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Pham TT. Advances in Carbon‐Carbon Bond Activation by Using Photocatalysts: A Mini Review. ChemistrySelect 2022. [DOI: 10.1002/slct.202202679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Thuy Thanh Pham
- Department of Chemistry and Biochemistry New Mexico State University 1175 N Horseshoe Dr. Las Cruces NM 88003
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Das S, Vanderghinste J. Applications of Photoredox Catalysis for the Radical-Induced Cleavage of C–C Bonds. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1702-6193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractSelective cleavage of C–C bonds forms one of the greatest challenges in current organic chemistry, due to the relative strength of these bonds. However, such transformations are an invaluable instrument to break down and construct new carbon–carbon bonds. To achieve this, photochemistry can be used as a tool to generate radicals and induce the cleavage of these bonds due to their high reactivity. This review examines some of the most influential contributions in this field since 2010.1 Introduction2 C–C Bond Cleavage2.1 Homogeneous Catalyst2.1.1 N-Centered Radical2.2.2 O-Centered Radical2.2 Heterogeneous Catalyst3 C=C Bond Cleavage3.1 Homogeneous Catalyst3.2 Heterogeneous Catalyst4 C≡C Bond Cleavage4.1 Homogeneous Catalyst4.2 Heterogeneous Catalyst5 Conclusion
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Coppola GA, Pillitteri S, Van der Eycken EV, You SL, Sharma UK. Multicomponent reactions and photo/electrochemistry join forces: atom economy meets energy efficiency. Chem Soc Rev 2022; 51:2313-2382. [PMID: 35244107 DOI: 10.1039/d1cs00510c] [Citation(s) in RCA: 50] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Visible-light photoredox catalysis has been regarded as an extremely powerful tool in organic chemistry, bringing the spotlight back to radical processes. The versatility of photocatalyzed reactions has already been demonstrated to be effective in providing alternative routes for cross-coupling as well as multicomponent reactions. The photocatalyst allows the generation of high-energy intermediates through light irradiation rather than using highly reactive reagents or harsh reaction conditions. In a similar vein, organic electrochemistry has experienced a fruitful renaissance as a tool for generating reactive intermediates without the need for any catalyst. Such milder approaches pose the basis toward higher selectivity and broader applicability. In photocatalyzed and electrochemical multicomponent reactions, the generation of the radical species acts as a starter of the cascade of events. This allows for diverse reactivity and the use of reagents is usually not covered by classical methods. Owing to the availability of cheaper and more standardized photo- and electrochemical reactors, as well as easily scalable flow-setups, it is not surprising that these two fields have become areas of increased research interest. Keeping these in view, this review is aimed at providing an overview of the synthetic approaches in the design of MCRs involving photoredox catalysis and/or electrochemical activation as a crucial step with particular focus on the choice of the difunctionalized reagent.
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Affiliation(s)
- Guglielmo A Coppola
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
| | - Serena Pillitteri
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
| | - Erik V Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium. .,Peoples' Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Street, Moscow 117198, Russia
| | - Shu-Li You
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, China.
| | - Upendra K Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC), Department of Chemistry, University of Leuven (KU Leuven), Celestijnenlaan 200F, B-3001, Leuven, Belgium.
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Köhling J, Kalinovich N, Pajkert R, Tverdomed SN, Lork E, Wagner V, Röschenthaler G. Oxamates as 1,2‐Diketone Equivalents: The Effect of Fluorine. ChemistrySelect 2021. [DOI: 10.1002/slct.202100079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jonas Köhling
- Department of Physics & Earth Sciences Jacobs University Bremen Campus Ring 1 28759 Bremen Germany
| | - Nataliya Kalinovich
- Department of Life Sciences & Chemistry Jacobs University Bremen Campus Ring 1 28759 Bremen Germany
| | - Romana Pajkert
- Department of Life Sciences & Chemistry Jacobs University Bremen Campus Ring 1 28759 Bremen Germany
| | - Sergey N. Tverdomed
- Department of Life Sciences & Chemistry Jacobs University Bremen Campus Ring 1 28759 Bremen Germany
| | - Enno Lork
- Institute of Inorganic and Physical Chemistry University of Bremen Bibliothekstraße 1 28359 Bremen Germany
| | - Veit Wagner
- Department of Physics & Earth Sciences Jacobs University Bremen Campus Ring 1 28759 Bremen Germany
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Patel SM, P EP, Bakthadoss M, Sharada DS. Photocatalytic Visible-Light-Induced Nitrogen Insertion via Dual C(sp 3)-H and C(sp 2)-H Bond Functionalization: Access to Privileged Imidazole-based Scaffolds. Org Lett 2021; 23:257-261. [PMID: 33373256 DOI: 10.1021/acs.orglett.0c03269] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Here we have demonstrated a visible-light-mediated metal-free organic-dye-catalyzed dehydrogenative N-insertion leading to highly substituted imidazoles and privileged dihydroisoquinoline-based imidazole derivatives via C(sp3)-H and C(sp2)-H bond functionalization. A sustainable, convenient, metal-free azidation/C-H aminative cyclization approach in the absence of stoichiometric oxidants is presented. This protocol involves a rare photoinduced iminyl radical as a key intermediate for the "N" insertion.
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Affiliation(s)
- Srilaxmi M Patel
- Indian Institute of Technology (IIT) Hyderabad, Kandi, Sangareddy, Telangana 502 285, India
| | - Ermiya Prasad P
- Indian Institute of Technology (IIT) Hyderabad, Kandi, Sangareddy, Telangana 502 285, India
| | | | - Duddu S Sharada
- Indian Institute of Technology (IIT) Hyderabad, Kandi, Sangareddy, Telangana 502 285, India
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