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Liu R, Cheng SC, Xiao Y, Chan KC, Tong KM, Ko CC. Recyclable Polymer-Supported Iridium-Based Photocatalysts for Photoredox Organic Transformations. J Catal 2022. [DOI: 10.1016/j.jcat.2022.01.024] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Lu B, Xiao WJ, Chen JR. Recent Advances in Visible-Light-Mediated Amide Synthesis. Molecules 2022; 27:517. [PMID: 35056829 PMCID: PMC8781888 DOI: 10.3390/molecules27020517] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 01/11/2022] [Accepted: 01/12/2022] [Indexed: 12/10/2022] Open
Abstract
Visible-light photoredox catalysis has attracted tremendous interest within the synthetic community. As such, the activation mode potentially provides a more sustainable and efficient platform for the activation of organic molecules, enabling the invention of many controlled radical-involved reactions under mild conditions. In this context, amide synthesis via the strategy of photoredox catalysis has received growing interest due to the ubiquitous presence of this structural motif in numerous natural products, pharmaceuticals and functionalized materials. Employing this strategy, a wide variety of amides can be prepared effectively from halides, arenes and even alkanes under irradiation of visible light. These methods provide a robust alternative to well-established strategies for amide synthesis that involve condensation between a carboxylic acid and amine mediated by a stoichiometric activating agent. In this review, the representative progresses made on the synthesis of amides through visible light-mediated radical reactions are summarized.
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Affiliation(s)
- Bin Lu
- Key Laboratory of Pesticides and Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China; (B.L.); (W.-J.X.)
| | - Wen-Jing Xiao
- Key Laboratory of Pesticides and Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China; (B.L.); (W.-J.X.)
| | - Jia-Rong Chen
- Key Laboratory of Pesticides and Chemical Biology of the Ministry of Education, College of Chemistry, Central China Normal University, 152 Luoyu Road, Wuhan 430079, China; (B.L.); (W.-J.X.)
- School of Chemistry and Chemical Engineering, Henan Normal University, 46 East of Construction Road, Xinxiang 453007, China
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Xiao Y, Cheng SC, Feng Y, Shi Z, Huang Z, Tsui G, Arava CM, Roy VAL, Ko CC. Photoredox Catalysis for the Fabrication of Water-Repellent Surfaces with Application for Oil/Water Separation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:11592-11602. [PMID: 34558895 DOI: 10.1021/acs.langmuir.1c01926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Silanization processes with perfluoroalkyl silanes have been demonstrated to be effective in developing advanced materials with many functional properties, including hydrophobicity, water repellency, and self-cleaning properties. However, practical industrial applications of perfluoroalkyl silanes are limited by their extremely high cost. On the basis of our recent work on photoredox catalysis for amidation with perfluoroalkyl iodides, its application for surface chemical modification on filter paper, as an illustrative example, has been developed and evaluated. Before photocatalytic amidation, the surface is functionalized with amine functional groups by silanization with 3-(trimethoxysilyl)propylamine. All chemically modified surfaces have been fully characterized by attenuated total reflection infrared (ATR-IR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy with energy-dispersive spectroscopy (SEM-EDS), and three-dimensional (3D) profiling to confirm the successful silanization and photocatalytic amidation. After surface modification of the filter papers with perfluoroalkanamide, they show high water repellency and hydrophobicity with contact angles over 120°. These filter papers possess high wetting selectivity, which can be used to effectively separate the organic and aqueous biphasic mixtures. The perfluoroalkanamide-modified filter papers can be used for separating organic/aqueous biphasic mixtures over many cycles without lowering the separating efficiency, indicating their reusability and excellent durability.
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Affiliation(s)
- Yelan Xiao
- Department of Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, China
- School of Science and Engineering, The Chinese University of Hong Kong (Shenzhen), Shenzhen 518172, China
| | - Shun-Cheung Cheng
- Department of Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, China
| | - Yongyi Feng
- Department of Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, China
| | - Zhen Shi
- Institute of Advanced Magnetic Materials, College of Materials and Environmental Engineering, Hangzhou Dianzi University, Hangzhou 310012, China
| | - Zhenjia Huang
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China
| | - Gary Tsui
- Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong 999077, China
| | - Clement Manohar Arava
- Department of Materials Science & Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong 999077, China
| | - Vellaisamy A L Roy
- James Watt School of Engineering, University of Glasgow, Glasgow G128QQ, United Kingdom
| | - Chi-Chiu Ko
- Department of Chemistry and State Key Laboratory in Marine Pollution, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong 999077, China
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Choi J, Ahn M, Lee JH, Ahn DS, Ki H, Oh I, Ahn CW, Choi EH, Lee Y, Lee S, Kim J, Cho DW, Wee KR, Ihee H. Ultrafast excited state relaxation dynamics in a heteroleptic Ir( iii) complex, fac-Ir(ppy) 2(ppz), revealed by femtosecond X-ray transient absorption spectroscopy. Inorg Chem Front 2021. [DOI: 10.1039/d0qi01510e] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The experimental and calculation results demonstrate that the 3MLppzCT state generated by the spin-forbidden transition rapidly relaxes to 3MLppyCT through internal conversion process with a time constant of ∼450 fs.
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Xiao Y, Chun YK, Cheng SC, Ng CO, Tse MK, Lei NY, Liu R, Ko CC. Photocatalytic amidation and esterification with perfluoroalkyl iodide. Catal Sci Technol 2021. [DOI: 10.1039/d0cy01419b] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Effect of excited-state properties and mechanistic study on visible-light induced photocatalytic amidation and esterification with perfluoroalkyl halides under mild conditions.
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Affiliation(s)
- Yelan Xiao
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Yuen-Kiu Chun
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Shun-Cheung Cheng
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Chi-On Ng
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Man-Kit Tse
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Ngai-Yu Lei
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Ruoyang Liu
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
| | - Chi-Chiu Ko
- Department of Chemistry
- City University of Hong Kong
- Kowloon Tong
- China
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Xiao Y, Chun YK, Cheng SC, Liu R, Tse MK, Ko CC. Visible light photocatalytic cross-coupling and addition reactions of arylalkynes with perfluoroalkyl iodides. Org Biomol Chem 2020; 18:8686-8693. [PMID: 33078803 DOI: 10.1039/d0ob01767a] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Visible light photocatalytic cross-coupling and addition reactions of arylalkynes with perfluoroalkyl iodides have been developed. Through slight modifications of the reaction conditions, reactions that are selective for the preparation of the C-C coupling product (perfluoroalkyl alkynes) and the addition products (iodo-perfluoroalkyl substituted alkenes) can be achieved. These reactions work well with different types of alkynes and perfluoroalkyl iodides. As the iodide generated from the reaction can serve as a reductant to regenerate the photocatalyst from its oxidized form, no sacrificial electron donor is required.
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Affiliation(s)
- Yelan Xiao
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
| | - Yuen-Kiu Chun
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
| | - Shun-Cheung Cheng
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
| | - Ruoyang Liu
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
| | - Man-Kit Tse
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
| | - Chi-Chiu Ko
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Hong Kong, China.
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Zheng Z, van der Werf A, Deliaval M, Selander N. Synthesis of Fluorinated Amide Derivatives via a Radical N-Perfluoroalkylation-Defluorination Pathway. Org Lett 2020; 22:2791-2796. [PMID: 32208612 PMCID: PMC7311088 DOI: 10.1021/acs.orglett.0c00768] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
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A one-pot approach
to fluorinated hydroxamic acid, amide, and thioamide
derivatives is reported. The reaction proceeds via an N-perfluoroalkylation
of nitrosoarenes with perfluoroalkanesulfinates, resulting in labile
N-perfluoroalkylated hydroxylamines. By the addition of suitable additives,
a controllable oxy/thiodefluorination of the fluorinated hydroxylamine
intermediates was achieved. The method highlights N-perfluoroalkylated
amines as versatile intermediates for further synthesis.
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Affiliation(s)
- Zhiyao Zheng
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Angela van der Werf
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Marie Deliaval
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Nicklas Selander
- Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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