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Palani P, Arumugam A, Raja D, Muthu K, Senadi GC. Photoredox-catalyzed 1,2-oxo-alkylation of vinyl arenes with 1,3-diketones: an approach to 1,4-dicarbonyls via C-C activation. Chem Commun (Camb) 2023; 59:11433-11436. [PMID: 37671608 DOI: 10.1039/d3cc02366d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
A mild and inexpensive approach to synthesising a series of 1,4-diketones in moderate to excellent yields via 1,2-oxo alkylation has been developed using fluorescein as a photocatalyst and air as an oxidant. The key features include (i) varied substrate scope (39 examples); (ii) good functional group tolerance; (iii) unsymmetrical 1,4-dicarbonyls; (iv) late-stage functionalization of thymol and ibuprofen derivatives; and (v) the synthetic expansion to 5- and 6-membered N-, O- and S-containing heterocycles.
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Affiliation(s)
- Pushbaraj Palani
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
| | - Ajithkumar Arumugam
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
| | - Dineshkumar Raja
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
| | - Kesavan Muthu
- Interdisciplinary Institute of Indian System of Medicine (IIISM), SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India
| | - Gopal Chandru Senadi
- Department of Chemistry, College of Engineering and Technology, SRM Institute of Science and Technology, SRM Nagar, Kattankulathur-603 203, Chengalpattu District, Tamil Nadu, India.
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Mondal S, Chatterjee N, Maity S. Recent Developments on Photochemical Synthesis of 1,n-Dicarbonyls. Chemistry 2023; 29:e202301147. [PMID: 37335758 DOI: 10.1002/chem.202301147] [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: 04/11/2023] [Revised: 06/19/2023] [Accepted: 06/19/2023] [Indexed: 06/21/2023]
Abstract
1,n-dicarbonyls are one of the most fascinating chemical feedstocks finding abundant usage in the field of pharmaceuticals. Besides, they are utilized in a plethora of synthesis in general synthetic organic chemistry. A number of 'conventional' methods are available for their synthesis, such as the Stetter reaction, Baker-Venkatraman rearrangement, oxidation of vicinal diols, and oxidation of deoxybenzoins, synonymous with unfriendly reagents and conditions. In the last 15 years or so, photocatalysis has taken the world of synthetic organic chemistry by a remarkable renaissance. It is fair to say now that everybody loves the light and photoredox chemistry has opened a new gateway to organic chemists towards milder, more simpler alternatives to the previously available methods, allowing access to many sensitive reactions and products. In this review, we present the readers with the photochemical synthesis of a variety of 1,n-dicarbonyls. Diverse photocatalytic pathways to these fascinating molecules have been discussed, placing special emphasis on the mechanisms, giving the reader an opportunity to find all these significant developments in one place.
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Affiliation(s)
- Subhashis Mondal
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
| | - Nirbhik Chatterjee
- Department of Chemistry, Kanchrapara College, North 24 Parganas, 743145, West Bengal, India
| | - Soumitra Maity
- Department of Chemistry & Chemical Biology, Indian Institute of Technology (ISM), Dhanbad, 826004, Jharkhand, India
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3
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Cheng YY, Hou HY, Liu Y, Yu JX, Chen B, Tung CH, Wu LZ. α-Acylation of Alkenes by a Single Photocatalyst. Angew Chem Int Ed Engl 2022; 61:e202208831. [PMID: 36202761 DOI: 10.1002/anie.202208831] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Indexed: 11/05/2022]
Abstract
A direct strategy for the difunctionalization of alkenes, with acylation occurring at the more substituted alkene position, would be attractive for complex ketone synthesis. We report herein a reaction driven by a single photocatalyst that enables α-acylation in this way with the introduction of a fluoromethyl, alkyl, sulfonyl or thioether group at the β-position of the alkene with high chemo- and regioselectivity under extremely mild conditions. Crucial to the success of this method are rate differences in the kinetics of radical generation through single-electron transfer (SET) between different radical precursors and the excited photocatalyst (PC*). Thus, the β-position of the alkene is first occupied by the group derived from the radical precursor that can be generated most readily, and α-keto acids could be used as an electrophilic reagent for the α-acylation of alkenes.
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Affiliation(s)
- Yuan-Yuan Cheng
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Hong-Yu Hou
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yu Liu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Ji-Xin Yu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Bin Chen
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Chen-Ho Tung
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Li-Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, The Chinese Academy of Sciences, Beijing, 100190, P. R. China.,School of Future Technology, University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
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Zhao F, Gu X, Franke R, Wu X. Copper‐Catalyzed 1,2‐Dicarbonylative Cyclization of Alkenes with Alkyl Bromides via Radical Cascade Process. Angew Chem Int Ed Engl 2022; 61:e202214812. [PMID: 36254794 PMCID: PMC10100518 DOI: 10.1002/anie.202214812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2022] [Indexed: 11/12/2022]
Abstract
Herein, we developed a new procedure on 1,2-dicarbonylative cyclization of 4-aryl-1-butenes with alkyl bromides. Using simple copper catalyst, two molecules of carbon monoxide were introduced into the double bond with the formation of four new C-C bonds and a new ring. Various α-tetralones and 2,3-dihydroquinolin-4-ones were formed in moderate to good yields.
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Affiliation(s)
- Fengqian Zhao
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
| | - Xing‐Wei Gu
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
| | - Robert Franke
- Evonik Performance Materials GmbH Paul-Baumann-Str. 1 45772 Marl Germany
- Lehrstuhl für Theoretische Chemie Ruhr-Universität Bochum 44780 Bochum Germany
| | - Xiao‐Feng Wu
- Leibniz-Institut für Katalyse e.V. 18059 Rostock Germany
- Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences 116023 Liaoning Dalian China
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Jia H, Ritter T. α-Thianthrenium Carbonyl Species: The Equivalent of an α-Carbonyl Carbocation. Angew Chem Int Ed Engl 2022; 61:e202208978. [PMID: 35895980 PMCID: PMC9804271 DOI: 10.1002/anie.202208978] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Indexed: 01/05/2023]
Abstract
Here we report an α-thianthrenium carbonyl species, as the equivalent of an α-carbonyl carbocation, which is generated by the radical conjugate addition of a trifluoromethyl thianthrenium salt to Michael acceptors. The reactivity allows for the synthesis of Cα -tetrasubstituted α- and β-amino acid analogues via a Ritter reaction by addition of acetonitrile. Addition of hydroxide, methoxide, and even fluoride can afford α-heteroatom substituted α-phenylpropanoates.
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Affiliation(s)
- Hao Jia
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany,Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Tobias Ritter
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
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Jia H, Ritter T. α‐Thianthrenium Carbonyl Species: The Equivalent of an α‐Carbonyl Carbocation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hao Jia
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Chemistry Kaiser-Wilhelm-Platz 1 45470 Muelheim an der Ruhr GERMANY
| | - Tobias Ritter
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Department of Organic Chemistry Kaiser-Wilhelm-Platz 1 45470 Muelheim an der Ruhr GERMANY
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