1
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Shu L, Dong X, Sun ZH, Zhao A, Jiang M, Ren X, Yan F, Cao K, Liu Q, Liu H. Photoinduced Pd-Catalyzed Intramolecular 6- endo Heck Reaction of Alkyl Halides. Org Lett 2024. [PMID: 38941533 DOI: 10.1021/acs.orglett.4c01821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
A novel photocatalytic palladium-induced 6-endo-selective alkyl Heck reaction of unactivated alkyl iodides and alkyl bromides has been described. This strategy facilitates the gentle and efficient synthesis of a variety of 5-phenyl-1,2,3,6-tetrahydropyridine derivatives. It demonstrates a broad substrate tolerance and excellent 6-endo selectivity. Unlike the high-temperature requirements of traditional alkyl Heck reactions, this transformation efficiently proceeds at room temperature and shows significant promise for industrial-scale applications. Mechanistic investigations reveal that this alkyl Heck reaction proceeds via a hybrid palladium-radical process.
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Affiliation(s)
- Long Shu
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
| | - Xu Dong
- School of Pharmacy, Qilu Medical University, 1678 West Renmin Road, Zibo 255300, China
| | - Ze-Hua Sun
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
| | - Anxin Zhao
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
| | - Mengyao Jiang
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
| | - Xiaomin Ren
- Shinva Medical Instrument Co., Ltd., 99 Beixin Road, Sibaoshan Street, Zibo 255000, China
| | - Fachao Yan
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
| | - Kai Cao
- Pharmacy Department, Zibo Central Hospital, 54 West Gongqingtuan Road, Zibo 255036, China
| | - Qing Liu
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
| | - Hui Liu
- School of Chemical Engineering, Shandong University of Technology, 266 West Xincun Road, Zibo 255049, P. R. China
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2
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Sui X, Dang HT, Porey A, Trevino R, Das A, Fremin SO, Hughes WB, Thompson WT, Dhakal SK, Arman HD, Larionov OV. Acridine photocatalysis enables tricomponent direct decarboxylative amine construction. Chem Sci 2024; 15:9582-9590. [PMID: 38939159 PMCID: PMC11206229 DOI: 10.1039/d4sc02356k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 05/20/2024] [Indexed: 06/29/2024] Open
Abstract
Amines are centrally important motifs in medicinal chemistry and biochemistry, and indispensable intermediates and linchpins in organic synthesis. Despite their cross-disciplinary prominence, synthetic access to amine continues to rely on two-electron approaches based on reductions and additions of organometallic reagents, limiting their accessible chemical space and necessitating stepwise preassembly of synthetic precursors. We report herein a homogeneous photocatalytic tricomponent decarboxylative radical-mediated amine construction that enables modular access to α-branched secondary amines directly from the broad and structurally diverse chemical space of carboxylic acids in a tricomponent reaction with aldehydes and aromatic amines. Our studies reveal the key role of acridine photocatalysis acting in concert with copper and Brønsted acid catalytic processes in facilitating the previously inaccessible homogeneous photocatalytic reaction and provide a streamlined segue to a wide range of amines and nonproteinogenic α-amino acids.
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Affiliation(s)
- Xianwei Sui
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Hang T Dang
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Arka Porey
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Ramon Trevino
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Arko Das
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Seth O Fremin
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - William B Hughes
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - William T Thompson
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Shree Krishna Dhakal
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Hadi D Arman
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
| | - Oleg V Larionov
- Department of Chemistry, The University of Texas at San Antonio One UTSA Circle San Antonio TX 78249 USA
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3
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Yamada K, Cheung KPS, Gevorgyan V. General Regio- and Diastereoselective Allylic C-H Oxygenation of Internal Alkenes. J Am Chem Soc 2024. [PMID: 38922638 DOI: 10.1021/jacs.4c06421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
Branched allylic esters and carboxylates are fundamental motifs prevalent in natural products and drug molecules. The direct allylic C-H oxygenation of internal alkenes represents one of the most straightforward approaches, bypassing the requirement for an allylic leaving group as in the classical Tsuji-Trost reaction. However, current methods suffer from limited scope─often accompanied by selectivity issues─thus hampering further development. Herein we report a photocatalytic platform as a general solution to these problems, enabling the coupling of diverse internal alkenes with carboxylic acids, alcohols, and other O-nucleophiles, typically in a highly regio- and diastereoselective manner.
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Affiliation(s)
- Kyohei Yamada
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
| | - Kelvin Pak Shing Cheung
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080-3021, United States
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4
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Yang J, Li CR, Guo X, Chen Z, Hu K, Li LX. Photoinduced Palladium-Catalyzed 1,2-Aminoalkylation of Aromatic Alkenes with Hydroxyl as the Directing Group. Org Lett 2024; 26:5110-5114. [PMID: 38848135 DOI: 10.1021/acs.orglett.4c01389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2024]
Abstract
The hybrid nature of Pd(I)-alkyl radical species has enabled a wide array of radical-based transformations. However, in this transformation, the secondary Pd(I)-alkyl radical species are prone to recombining into Pd(II)-alkyl species to give Heck-type products via β-H loss. Herein, we report a visible-light-induced, three-component Pd-catalyzed 1,2-aminoalkylation of alkenes with readily available alkyl halides and amines to construct C-C and C-N bonds simultaneously. Mechanistic investigation shows that the intermediate of o-quinone methide produced is the key factor in the transformation.
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Affiliation(s)
- Jing Yang
- Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Chen-Rui Li
- Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Xu Guo
- Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Zhuo Chen
- Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Kai Hu
- Henan University of Chinese Medicine, Zhengzhou 450046, China
| | - Li-Xin Li
- Henan University of Chinese Medicine, Zhengzhou 450046, China
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5
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Zhan X, Nie Z, Li N, Zhou A, Lv H, Liang M, Wu K, Cheng GJ, Yin Q. Catalytic Asymmetric Cascade Dearomatization of Indoles via a Photoinduced Pd-Catalyzed 1,2-Bisfunctionalization of Butadienes. Angew Chem Int Ed Engl 2024; 63:e202404388. [PMID: 38641988 DOI: 10.1002/anie.202404388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2024] [Revised: 04/17/2024] [Accepted: 04/19/2024] [Indexed: 04/21/2024]
Abstract
Photoinduced Pd-catalyzed bisfunctionalization of butadienes with a readily available organic halide and a nucleophile represents an emerging and attractive method to assemble versatile alkenes bearing various functional groups at the allylic position. However, enantiocontrol and/or diastereocontrol in the C-C or C-X bond-formation step have not been solved due to the open-shell process. Herein, we present a cascade asymmetric dearomatization reaction of indoles via photoexcited Pd-catalyzed 1,2-biscarbonfunctionalization of 1,3-butadienes, wherein asymmetric control on both the nucleophile and electrophile part is achieved for the first time in photoinduced bisfunctionalization of butadienes. This method delivers structurally novel chiral spiroindolenines bearing two contiguous stereogenic centers with high diastereomeric ratios (up to >20 : 1 dr) and good to excellent enantiomeric ratios (up to 97 : 3 er). Experimental and computational studies of the mechanism have confirmed a radical pathway involving excited-state palladium catalysis. The alignment and non-covalent interactions between the substrate and the catalyst were found to be essential for stereocontrol.
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Affiliation(s)
- Xiaohang Zhan
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
| | - Zhiwen Nie
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
| | - Na Li
- Warshel Institute for Computational Biology, School of Medicine, The Chinese University of Hong Kong, 518172, Shenzhen, Guangdong, P. R. China
| | - Ao Zhou
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
| | - Haotian Lv
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
| | - Mingrong Liang
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
| | - Keqin Wu
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
| | - Gui-Juan Cheng
- Warshel Institute for Computational Biology, School of Medicine, The Chinese University of Hong Kong, 518172, Shenzhen, Guangdong, P. R. China
| | - Qin Yin
- Shenzhen University of Advanced Technology, and Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, 518055, Shenzhen, P. R. China
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6
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Newar UD, Boruah DJ, Bhuyan A, Nayak A, Maurya RA. Visible-light-induced copper-catalyzed oxidative esterification of α-azidoketones with diazoacetates: access to α-acyloxyacetates. Org Biomol Chem 2024. [PMID: 38881326 DOI: 10.1039/d4ob00590b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
A copper(II)-catalyzed 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)-mediated synthesis of α-acyloxyacetates from α-azidoketones and diazoacetates under visible light at room temperature is described. This reaction involves an oxidative esterification process, leading to the formation of two new C-O bonds with the elimination of dinitrogen molecules in the overall process. 20 examples of α-acyloxyacetates were synthesized in high yields (70-86%) by coupling various α-azidoketones with diazoacetates. α-Azidoketones containing electron-donating groups (Me, MeO), electron-withdrawing groups (CN, NO2), halogen atoms (Cl, Br), and other aryl groups are compatible with various substituted diazoacetates (ethyl, tertiary butyl, benzyl), resulting in the formation of α-acyloxyacetates.
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Affiliation(s)
- Uma Devi Newar
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, Assam, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Dhruba Jyoti Boruah
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, Assam, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Arnav Bhuyan
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, Assam, India.
| | - Abhimanyu Nayak
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, Assam, India.
| | - Ram Awatar Maurya
- Applied Organic Chemistry Group, Chemical Sciences & Technology Division, CSIR-North East Institute of Science & Technology (NEIST), Jorhat-785006, Assam, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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7
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Melder JJ, Heldner ML, Kugler R, Ziegenhagen LA, Rominger F, Rudolph M, Hashmi ASK. Easy Access to Functionalized Indolines and Tetrahydroquinolines via a Photochemical Cascade Cyclization Reaction. J Am Chem Soc 2024; 146:14521-14527. [PMID: 38743878 DOI: 10.1021/jacs.4c00962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Herein, the development of a light-mediated synthesis of functionalized indolines and tetrahydroquinolines is reported. These structural motifs are considered as highly valuable targets, attributed to their widespread occurrence in pharmaceuticals and natural products. The gold-mediated approach offers a direct route to functionalized indolines in yields of up to 81% under mild photochemical conditions. Thereby, easily accessible Boc-protected N-aryl-allylamine and homoallylamine derivatives were reacted with sp3-hybridized haloalkanes in an intermolecular cascade cyclization reaction. A broad scope of substrates, including a variety of different substituents on the aromatic backbone as well as various haloalkanes, could be utilized. Indoline derivatives, which are functionalized in position 2, are also accessible by applying ortho-allylic anilines. Moreover, the synthetic appeal was demonstrated for a total synthesis of the anti-inflammatory agent AN669 in three reaction steps in an overall yield of 64%.
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Affiliation(s)
- Julian J Melder
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Maxi L Heldner
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Robin Kugler
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Levi A Ziegenhagen
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Frank Rominger
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
| | - A Stephen K Hashmi
- Organisch-Chemisches Institut, Heidelberg University, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
- Chemistry Department, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
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8
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Liu C, Ma Y, Lian R, Chen J, Yang M, Cheng J. Regulation of Photogenerated Redox Species through High Crystallinity Carbon Nitride for Improved C-S Coupling Reactions. CHEMSUSCHEM 2024; 17:e202301882. [PMID: 38242851 DOI: 10.1002/cssc.202301882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 01/14/2024] [Accepted: 01/19/2024] [Indexed: 01/21/2024]
Abstract
A novel and efficient approach for the synthesis of α, β-unsaturated sulfones through heterogeneous photocatalyzed C-S coupling reactions have been developed. The use of molten-salt method derived carbon nitride (MCN), a transition metal-free polymeric photocatalyst, combined with enhanced crystallinity and potassium iodide as an additive, effectively modulates photogenerated reactive redox species, markedly increasing the overall reaction selectivity. This method achieves the shortest reaction time (2 h) with high yield (up to 95 %) among the reported heterogeneous catalytic C-S bond formation reactions, matching the efficiency of the homogeneous photocatalysts. Furthermore, the application to challenging alkyne substrates has been demonstrated, underscoring the potential for a broad range of applications in pharmaceutical research and synthetic chemistry.
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Affiliation(s)
- Chen Liu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou University, Fuzhou, 350116, China
| | - Yukun Ma
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou University, Fuzhou, 350116, China
| | - Ronghong Lian
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou University, Fuzhou, 350116, China
| | - Jiayin Chen
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou University, Fuzhou, 350116, China
| | - Mingcheng Yang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou University, Fuzhou, 350116, China
| | - Jiajia Cheng
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou University, Fuzhou, 350116, China
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9
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Yang S, Cai SS, Li JH, Chen M. Photoinduced Palladium-Catalyzed Radical Heck-Type Coupling of Cyclobutanone Oxime Esters with Vinyl Arenes. J Org Chem 2024; 89:7243-7254. [PMID: 38696261 DOI: 10.1021/acs.joc.4c00703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2024]
Abstract
A palladium-catalyzed radical Heck-type coupling reaction of cyclobutanone oxime esters with olefins under visible-light irradiation has been developed. The cyanoalkyl/Pd(I) hybrid species generated by selected ring-opening C-C bond cleavage of imino/Pd(I) species reacted smoothly with vinyl arenes, delivering the cyanoalkylation olefins under mild conditions. This elegant strategy has a broad scope and functional group tolerance. Subsequently, late-stage functionalization of bioactive molecules and synthetic transformations of the product further confirm the practicality.
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Affiliation(s)
- Sen Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Sha-Sha Cai
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Jun-Hua Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Ming Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
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10
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Porey A, Fremin SO, Nand S, Trevino R, Hughes WB, Dhakal SK, Nguyen VD, Greco SG, Arman HD, Larionov OV. Multimodal Acridine Photocatalysis Enables Direct Access to Thiols from Carboxylic Acids and Elemental Sulfur. ACS Catal 2024; 14:6973-6980. [PMID: 38737399 PMCID: PMC11081195 DOI: 10.1021/acscatal.4c01289] [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] [Indexed: 05/14/2024]
Abstract
Development of photocatalytic systems that facilitate mechanistically divergent steps in complex catalytic manifolds by distinct activation modes can enable previously inaccessible synthetic transformations. However, multimodal photocatalytic systems remain understudied, impeding their implementation in catalytic methodology. We report herein a photocatalytic access to thiols that directly merges the structural diversity of carboxylic acids with the ready availability of elemental sulfur without substrate preactivation. The photocatalytic transformation provides a direct radical-mediated segue to one of the most biologically important and synthetically versatile organosulfur functionalities, whose synthetic accessibility remains largely dominated by two-electron-mediated processes based on toxic and uneconomical reagents and precursors. The two-phase radical process is facilitated by a multimodal catalytic reactivity of acridine photocatalysis that enables both the singlet excited state PCET-mediated decarboxylative carbon-sulfur bond formation and the previously unknown radical reductive disulfur bond cleavage by a photoinduced HAT process in the silane-triplet acridine system. The study points to a significant potential of multimodal photocatalytic systems in providing unexplored directions to previously inaccessible transformations.
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Affiliation(s)
- Arka Porey
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Seth O Fremin
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Sachchida Nand
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Ramon Trevino
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - William B Hughes
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Shree Krishna Dhakal
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Viet D Nguyen
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Samuel G Greco
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Hadi D Arman
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Oleg V Larionov
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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11
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Xu S, Li M, Zhou B, Duan C, Zou F, Zou S, Long X, Chen G, Yan K. CuCl 2/FeCl 3 Bimetallic Photocatalyst for Sustainable Ethylene Production from Ethanol via Recoverable Redox Cycles. J Phys Chem Lett 2024; 15:4640-4646. [PMID: 38647347 DOI: 10.1021/acs.jpclett.4c00588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2024]
Abstract
Photocatalytic conversions of ethanol to valuable chemicals are significant organic synthesis reactions. Herein, we developed a CuCl2/FeCl3 bimetallic photocatalyst for sustainable dehydration of ethanol to ethylene by recoverable redox cycles. The selectivity of ethylene was 98.3% for CuCl2/FeCl3, which is much higher than that of CuCl2 (34.5%) and FeCl3 (86.5%). Due to the ligand-to-metal charge transfer (LMCT) process involved in generating the liquid products, the CuCl2/FeCl3 catalyst will be reduced to CuCl/FeCl2. Oxygen (O2) is required for the recovery of CuCl2/FeCl3 to avoid exhaustion. The soluble Fe3+/Fe2+ redox species deliver catalyst regeneration properties more efficiently than single metal couples, making a series of redox reactions (Cu2+/Cu+, Fe3+/Fe2+, and O2/ethanol couples) recyclable with synergistic effects. A flow reactor was designed to facilitate the continuous production of ethylene. The understanding of bimetallic synergism and consecutive reactions promotes the industrial application process of photocatalytic organic reactions.
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Affiliation(s)
- Shuang Xu
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Mingjie Li
- College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Biao Zhou
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Chenghao Duan
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Feilin Zou
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Shibing Zou
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Xia Long
- Low Carbon College, Shanghai Jiaotong University, Shanghai 201306, China
| | - Guangxu Chen
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
| | - Keyou Yan
- School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou 510000, China
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12
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Tan HB, Liu YS, Zhou JY, Cao M, Lei T, Ren SY, Lin CQ, Yang YF, Hu ZL, Xu ZG, Tang DY, Chen ZZ, Qu XY. Tandem Vinylogous Aldol and Intramolecular [2 + 2] Cycloaddition toward Benzocyclobutenes by UV Light Photocatalysis. Org Lett 2024; 26:3304-3309. [PMID: 38587334 DOI: 10.1021/acs.orglett.4c00994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
A facile and efficient radical tandem vinylogous aldol and intramolecular [2 + 2] cycloaddition reaction for direct synthesis of cyclobutane-containing benzocyclobutenes (BCBs) under extremely mild conditions without using any photocatalysts is reported. This approach exhibited definite compatibility with functional groups and afforded new BCBs with excellent regioselectivity and high yields. Moreover, detailed mechanism studies were carried out both experimentally and theoretically. The readily accessible, low-cost, and ecofriendly nature of the developed strategy will endow it with attractive applications in organic and medicinal chemistry.
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Affiliation(s)
- Hong-Bo Tan
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
- Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China
| | - Ying-Shan Liu
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Jia-Ying Zhou
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Man Cao
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Tong Lei
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Si-Ying Ren
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Chang-Qiu Lin
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Yi-Fan Yang
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Zhang-Liang Hu
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Zhi-Gang Xu
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Dian-Yong Tang
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Zhong-Zhu Chen
- National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Engineering Laboratory of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing Collaborative Innovation Center of Targeted and Innovative Therapeutics, College of Pharmacy & IATTI, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Xian-You Qu
- Chongqing Academy of Chinese Materia Medica, Chongqing 400065, China
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13
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Du YJ, Sheng XX, Tang LN, Chen JM, Liu GY, Hu H, Yang S, Zhu L, Chen M. Accessing Benzoazepine Derivatives via Photoinduced Radical Relay Formal [5 + 2] Reaction of Amide/Alkyne Enabled by Palladium Catalysis. Org Lett 2024; 26:2662-2667. [PMID: 38530133 DOI: 10.1021/acs.orglett.4c00979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2024]
Abstract
A novel class of alkyne-tethered amides facilitates an unprecedented photoinduced palladium-catalyzed radical relay formal [5 + 2] reaction. This innovative strategy allows for the rapid construction of diverse fused benzoazepine structures, yielding structurally novel and compelling compounds. With a broad substrate scope and excellent functional group tolerance, the methodology synthesizes biologically active compounds. Notably, the resulting tricyclic benzo[b]azepines offer diversification opportunities through simple transformations. DFT calculations elucidate a seven-membered ring closure mechanism involving the alkenyl radical and Pd(I) rebound alongside a concerted metalation-deprotonation (CMD) process.
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Affiliation(s)
- Yu-Jia Du
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Xia-Xin Sheng
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Lu-Ning Tang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Jia-Ming Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Guo-Ying Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Hao Hu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Sen Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
| | - Lei Zhu
- College of Pharmacy, Army Medical University, No. 30 Gaotanyan Street, Chongqing 400038, China
| | - Ming Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Petrochemical Engineering, Changzhou University, 21 Gehu Road, Changzhou 213164, China
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14
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Zhou Y, Wang Y, Xu P, Han W, Xiong HY, Zhang G. Synthesis of Indolyl Phenyl Diketones through Visible-Light-Promoted Ni-Catalyzed Intramolecular Cyclization/Oxidation Sequence of Ynones. ACS ORGANIC & INORGANIC AU 2024; 4:241-247. [PMID: 38585509 PMCID: PMC10995934 DOI: 10.1021/acsorginorgau.3c00060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 04/09/2024]
Abstract
The combination of visible light catalysis and Ni catalysis has enabled the synthesis of indolyl phenyl diketones through the cyclization/oxidation process of ynones. This reaction proceeded under mild and base-free conditions and showed a broad scope and feasibility for gram-scale synthesis. Several natural products and biologically interesting molecules could be readily postfunctionalized by this method.
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Affiliation(s)
- Yufeng Zhou
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Yaping Wang
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Peidong Xu
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Weiwei Han
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Heng-Ying Xiong
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
| | - Guangwu Zhang
- College
of Chemistry and Chemical Engineering, Henan
University, Kaifeng, 475004, P. R.
China
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15
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Cai Y, Gaurav G, Ritter T. 1,4-Aminoarylation of Butadienes via Photoinduced Palladium Catalysis. Angew Chem Int Ed Engl 2024; 63:e202311250. [PMID: 38334292 DOI: 10.1002/anie.202311250] [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: 08/03/2023] [Revised: 02/01/2024] [Accepted: 02/02/2024] [Indexed: 02/10/2024]
Abstract
A visible-light-induced, three-component palladium-catalyzed 1,4-aminoarylation of butadienes with readily available aryl halides and aliphatic amines has been developed, affording allylamines with excellent E-selectivity. The reaction exhibits exceptional control over chemo-, regio-, and stereoselectivity, a broad substrate scope, and high functional group compatibility, as demonstrated by the late-stage functionalization of bioactive molecules. Mechanistic investigations are consistent with a photoinduced radical Pd(0)-Pd(I)-Pd(II)-Pd(0) Heck-Tsuji-Trost allylation cascade.
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Affiliation(s)
- Yuan Cai
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany
| | - Gaurav Gaurav
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany
| | - Tobias Ritter
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470, Mülheim an der Ruhr, Germany
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16
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Fan Q, Jiang K, Liu B, Jiang H, Cao X, Yin B. Radical-Dearomative Generation of Cyclohexadienyl Pd(II) toward the 3D Transformation of Nonactivated Phenyl Rings. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024; 11:e2307074. [PMID: 38102822 PMCID: PMC10916580 DOI: 10.1002/advs.202307074] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 11/25/2023] [Indexed: 12/17/2023]
Abstract
Traditional palladium-catalyzed dearomatization of (hetero)arenes takes place via an ionic pathway and usually requires elevated temperatures to overcome the energy barrier of the dearomative insertion step. Herein, a combination of the radical and two-electron pathways is disclosed, which enables room temperature dearomative 3D transformations of nonactivated phenyl rings with Pd(0) as the catalyst. Experimental results together with density functional theory (DFT) calculations indicate a versatile π-allyl Pd(II) species, cyclohexadienyl Pd(II), possibly is involved in the dearomatization. This species is generated by combining the cyclohexadienyl radical and Pd(I). The cyclohexadienyl Pd(II) provides chemoselective (carboamination and trieneylation), regioselective (1,2-carboamination), and diastereoselective (carbonyl-group directed face selectivity) conversions.
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Affiliation(s)
- Qi Fan
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology (SCUT)Guangzhou510640China
| | - Kai Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology (SCUT)Guangzhou510640China
| | - Bo Liu
- The Second Clinical Medical Collegeand State Key Laboratory of Dampness Syndrome of Chinese MedicineGuangzhou University of Chinese MedicineGuangzhou510006China
| | - Huanfeng Jiang
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology (SCUT)Guangzhou510640China
| | - Xiaohui Cao
- School of PharmacyGuangdong Pharmaceutical UniversityGuangzhou510006China
| | - Biaolin Yin
- Key Laboratory of Functional Molecular Engineering of Guangdong ProvinceSchool of Chemistry and Chemical EngineeringSouth China University of Technology (SCUT)Guangzhou510640China
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17
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Sarkar S, Cheung KPS, Gevorgyan V. Recent Advances in Visible Light Induced Palladium Catalysis. Angew Chem Int Ed Engl 2024; 63:e202311972. [PMID: 37957126 PMCID: PMC10922525 DOI: 10.1002/anie.202311972] [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: 08/18/2023] [Revised: 11/10/2023] [Accepted: 11/13/2023] [Indexed: 11/15/2023]
Abstract
Visible light-induced Pd catalysis has emerged as a promising subfield of photocatalysis. The hybrid nature of Pd radical species has enabled a wide array of radical-based transformations otherwise challenging or unknown via conventional Pd chemistry. In parallel to the ongoing pursuit of alternative, readily available radical precursors, notable discoveries have demonstrated that photoexcitation can alter not only oxidative addition but also other elementary steps. This Minireview highlights the recent progress in this area.
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Affiliation(s)
- Sumon Sarkar
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX 75080 (USA)
| | - Kelvin Pak Shing Cheung
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX 75080 (USA)
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, TX 75080 (USA)
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18
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Shah JA, Banerjee A, Mukherjee U, Ngai MY. Merging Excited-State Copper Catalysis and Triplet Nitro(hetero)arenes for Direct Synthesis of 2-Aminophenol Derivatives. Chem 2024; 10:686-697. [PMID: 38405332 PMCID: PMC10882994 DOI: 10.1016/j.chempr.2023.11.005] [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] [Indexed: 02/27/2024]
Abstract
Nitro(hetero)arene derivatives are essential commodity chemicals used in various products, such as drugs, polymers, and agrochemicals. In this study, we leverage the excited-state reactivities of copper catalysts and nitro(hetero)arenes, and the Umpolung reactivity of acyl radicals to convert readily available nitro(hetero)arenes directly to valuable 2-aminophenol derivatives, which are important scaffolds in many top-selling pharmaceuticals. This reaction is applicable to a variety of nitro(hetero)arenes, acyl chlorides, and late-stage modifications of complex molecules, making it a useful tool for the discovery of new functional molecules. Mechanistic studies, including radical trapping experiments, Stern Volmer quenching studies, light ON/OFF experiments, and 18O-labeling studies, suggest a reaction mechanism involving photoexcitation of a copper complex, diradical couplings, and an in-cage contact ion pair (CIP) migration. Our findings offer a streamlined protocol for synthesizing essential pharmacophores from nitro(hetero)arenes while simultaneously advancing knowledge in excited-state and radical chemistry and stimulating new reaction design and development.
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Affiliation(s)
- Jagrut A. Shah
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794, United States
| | - Arghya Banerjee
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794, United States
| | - Upasana Mukherjee
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794, United States
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907, United States
| | - Ming-Yu Ngai
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794, United States
- Institute of Chemical Biology and Drug Discovery, State University of New York, Stony Brook, New York 11794, United States
- Department of Chemistry, Purdue University, West Lafayette, Indiana, 47907, United States
- Lead Contact
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19
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Paul S, Panja S, Hazra N, Gayen K, Banerjee A. Carbon Dot as Visible-Light Photoredox Catalysts for a Myriad of Organic Transformations. J Org Chem 2024; 89:91-100. [PMID: 38113131 DOI: 10.1021/acs.joc.3c01698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Metal-free catalysts for various organic transformations are of high demand now. In this study, we present a new carbon dot as an efficient metal-free nanophotocatalyst for carrying out a series of organic bond formation reactions. Using a single photocatalyst carbon dot, Csp2-Csp2, Csp2-B, Csp2-S, Csp2-Se, and C-P bond formation reactions were performed with a high yield of the corresponding products. Moreover, Csp2-H activation of the aromatic ring was achieved by merging the carbon dot photocatalyst with a transition metal. Interestingly, these carbon nanodot-based catalysts show good recyclability a few times without any significant loss of catalytic activity. The development of catalytic systems based on carbon dots has its merits vested in the advantageous properties of this nanomaterial, such as a robust chemical nature and cheap cost of preparation. This report demonstrates that a carbon dot indeed holds the potential to replace expensive metal-based catalysts as well as organic dyes in five different photoredox reactions.
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Affiliation(s)
- Subir Paul
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Subir Panja
- School of Chemical Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Niladri Hazra
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Kousik Gayen
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
| | - Arindam Banerjee
- School of Biological Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata 700032, India
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20
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Ravindra S, Natarajan K, Padma Priya VR, Kataria R, Nandi GC. Visible Light Mediated Co-Catalyzed Isocyanide Insertion with Sulfonyl Azide: Synthesis of Sulfonyl Carbamimidic Azide and Sulfonyl Aminotetrazole via Carbodiimide Intermediate. Chemistry 2023; 29:e202303153. [PMID: 37878800 DOI: 10.1002/chem.202303153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Revised: 10/24/2023] [Accepted: 10/25/2023] [Indexed: 10/27/2023]
Abstract
Herein, we report an operationally simple and efficient protocol to prepare sulfonyl carbamimidic azide and N-sulfonyl aminotetrazole via Co-catalyzed three component coupling of sulfonyl azide (acts as nitrene source), isocyanide, and TMS-azide at room temperature under visible light. Initially, the carbamimidic azide is formed, which cyclizes only in the presence of base to deliver N-sulfonyl aminotetrazole in very good yields. The sulfonyl aminotetrazole can also be synthesized directly without isolating the carbamimidic azide in the presence of base. The sulfonyl azide is anticipated to generate nitrene and reacts with isocyanide to produce carbodiimide. Subsequent addition of azide (TMS-N3 ) to carbodiimide results in the formation of carbamimidic azide.
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Affiliation(s)
- Sundaresan Ravindra
- Department of Chemistry, National Institute of Technology- Tiruchirappalli, Tiruchirappalli, Tamilnadu, 620 015, India
| | - Kannan Natarajan
- Department of Chemistry, National Institute of Technology- Tiruchirappalli, Tiruchirappalli, Tamilnadu, 620 015, India
| | - Vetrivel R Padma Priya
- Department of Chemistry, National Institute of Technology- Tiruchirappalli, Tiruchirappalli, Tamilnadu, 620 015, India
| | - Ramesh Kataria
- Department of Chemistry and Centre for Advanced Studies in Chemistry, Panjab University, Chandigarh, 160014, India
| | - Ganesh Chandra Nandi
- Department of Chemistry, National Institute of Technology- Tiruchirappalli, Tiruchirappalli, Tamilnadu, 620 015, India
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21
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Zhang Z, Gevorgyan V. Escape from Hydrofunctionalization: Palladium Hydride-Enabled Difunctionalization of Conjugated Dienes and Enynes. Angew Chem Int Ed Engl 2023; 62:e202311848. [PMID: 37788158 PMCID: PMC10842412 DOI: 10.1002/anie.202311848] [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: 08/15/2023] [Revised: 09/23/2023] [Accepted: 09/27/2023] [Indexed: 10/05/2023]
Abstract
Palladium hydrides are traditionally employed in hydrofunctionalization (i.e. monofunctionalization) of conjugated dienes and enynes, owning to its facile protic hydropalladation of electron-rich (or neutral) unsaturated bonds. Herein, we report a mild PdH-catalyzed difunctionalization of conjugated dienes and enynes. This protocol is enabled by the chemoselectivity switch of the initial hydropalladation step achieved by visible light enhancement of hydricity of PdH species. This method allows for cascade annulation of dienes and enynes with various easily available and abundant substrates, such as acrylic acids, acrylic amides, and Baylis-Hillman adducts, toward a wide range of alkenyl or alkynyl lactones, lactams, and tetrahydrofurans. This protocol also provides an easy access to complex spiro-fused tricyclic frameworks.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas, 75080, USA
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas, 75080, USA
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22
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Dolcini L, Gandini T, Castiglioni R, Bossi A, Penconi M, Dal Corso A, Gennari C, Pignataro L. Visible Light-Promoted β-Functionalization of Carbonyl Compounds in the Presence of Organic Dyes. J Org Chem 2023; 88:14283-14291. [PMID: 37792665 PMCID: PMC10594657 DOI: 10.1021/acs.joc.3c00890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Indexed: 10/06/2023]
Abstract
Herein, we investigate the use of organic photocatalysts in the visible light-promoted β-functionalization of carbonyl compounds. In particular, we studied the addition of aliphatic aldehydes to α,β-unsaturated compounds (β-Michael addition), and the reaction of cyclic ketones with either ketones (β-aldol condensation) or imines (β-Mannich reaction). Among the dyes tested, donor-acceptor cyanoarenes gave the best results, promoting the transformations of interest in moderate to good yields. The reaction scope was investigated on substrates with different steric and electronic properties. Fluorescence quenching analysis (Stern-Volmer experiments) led us to propose for these reactions a reductive quenching mechanism involving a transient 5πe- activation mode.
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Affiliation(s)
- Luigi Dolcini
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Tommaso Gandini
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Riccardo Castiglioni
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Alberto Bossi
- Istituto
di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
del Consiglio Nazionale delle Ricerche (CNR), via Fantoli 16/15; SmartMatLab Center, via C. Golgi
19, Milano 20138, Italy
| | - Marta Penconi
- Istituto
di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
del Consiglio Nazionale delle Ricerche (CNR), via Fantoli 16/15; SmartMatLab Center, via C. Golgi
19, Milano 20138, Italy
| | - Alberto Dal Corso
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Cesare Gennari
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
| | - Luca Pignataro
- Dipartimento
di Chimica, Università degli Studi
di Milano, via C. Golgi 19, Milano 20133, Italy
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23
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Hu GQ, Zhang WY, Liu YX, Liu JH, Zhao B. Visible Light-Accelerated Palladium-Catalyzed Thiocarbonylation Using Oxalic Acid Monothioester with Aryl/Alkenyl Sulfonium Salts. J Org Chem 2023; 88:14351-14356. [PMID: 37802501 DOI: 10.1021/acs.joc.3c01173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Herein, we present a decarboxylative thiocarbonylation of aryl and alkenyl sulfonium salts with oxalic acid monothioethers (OAMs), which can be achieved by visible light-accelerated palladium catalysis. Sulfonium salts are widely available, and OAM is an easily accessible and stored reagent; this mild reaction method can also be used for the synthesis of different types of thioester compounds. The reaction represents a new application of visible light-accelerated palladium catalysis in catalytic decarboxylative cross-couplings.
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Affiliation(s)
- Guo-Qin Hu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Wen-Yan Zhang
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yong-Xin Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Jing-Hui Liu
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Bin Zhao
- School of Chemical Engineering, Zhengzhou University, Zhengzhou 450001, China
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24
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López-López JC, Bautista D, González-Herrero P. Photoinduced Reductive C-C and C-Heteroatom Couplings from Bis-cyclometalated Pt(IV) Alkynyl Complexes. Inorg Chem 2023; 62:14411-14421. [PMID: 37616569 PMCID: PMC10481375 DOI: 10.1021/acs.inorgchem.3c02162] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Indexed: 08/26/2023]
Abstract
Unsymmetrical dicarboxylato complexes [Pt(tpy)2(O2CR)2] [tpy = cyclometalated 2-(p-tolyl)pyridine, R = Me, CF3] react with the terminal alkynes 4-methoxyphenylacetylene, phenylacetylene, 4-(trifluoromethyl)phenylacetylene or 3,5-difluorophenylacetylene in the presence of a base to produce complexes mer-[Pt(tpy)2(O2CR)(CCAr)], in which the metalated carbon atoms are in a meridional arrangement. Irradiation of the trifluoroacetato derivatives with a 365 nm LED source leads to isomerization to the facial complexes, which can be converted to chlorido derivatives upon reaction with NH4Cl. In contrast, irradiation of the acetato derivatives leads to four different processes, namely, reduction to cis-[Pt(tpy)2], annulations involving one of the tpy ligands and the Cα and Cβ atoms of the alkynyl to give benzoquinolizinium derivatives, isomerization to the facial geometry, or C-O couplings between the acetato ligand and one tpy. The first two processes are favored by the presence of electron-donating groups on the alkynyl, whereas electron-withdrawing groups favor the last two. Irradiation of complexes fac-[Pt(tpy)2(O2CCF3)(CCAr)] with a medium-pressure Hg UV lamp leads to a reductive C-C coupling involving the alkynyl Cα atom and one of the tpy ligands to give pyridoisoindolium derivatives, except for the methoxyphenylacetylide derivative, which is photostable. On the basis of TDDFT calculations, the photoreactivity of the mer complexes is attributed to 3LLCT [π(alkynyl) → π*(tpy)] excited states for annulations or 3LMCT [π(alkynyl) → dσ*] excited states for the rest of the processes, which are accessible through thermal population from 3LC(tpy) states. The C-C couplings from the fac complexes are attributed to photoreactive pentacoordinate intermediates.
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Affiliation(s)
- Juan Carlos López-López
- Departamento
de Química Inorgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 19, 30100 Murcia, Spain
| | - Delia Bautista
- Área
Científica y Técnica de Investigación, Universidad de Murcia, Campus de Espinardo, 21, 30100 Murcia, Spain
| | - Pablo González-Herrero
- Departamento
de Química Inorgánica, Facultad de Química, Universidad de Murcia, Campus de Espinardo, 19, 30100 Murcia, Spain
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25
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Dulov DA, Magdesieva TV. N, N'-Diaryldihydrophenazines as Visible-Light Photocatalysts for Anilines' Arylation Using a Dual Photoredox/Ni(II) Cross-Coupling Strategy. J Org Chem 2023; 88:12765-12775. [PMID: 37596978 DOI: 10.1021/acs.joc.3c01445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/21/2023]
Abstract
It has been shown that cheap and easily available N,N'-diaryldihydrophenazines can successfully replace Ir(III)- and Ru(II)-based photocatalysts in the dual photoredox/Ni(II) C-N coupling of aryl halides with a wide range of anilines (32 examples). The efficient, operationally simple approach to diarylamines has been elaborated, which is amenable to scaling up via a flow apparatus.
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Affiliation(s)
- Dmitry A Dulov
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119234, Russia
| | - Tatiana V Magdesieva
- Chemistry Department, Lomonosov Moscow State University, Leninskie Gory 1/3, Moscow 119234, Russia
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26
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Li PS, Teng QQ, Chen M. Photoinduced radical cascade domino Heck coupling of N-aryl acrylamide with vinyl arenes enabled by palladium catalysis. Chem Commun (Camb) 2023; 59:10620-10623. [PMID: 37578259 DOI: 10.1039/d3cc03506a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2023]
Abstract
Here, a redox-neutral palladium-catalyzed photo-induced radical cascade domino Heck reaction of N-aryl acrylamide with vinyl arenes is described. A diverse range of bioactive oxindoles, featuring an all-carbon quaternary center, were synthesized. The reaction is proposed to proceed via an open-shell intermediate and occurs under mild reaction conditions, exhibiting excellent functional group tolerance. Importantly, the synthesized products can be readily transformed into biologically active molecules, including (±)-physostigmine and (±)-physovenine.
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Affiliation(s)
- Pei-Shang Li
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Chang-zhou University, Changzhou, 213164, China.
| | - Qiao-Qiao Teng
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Chang-zhou University, Changzhou, 213164, China.
| | - Ming Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials and Technology, School of Petrochemical Engineering, Chang-zhou University, Changzhou, 213164, China.
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27
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Sarkar S, Ghosh S, Kurandina D, Noffel Y, Gevorgyan V. Enhanced Excited-State Hydricity of Pd-H Allows for Unusual Head-to-Tail Hydroalkenylation of Alkenes. J Am Chem Soc 2023; 145:12224-12232. [PMID: 37224263 PMCID: PMC10750326 DOI: 10.1021/jacs.3c02410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Photoinduced enhancement of hydricity of palladium hydride species enables unprecedented hydride addition-like ("hydridic") hydropalladation of electron-deficient alkenes, which allows for chemoselective head-to-tail cross-hydroalkenylation of electron-deficient and electron-rich alkenes. This mild and general protocol works with a wide range of densely functionalized and complex alkenes. Notably, this approach also allows for highly challenging cross-dimerization of electronically diverse vinyl arenes and heteroarenes.
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Affiliation(s)
- Sumon Sarkar
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Soumen Ghosh
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Daria Kurandina
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Yusuf Noffel
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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28
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Li H, Fu J, Fu J, Li X, Wei D, Chen H, Bai L, Yang L, Yang H, Wang W. Regioselective and Diastereoselective Halofunctionalization of Alkenes Promoted by Organophotocatalytic Solar Catalysis. J Org Chem 2023. [PMID: 37154472 DOI: 10.1021/acs.joc.3c00204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A visible-light metal-free photocatalytic regioselective and enantioselective alkene halofunctionalization reaction under mild conditions is reported. Various terminal and internal alkenes were transformed to their α-halogenated and α,β-dibrominated derivatives in good to excellent yields within reaction time as short as 5 min. Water can be used as the "green" nucleophile and solvent in the halohydroxylation and halo-oxidation reactions. Different types of products can be obtained by adjusting the reaction conditions. In addition, sunlight is proved to produce products with similar yields, representing a practical example of solar synthesis and providing an opportunity for solar energy utilization.
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Affiliation(s)
- Huili Li
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Jianmin Fu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Jundong Fu
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Xueji Li
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Donglei Wei
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Hou Chen
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Liangjiu Bai
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Lixia Yang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Huawei Yang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | - Wenxiang Wang
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
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29
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Anwar K, Troyano FJA, Abazid AH, El Yarroudi O, Funes-Ardoiz I, Gómez-Suárez A. Modular Synthesis of Polar Spirocyclic Scaffolds Enabled by Radical Chemistry. Org Lett 2023; 25:3216-3221. [PMID: 37130365 DOI: 10.1021/acs.orglett.3c00869] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Herein, we report a highly modular strategy to access spirocyclic scaffolds from abundant starting materials, i.e., cyclic ketones and α-amino or oxamic acids. The sequence proceeds through a straightforward Knoevenagel condensation, followed by a domino Giese-type reaction/base-mediated cyclization process, to deliver a broad scope of polar spirocyclic scaffolds in good to excellent yields. The products can be readily diversified, thus increasing the versatility of our method to gain rapid access to libraries of potential druglike molecules.
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Affiliation(s)
- Khadijah Anwar
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | | | - Ayham H Abazid
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Oumayma El Yarroudi
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
| | - Ignacio Funes-Ardoiz
- Centro de Investigación en Síntesis Química (CISQ), Universidad de La Rioja, 26004 Logroño, Spain
| | - Adrián Gómez-Suárez
- Organic Chemistry, Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal, Germany
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30
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de Groot LHM, Ilic A, Schwarz J, Wärnmark K. Iron Photoredox Catalysis-Past, Present, and Future. J Am Chem Soc 2023; 145:9369-9388. [PMID: 37079887 PMCID: PMC10161236 DOI: 10.1021/jacs.3c01000] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/22/2023]
Abstract
Photoredox catalysis of organic reactions driven by iron has attracted substantial attention throughout recent years, due to potential environmental and economic benefits. In this Perspective, three major strategies were identified that have been employed to date to achieve reactivities comparable to the successful noble metal photoredox catalysis: (1) Direct replacement of a noble metal center by iron in archetypal polypyridyl complexes, resulting in a metal-centered photofunctional state. (2) In situ generation of photoactive complexes by substrate coordination where the reactions are driven via intramolecular electron transfer involving charge-transfer states, for example, through visible-light-induced homolysis. (3) Improving the excited-state lifetimes and redox potentials of the charge-transfer states of iron complexes through new ligand design. We seek to give an overview and evaluation of recent developments in this rapidly growing field and, at the same time, provide an outlook on the future of iron-based photoredox catalysis.
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Affiliation(s)
- Lisa H M de Groot
- Centre for Analysis and Synthesis, Lund University, Lund SE-22100, Sweden
| | - Aleksandra Ilic
- Centre for Analysis and Synthesis, Lund University, Lund SE-22100, Sweden
| | - Jesper Schwarz
- Centre for Analysis and Synthesis, Lund University, Lund SE-22100, Sweden
| | - Kenneth Wärnmark
- Centre for Analysis and Synthesis, Lund University, Lund SE-22100, Sweden
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31
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Dong DQ, Tian BL, Yang H, Wei ZH, Yang SH, Zhou MY, Ding CZ, Wang YL, Gao JH, Wang SJ, Yang WC, Liu BT, Wang ZL. Visible light induced palladium-catalyzed reactions involving halogenated hydrocarbon (RX). MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.113073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
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32
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Xu S, Ping Y, Li W, Guo H, Su Y, Li Z, Wang M, Kong W. Enantioselective C(sp 3)-H Functionalization of Oxacycles via Photo-HAT/Nickel Dual Catalysis. J Am Chem Soc 2023; 145:5231-5241. [PMID: 36812098 DOI: 10.1021/jacs.2c12481] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
The selective functionalization of ubiquitous but inert C-H bonds is highly appealing in synthetic chemistry, but the direct transformation of hydrocarbons lacking directing groups into high-value chiral molecules remains a formidable challenge. Herein, we develop an enantioselective C(sp3)-H functionalization of undirected oxacycles via photo-HAT/nickel dual catalysis. This protocol provides a practical platform for the rapid construction of high-value and enantiomerically enriched oxacycles directly from simple and abundant hydrocarbon feedstocks. The synthetic utility of this strategy is further demonstrated in the late-stage functionalization of natural products and the synthesis of many pharmaceutically relevant molecules. Experimental and density functional theory calculation studies provide detailed insights into the mechanism and the origin of enantioselectivity for the asymmetric C(sp3)-H functionalization.
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Affiliation(s)
- Sheng Xu
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
| | - Yuanyuan Ping
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
| | - Wei Li
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
| | - Haoyun Guo
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
| | - Yinyan Su
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
| | - Ziyang Li
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Wangqing Kong
- The Institute for Advanced Studies and Hongyi Honor College, Wuhan University, Wuhan 430072, China
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33
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Chakraborty N, Rajbongshi KK, Dahiya A, Das B, Vaishnani A, Patel BK. NIS-initiated photo-induced oxidative decarboxylative sulfoximidation of cinnamic acids. Chem Commun (Camb) 2023; 59:2779-2782. [PMID: 36786510 DOI: 10.1039/d3cc00142c] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
N-Iodosuccinimide catalyzed, visible-light-induced oxidative decarboxylative cross-coupling between cinnamic acids and NH-sulfoximines is presented. This strategy results in the formation of α-keto-N-acyl sulfoximines via the construction of two new CO bonds and one C-N bond. The in situ-generated N-iodosulfoximine serves as the light-absorbing species in the absence of any external photosensitizer. The keto carbonyl and amidic carbonyl oxygen in the resulting product originate from dioxygen and water respectively.
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Affiliation(s)
- Nikita Chakraborty
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - Kamal K Rajbongshi
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India. .,Department of Chemistry, Handique Girls' College, Guwahati, 781001, Assam, India
| | - Anjali Dahiya
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - Bubul Das
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India.
| | - Akshar Vaishnani
- Department of Chemistry, REVA University, Bangalore, 560064, Bengaluru, India
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati, Assam 781039, India.
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34
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Zhang M, Zhao M, Wang Y, Chen L, Li G, Liu B, You X, Sun W, Hong L. Synthesis and Biological Evaluation of Phthalideisoquinoline Derivatives. J Org Chem 2023; 88:1720-1729. [PMID: 36651751 DOI: 10.1021/acs.joc.2c02702] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A photo and Cu-mediated radical-radical approach enabling the one-step synthesis of the phthalideisoquinoline skeleton has been reported. Under mild reaction conditions, a series of N-aryl phthalideisoquinolines containing various substituents were synthesized in moderate to good yields. Bioactivity data demonstrated that a new compound 4x can efficiently inhibit the growth of multiple tumor cell lines with enhancements of more than 10-fold by significantly increasing G2/M arrest compared with noscapine.
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Affiliation(s)
- Ming Zhang
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou510006, China
| | - Man Zhao
- School of Pharmaceutical Sciences, Shenzhen University Health Science Centre, Shenzhen University, Shenzhen518060, China
| | - Ying Wang
- School of Pharmaceutical Sciences, Shenzhen University Health Science Centre, Shenzhen University, Shenzhen518060, China
| | - Lu Chen
- School of Pharmaceutical Sciences, Shenzhen University Health Science Centre, Shenzhen University, Shenzhen518060, China
| | - Guofeng Li
- School of Pharmaceutical Sciences, Shenzhen University Health Science Centre, Shenzhen University, Shenzhen518060, China
| | - Bohan Liu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou510006, China
| | - Xiaobin You
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou510006, China
| | - Wangsheng Sun
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University, Lanzhou730000, China
| | - Liang Hong
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou510006, China
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35
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Tang S, Zhang HH, Yu S. Enantioselective reductive allylic alkylation enabled by dual photoredox/palladium catalysis. Chem Commun (Camb) 2023; 59:1153-1156. [PMID: 36628922 DOI: 10.1039/d2cc06705f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A dual photoredox/palladium catalyzed regio- and enantioselective reductive cross-coupling of allylic acetates with tertiary/secondary alkyl bromides has been achieved, and Hantzsch ester is used as a homogeneous organic reductant. This straightforward protocol enables the stereoselective construction of C(sp3)-C(sp3) bonds under mild reaction conditions. Mechanistic studies suggest that this reaction involves radical pathways and a chiral Pd complex enables the control of the regio- and enantioselectivities.
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Affiliation(s)
- Sheng Tang
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Centre (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
| | - Hong-Hao Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Centre (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China. .,School of Petrochemical Engineering, Changzhou University, Changzhou 213164, China.
| | - Shouyun Yu
- State Key Laboratory of Analytical Chemistry for Life Science, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Centre (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
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36
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Wang G, Zhang J, Hu L, Wang J, Zhu C. Polydentate hydrazones as multitasking catalysts in visible-light-induced coupling reactions of amines. Org Biomol Chem 2023; 21:754-760. [PMID: 36598776 DOI: 10.1039/d2ob02092k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A Cu/hydrazone catalyst has been applied in the coupling reactions of anilines for the synthesis of diarylamines and azobenzenes. The copper complex that is formed in situ plays a double duty by harnessing photon energy as a photocatalyst and then by catalysing organometallic elementary steps as a transition metal catalyst. By the selection of hydrazones and bases, the reaction selectivity of aniline can be tuned between homo-coupling and its cross-coupling with arylboronic acid, exhibiting the great potential of such hydrazones in organic synthesis.
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Affiliation(s)
- Ganghu Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Jianhua Zhang
- N.O.D topia (Guangzhou) Biotechnology Co. Ltd., Guangzhou, Guangdong 510599, PR China
| | - Legen Hu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Jiaquan Wang
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Chunyin Zhu
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China.
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37
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Wang K, Bao X. Computational Understanding of Dual Gold and Photoredox-Catalyzed Regioselective Thiosulfonylation of Alkenes. J Org Chem 2023; 88:1107-1112. [PMID: 36604340 DOI: 10.1021/acs.joc.2c02565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Herein, a computational work was carried out to gain mechanistic insights into dual gold and photoredox-catalyzed regioselective thiosulfonylation of alkenes with PhSO2SCF3. Computational results suggest that it is more favorable for the complex of Au(I) with PhSO2SCF3 (INT1), instead of an Au(I) catalyst or individual substrates, to quench the excited *[Ru]II photocatalyst in a single-electron oxidative manner to afford [Ru]III. The complexation of the Au(I) catalyst with PhSO2SCF3 could lead to a substantially lowered energy level of the lowest unoccupied molecular orbital, which may be mainly responsible for the feasibility of INT1 in quenching the excited photocatalyst. The resultant single-electron reduced complex, subsequently, is ready to undergo a S-S bond cleavage to form an Au(I)-SCF3 species and a benzenesulfonyl radical. Next, the yielded Au(I)-SCF3 species could undergo single-electron oxidation by [Ru]III to afford an Au(II) intermediate. Subsequently, the binding with an alkyl radical for the formed Au(II) species could occur to further convert to an Au(III) species, from which the final product can be furnished by a reductive elimination step and the Au(I) catalyst is regenerated. Thus, an Au(I)/Au(II)/Au(III)/Au(I) catalytic cycle is suggested to mainly account for the regioselective thiosulfonylation of alkenes.
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Affiliation(s)
- Kaifeng Wang
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China
| | - Xiaoguang Bao
- Innovation Center for Chemical Sciences, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, China.,Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Soochow University, Suzhou, Jiangsu 215123, China
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38
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Xiong N, Li Y, Zeng R. Merging Photoinduced Iron-Catalyzed Decarboxylation with Copper Catalysis for C–N and C–C Couplings. ACS Catal 2023. [DOI: 10.1021/acscatal.2c05293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Ni Xiong
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, P. R. China
| | - Yang Li
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, P. R. China
| | - Rong Zeng
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, P. R. China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, Guangdong, P. R. China
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39
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Site- and enantioselective cross-coupling of saturated N-heterocycles with carboxylic acids by cooperative Ni/photoredox catalysis. Nat Commun 2023; 14:125. [PMID: 36624097 PMCID: PMC9829739 DOI: 10.1038/s41467-023-35800-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Accepted: 01/02/2023] [Indexed: 01/11/2023] Open
Abstract
Site- and enantioselective cross-coupling of saturated N-heterocycles and carboxylic acids-two of the most abundant and versatile functionalities-to form pharmaceutically relevant α-acylated amine derivatives remains a major challenge in organic synthesis. Here, we report a general strategy for the highly site- and enantioselective α-acylation of saturated N-heterocycles with in situ-activated carboxylic acids. This modular approach exploits the hydrogen-atom-transfer reactivity of photocatalytically generated chlorine radicals in combination with asymmetric nickel catalysis to selectively functionalize cyclic α-amino C-H bonds in the presence of benzylic, allylic, acyclic α-amino, and α-oxy methylene groups. The mild and scalable protocol requires no organometallic reagents, displays excellent chemo-, site- and enantioselectivity, and is amenable to late-stage diversification, including a modular synthesis of previously inaccessible Taxol derivatives. Mechanistic studies highlight the exceptional versatility of the chiral nickel catalyst in orchestrating (i) catalytic chlorine elimination, (ii) alkyl radical capture, (iii) cross-coupling, and (iv) asymmetric induction.
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40
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Saha N, Wanjari PJ, Dubey G, Mahawar N, Bharatam PV. Metal-free synthesis of imidazoles and 2-aminoimidazoles. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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41
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Hu Z, Wu J, Wu J, Wu F. Research Progress on Direct Trifluoromethylselenylation. CHINESE J ORG CHEM 2023. [DOI: 10.6023/cjoc202206050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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42
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Shing Cheung KP, Fang J, Mukherjee K, Mihranyan A, Gevorgyan V. Asymmetric intermolecular allylic C-H amination of alkenes with aliphatic amines. Science 2022; 378:1207-1213. [PMID: 36520916 PMCID: PMC10111612 DOI: 10.1126/science.abq1274] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Aliphatic allylic amines are found in a great variety of complex and biorelevant molecules. The direct allylic C-H amination of alkenes serves as the most straightforward method toward these motifs. However, use of widely available internal alkenes with aliphatic amines in this transformation remains a synthetic challenge. In particular, palladium catalysis faces the twin challenges of inefficient coordination of Pd(II) to internal alkenes but excessively tight and therefore inhibitory coordination of Pd(II) by basic aliphatic amines. We report a general solution to these problems. The developed protocol, in contrast to a classical Pd(II/0) scenario, operates through a blue light-induced Pd(0/I/II) manifold with mild aryl bromide oxidant. This open-shell approach also enables enantio- and diastereoselective allylic C-H amination.
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Affiliation(s)
- Kelvin Pak Shing Cheung
- Department of Chemistry and Biochemistry, The University of
Texas at Dallas, Richardson, TX 75080, USA
| | - Jian Fang
- Department of Chemistry and Biochemistry, The University of
Texas at Dallas, Richardson, TX 75080, USA
| | - Kallol Mukherjee
- Department of Chemistry and Biochemistry, The University of
Texas at Dallas, Richardson, TX 75080, USA
| | - Andranik Mihranyan
- Department of Chemistry and Biochemistry, The University of
Texas at Dallas, Richardson, TX 75080, USA
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of
Texas at Dallas, Richardson, TX 75080, USA
- Department of Biochemistry, The University of Texas
Southwestern Medical Center, Dallas, TX 75390, USA
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43
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Ballico M, Alessi D, Jandl C, Lovison D, Baratta W. Terpyridine Diphosphine Ruthenium Complexes as Efficient Photocatalysts for the Transfer Hydrogenation of Carbonyl Compounds. Chemistry 2022; 28:e202201722. [PMID: 36001351 PMCID: PMC9828271 DOI: 10.1002/chem.202201722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Indexed: 01/12/2023]
Abstract
The cationic achiral and chiral terpyridine diphosphine ruthenium complexes [RuCl(PP)(tpy)]Cl (PP=dppp (1), (R,R)-Skewphos (2) and (S,S)-Skewphos (3)) are easily obtained in 85-88 % yield through a one-pot synthesis from [RuCl2 (PPh3 )3 ], the diphosphine and 2,2':6',2''-terpyridine (tpy) in 1-butanol. Treatment of 1-3 with NaPF6 in methanol at RT affords quantitatively the corresponding derivatives [RuCl(PP)(tpy)]PF6 (PP=dppp (1 a), (R,R)-Skewphos (2 a) and (S,S)-Skewphos (3 a)). Reaction of [RuCl2 (PPh3 )3 ] with (S,R)-Josiphos or (R)-BINAP in toluene, followed by treatment with tpy in 1-butanol and finally with NaPF6 in MeOH gives [RuCl(PP)(tpy)]PF6 (PP=(S,R)-Josiphos (4 a), (R)-BINAP (5 a)) isolated in 78 % and 86 % yield, respectively. The chiral derivatives have been isolated as single stereoisomers and 3 a, 4 a have been characterized by single crystal X-ray diffraction studies. The tpy complexes with NaOiPr display high photocatalytic activity in the transfer hydrogenation (TH) of carbonyl compounds using 2-propanol as the only hydrogen donor and visible light at 30 °C, at remarkably high S/C (up to 5000) and TOF values up to 264 h-1 . The chiral enantiomers 2, 2 a and 3, 3 a induce the asymmetric photocatalytic TH of acetophenone, affording (S)- and (R)-1-phenylethanol with 51 and 52 % ee, respectively, in a MeOH/2-propanol mixture.
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Affiliation(s)
- Maurizio Ballico
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
| | - Dario Alessi
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
| | - Christian Jandl
- Department of Chemistry & Catalysis Research CenterTUMLichtenbergstraße 485747Garching b. MünchenGermany
| | - Denise Lovison
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
| | - Walter Baratta
- Dipartimento di Scienze AgroAlimentariAmbientali e Animali (DI4A)Università di UdineVia Cotonificio 10833100UdineItaly
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44
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Sarkar S, Banerjee A, Shah JA, Mukherjee U, Frederiks NC, Johnson CJ, Ngai MY. Excited-State Copper-Catalyzed [4 + 1] Annulation Reaction Enables Modular Synthesis of α,β-Unsaturated-γ-Lactams. J Am Chem Soc 2022; 144:20884-20894. [PMID: 36326178 PMCID: PMC9754811 DOI: 10.1021/jacs.2c09006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Synthesis of α,β-unsaturated-γ-lactams continue to attract attention due to the importance of this structural motif in organic chemistry. Herein, we report the development of a visible-light-induced excited-state copper-catalyzed [4 + 1] annulation reaction for the preparation of a wide range of γ-H, -OH, and -OR-substituted α,β-unsaturated-γ-lactams using acrylamides as the 4-atom unit and aroyl chlorides as the 1-atom unit. This modular synthetic protocol features mild reaction conditions, broad substrate scope, and high functional group tolerance. The reaction is amenable to late-stage diversification of complex molecular architectures, including derivatives of marketed drugs. The products of the reaction can serve as versatile building blocks for further derivatization. Preliminary mechanistic studies suggest an inner-sphere catalytic cycle involving photoexcitation of the Cu(BINAP) catalyst, single-electron transfer, and capture of radical intermediates by copper species, followed by reductive elimination or protonation to give the desired γ-functionalized α,β-unsaturated-γ-lactams.
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Affiliation(s)
- Satavisha Sarkar
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
| | - Arghya Banerjee
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
| | - Jagrut A. Shah
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
| | - Upasana Mukherjee
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
| | - Nicoline C. Frederiks
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
| | - Christopher J. Johnson
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
| | - Ming-Yu Ngai
- Department of Chemistry, State University of New York, Stony Brook, New York, 11794-3400, USA
- Institute of Chemical Biology and Drug Discovery, State University of New York, Stony Brook, New York, 11794-3400 USA
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Abstract
We report the first palladium hydride enabled hydroalkenylation of strained molecules. This new mild protocol proceeds via a regio- and chemoselective hydropalladation step, followed by a photoinduced radical alkyl Heck reaction. This methodology represents a new reactivity mode for strained molecules and opens new avenues for photoinduced palladium catalysis. The reaction is compatible with a wide range of functional groups and can be applied to complex structures, delivering a diverse array of highly valuable and modifiable alkenylated cyclobutanes and cyclopropanes. A hydroalkenylation/diastereoselective rearrangement cascade toward a cyclopentene scaffold has also been demonstrated.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, The University of Texas at Dallas, Richardson, Texas 75080-3021, United States
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46
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Jue Z, Huang Y, Qian J, Hu P. Visible Light-Induced Unactivated δ-C(sp 3 )-H Amination of Alcohols Catalyzed by Iron. CHEMSUSCHEM 2022; 15:e202201241. [PMID: 35916215 DOI: 10.1002/cssc.202201241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Revised: 07/30/2022] [Indexed: 06/15/2023]
Abstract
An iron-catalyzed remote C(sp3 )-H amination of alcohols through 1,5-hydrogen atom transfer is developed. This protocol provides a method to generate δ-C(sp3 )-N bonds from primary, secondary, and tertiary alcohols under mild conditions. A wide substrate scope and a good functional group tolerance are presented. Mechanistic studies show that a LMCT course of an Fe-OR species and a chlorine radical-induced hydrogen abstraction of an alcohol are possible to generate the alkoxy radical intermediate.
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Affiliation(s)
- Zhaofan Jue
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Yahao Huang
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Jiahui Qian
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, P. R. China
| | - Peng Hu
- Lehn Institute of Functional Materials, School of Chemistry, Sun Yat-sen University, Guangzhou, 510006, P. R. China
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47
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Toriumi N, Inoue T, Iwasawa N. Shining Visible Light on Reductive Elimination: Acridine-Pd-Catalyzed Cross-Coupling of Aryl Halides with Carboxylic Acids. J Am Chem Soc 2022; 144:19592-19602. [PMID: 36219695 DOI: 10.1021/jacs.2c09318] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Despite the recent tremendous progress on transition-metal/photoredox dual catalysis in organic synthesis, single transition-metal catalysis under visible-light irradiation, which can utilize light energy more efficiently, is still underdeveloped. Herein, we report the design of photosensitizing phosphinoacridine bidentate ligands for visible-light-induced transition-metal catalysis, expecting that the electron-accepting acridine moiety would create a highly reactive electron-deficient metal center toward reductive elimination via metal-to-ligand charge transfer (MLCT). Using these ligands, we have achieved a palladium-catalyzed cross-coupling reaction of aryl halides with carboxylic acids under visible-light irradiation. Electronic tuning of the phosphinoacridine ligands not only enabled the use of a variety of aryl halides as the coupling partner, including less reactive aryl chlorides, under blue light irradiation, but also realized the employment of lower-energy green and red light for the cross-coupling. Experimental mechanistic studies have proved that the reductive elimination of aryl esters is induced by photoirradiation of phosphinoacridine-ligated arylpalladium(II) carboxylate complexes. The theoretical calculation suggests that the reductive elimination in the excited state is promoted by decreasing the electron density of the Pd center through photoinduced intramolecular electron transfer, i.e., MLCT, in the transition state owing to the electron-deficient acridine scaffold. This is a very rare example of photoinduced reductive elimination on palladium(II) complexes.
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Affiliation(s)
- Naoyuki Toriumi
- Department of Chemistry, Tokyo Institute of Technology, O̅okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Tomonori Inoue
- Department of Chemistry, Tokyo Institute of Technology, O̅okayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Nobuharu Iwasawa
- Department of Chemistry, Tokyo Institute of Technology, O̅okayama, Meguro-ku, Tokyo 152-8551, Japan
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48
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Li S, Zhang J, Xie Z. Visible-Light-Induced Palladium-Catalyzed Cross-Coupling of Iodocarboranes with (Hetero)Arenes. Org Lett 2022; 24:7497-7501. [PMID: 36201284 DOI: 10.1021/acs.orglett.2c02648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This work describes a general method for the efficient production of a class of cage B-centered carboranyl radicals at the B3, B4, and B9 sites via a visible-light-promoted palladium(0)/palladium(I) pathway using readily available iodo-o-carboranes as the starting materials. The electrophilicities of these hypervalent boron-centered radicals decrease in the following order: B3 > B4 > B9. They are useful intermediates for the preparation of a family of cage B-(hetero)arylated o-carboranes at ambient temperature.
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Affiliation(s)
- Shimeng Li
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Jie Zhang
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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49
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Yu J, Cheng Y, Chen B, Tung C, Wu L. Cobaloxime Photocatalysis for the Synthesis of Phosphorylated Heteroaromatics. Angew Chem Int Ed Engl 2022; 61:e202209293. [DOI: 10.1002/anie.202209293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Indexed: 11/11/2022]
Affiliation(s)
- 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
| | - 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
| | - 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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50
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Yu H, Zhang Q, Zi W. Enantioselective Three‐Component Photochemical 1,4‐Bisalkylation of 1,3‐Butadiene with Pd/Cu Catalysis. Angew Chem Int Ed Engl 2022; 61:e202208411. [DOI: 10.1002/anie.202208411] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Indexed: 12/26/2022]
Affiliation(s)
- Huimin Yu
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
| | - Qinglong Zhang
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300071 China
| | - Weiwei Zi
- State Key Laboratory and Institute of Elemento-Organic Chemistry College of Chemistry Nankai University Tianjin 300071 China
- Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300071 China
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