1
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Sudarshan K, Yarlagadda S, Sengupta S. Recent Advances in the Synthesis of Diarylheptanoids. Chem Asian J 2024; 19:e202400380. [PMID: 38744677 DOI: 10.1002/asia.202400380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Revised: 05/13/2024] [Accepted: 05/14/2024] [Indexed: 05/16/2024]
Abstract
In the quest for synthesizing biologically important natural products, medicinal chemists embark on an endless journey. This review focuses on the reports published towards the syntheses of diarylheptanoids, classifying them into linear, tetrahydropyran, diarylether, and biphenyl categories. The synthesis methods for each class from 2013 to 2023 are discussed, providing a comprehensive overview of the advancements in the field. Representative natural product examples are highlighted for each category. The review emphasizes the importance of diarylheptanoids in the realms of chemistry and medicine, showcasing their potential as valuable compounds for medicinal and synthetic chemists.
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Affiliation(s)
- Kasireddy Sudarshan
- Kasireddy Sudarshan, Suresh Yarlagadda, Sagnik Sengupta, Department of Chemistry, Institute for Drug Discovery, Purdue University, West Lafayette, IN-47907, USA
| | - Suresh Yarlagadda
- Kasireddy Sudarshan, Suresh Yarlagadda, Sagnik Sengupta, Department of Chemistry, Institute for Drug Discovery, Purdue University, West Lafayette, IN-47907, USA
| | - Sagnik Sengupta
- Kasireddy Sudarshan, Suresh Yarlagadda, Sagnik Sengupta, Department of Chemistry, Institute for Drug Discovery, Purdue University, West Lafayette, IN-47907, USA
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2
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Lei T, Graf S, Schöll C, Krätzschmar F, Gregori B, Appleson T, Breder A. Asymmetric Photoaerobic Lactonization and Aza-Wacker Cyclization of Alkenes Enabled by Ternary Selenium-Sulfur Multicatalysis. ACS Catal 2023; 13:16240-16248. [PMID: 38125978 PMCID: PMC10729055 DOI: 10.1021/acscatal.3c04443] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Revised: 10/28/2023] [Accepted: 10/30/2023] [Indexed: 12/23/2023]
Abstract
An adaptable, sulfur-accelerated photoaerobic selenium-π-acid ternary catalyst system for the enantioselective allylic redox functionalization of simple, nondirecting alkenes is reported. In contrast to related photoredox catalytic methods, which largely depend on olefinic substrates with heteroatomic directing groups to unfold high degrees of stereoinduction, the current protocol relies on chiral, spirocyclic selenium-π-acids that covalently bind to the alkene moiety. The performance of this ternary catalytic method is demonstrated in the asymmetric, photoaerobic lactonization and cycloamination of enoic acids and unsaturated sulfonamides, respectively, leading to an averaged enantiomeric ratio (er) of 92:8. Notably, this protocol provides for the first time an asymmetric, catalytic entryway to pharmaceutically relevant 3-pyrroline motifs, which was used as a platform to access a 3,4-dihydroxyproline derivative in only seven steps with a 92:8 er.
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Affiliation(s)
| | | | - Christopher Schöll
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Felix Krätzschmar
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Bernhard Gregori
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Theresa Appleson
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
| | - Alexander Breder
- Institut Für Organische
Chemie, Universität Regensburg, Universitätstrasse 31, 93053 Regensburg, Germany
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3
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Li J, Liu T, Singh N, Huang Z, Ding Y, Huang J, Sudarsanam P, Li H. Photocatalytic C-N bond construction toward high-value nitrogenous chemicals. Chem Commun (Camb) 2023; 59:14341-14352. [PMID: 37987689 DOI: 10.1039/d3cc04771g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
The construction of carbon-nitrogen bonds is vital for producing versatile nitrogenous compounds for the chemical and pharmaceutical industries. Among developed synthetic approaches to nitrogenous chemicals, photocatalysis is particularly prominent and has become one of the emerging fields due to its unique advantages of eco-sustainable characteristics, efficient process integration, no need for high-pressure H2, and tunable synthesis methods for developing advanced photocatalytic materials. Here, the review focuses on potential photocatalytic protocols developed for the construction of robust carbon-nitrogen bonds in discrepant activation environments to produce high-value nitrogenous chemicals. The photocatalytic C-N bond construction strategies and involved reaction mechanisms are elucidated.
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Affiliation(s)
- Jie Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China.
| | - Tengyu Liu
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China.
| | - Nittan Singh
- Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, Pune 411 008, India
| | - Zhuochun Huang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China.
| | - Yan Ding
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China.
| | - Jinshu Huang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China.
| | - Putla Sudarsanam
- Department of Chemistry, Indian Institute of Technology Hyderabad, Kandi, Sangareddy 502284, India.
| | - Hu Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, State-Local Joint Laboratory for Comprehensive Utilization of Biomass, Center for R&D of Fine Chemicals, Guizhou University, Guiyang 550025, China.
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4
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Cao H, Histand G, Lin D. Selectfluor-Induced Oxidative Amination of N-Heteroaromatics with Purine. J Org Chem 2023; 88:5687-5695. [PMID: 37120834 DOI: 10.1021/acs.joc.3c00149] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
An oxidative coupling reaction between purines and aromatic N-heterocycles was developed to synthesize a series of N-heteroaryl purine derivatives using Selectfluor as an oxidant at room temperature. This process uses a commercial oxidant, uses no base, metal, or other additives, is simple to carry out, and has a broad range of substrates.
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Affiliation(s)
- Haiyan Cao
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
| | - Gary Histand
- The International School of Advanced Materials, School of Materials Science and Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China
| | - Dongen Lin
- Key Laboratory of Functional Molecular Engineering of Guangdong Province, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510641, China
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5
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Chen B, Huang Z, Hu Z, Liu X, Weng J. Visible Light Induced C2 Alkylation of 2
H
‐Benzoxazoles with Cycloalkanes and Ethers
via
Selectfluor‐Mediated Oxidation. ChemistrySelect 2023. [DOI: 10.1002/slct.202204773] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Affiliation(s)
- Bo Chen
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China
| | - Zhen Huang
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China
| | - Zhi‐Gang Hu
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China
| | - Xing‐Hai Liu
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China
| | - Jian‐Quan Weng
- College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China
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6
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Nguyen K, Nguyen V, Tran H, Pham P. Organo-photocatalytic C-H bond oxidation: an operationally simple and scalable method to prepare ketones with ambient air. RSC Adv 2023; 13:7168-7178. [PMID: 36891491 PMCID: PMC9986805 DOI: 10.1039/d3ra00332a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 02/17/2023] [Indexed: 03/08/2023] Open
Abstract
Oxidative C-H functionalization with O2 is a sustainable strategy to convert feedstock-like chemicals into valuable products. Nevertheless, eco-friendly O2-utilizing chemical processes, which are scalable yet operationally simple, are challenging to develop. Here, we report our efforts, via organo-photocatalysis, in devising such protocols for catalytic C-H bond oxidation of alcohols and alkylbenzenes to ketones using ambient air as the oxidant. The protocols employed tetrabutylammonium anthraquinone-2-sulfonate as the organic photocatalyst which is readily available from a scalable ion exchange of inexpensive salts and is easy to separate from neutral organic products. Cobalt(ii) acetylacetonate was found to be greatly instrumental to oxidation of alcohols and therefore was included as an additive in evaluating the alcohol scope. The protocols employed a nontoxic solvent, could accommodate a variety of functional groups, and were readily scaled to 500 mmol scale in a simple batch setting using round-bottom flasks and ambient air. A preliminary mechanistic study of C-H bond oxidation of alcohols supported the validity of one possible mechanistic pathway, nested in a more complex network of potential pathways, in which the anthraquinone form - the oxidized form - of the photocatalyst activates alcohols and the anthrahydroquinone form - the relevant reduced form of the photocatalyst - activates O2. A detailed mechanism, which reflected such a pathway and was consistent with previously accepted mechanisms, was proposed to account for formation of ketones from aerobic C-H bond oxidation of both alcohols and alkylbenzenes.
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Affiliation(s)
- Ky Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Van Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Hieu Tran
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Phong Pham
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
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7
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Ghosh MK, Sharma KS, Pandey G. Regioselective C(sp 2)-H imidation of arenes by redox neutral visible-light photocatalysis. Org Biomol Chem 2023; 21:538-550. [PMID: 36537241 DOI: 10.1039/d2ob02040h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
We report herein a redox neutral visible light-induced regioselective C(sp2)-H imidation of electron-rich arenes and heteroarenes using conceptually designed redox-active 1 as a source of the N-centered imidyl radical. Structurally diverse aromatic imides were obtained in moderate to good yields. This methodology has been successfully employed for the late stage imidation of complex molecules and has also been applied towards the formal total synthesis of the marine natural products carpatamides A, B and D. It has further been shown that the generated imides can easily be converted to the corresponding anilines in situ directly.
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Affiliation(s)
- Manoj Kumar Ghosh
- Department of Chemistry, Institute of Science, Banaras Hindu University (B. H. U.), Varanasi-221005, U.P., India.
| | - Kumari Swati Sharma
- Department of Chemistry, Institute of Science, Banaras Hindu University (B. H. U.), Varanasi-221005, U.P., India.
| | - Ganesh Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University (B. H. U.), Varanasi-221005, U.P., India.
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8
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Modern Photocatalytic Strategies in Natural Product Synthesis. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 120:1-104. [PMID: 36587307 DOI: 10.1007/978-3-031-11783-1_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Modern photocatalysis has proven its generality for the development and functionalization of native functionalities. To date, the field has found broad applications in diverse research areas, including the total synthesis of natural products. This contribution covers recent reports of total syntheses involving as a key step a photocatalytic reaction. Among the selected examples, the photocatalytic processes proceed in a highly chemo-, regio-, and stereoselective manner, thereby allowing the rapid access to structurally complex architectures under light-driven conditions.
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9
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Zhang L, Luo C, Shi H, Zhu L, Xu YQ, Cao ZY, Wang C. A general nickel-catalyzed highly regioselective hydroarylation of unactivated alkenes enabled by the picolinamide auxiliary. Chem Commun (Camb) 2022; 58:13511-13514. [PMID: 36385370 DOI: 10.1039/d2cc04932e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
A practical method for regioselective hydroarylation of unactivated γ- or δ-vinyl alkylamines has been reported, enabling facile preparation of highly value-added ε- or ζ-aryl alkylamines. The protocol employs nickel catalysis, shows high functional group tolerance and can be used for modifying bio-related molecules.
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Affiliation(s)
- Lanlan Zhang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China.
| | - Chun Luo
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China.
| | - Haoran Shi
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China.
| | - Lin Zhu
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China.
| | - Yuan-Qing Xu
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Zhong-Yan Cao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, China.
| | - Chao Wang
- Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China.
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10
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Selective functionalization of benzylic C(sp3)–H bonds to synthesize complex molecules. Chem 2022. [DOI: 10.1016/j.chempr.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Liu T, Gan KB, Zhong RL, He X, Kwong FY. A Metal-Free and Redox-Neutral Benzylic C-O Cyclization for Succinct Access of Helical Chromenes. Org Lett 2022; 24:6805-6809. [PMID: 36098713 DOI: 10.1021/acs.orglett.2c02728] [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
A redox-neutral benzylic C-O cyclization under beneficial transition-metal-free conditions is reported. Key to the success of this process is the utilization of the Tf anion as the leaving group for achieving the redox-neutral transformation. This protocol delivers a series of captivating helical compounds having various functionality in good-to-excellent yields. It is particularly noteworthy that sterically hindered helical compounds are conformationally stable. In addition to simple helical chromenes, the bihelical multiple-ring systems which are potentially useful in material chemistry are also easily attained by employing this method. DFT calculation revealed that quinone intermediate is the key species, among four possible mechanisms, for accomplishing the desired cyclization via an oxa-6π-electrocyclization pathway.
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Affiliation(s)
- Tianyi Liu
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Hong Kong, China.,Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, P. R. China
| | - Kin Boon Gan
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Hong Kong, China.,Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, P. R. China
| | - Rong-Lin Zhong
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Hong Kong, China.,Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, College of Chemistry, Jilin University, Changchun 130023, P. R. China
| | - Xinwei He
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Hong Kong, China.,Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, P. R. China
| | - Fuk Yee Kwong
- State Key Laboratory of Synthetic Chemistry and Department of Chemistry, The Chinese University of Hong Kong, New Territories, Hong Kong, China.,Shenzhen Municipal Key Laboratory of Chemical Synthesis of Medicinal Organic Molecules, Shenzhen Research Institute, The Chinese University of Hong Kong, No. 10, Second Yuexing Road, Shenzhen 518507, P. R. China
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12
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Abstract
The fields of C-H functionalization and photoredox catalysis have garnered enormous interest and utility in the past several decades. Many different scientific disciplines have relied on C-H functionalization and photoredox strategies including natural product synthesis, drug discovery, radiolabeling, bioconjugation, materials, and fine chemical synthesis. In this Review, we highlight the use of photoredox catalysis in C-H functionalization reactions. We separate the review into inorganic/organometallic photoredox catalysts and organic-based photoredox catalytic systems. Further subdivision by reaction class─either sp2 or sp3 C-H functionalization─lends perspective and tactical strategies for use of these methods in synthetic applications.
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Affiliation(s)
- Natalie Holmberg-Douglas
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
| | - David A Nicewicz
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599-3290, United States
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13
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Michelet V, Marsicano V, Arcadi A. Gold‐Catalyzed Regioselective Oxyfluorination / Oxydifluorination vs. Diketonization of Phthalimido‐Protected Propargylamines with Selectfluor. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Veronique Michelet
- University of Cote d'Azur: Universite de Nice Sophia Antipolis CHEMISTRY Parc Valrose 06100 NICE FRANCE
| | - Vincenzo Marsicano
- Nice University: Universite de Nice Sophia Antipolis Chemistry Parc Valrose FRANCE
| | - Antonio Arcadi
- University of L'Aquila Department of Physical and Chemical Sciences: Universita degli Studi dell'Aquila Dipartimento di Scienze Fisiche e Chimiche Chemistry L'Aquila ITALY
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14
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Mondal PK, Tiwari SK, Singh P, Pandey G. Direct Arylation of Distal and Proximal C(sp 3)-H Bonds of t-Amines with Aryl Diazonium Tetrafluoroborates via Photoredox Catalysis. J Org Chem 2021; 86:17184-17196. [PMID: 34786938 DOI: 10.1021/acs.joc.1c02286] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
A visible light-mediated arylation protocol for t-amines has been reported through the coupling of γ- and α-amino alkyl radicals with different aryl diazonium salts using Ru(bpy)3Cl2·6H2O as a photocatalyst. Structurally different 9-aryl-9,10-dihydroacridine, 1-aryl tetrahydroisoquinoline, hexahydropyrrolo[2,1-a]isoquinoline, and hexahydro-2H-pyrido[2,1-a]isoquinoline frameworks with different substitution patterns have been synthesized in good yield using this methodology.
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Affiliation(s)
- Pradip Kumar Mondal
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
| | - Sandip Kumar Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
| | - Pushpendra Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
| | - Ganesh Pandey
- Department of Chemistry, Institute of Science, Banaras Hindu University (BHU), Varanasi 221005, India
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15
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Lai H, Xu J, Lin J, Zha D. Copper-promoted direct amidation of isoindolinone scaffolds by sodium persulfate. Org Biomol Chem 2021; 19:7621-7626. [PMID: 34308463 DOI: 10.1039/d1ob01054a] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isoindolinones are ubiquitous structural motifs in natural products and pharmaceuticals. Establishing an efficient method for structural modification of isoindolinones could significantly facilitate new drug development. Herein, we describe copper-promoted direct amidation of isoindolinone scaffolds mediated by sodium persulfate. The method exhibits mild reaction conditions and high site-selectivity, and enables the structural modification of the drug indobufen ester with various amides with yields of 49 to 98%. It is also gram-scalable. Additionally, the reaction mechanism appears to involve a radical and a carbocationic pathway.
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Affiliation(s)
- Huifang Lai
- Department of Medicinal Chemistry, School of Pharmacy, Fujian Medical University, Fuzhou 350004, Fujian Province, China.
| | - Jiexin Xu
- Department of Medicinal Chemistry, School of Pharmacy, Fujian Medical University, Fuzhou 350004, Fujian Province, China.
| | - Jin Lin
- Department of Medicinal Chemistry, School of Pharmacy, Fujian Medical University, Fuzhou 350004, Fujian Province, China.
| | - Daijun Zha
- Department of Medicinal Chemistry, School of Pharmacy, Fujian Medical University, Fuzhou 350004, Fujian Province, China. and Fujian Key Laboratory of Drug Target Discovery and Structural and Functional Research, Fujian Medical University, China
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16
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Brandhofer T, Stinglhamer M, Derdau V, Méndez M, Pöverlein C, García Mancheño O. Easy access to drug building-blocks through benzylic C-H functionalization of phenolic ethers by photoredox catalysis. Chem Commun (Camb) 2021; 57:6756-6759. [PMID: 34132710 DOI: 10.1039/d1cc01756j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
A visible light-mediated photocatalyzed C-C-bond forming method for the benzylic C-H functionalization of phenolether containing synthetic building blocks based on a radical-cation/deprotonation strategy is reported. This method allows the mild, selective generation of benzyl radicals in phenolic complex molecules and drug-like compounds, providing new entries in synthetic and medicinal chemistry.
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Affiliation(s)
- Tobias Brandhofer
- Organic Chemistry Institute, Westfälische-Wilhelms University Münster, Correnstraße 36, Münster 48149, UK.
| | - Martin Stinglhamer
- Organic Chemistry Institute, Westfälische-Wilhelms University Münster, Correnstraße 36, Münster 48149, UK.
| | - Volker Derdau
- Sanofi-Aventis Deutschland GmbH, R&D Integrated Drug Discovery, Industriepark Höchst, Frankfurt am Main D-65926, UK
| | - María Méndez
- Sanofi-Aventis Deutschland GmbH, R&D Integrated Drug Discovery, Industriepark Höchst, Frankfurt am Main D-65926, UK
| | - Christoph Pöverlein
- Sanofi-Aventis Deutschland GmbH, R&D Integrated Drug Discovery, Industriepark Höchst, Frankfurt am Main D-65926, UK
| | - Olga García Mancheño
- Organic Chemistry Institute, Westfälische-Wilhelms University Münster, Correnstraße 36, Münster 48149, UK.
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17
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Pitre SP, Overman LE. Strategic Use of Visible-Light Photoredox Catalysis in Natural Product Synthesis. Chem Rev 2021; 122:1717-1751. [PMID: 34232019 DOI: 10.1021/acs.chemrev.1c00247] [Citation(s) in RCA: 105] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Recent progress in the development of photocatalytic reactions promoted by visible light is leading to a renaissance in the use of photochemistry in the construction of structurally elaborate organic molecules. Because of the rich functionality found in natural products, studies in natural product total synthesis provide useful insights into functional group compatibility of these new photocatalytic methods as well as their impact on synthetic strategy. In this review, we examine total syntheses published through the end of 2020 that employ a visible-light photoredox catalytic step. To assist someone interested in employing the photocatalytic steps discussed, the review is organized largely by the nature of the bond formed in the photocatalytic step.
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Affiliation(s)
- Spencer P Pitre
- Department of Chemistry, Oklahoma State University, Stillwater, Oklahoma 74078, United States
| | - Larry E Overman
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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18
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Maeda B, Sakakibara Y, Murakami K, Itami K. Photoredox-Catalyzed Benzylic Esterification via Radical-Polar Crossover. Org Lett 2021; 23:5113-5117. [PMID: 34132549 DOI: 10.1021/acs.orglett.1c01645] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Photoredox-catalyzed C-O bond formation reactions are reported. The decarboxylative esterification reaction allows the conversion of a variety of arylacetic acids into the corresponding benzyl carboxylates. Furthermore, the use of (diacetoxyiodo)benzene allows the conversion of the benzylic C-H bond through hydrogen atom transfer. The reactions were applied to the divergent transformation of pharmaceuticals via decarboxylative or C-H esterification reactions.
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Affiliation(s)
- Bumpei Maeda
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- Department of Chemistry, School of Science, Kwansei Gakuin University, 2-1 Gakuin, Sanda, Hyogo 669-1337, Japan
| | - Yota Sakakibara
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
| | - Kei Murakami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
- Department of Chemistry, School of Science, Kwansei Gakuin University, 2-1 Gakuin, Sanda, Hyogo 669-1337, Japan
- Japanese Science and Technology Agency (JST)-PRESTO, 7 Gobancho, Chiyoda, Tokyo 102-0076 Japan
| | - Kenichiro Itami
- Institute of Transformative Bio-Molecules (WPI-ITbM) and Graduate School of Science, Nagoya University, Chikusa, Nagoya 464-8602, Japan
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19
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Oliva M, Coppola GA, Van der Eycken EV, Sharma UK. Photochemical and Electrochemical Strategies towards Benzylic C−H Functionalization: A Recent Update. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001581] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Monica Oliva
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Guglielmo A. Coppola
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
| | - Erik V. Van der Eycken
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
- Peoples' Friendship University of Russia (RUDN University) 6 Miklukho-Maklaya street RU-117198 Moscow Russia
| | - Upendra K. Sharma
- Laboratory for Organic & Microwave-Assisted Chemistry (LOMAC) Department of Chemistry University of Leuven (KU Leuven) Celestijnenlaan 200F B-3001 Leuven Belgium
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20
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Yu H, Lee R, Kim H, Lee D. Diastereoselective Construction of trans-2-Alkyl-6-aryl-3,6-dihydro-2 H-pyrans via Dehydrogenative Cycloetherification Promoted by DDQ. Org Lett 2021; 23:1135-1140. [PMID: 33492976 DOI: 10.1021/acs.orglett.1c00154] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A diastereoselective synthesis of trans-2-alkyl-6-aryl-3,6-dihydro-2H-pyrans has been described. Dehydrogenative cycloetherification of (E)-(±)-1-aryl-5-hydroxy-1-alkenes promoted by DDQ proceeded cleanly via 6-endo cyclization to afford trans-2-alkyl-6-aryl-3,6-dihydro-2H-pyrans (32 examples) in good yield (up to 89%) and with moderate to excellent diastereoselectivity (up to 99:1). The synthetic utility of the method was illustrated by the second total synthesis of (±)-(2R,6S)-3,4-dehydro-1,7-bis(4-hydroxy phenyl)-4'-de-O-methyl centrolobine and a total synthesis of (±)-centrolobine.
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Affiliation(s)
- Heesun Yu
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| | - Ryangha Lee
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| | - Hyoungsu Kim
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
| | - Dongjoo Lee
- College of Pharmacy and Research Institute of Pharmaceutical Science and Technology (RIPST), Ajou University, Suwon 16499, Republic of Korea
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21
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Barday M, Blieck R, Ruyet L, Besset T. Remote trifluoromethylthiolation of alcohols under visible light. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131153] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Aguilar Troyano FJ, Merkens K, Gómez‐Suárez A. Selectfluor® Radical Dication (TEDA
2+.
) – A Versatile Species in Modern Synthetic Organic Chemistry. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000196] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Kay Merkens
- Organic ChemistryBergische Universität Wuppertal Gaußstr. 20 42119 Wuppertal Germany
| | - Adrián Gómez‐Suárez
- Organic ChemistryBergische Universität Wuppertal Gaußstr. 20 42119 Wuppertal Germany
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23
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Jain A, Ameta C. Novel Way to Harness Solar Energy: Photo-Redox Catalysis in Organic Synthesis. KINETICS AND CATALYSIS 2020. [DOI: 10.1134/s002315842002007x] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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24
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Padma R, Srinivas B, Yadav JS, Mohapatra DK. General Asymmetric Synthetic Strategy for the α-Alkylated 2,5,6-Trisubstituted Pyran of Indanomycin and Related Natural Products. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000156] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ravishetty Padma
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Beduru Srinivas
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
| | - Jhillu S. Yadav
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
- School of Science; Indrashil University; Kadi Gujarat India
| | - Debendra K. Mohapatra
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500 007 Hyderabad India
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25
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Yang K, Song M, Ali AIM, Mudassir SM, Ge H. Recent Advances in the Application of Selectfluor as a "Fluorine-free" Functional Reagent in Organic Synthesis. Chem Asian J 2020; 15:729-741. [PMID: 32068956 DOI: 10.1002/asia.202000011] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2020] [Revised: 02/16/2020] [Indexed: 11/09/2022]
Abstract
Selectfluor, [1-chloromethyl-4-fluoro-1,4-diazoniabicyclo-[2.2.2]octane bis(tetrafluoroborate)], is not only an important electrophilic fluorinating agent but also a facile and efficient "fluorine-free" functional reagent in other organic reactions. In this Minireview, we will present a brief history of Selectfluor as a transition metal oxidant, fluorine cation and radical initiator in "fluorine-free" functionalizations over the last five years.
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Affiliation(s)
- Ke Yang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China.,Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, 46202, USA
| | - Mengjie Song
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology School of Petrochemical Engineering, Changzhou University, Changzhou, Jiangsu, 213164, China
| | - Ahmed I M Ali
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, 79409, USA
| | - Syed M Mudassir
- Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, 46202, USA
| | - Haibo Ge
- Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, Indiana, 46202, USA.,Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas, 79409, USA
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26
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Tang L, Yang Z, Yang F, Huang Y, Chen H, Cheng H, Song W, Ren B, Zhou Q. Catalyst‐Free α‐Aminoxylation of 1,3‐Dicarbonyl Compounds with TEMPO Using Selectfluor as an Oxidant. ChemistrySelect 2019. [DOI: 10.1002/slct.201903856] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Lin Tang
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Zhen Yang
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Fang Yang
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Yifan Huang
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Hanfei Chen
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Hao Cheng
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Weiyan Song
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Bo Ren
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
| | - Qiuju Zhou
- College of Chemistry and Chemical EngineeringXinyang Normal University Xinyang 464000 P. R. China
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27
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Xu W, Wang W, Liu T, Xie J, Zhu C. Late-stage trifluoromethylthiolation of benzylic C-H bonds. Nat Commun 2019; 10:4867. [PMID: 31653853 PMCID: PMC6814834 DOI: 10.1038/s41467-019-12844-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/04/2019] [Indexed: 11/09/2022] Open
Abstract
The benzylic positions in drugs are sites that readily react with cytochrome P450 oxidases via single-electron oxidation. New synthetic methodologies to incorporate a fluoroalkyl group at the benzylic site are continually being developed, and in this paper, we report a metal-free and site-selective organophotoredox-catalyzed trifluoromethylthiolation of benzylic C-H bonds for a wide variety of alkyl arenes and heteroarenes. The precise and predictive regioselectivity among various C(sp3)-H bonds originates from an inner-sphere benzylic radical initiation mechanism, and avoids the use of external oxidants or hydrogen atom abstractors. Its practicality stems from the trifluoromethylthiolation of a series of drugs and complex organic molecules, which is overwhelmingly selective for benzyl groups. This operationally simple protocol can provide a general and practical access to structurally diverse benzylic trifluoromethyl sulfides produced from ubiquitous benzylic C-H bonds. Large scale trifluoromethylthiolation can be achieved with continuous flow photoredox technology. Fluoroalkylation of C-H bonds is a class of reaction highly sought after in medicinal chemistry. Here, the authors report a regioselective organophotoredox-catalyzed, trifluoromethylthiolation of benzylic C-H bonds for a wide variety of alkyl (hetero)arenes, and demonstrate its utility in continuous flow.
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Affiliation(s)
- Wentao Xu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Wenliang Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Tao Liu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China.
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China. .,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 200032, Shanghai, China.
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28
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Li YH, Akula PS, Hong BC, Peng CH, Lee GH. Direct Transformation of Nitroalkanes to Nitriles Enabled by Visible-Light Photoredox Catalysis and a Domino Reaction Process. Org Lett 2019; 21:7750-7754. [PMID: 31513414 DOI: 10.1021/acs.orglett.9b02682] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A mild and convenient process for direct transformation of nitroalkanes to the corresponding nitriles was developed using a visible-light photoredox catalysis strategy with household decorative blue LEDs and the additives of Et3N and DIPIBA (or DIPEA). Application of the process in secondary nitroalkanes bearing a β-alcohol resulted in a domino process of the retro-Henry reaction and the subsequent acetalization, aldol, cyanohydrin, and ring-contraction reactions with stereoselectivities. The photocatalytic reaction was demonstrated by a continuous flow method.
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Affiliation(s)
- Yu-Hsun Li
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Pavan Sudheer Akula
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Bor-Cherng Hong
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Chieh-Hung Peng
- Department of Chemistry and Biochemistry , National Chung Cheng University , Chia-Yi 621 , Taiwan, R.O.C
| | - Gene-Hsiang Lee
- Instrumentation Center , National Taiwan University , Taipei , 106 , Taiwan, R.O.C
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