mol % catalyst loading) for the reaction. The intermolecular [2+2] photocycloaddition of an eniminium ion derived from a chiral secondary amine proceeded with high enantioselectivity (88 % ee).
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Affiliation(s)
- Fabian M Hörmann
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Tim S Chung
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Elsa Rodriguez
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Matthias Jakob
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
| | - Thorsten Bach
- Department Chemie und Catalysis Research Center, CRC, Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany
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27
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Hörmann FM, Chung TS, Rodriguez E, Jakob M, Bach T. Hinweise auf eine Triplett‐Sensibilisierung in der [2+2]‐Photocycloaddition von Eniminiumionen mit sichtbarem Licht. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710441] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Fabian M. Hörmann
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Tim S. Chung
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Elsa Rodriguez
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Matthias Jakob
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
| | - Thorsten Bach
- Department Chemie und Catalysis Research Center, CRCTechnische Universität München Lichtenbergstraße 4 85747 Garching Deutschland
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28
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Lee M, Neukirchen S, Cabrele C, Reiser O. Visible-light photoredox-catalyzed desulfurization of thiol- and disulfide-containing amino acids and small peptides. J Pept Sci 2017; 23:556-562. [DOI: 10.1002/psc.3016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 05/11/2017] [Accepted: 05/12/2017] [Indexed: 01/09/2023]
Affiliation(s)
- Myungmo Lee
- Institute of Organic Chemistry; University of Regensburg; D-93053 Regensburg Germany
| | - Saskia Neukirchen
- Department of Molecular Biology; University of Salzburg; A-5020 Salzburg Austria
- Department of Chemistry and Biochemistry; Ruhr-University Bochum; Universitätsstrasse 150 44801 Bochum Germany
| | - Chiara Cabrele
- Department of Molecular Biology; University of Salzburg; A-5020 Salzburg Austria
| | - Oliver Reiser
- Institute of Organic Chemistry; University of Regensburg; D-93053 Regensburg Germany
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29
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Rackl D, Kais V, Lutsker E, Reiser AO. Synthesis of Chiral Tetrahydrofurans and Pyrrolidines by Visible-Light-Mediated Deoxygenation. European J Org Chem 2017; 2017:2130-2138. [PMID: 28529446 PMCID: PMC5412674 DOI: 10.1002/ejoc.201700014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Indexed: 11/12/2022]
Abstract
The synthesis of chiral tetrahydrofurans and pyrrolidines starting from 1,2-diols or β-amino alcohols, respectively, by visible-light-mediated deoxygenation is described. Easily accessible monoallylated/propargylated substrates were activated either as inexpensive ethyl oxalates or as recyclable 3,5-bis(trifluoromethyl)benzoates to generate alkyl radicals suitable for 5-exo-trig/5-exo-dig cyclizations under visible-light irradiation.
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Affiliation(s)
- Daniel Rackl
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
| | - Viktor Kais
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
| | - Eugen Lutsker
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
| | - And Oliver Reiser
- Institute of Organic Chemistry University of Regensburg 93053 Regensburg Germany
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30
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Brenninger C, Pöthig A, Bach T. Brønsted Acid Catalysis in Visible-Light-Induced [2+2] Photocycloaddition Reactions of Enone Dithianes. Angew Chem Int Ed Engl 2017; 56:4337-4341. [PMID: 28319302 PMCID: PMC5396283 DOI: 10.1002/anie.201700837] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 02/09/2017] [Indexed: 12/15/2022]
Abstract
1,3-Dithiane-protected enones (enone dithianes) were found to undergo an intramolecular [2+2] photocycloaddition under visible-light irradiation (λ=405 nm) in the presence of a Brønsted acid (7.5-10 mol %). Key to the success of the reaction is presumably the formation of colored thionium ions, which are intermediates of the catalytic cycle. Cyclobutanes were thus obtained in very good yields (78-90 %). It is also shown that the dithiane moiety can be reductively or oxidatively removed without affecting the photochemically constructed ring skeleton.
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Affiliation(s)
- Christoph Brenninger
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstrasse 485747GarchingGermany
| | - Alexander Pöthig
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstrasse 485747GarchingGermany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC)Technische Universität MünchenLichtenbergstrasse 485747GarchingGermany
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31
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Brenninger C, Pöthig A, Bach T. Brønsted-Säure-Katalyse der [2+2]-Photocycloaddition von Enondithianen bei Bestrahlung mit sichtbarem Licht. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700837] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Christoph Brenninger
- Department Chemie und Catalysis Research Center (CRC); Technische Universität München; Lichtenbergstr. 4 85747 Garching Deutschland
| | - Alexander Pöthig
- Department Chemie und Catalysis Research Center (CRC); Technische Universität München; Lichtenbergstr. 4 85747 Garching Deutschland
| | - Thorsten Bach
- Department Chemie und Catalysis Research Center (CRC); Technische Universität München; Lichtenbergstr. 4 85747 Garching Deutschland
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32
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Colmenares JC, Varma RS, Nair V. Selective photocatalysis of lignin-inspired chemicals by integrating hybrid nanocatalysis in microfluidic reactors. Chem Soc Rev 2017; 46:6675-6686. [DOI: 10.1039/c7cs00257b] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In an ideal symbiosis of nanophotocatalysis and microflow chemistry, this tutorial review delineates a micro-highway decorated with semiconductor-based photocatalytic thin layers for the selective transformations of lignin-based chemicals to high-value organic products.
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Affiliation(s)
| | - Rajender S. Varma
- Regional Centre of Advanced Technologies and Materials
- Faculty of Science
- Palacky University
- Olomouc
- Czech Republic
| | - Vaishakh Nair
- Institute of Physical Chemistry
- Polish Academy of Sciences
- 01-224 Warsaw
- Poland
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33
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Chowdhury S, Standaert RF. Deoxygenation of Unhindered Alcohols via Reductive Dealkylation of Derived Phosphate Esters. J Org Chem 2016; 81:9957-9963. [DOI: 10.1021/acs.joc.6b01699] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarwat Chowdhury
- Department
of Chemistry, The University of Illinois at Chicago, 845 West
Taylor Street, Chicago, Illinois 60304, United States
| | - Robert F. Standaert
- Biosciences
Division, Oak Ridge National Laboratory, PO Box 2008, Oak Ridge, Tennessee 37831-6445, United States
- Department of Biochemistry and Cellular & Molecular Biology, University of Tennessee, Knoxville, Tennessee 37996, United States
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34
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Goddard JP, Ollivier C, Fensterbank L. Photoredox Catalysis for the Generation of Carbon Centered Radicals. Acc Chem Res 2016; 49:1924-36. [PMID: 27529633 DOI: 10.1021/acs.accounts.6b00288] [Citation(s) in RCA: 199] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Radical chemistry has witnessed over the last decades important advances that have positioned it as a methodology of choice in synthetic chemistry. A number of great attributes such as specific reactivities, the knowledge of the kinetics of most elementary processes, the functional group tolerance, and the possibility to operate cascade sequences are clearly responsible for this craze. Nevertheless, at the end of the last century, radical chemistry appeared plagued by several hurdles to overcome such as the use of environmentally problematic mediators or the impossibility of scale up. While the concept of photocatalysis was firmly established in the coordination chemistry community, its diffusion in organic synthetic chemistry remained sporadic for decades until the end of the 2000s with the breakthrough merging of organocatalysis and photocatalysis by the MacMillan group and contemporary reports by the groups of Yoon and Stephenson. Since then, photoredox catalysis has enjoyed particularly active and intense developments. It is now the topic of a still increasing number of publications featuring various applications from asymmetric synthesis, total synthesis of natural products, and polymerization to process (flow) chemistry. In this Account, we survey our own efforts in this domain, focusing on the elaboration of new photocatalytic pathways that could lead to the efficient generation of C-centered functionalized alkyl and aryl radicals. Both reductive and oxidative manifolds are accessible through photoredox catalysis, which has guided us along these lines in our projects. Thus, we studied the photocatalytic reduction of onium salts such as sulfoniums and iodoniums for the production of the elusive aryl radical intermediates. Progressing to more relevant chemistry for synthesis, we examined the cleavage of C-O and the C-Br bonds for the generation of alkyl C-centered radicals. Activated epoxides could serve as valuable substrates of a photocatalyzed variant of the Nugent-RajanBabu-Gansäuer homolytic cleavage of epoxides. Using imidazole based carbamates, we could also devise the first photocatalyzed Barton-McCombie deoxygenation reaction. Finally, bromophenylacetate can be reduced using the [Au2(μ-dppm)2]Cl2 photocatalyst under UVA or visible-light. This was used for the initiation of the controlled atom transfer radical polymerization of methacrylates and acrylates in solution or laminate. Our next endeavors concerned the photocatalyzed oxidation of stabilized carbanions such as enolates of 1,3-dicarbonyl substrates, trifluoroborates, and more extensively bis-catecholato silicates. Because of their low oxidation potentials, the later have proved to be exquisite sources of radical entities, which can be engaged in diverse intermolecular reactions such as vinylation, alkynylation, and conjugate additions. The bis-catecholato silicates were also shown to behave as excellent partners of dual photoredox-nickel catalysis leading in an expeditious manner to libraries of cross coupling products.
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Affiliation(s)
- Jean-Philippe Goddard
- Université de Haute-Alsace, Ecole Nationale Supérieure de Chimie de Mulhouse,
Laboratoire de Chimie Organique et Bioorganique EA 4566, 3 Bis rue Alfred Werner, 68093 Mulhouse Cedex, France
| | - Cyril Ollivier
- UPMC Univ-Paris 06 − Sorbonne Universités, Institut Parisien de Chimie Moléculaire (UMR
CNRS 8232), 4 Place Jussieu,
C. 229, 75005 Paris, France
| | - Louis Fensterbank
- UPMC Univ-Paris 06 − Sorbonne Universités, Institut Parisien de Chimie Moléculaire (UMR
CNRS 8232), 4 Place Jussieu,
C. 229, 75005 Paris, France
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Chen W, Liu Z, Tian J, Li J, Ma J, Cheng X, Li G. Building Congested Ketone: Substituted Hantzsch Ester and Nitrile as Alkylation Reagents in Photoredox Catalysis. J Am Chem Soc 2016; 138:12312-5. [DOI: 10.1021/jacs.6b06379] [Citation(s) in RCA: 129] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Wenxin Chen
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Zheng Liu
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Jiaqi Tian
- Key
Laboratory of Mesoscopic Chemistry of MOE, Collaborative Innovation
Center of Chemistry for Life Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Jin Li
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Jing Ma
- Key
Laboratory of Mesoscopic Chemistry of MOE, Collaborative Innovation
Center of Chemistry for Life Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Xu Cheng
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
| | - Guigen Li
- Institute
of Chemistry and Biomedical Sciences, School of Chemistry and Chemical
Engineering, Nanjing University, Nanjing, China
- Department
of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, United States
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Rawner T, Knorn M, Lutsker E, Hossain A, Reiser O. Synthesis of Trifluoromethylated Sultones from Alkenols Using a Copper Photoredox Catalyst. J Org Chem 2016; 81:7139-47. [DOI: 10.1021/acs.joc.6b01001] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thomas Rawner
- Institut
für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Matthias Knorn
- Institut
für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Eugen Lutsker
- Institut
für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Asik Hossain
- Institut
für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institut
für Organische
Chemie, Universität Regensburg, Universitätsstr. 31, 93053 Regensburg, Germany
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37
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Jarrige L, Carboni A, Dagousset G, Levitre G, Magnier E, Masson G. Photoredox-Catalyzed Three-Component Tandem Process: An Assembly of Complex Trifluoromethylated Phthalans and Isoindolines. Org Lett 2016; 18:2906-9. [PMID: 27276522 DOI: 10.1021/acs.orglett.6b01257] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel photoredox-mediated tandem three-component process afforded a wide variety of CF3-containing phthalans and isoindolines in respectable yields and with moderate to excellent diastereoselectivity.
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Affiliation(s)
- Lucie Jarrige
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS , 91198 Gif-sur-Yvette Cedex, France
| | - Aude Carboni
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS , 91198 Gif-sur-Yvette Cedex, France
| | - Guillaume Dagousset
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS , 91198 Gif-sur-Yvette Cedex, France.,Institut Lavoisier de Versailles, UMR 8180, Université de Versailles-Saint-Quentin , 78035 Versailles Cedex, France
| | - Guillaume Levitre
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS , 91198 Gif-sur-Yvette Cedex, France
| | - Emmanuel Magnier
- Institut Lavoisier de Versailles, UMR 8180, Université de Versailles-Saint-Quentin , 78035 Versailles Cedex, France
| | - Géraldine Masson
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS , 91198 Gif-sur-Yvette Cedex, France
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38
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Chen W, Tao H, Huang W, Wang G, Li S, Cheng X, Li G. Hantzsch Ester as a Photosensitizer for the Visible-Light-Induced Debromination of Vicinal Dibromo Compounds. Chemistry 2016; 22:9546-50. [PMID: 27128783 DOI: 10.1002/chem.201601819] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Indexed: 11/11/2022]
Abstract
The debromination of vicinal dibromo compounds to generate alkenes usually requires harsh reaction conditions and the addition of catalysts. Just recently the visible-light-induced debromination of vicinal dibromo compounds emerged as a possible alternative to commonly used methods, but the substrate scope of this reaction is limited and a photocatalyst is necessary for the successful conversion of the starting compounds. A catalyst-free visible-light-induced debromination of vicinal dibromo compounds with a base-activated Hantzsch ester as photosensitizer is reported. The method has a wide substrate scope and a broad functional-group compatibility.
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Affiliation(s)
- Wenxin Chen
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China
| | - Huachen Tao
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China
| | - Wenhao Huang
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road, 22, Nanjing, China
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Hankou Road, 22, Nanjing, China.
| | - Xu Cheng
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China.
| | - Guigen Li
- Institute of Chemistry and Biomedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Xianlin Road, 163, Nanjing, China.,Department of Chemistry and Biochemistry, Texas Tech University, Memorial Circle & Boston, TX 79409-1061, Lubbock, United States
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Lenhart D, Bauer A, Pöthig A, Bach T. Enantioselective Visible-Light-Induced Radical-Addition Reactions to 3-Alkylidene Indolin-2-ones. Chemistry 2016; 22:6519-23. [PMID: 26946444 DOI: 10.1002/chem.201600600] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Indexed: 11/10/2022]
Abstract
The title compounds underwent a facile and high-yielding addition reaction (19 examples, 66-99% yield) with various N-(trimethylsilyl)methyl-substituted amines upon irradiation with visible light and catalysis by a metal complex. If the alkylidene substituent is non-symmetric and if the reaction is performed in the presence of a chiral hydrogen-bonding template, products are obtained with significant enantioselectivity (58-72% ee) as a mixture of diastereoisomers. Mechanistic studies suggest a closed catalytic cycle for the photoactive metal complex. However, the silyl transfer from the amine occurs not only to the product, but also to the substrate, and interferes with the desired chirality transfer.
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Affiliation(s)
- Dominik Lenhart
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany), Fax
| | - Andreas Bauer
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany), Fax
| | - Alexander Pöthig
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany), Fax
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), Technische Universität München, Lichtenbergstrasse 4, 85747, Garching, Germany), Fax.
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40
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Luca OR, Fenwick AQ. Organic reactions for the electrochemical and photochemical production of chemical fuels from CO2 – The reduction chemistry of carboxylic acids and derivatives as bent CO2 surrogates. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 152:26-42. [DOI: 10.1016/j.jphotobiol.2015.04.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2015] [Revised: 04/10/2015] [Accepted: 04/16/2015] [Indexed: 11/25/2022]
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41
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Speckmeier E, Padié C, Zeitler K. Visible Light Mediated Reductive Cleavage of C–O Bonds Accessing α-Substituted Aryl Ketones. Org Lett 2015; 17:4818-21. [DOI: 10.1021/acs.orglett.5b02378] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elisabeth Speckmeier
- Institut
für Organische Chemie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - Clément Padié
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstraße
31, D-93053 Regensburg, Germany
| | - Kirsten Zeitler
- Institut
für Organische Chemie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
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42
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Knorn M, Rawner T, Czerwieniec R, Reiser O. [Copper(phenanthroline)(bisisonitrile)]+-Complexes for the Visible-Light-Mediated Atom Transfer Radical Addition and Allylation Reactions. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01071] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Matthias Knorn
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstraße
31, 93053 Regensburg, Germany
| | - Thomas Rawner
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstraße
31, 93053 Regensburg, Germany
| | - Rafał Czerwieniec
- Institut
für Physikalische Chemie, Universität Regensburg, Universitätsstraße
31, 93053 Regensburg, Germany
| | - Oliver Reiser
- Institut
für Organische Chemie, Universität Regensburg, Universitätsstraße
31, 93053 Regensburg, Germany
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Angnes RA, Li Z, Correia CRD, Hammond GB. Recent synthetic additions to the visible light photoredox catalysis toolbox. Org Biomol Chem 2015; 13:9152-67. [PMID: 26242759 DOI: 10.1039/c5ob01349f] [Citation(s) in RCA: 171] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The boom in visible light photoredox catalysis (VLPC) research has demonstrated that this novel synthetic approach is here to stay. VLPC enables reactive radical intermediates to be catalytically generated at ambient temperature, a feat not generally allowed through traditional pyrolysis- or radical initiator-based methodologies. VLPC has vastly extended the range of substrates and reaction schemes that have been traditionally the domain of radical reactions. In this review the photophysics background of VLPC will be briefly discussed, followed by a report on recent inroads of VLPC into decarboxylative couplings and radical C-H functionalization of aromatic compounds. The bulk of the review will be dedicated to advances in synergistic catalysis involving VLPC, namely the combination of photoredox catalysis with organocatalysis, including β-functionalization of carbonyl groups, functionalization of weak aliphatic C-H bonds, and anti-Markovnikov hydrofunctionalization of alkenes; dual catalysis with gold or with nickel, photoredox catalysis as an oxidation promoter in transition metal catalysis, and acid-catalyzed enantioselective radical addition to π systems.
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Affiliation(s)
- Ricardo A Angnes
- Chemistry Institute, State University of Campinas - Unicamp C.P. 6154, CEP. 13083-970, Campinas, São Paulo, Brazil
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Seo SW, Song HS, Song JH, Kim GH, In I, Park CP. Microreactor mediated deoxygenation of benzylic alcohols in a biphasic organic-aqueous medium. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.04.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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45
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Plutschack MB, Correia CA, Seeberger PH, Gilmore K. Organic Photoredox Chemistry in Flow. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_155] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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