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Li R, Yin S, Xie L, Li X, Jia J, Zhao L, He CY. Catalyst-free decarboxylative cross-coupling of N-hydroxyphthalimide esters with tert-butyl 2-(trifluoromethyl)acrylate and its application. Org Biomol Chem 2024; 22:2279-2283. [PMID: 38407278 DOI: 10.1039/d3ob02103c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/27/2024]
Abstract
Here, we demonstrate a practical method toward the facile synthesis of CF3-containing amino acids through visible light promoted decarboxylative cross-coupling of a redox-active ester with tert-butyl 2-(trifluoromethyl)acrylate. The reaction was driven by the photochemical activity of electron donor-acceptor (EDA) complexes that were formed by the non-covalent interaction between a Hantzsch ester and a redox-active ester. The advantages of this protocol are its synthetic simplicity, rich functional group tolerance, and a cost-effective reaction system.
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Affiliation(s)
- Rui Li
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Susu Yin
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Lang Xie
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Xuefei Li
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Jia Jia
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Liang Zhao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
| | - Chun-Yang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China.
- Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou, P.R. China
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2
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Yamamoto Y, Tadano R, Yasui T. Enantioselective Desymmetrization of Trifluoromethylated Tertiary Benzhydrols via Hydrogen-Acceptor-Free Ir-Catalyzed Dehydrogenative C-H Silylation: Decisive Role of the Trifluoromethyl Group. JACS AU 2024; 4:807-815. [PMID: 38425931 PMCID: PMC10900501 DOI: 10.1021/jacsau.3c00794] [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: 12/14/2023] [Revised: 01/29/2024] [Accepted: 01/30/2024] [Indexed: 03/02/2024]
Abstract
Although the trifluoromethyl (CF3) group is one of the most important fluorinated groups owing to its significant ability to modulate pharmacological properties, constructing trifluoromethylated stereogenic centers in an enantioselective manner has been a formidable challenge. Herein, we report the development of the enantioselective desymmetrization of trifluoromethylated benzhydrols via intramolecular dehydrogenative silylation using Ir catalysts with chiral pyridine-oxazoline (PyOX) ligands. The produced benzoxasilol was transformed into several unsymmetrical benzhydrols via iododesilylation and subsequent transition-metal-catalyzed cross-coupling reactions. Moreover, the same Ir catalyst system was used for the kinetic resolution of unsymmetrical trifluoromethylated benzhydrols.
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Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal
Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Ryu Tadano
- Department of Basic Medicinal
Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Takeshi Yasui
- Department of Basic Medicinal
Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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3
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Gallego-Gamo A, Pleixats R, Gimbert-Suriñach C, Vallribera A, Granados A. Hydroxytrifluoroethylation and Trifluoroacetylation Reactions via SET Processes. Chemistry 2024:e202303854. [PMID: 38183331 DOI: 10.1002/chem.202303854] [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: 11/20/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/08/2024]
Abstract
Hydroxytrifluoroethyl and trifluoroacetyl groups are of utmost importance in biologically active compounds, but methods to tether these motifs to organic architectures have been limited. Typically, the preparation of these compounds relied on the use of strong bases or multistep routes. The renaissance of radical chemistry in photocatalytic, transition metal mediated, and hydrogen atom transfer (HAT) processes have allowed the installation of these medicinally relevant fluorinated motifs. This review provides an overview of the methods available for the direct synthesis of hydroxytrifluoroethyl- and trifluoroacetyl-derived compounds governed by single-electron transfer processes.
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Affiliation(s)
- Albert Gallego-Gamo
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Roser Pleixats
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Carolina Gimbert-Suriñach
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Adelina Vallribera
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Albert Granados
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
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4
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Koike T. Fluoroalkyl Sulfoximines for Versatile Photocatalytic Radical Fluoroalkylations. CHEM REC 2023; 23:e202300032. [PMID: 36942940 DOI: 10.1002/tcr.202300032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Revised: 03/01/2023] [Indexed: 03/23/2023]
Abstract
Fluoroalkyl sulfoximines, which serve as electron-accepting fluoroalkyl radical sources, are easy-to-handle, solid, and bench-stable chemicals. Fluoroalkyl radicals can be generated from sulfoximine reagents using strong one-electron injectors, such as a highly reducing photoredox catalyst in the excited state. Our group has developed photocatalytic radical di- and mono-fluoromethylation and α-monofluoroalkylation of olefins with the corresponding fluoroalkyl sulfoximines. In this personal account, appropriate combinations of fluoroalkyl sulfoximines and photoredox catalysts, leading to successful radical fluoroalkylation, have been discussed.
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Affiliation(s)
- Takashi Koike
- Department of Applied Chemistry, Faculty of Fundamental Engineering Nippon Institute of Technology E24-315, 4-1 Gakuendai, Miyashiro-Machi, Minamisaitama-gun, Saitama, 345-8501, Japan
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5
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Hyeon Ka C, Kim S, Jin Cho E. Visible Light-Induced Metal-Free Fluoroalkylations. CHEM REC 2023; 23:e202300036. [PMID: 36942971 DOI: 10.1002/tcr.202300036] [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: 01/30/2023] [Revised: 03/02/2023] [Indexed: 03/23/2023]
Abstract
Fluoroalkylation is a crucial synthetic process that enables the modification of molecules with fluoroalkyl groups, which can enhance the properties of compounds and have potential applications in medicine and materials science. The utilization of visible light-induced, metal-free methods is of particular importance as it provides an environmentally friendly alternative to traditional methods and eliminates the potential risks associated with metal-catalyst toxicity. This Account describes our studies on visible light-induced, metal-free fluoroalkylation processes, which include the use of organic photocatalysts or EDA complexes. We have utilized organophotocatalysts such as Nile red, tri(9-anthryl)borane, and an indole-based tetracyclic complex, as well as catalyst-free EDA chemistry through photoactive halogen bond formation or an unconventional transient ternary complex formation with nucleophilic fluoroalkyl source. A variety of π-systems including arenes/heteroarenes, alkenes, and alkynes have been successfully fluoroalkylated under the developed reaction conditions.
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Affiliation(s)
- Cheol Hyeon Ka
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Seoyeon Kim
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul, 06974, Republic of Korea
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6
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Amii H. Copper-Catalyzed Aromatic Trifluoromethylation and the Related Transformations. CHEM REC 2023; 23:e202300154. [PMID: 37489548 DOI: 10.1002/tcr.202300154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/29/2023] [Indexed: 07/26/2023]
Abstract
Trifluoromethylated aromatic compounds (Ar-CF3 ) are the substances of considerable interest in various industrial fields. The high lipophilicity, strong electron-withdrawing ability, and characteristic size of trifluoromethyl group are key influences in biologically active molecules. Due to these attractive properties, the benzotrifluoride structural motifs have been widely employed in the design of pharmaceuticals, agrochemicals, dyes, liquid crystals, and polymers. Therefore, the development of highly efficient methodologies for aromatic trifluoromethylation is of significant importance for wide fields of science and technology. Recently, a great deal of attention has been paid to catalytic protocols to introduce fluoroalkyl groups into aromatic rings selectively. This personal account highlights the copper-mediated aromatic trifluoromethylation and the related transformations developed by our research group.
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Affiliation(s)
- Hideki Amii
- Division of Molecular Science, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
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7
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Kuninobu Y. Regioselective C-H Trifluoromethylation and Its Related Reactions of (Hetero)aromatic Compounds. CHEM REC 2023; 23:e202300003. [PMID: 36899485 DOI: 10.1002/tcr.202300003] [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: 01/04/2023] [Revised: 02/04/2023] [Indexed: 03/12/2023]
Abstract
Fluorinated functional groups, including trifluoromethyl group, play important roles in the development of drugs, agrochemicals, and organic functional materials. Therefore, the development of highly effective and practical reactions to introduce fluorinated functional groups into (hetero)aromatic compounds is highly desirable. We have achieved several regioselective C-H trifluoromethylation and related reactions by electrophilic and nucleophilic activation of six-membered heteroaromatic compounds and steric protection of aromatic compounds. These reactions proceed in good to excellent yields, even on a gram scale, with high functional group tolerance, and are applicable to the regioselective trifluoromethylation of drug molecules. In this personal account, the background of the introduction reactions of fluorinated functional groups, our reaction designs to achieve regioselective C-H trifluoromethylation and the related reactions of (hetero)aromatic compounds are explained.
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Affiliation(s)
- Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering, Interdisciplinary Engineering Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
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8
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Feng Z, Riemann L, Guo Z, Herrero D, Simon M, Golz C, Mata RA, Alcarazo M. Pentafluorocyclopropanation of (Hetero)arenes Using Sulfonium Salts: Applications in Late-Stage Functionalization. Angew Chem Int Ed Engl 2023; 62:e202306764. [PMID: 37402213 DOI: 10.1002/anie.202306764] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/03/2023] [Accepted: 07/03/2023] [Indexed: 07/06/2023]
Abstract
The evaluation of the pentafluorocyclopropyl group as a chemotype in crop protection and medicinal chemistry has been hampered in the past by the lack of suitable methodologies that enable the practical incorporation of this moiety into advanced synthetic intermediates. Herein, we report the gram-scale synthesis of an unprecedented sulfonium salt, 5-(pentafluorocyclopropyl)dibenzothiophenium triflate, and its use as a versatile reagent for the photoinduced C-H pentafluorocyclopropylation of a broad series of non-previously functionalized (hetero)arenes through a radical mediated mechanism. The scope and potential benefits of the protocol developed are further demonstrated by the late-stage introduction of the pentafluorocyclopropyl unit into biologically relevant molecules and widely used pharmaceuticals.
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Affiliation(s)
- Zeyu Feng
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Lucas Riemann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Zichen Guo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - David Herrero
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Ricardo A Mata
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstr 6, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
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9
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Yedase GS, Arif M, Kuniyil R, Yatham VR. Photocatalytic Hydro Tri/Difluoromethylation of Alkenes with Bench Stable Tri/Difluoromethylating Reagents. Org Lett 2023; 25:6200-6205. [PMID: 37578816 DOI: 10.1021/acs.orglett.3c02413] [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
Herein, we demonstrate the synthesis and characterization of bench stable tri/difluoromethylating reagents and their potential applications in redox neutral hydro tri/difluoromethylation of alkenes enabled by visible light. The new tri/difluoromethylating reagents are obtained on a gram-scale through simply cyclocondensation of commercially available anthranilamide with phenyltrifluoro or difluoromethyl ketone. Preliminary mechanistic studies indicated that a canonical photoredox catalytic cycle is being operative. DFT studies support this and further reveal that deprotonation occurs before radical cleavage. DFT studies also show that the better yield with HCF2 reagent is attributed to the favorable expulsion of the corresponding radical moiety.
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Affiliation(s)
- Girish Suresh Yedase
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India
| | - Munaifa Arif
- Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad 678557, India
| | - Rositha Kuniyil
- Department of Chemistry, Indian Institute of Technology Palakkad, Palakkad 678557, India
| | - Veera Reddy Yatham
- School of Chemistry, Indian Institute of Science Education and Research, Thiruvananthapuram 695551, India
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10
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Chen K, Liu Q, Wan J, Zhu C, Feng C. Ni-Catalyzed Reductive Dibenzylation of Trifluoromethylalkenes for CF 3-Containing All-Carbon Quaternary Center Construction. Org Lett 2023; 25:5995-6000. [PMID: 37553069 DOI: 10.1021/acs.orglett.3c02102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
A Ni-catalyzed reductive dicarbofunctionalization of α-CF3 styrenes with benzyl bromides has been accomplished. This transformation obviates the commonly facile β-F elimination effectively and enables the creation of CF3-substituted all-carbon quaternary centers of pharmaceutical interests. Preliminary mechanistic studies suggest a pathway consisting of benzyl radical addition and subsequent nickel-mediated benzylation of the resulting α-CF3-embedded tertiary C radical.
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Affiliation(s)
- Kai Chen
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Qian Liu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jinyan Wan
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chuan Zhu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, State Key Laboratory of Material-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
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11
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Seong CM, Roberts CC. Redox-Neutral Decarboxylative and Desulfonylative C(sp 3) Trifluoromethylation: Method Development and Mechanistic Inquiry. J Org Chem 2023. [PMID: 37467365 DOI: 10.1021/acs.joc.3c00872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2023]
Abstract
Sodium triflinate (CF3SO2Na) is an inexpensive bench-stable radical CF3 source that is often activated by external oxidants such as peroxides. However, despite the commercial accessibility of CF3SO2Na, the salt has never been applied to decarboxylative trifluoromethylation due to challenges in controlled cross-radical coupling. We report a redox-neutral approach to decarboxylative C(sp3) trifluoromethylation of carboxylic acid derivatives. Mechanistic inquiry is performed to address the limitations in scope.
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Affiliation(s)
- Chris M Seong
- University of Minnesota, Department of Chemistry, Minneapolis, Minnesota 55455, United States
| | - Courtney C Roberts
- University of Minnesota, Department of Chemistry, Minneapolis, Minnesota 55455, United States
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12
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Liu S, Li Y, Zhang Y, Lin W. Materials design of edge-modified polymeric carbon nitride nanoribbons for the photocatalytic CO 2 reduction reaction. Phys Chem Chem Phys 2023; 25:9901-9908. [PMID: 36946309 DOI: 10.1039/d2cp05027g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Nanoribbon construction and modification with functional groups are important methods to improve the performance of photocatalysts. In this paper, density functional theory (DFT) calculations are applied to assess the electron absorption capacity of different model structures in the photocatalytic CO2 reduction reaction (CO2RR), i.e., melon-based carbon nitride nanoribbons (MNRs) and edge-modified melon-based carbon nitride nanoribbons (X-MNRs, X = NO2, CF3, CN, CHO, F, Cl, CCH, OH, SH, CH3, and H). It is found that X-MNRs (X = NO2, CN, CHO, CCH, OH, and H) have a significantly reduced band gap. Meanwhile, the VBM and CBM are effectively separated with the same optical absorption wavelength range, agreeing with the experimental observations. More importantly, the Gibbs free energy difference of the CO2RR rate-determining step is greatly reduced in MNRs, CHO-MNRs, CN-MNRs etc. with the formation of CO or HCOOH. The mechanism investigation indicates that the materials design via edge-group modification can optimize the CO2RR process.
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Affiliation(s)
- Shaohua Liu
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
| | - Yi Li
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, Fujian 361005, China
| | - Yongfan Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, Fujian 361005, China
| | - Wei Lin
- State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry, Fuzhou University, Fuzhou 350108, P. R. China.
- Fujian Provincial Key Laboratory of Theoretical and Computational Chemistry, Xiamen University, Xiamen, Fujian 361005, China
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13
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Feng Z, Marset X, Tostado J, Kircher J, She Z, Golz C, Mata RA, Simon M, Alcarazo M. 5-(Trifluorovinyl)dibenzothiophenium Triflate: Introducing the 1,1,2-Trifluoroethylene Tether in Drug-Like Structures. Chemistry 2022; 29:e202203966. [PMID: 36545870 DOI: 10.1002/chem.202203966] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 12/21/2022] [Accepted: 12/21/2022] [Indexed: 12/24/2022]
Abstract
This manuscript reports the synthesis and structure of an unprecedented sulfonium salt, 5-(trifluorovinyl)dibenzothiophenium triflate, and its use as a versatile reagent for the introduction of the bioisosteric 1,1,2-trifluoroethylene linker in drug-like structures. The protocol developed consists of the reaction of this compound with alcohols and phenols to deliver a complete set of 1,2,2-trifluoro-2-(alkoxy-/aryloxy)ethyl sulfonium salts, which have been purified by column chromatography and fully characterized. Subsequent single electron reduction under mild photochemical conditions efficiently affords the corresponding fluoroalkyl radicals that are trapped either intra- or intermolecularly through their reaction with (hetero)arenes. Theoretical calculations are used to evaluate the conformational consequences derived from the presence of the CF2 -CHF tether.
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Affiliation(s)
- Zeyu Feng
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Xavier Marset
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Jaime Tostado
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Johannes Kircher
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstr 6, 37077, Göttingen, Germany
| | - Zhijie She
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Christopher Golz
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Ricardo A Mata
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstr 6, 37077, Göttingen, Germany
| | - Martin Simon
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
| | - Manuel Alcarazo
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität Göttingen, Tammannstr 2, 37077, Göttingen, Germany
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14
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Bouchet D, Varlet T, Masson G. Strategies toward the Difunctionalizations of Enamide Derivatives for Synthesizing α,β-Substituted Amines. Acc Chem Res 2022; 55:3265-3283. [PMID: 36318762 DOI: 10.1021/acs.accounts.2c00540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Enamide and enecarbamate derivatives containing a nucleophilic center at the β-position from their nitrogen atom as well as a latent electrophilic site at their α-position are interesting motifs in organic chemistry. This dual reactivity─analogous that of the enamines─enables difunctionalization and increased structural complexity. Furthermore, an electron-withdrawing group on nitrogen drastically increases their stability. In that respect, enamides and enecarbamates are excellent partners for multicomponent transformations, and our research primarily focuses on these compounds in particular.Difunctionalization generally occurs through the nucleophilic addition of the enecarbamate on an electrophile to form iminium, which can subsequently react with a nucleophilic species. Although potent, such an approach is highly challenging due to the low stability of the intermediate iminium, leading to undesired hydrolysis or oligomerization. Epimerization, competitivity, and compatibility issues between the reaction partners are additional hindrances to developing these methodologies. To overcome these limitations, we described many complementary strategies.To control the enantioselectivity of these transformations, chiral phosphoric acids were found to be particularly well-suited to activate multiple reactants due to the formation of a hydrogen bonds network, allowing for an organized transition state in a chiral pocket. Interestingly, when deprotonated as phosphates, they can also play the role of ligands for Lewis acidic metals.To avoid iminium oligomerization, we successfully used stabilized α-arylated enamides. However, this approach was restricted to a simple nucleophilic addition at the β-position. To achieve the difunctionalizations of α-unsubstituted derivatives, we explored reversibly linked nucleophile and electrophile to address their compatibility problem. Alternatively, we devised a sequential methodology for resolving the stability issue of the N-acyl iminium based on its intermediate trapping using a temporary nucleophile (alcohol or thiol). Interestingly, the trapping agent could further be displaced by the desired final α-substituent under Lewis acidic or photocatalytic activation. This led us to design new chiral and bifunctional phosphoric acid catalysts bearing chromophores to merge asymmetric organocatalysis and photochemistry.These photocatalysis studies incited us to focus on radical processes to manage original functionalizations that would not be feasible otherwise. β-Alkylation and β-trifluoromethylation of enecarbamates via visible-light-promoted atom transfer radical additions were successfully performed. As β-allylations remained unattainable with the precedent methods, we eventually turned our attention to cerium(IV)-mediated oxidative single electron transfers. It allowed for singly occupied molecular orbital activation of these substrates to elicit their umpolung reactivity.Thus, the functionalization of enecarbamate derivatives appears as a valid synthetic strategy for obtaining important building blocks for agrochemical, pharmaceutical, and cosmetic industries, including diamines, haloamines, aminotryptamines, and less accessible trifluoromethylated or allylic compounds.
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Affiliation(s)
- Damien Bouchet
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, ICSN-CNRS UPR 2301, 1 avenue de la Terasse, Gif-sur-Yvette 91198 Cedex, France
| | - Thomas Varlet
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, ICSN-CNRS UPR 2301, 1 avenue de la Terasse, Gif-sur-Yvette 91198 Cedex, France
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, ICSN-CNRS UPR 2301, 1 avenue de la Terasse, Gif-sur-Yvette 91198 Cedex, France.,HitCat, Seqens-CNRS joint laboratory, Seqens'Lab, 8 Rue de Rouen, Porcheville 78440, France
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15
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Baguia H, Evano G. Direct Perfluoroalkylation of C−H Bonds in (Hetero)arenes. Chemistry 2022; 28:e202200975. [DOI: 10.1002/chem.202200975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Hajar Baguia
- Laboratoire de Chimie Organique Service de Chimie et Physico-Chimie Organiques Université libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brussels Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique Service de Chimie et Physico-Chimie Organiques Université libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brussels Belgium
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16
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Yamamoto Y, Nakazato Y, Tadano R, Yasui T. Combined Computational and Experimental Study on [5 + 2] Cycloaddition of 2-Trifluoromethylated Oxidopyrylium Species Leading to 1-(Trifluoromethyl)-8-oxabicyclo[3.2.1]oct-3-en-2-ones. J Org Chem 2022; 87:10216-10228. [PMID: 35849440 DOI: 10.1021/acs.joc.2c01189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Trifluoromethylation of furfural using the Ruppert-Prakash reagent (TMSCF3) and subsequent photo-Achmatowicz reaction afforded 6-hydroxy-2-(trifluoromethyl)-2H-pyran-3(6H)-one. After acetylation, the resultant 6-acetoxy-2-(trifluoromethyl)-2H-pyran-3(6H)-one was transformed into various 1-(trifluoromethyl)-8-oxabicyclo[3.2.1]oct-3-en-2-one derivatives through a base-mediated oxidopyrylium [5 + 2] cycloaddition. The reactivity and selectivity of the 2-trifluoromethylated oxidopyrylium species toward [5 + 2] cycloaddition were analyzed using density functional theory calculations.
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Affiliation(s)
- Yoshihiko Yamamoto
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Yuya Nakazato
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Ryu Tadano
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
| | - Takeshi Yasui
- Department of Basic Medicinal Sciences, Graduate School of Pharmaceutical Sciences, Nagoya University, Chikusa, Nagoya 464-8601, Japan
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17
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Kim M, You E, Kim J, Hong S. Site-Selective Pyridylic C-H Functionalization by Photocatalytic Radical Cascades. Angew Chem Int Ed Engl 2022; 61:e202204217. [PMID: 35481719 DOI: 10.1002/anie.202204217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Indexed: 11/08/2022]
Abstract
An efficient pyridylic C(sp3 )-H functionalization has been developed through photocatalytic radical-mediated fluoroalkylation or cascade reactions. This method is enabled by the reversible formation of alkylidene dihydropyridine intermediates via the facile enolate formation of C4-alkyl N-amidopyridinium salts in the absence of an external base, thereby establishing the conditions necessary for subsequent intermolecular radical trapping. Rapid structural diversification of the pyridylic site can be achieved through photocatalytic multicomponent cascade reactions involving alkene trifluoromethylation, SO2 -reincorporation, and sulfonyl radical addition. This operationally simple method features a broad substrate scope and high chemoselectivity and offers a unique approach for the rational modification of the heterobenzylic C-H bonds of pyridines and quinolines with uniform site-selective control. Furthermore, experimental and theoretical studies were performed to elucidate the reaction mechanism.
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Affiliation(s)
- Myojeong Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Euna You
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Jieun Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.,Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon, 34141, Republic of Korea
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18
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Tran C, Hamze A. Recent Developments in the Photochemical Synthesis of Functionalized Imidazopyridines. Molecules 2022; 27:molecules27113461. [PMID: 35684399 PMCID: PMC9182178 DOI: 10.3390/molecules27113461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Revised: 05/20/2022] [Accepted: 05/25/2022] [Indexed: 12/04/2022] Open
Abstract
Imidazopyridines constitute one of the most important scaffolds in medicinal chemistry, as their skeleton could be found in a myriad of biologically active molecules. Although numerous strategies were elaborated for imidazopyridine preparation in the 2010s, novel eco-compatible synthetic approaches have emerged, conscious of climate change concerns. In this framework, photochemical methods have been promoted to conceive this heterocyclic motif over the last decade. This review covers the recently published works on synthesizing highly functionalized imidazopyridines by light induction.
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19
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Patel RI, Singh J, Sharma A. Visible Light‐Mediated Manipulation of 1,n‐Enynes in Organic Synthesis. ChemCatChem 2022. [DOI: 10.1002/cctc.202200260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Roshan I. Patel
- IIT Roorkee: Indian Institute of Technology Roorkee CHEMISTRY INDIA
| | - Jitender Singh
- IIT Roorkee: Indian Institute of Technology Roorkee CHEMISTRY INDIA
| | - Anuj Sharma
- Indian Institute of Technoology Roorkee Deptartment of Chemistry Room 303DDepartment of Chemistry, IIT Roorkee 247667 Roorkee INDIA
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20
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Kim M, You E, Kim J, Hong S. Site‐Selective Pyridylic C–H Functionalization by Photocatalytic Radical Cascades. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Myojeong Kim
- KAIST: Korea Advanced Institute of Science and Technology Chemistry KOREA, REPUBLIC OF
| | - Euna You
- KAIST: Korea Advanced Institute of Science and Technology Chemistry KOREA, REPUBLIC OF
| | - Jieun Kim
- KAIST: Korea Advanced Institute of Science and Technology Chemistry KOREA, REPUBLIC OF
| | - Sungwoo Hong
- Korea Advanced Institute of Science and Technology KAIST Department of Chemistry Yusung Gu (KAIST) 34141 Daejeon KOREA, REPUBLIC OF
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21
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Ma R, Deng Z, Wang KH, Wang J, Huang D, Su Y, Hu Y, Lv X. Photoinduced Trifluoromethylation with CF 3Br as a Trifluoromethyl Source: Synthesis of α-CF 3-Substituted Ketones. ACS OMEGA 2022; 7:14357-14362. [PMID: 35573213 PMCID: PMC9089747 DOI: 10.1021/acsomega.2c01241] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 03/31/2022] [Indexed: 05/22/2023]
Abstract
An efficient and novel photoinduced trifluoromethylation employing CF3Br as a trifluoromethyl source is described. With commercially accessible fac-Ir(III)(ppy)3 as the catalyst, radical trifluoromethylation between O-silyl enol ether and CF3Br occurs successfully. This method provides various α-CF3-substituted ketones with a broad substrate scope in good yields under mild reaction conditions.
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Affiliation(s)
- Ransong Ma
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Zhoubin Deng
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Ke-Hu Wang
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Junjiao Wang
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Danfeng Huang
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yingpeng Su
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
| | - Yulai Hu
- College
of Chemistry and Chemical Engineering, Northwest
Normal University, 967 Anning East Road, Lanzhou 730070, P. R. China
- State
Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P. R. China
| | - Xiaobo Lv
- Shanghai
Sinofluoro Chemicals Co., Ltd., Shanghai 201321, P. R.
China
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22
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Shen GB, Yu HY, Xu Z, Cao W, Liu J, Xie L, Yan M. Theoretical study for evaluating and discovering organic hydride compounds as novel trifluoromethylation reagents. Org Biomol Chem 2022; 20:2831-2842. [PMID: 35294516 DOI: 10.1039/d2ob00056c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Trifluoromethylation reaction is one of the significant and practical organic chemical reactions, and the design and discovery of novel trifluoromethylation reagents have been attracting more and more attention. Trifluoromethyl-substituted organic hydride compounds (XH) have the potential to be novel trifluoromethylation reagents in organic synthesis due to the favorable tendency of XH˙+ releasing ˙CF3 to form stable aromatic structures in terms of thermodynamics. The key elementary step of the trifluoromethylation is the radical cation (XH˙+) generation by catalysis or single-electron activation releasing ˙CF3 to form a stable aromatic structure, which also provides the thermodynamic driving force of the chemical process. In this work, 47 new trifluoromethylation reagent candidates of XHs were designed and calculated for the Gibbs free energy and activation free energy [ΔG‡RD(XH˙+)] of XH˙+ releasing ˙CF3 using the density functional theory (DFT) method, in order to quantitatively measure the reactivity of XHs as trifluoromethylation reagents, and to establish the molecular library as well as reactivity database of novel trifluoromethylation reagents for synthetic chemists. According to the and ΔG‡RD(XH˙+) values, all the XHs can be reasonably divided into 3 classes, including class 1 (excellent trifluoromethylation reagents), class 2 (potential trifluoromethylation reagents) and class 3 (not trifluoromethylation reagents). To our delight, 15 XHs with a 1,4-dihydropyridine structure and 3 XHs with a 3,4-dihydropyrimidin-2-one structure are identified to be novel excellent and potential trifluoromethylation reagents, respectively, according to their reactivity data. The relationship between the structural features, including methylation, heteroatom, substituents, conjugated structure and so on, and the reactivity of XHs as trifluoromethylation reagents are also discussed in this work. The computation results indicate that trifluoromethyl-substituted 1,4-dihydropyridine compounds and 3,4-dihydropyrimidin-2-one analogues could be possible trifluoromethylation reagents in organic synthesis. This work may provide the theoretical basis and references for discovering organic hydride compounds as novel reagents for trifluoromethylation or other alkylation reactions.
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Affiliation(s)
- Guang-Bin Shen
- School of Medical Engineering, Jining Medical University, Jining, Shandong, 272000, P. R. China
| | - Hao-Yun Yu
- School of Medical Engineering, Jining Medical University, Jining, Shandong, 272000, P. R. China
| | - Zhihao Xu
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276800, P. R. China.
| | - Weilong Cao
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276800, P. R. China.
| | - Jie Liu
- School of Medical Engineering, Jining Medical University, Jining, Shandong, 272000, P. R. China
| | - Li Xie
- School of Medical Engineering, Jining Medical University, Jining, Shandong, 272000, P. R. China
| | - Maocai Yan
- School of Pharmacy, Jining Medical University, Rizhao, Shandong, 276800, P. R. China.
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23
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Guo P, Tao M, Xu WW, Wang AJ, Li W, Yao Q, Tong J, He CY. Synthesis of Secondary Trifluoromethylated Alkyl Bromides Using 2-Bromo-3,3,3-trifluoropropene as a Radical Acceptor. Org Lett 2022; 24:2143-2148. [PMID: 35274952 DOI: 10.1021/acs.orglett.2c00425] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Herein, the first example using commercially available 2-bromo-3,3,3-trifluoropropene (BTP) as a radical acceptor has been reported. Taking advantage of this strategy, a wide range of secondary trifluoromethylated alkyl bromides were synthesized in good to excellent yields with broad functional group tolerance by using redox-active esters as a radical precursor. The practicality of this protocol was further demonstrated by diverse derivations and direct modification of biologically active molecules.
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Affiliation(s)
- Peng Guo
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Maoling Tao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Wen-Wen Xu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - An-Jun Wang
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Weipiao Li
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China
| | - Qiuli Yao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou 563000,P. R. China
| | - Jie Tong
- School of Medicine, Yale University, New Haven, Connecticut 06510, United States
| | - Chun-Yang He
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province, Generic Drug Research Center of Guizhou Province, Zunyi Medical University, Zunyi, Guizhou 563000, P. R. China.,Key Laboratory of Basic Pharmacology of Ministry of Education and Joint International Research Laboratory of Ethnomedicine of Ministry of Education, School of Pharmacy, Zunyi Medical University, Zunyi, Guizhou 563000,P. R. China
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24
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25
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Simur TT, Ye T, Yu YJ, Zhang FL, Wang YF. C–F bond functionalizations of trifluoromethyl groups via radical intermediates. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.08.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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26
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Yerien DE, Barata-Vallejo S, Mansilla D, Postigo A. Rose Bengal-photocatalyzed perfluorohexylation reactions of organic substrates in water. Applications to late-stage syntheses. Photochem Photobiol Sci 2022; 21:803-812. [PMID: 35083730 DOI: 10.1007/s43630-021-00154-3] [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: 10/14/2021] [Accepted: 12/01/2021] [Indexed: 10/19/2022]
Abstract
The Rose Bengal-photocatalyzed perfluorohexylation of olefins, alkynes, and electron-rich aromatic compounds in water was achieved employing perfluorohexyl iodide as fluoroalkyl source and TMEDA as sacrificial donor under green LED irradiation. Alkenes and alkynes rendered products derived from the atom transfer radical addition (ATRA) pathway, and in the case of alkynes, exclusively as E-stereoisomers. These are the first examples of photocatalyzed ATRA reactions carried out excursively in water alone. The reactions of aromatic compounds under the current protocol in water present the advantage of employing a perfluoroalkyl iodide (C6F13-I) as source of perfluorohexyl radicals. Examples of photocatalytic late-stage incorporations of fluoroalkyl moieties into two commercial drugs of widespread use are reported.
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Affiliation(s)
- Damian E Yerien
- Departamento de Ciencias Químicas, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, CP 1113, Buenos Aires, Argentina
| | - Sebastián Barata-Vallejo
- Departamento de Ciencias Químicas, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, CP 1113, Buenos Aires, Argentina. .,ISOF, Consiglio Nazionale Delle Ricerche, Via P. Gobetti 101, 40129, Bologna, Italy.
| | - Daniela Mansilla
- Departamento de Ciencias Químicas, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, CP 1113, Buenos Aires, Argentina
| | - Al Postigo
- Departamento de Ciencias Químicas, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Junín 954, CP 1113, Buenos Aires, Argentina.
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27
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Li H, Wang F, Zhu S, Chu L. Selective Fluoromethyl Couplings of Alkynes via Nickel Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Huan Li
- State Key Laboratory for Modification of Chemical Fibers Sand Polymer Materials Center for Advanced Low-Dimension Materials College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China
| | - Fang Wang
- State Key Laboratory for Modification of Chemical Fibers Sand Polymer Materials Center for Advanced Low-Dimension Materials College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China
| | - Shengqing Zhu
- State Key Laboratory for Modification of Chemical Fibers Sand Polymer Materials Center for Advanced Low-Dimension Materials College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China
| | - Lingling Chu
- State Key Laboratory for Modification of Chemical Fibers Sand Polymer Materials Center for Advanced Low-Dimension Materials College of Chemistry Chemical Engineering and Biotechnology Donghua University Shanghai 201620 China
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28
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Lemmens V, Vos C, Bugaev AL, Vercammen J, Van Velthoven N, Gascon J, De Vos DE. Ru-Bipyridine Entrapped in the Supercages of EMC-1 Faujasite as Catalyst for the Trifluoromethylation of Arenes. ACS APPLIED MATERIALS & INTERFACES 2022; 14:971-977. [PMID: 34958546 DOI: 10.1021/acsami.1c19655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Trifluoromethyl (CF3) groups are versatile structural motifs especially in the field of agrochemicals and pharmaceuticals. However, current trifluoromethylation reactions are generally associated with stoichiometric amounts of transition metals/metal oxidants, homogeneous catalysts, high temperatures, and expensive trifluoromethylating agents. In this work, the homogeneous photocatalyst Ru(bipy)32+ is entrapped in the pores of a faujasite support (EMC-1) via a "ship-in-a-bottle" strategy. The formation of the coordination compound was confirmed by Fourier transform infrared (FTIR), UV-Vis spectroscopy, and X-ray absorption spectroscopy (XAS). Due to its high stability toward acidified environments, this single-site heterogeneous catalyst is suitable for the trifluoromethylation of synthetically interesting (hetero)arenes under visible-light irradiation at room temperature. Furthermore, the heterogeneous catalyst could efficiently be reused for at least three times with minimal catalyst leaching/deactivation.
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Affiliation(s)
- Vincent Lemmens
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Christophe Vos
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Aram L Bugaev
- The Smart Materials Research Institute, Southern Federal University, Rostov-on-Don 344090, Russia
| | - Jannick Vercammen
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Niels Van Velthoven
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
| | - Jorge Gascon
- King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
| | - Dirk E De Vos
- Centre For Membrane Separations, Adsorption, Catalysis, and Spectroscopy for Sustainable Solutions (cMACs), KU Leuven, Leuven 3001, Belgium
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29
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Hu Y, Wang X, Ren N, Li N, Li J, Chen J, Zhang H, Deng H, Cao W, Lin J. A Convenient Synthesis of Fluoroalkylated Benzimidazole‐ or Indole‐fused Benzoxazines. European J Org Chem 2022. [DOI: 10.1002/ejoc.202101501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Yijie Hu
- Shanghai University Department of chemistry CHINA
| | - Xiaoli Wang
- Shanghai University Department of chemistry CHINA
| | - Nan Ren
- Shanghai University Department of chemistry CHINA
| | - Na Li
- Shanghai University Qianweichang College CHINA
| | - Jianyang Li
- Shanghai University Qianweichang College CHINA
| | - Jie Chen
- Shanghai University Department of chemistry CHINA
| | - Hui Zhang
- Shanghai University Laboratory for Microstructures and Instrumental Analysis and Research Center CHINA
| | - Hongmei Deng
- Shanghai University Laboratory for Microstructures and instrumental Analysis and Research center CHINA
| | - Weiguo Cao
- Shanghai University Department of chemistry CHINA
| | - Jinhong Lin
- Shanghai Institute of Organic Chemistry Key Laboratory of Organofluorine Chemistry 345 Lingling Road 200032 Shanghai CHINA
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30
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Kani R, Inuzuka T, Kubota Y, Funabiki K. Synthesis of 1‐Trifluoromethylated Propargyl Alcohols by Two Successive Reactions of Cyclopentylmagnesium Bromide in a One‐Pot Manner. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202100700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Ryunosuke Kani
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Toshiyasu Inuzuka
- Division of Instrumental Analysis Life Science Research Center Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Yasuhiro Kubota
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
| | - Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science Gifu University 1-1 Yanagido Gifu 501-1193 Japan
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31
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Huang W, Zhang R, Zhang R, Yu J, Wang M. Radical hydrotrifluoromethylation of ynamides: a route toward β-CF 3 enamides. Org Chem Front 2022. [DOI: 10.1039/d2qo00045h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here a radical hydrotrifluoromethylation of ynamides to provide an alternative route toward β-CF3 enamides.
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Affiliation(s)
- Wanqiao Huang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Ruzhong Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Ruxue Zhang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Jianxin Yu
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Mang Wang
- Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis, College of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
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32
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Zhu Y, Xiao T, Xia D, Yang W. Recent Advances in the Decarboxylative Fluoroalkylation of Fluoroalkyl Carboxylic Acids. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202208017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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33
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Wang Z, Sun Y, Shen LY, Yang WC, Meng F, Li P. Photochemical and electrochemical strategies in C–F bond activation and functionalization. Org Chem Front 2022. [DOI: 10.1039/d1qo01512e] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The recent advances in photochemical or electrochemical C–F bond activation and functionalization have been summarized and discussed.
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Affiliation(s)
- Zhanghong Wang
- College of Eco-Environmental Engineering, Guizhou Minzu University, Guiyang 550025, PR China
| | - Yu Sun
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Liu-Yu Shen
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Wen-Chao Yang
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Fei Meng
- School of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, P. R. China
| | - Pinhua Li
- Anhui Laboratory of Clean Catalytic Engineering, Anhui Laboratory of Functional Complexes for Materials Chemistry and Application, College of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. of China
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34
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Belen’kii LI, Gazieva GA, Evdokimenkova YB, Soboleva NO. The literature of heterocyclic chemistry, Part XX, 2020. ADVANCES IN HETEROCYCLIC CHEMISTRY 2022. [DOI: 10.1016/bs.aihch.2022.10.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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35
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Li H, Wang F, Zhu S, Chu L. Selective Fluoromethyl Couplings of Alkynes via Nickel Catalysis*. Angew Chem Int Ed Engl 2021; 61:e202116725. [PMID: 34962343 DOI: 10.1002/anie.202116725] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Indexed: 11/09/2022]
Abstract
We describe here a Ni-catalyzed intermolecular carbo-fluoromethylation of alkynes with aliphatic halides and fluoromethyl halides (BrCF 2 H and ICH 2 F) in the presence of zinc, enabling the facile and selective access to a diverse range of biologically valuable CF 2 H/CH 2 F-incorporated alkenes with excellent regio- and stereo-selectivity. Notably, merging intramolecular radical cyclization with fluoromethyl coupling enables the expedient constructions of CF 2 H/CH 2 F-incorporated lactones and lactams with high efficiency and selectivity. Mechanistic studies disclose that this catalytic protocol proceeds via a radical addition to an alkyne followed by selective coupling with the fluoromethyl unit.
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Affiliation(s)
- Huan Li
- Donghua University - Songjiang Campus: Donghua University, CALM, 2999 NORTH RENMIN ROAD, 201620, Shanghai, CHINA
| | - Fang Wang
- Donghua University - Songjiang Campus: Donghua University, CALM, 2999 NORTH RENMIN ROAD, 201620, Shanghai, CHINA
| | - Shengqing Zhu
- Donghua University - Songjiang Campus: Donghua University, CALM, 2999 NORTH RENMIN ROAD, 201620, Shanghai, CHINA
| | - Lingling Chu
- Donghua University, Center for Advanced Low-Dimension Materials, 2999 Renmin Road, Songjiang District, 201620, Shanghai, CHINA
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36
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Shen Y, Lei N, Lu C, Xi D, Geng X, Tao P, Su Z, Zheng K. Construction of sterically congested oxindole derivatives via visible-light-induced radical-coupling. Chem Sci 2021; 12:15399-15406. [PMID: 34976361 PMCID: PMC8635216 DOI: 10.1039/d1sc05273j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/03/2021] [Indexed: 01/04/2023] Open
Abstract
The oxindole scaffold represents an important structural feature in many natural products and pharmaceutically relevant molecules. Herein, we report a visible-light-induced modular methodology for the synthesis of complex 3,3'-disubstituted oxindole derivatives. A library of valuable fluoroalkyl-containing highly sterically congested oxindole derivatives can be synthesized by a catalytic three-component radical coupling reaction under mild conditions (metal & photocatalyst free, >80 examples). This strategy shows high functional group tolerance and broad substrate compatibility (including a wide variety of terminal or non-terminal alkenes, conjugated dienes and enynes, and a broad array of polyfluoroalkyl iodide and oxindoles), which enables modular modification of complex drug-like compounds in one chemical step. The success of solar-driven transformation, large-scale synthesis, and the late-stage functionalization of bioactive molecules, as well as promising tumor-suppressing biological activities, highlights the potential for practical applications of this strategy. Mechanistic investigations, including a series of control experiments, UV-vis spectroscopy and DFT calculations, suggest that the reaction underwent a sequential two-step radical-coupling process and the photosensitive perfluoroalkyl benzyl iodides are key intermediates in the transformation.
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Affiliation(s)
- Yanling Shen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Ning Lei
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Cong Lu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Dailin Xi
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Xinxin Geng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Pan Tao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Ke Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
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37
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Baguia H, Evano G. Copper-Catalyzed Direct Perfluoroalkylation of Heteroarenes. Chemistry 2021; 28:e202103599. [PMID: 34842313 DOI: 10.1002/chem.202103599] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Indexed: 02/04/2023]
Abstract
An efficient and broadly applicable process is reported for the copper-catalyzed direct perfluoroalkylation of C-H bonds in heteroarenes with commercially available perfluoroalkyl iodides. This reaction is based on a simple combination of copper(I) iodide and 1,10-phenanthroline enabling the easy reduction of perfluoroalkyl iodides to the corresponding radical species that add to a wide range of heteroarenes including benzofurans, benzothiophenes, (aza)indoles, furans and pyrroles. High levels of regioselectivity were obtained in all cases and the efficiency and robustness of this process was highlighted by the direct perfluoroalkylation of furan-containing peptides.
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Affiliation(s)
- Hajar Baguia
- Laboratoire de Chimie Organique Service de Chimie et Physic Chimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06 1050, Brussels, Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique Service de Chimie et Physic Chimie Organiques, Université libre de Bruxelles (ULB), Avenue F. D. Roosevelt 50, CP160/06 1050, Brussels, Belgium
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38
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Liu Q, Lu Y, Sheng H, Zhang C, Su X, Wang Z, Chen X. Visible‐Light‐Induced Selective Photolysis of Phosphonium Iodide Salts for Monofluoromethylations. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202111006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Qiang Liu
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Yu Lu
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - He Sheng
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Chao‐Shen Zhang
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiao‐Di Su
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Zhi‐Xiang Wang
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
| | - Xiang‐Yu Chen
- School of Chemical Sciences University of Chinese Academy of Sciences Beijing 100049 China
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39
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Wang L, Zhang H, Zhu C, Feng C. Expedient Trifluoromethylacylation of Styrenes Enabled by Photoredox Catalysis. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100599] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lu Wang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Heng Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Chuan Zhu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University 30 South Puzhu Road Nanjing Jiangsu 211816 China
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40
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Tagami T, Aoki Y, Kawamura S, Sodeoka M. 1,2-Bis-perfluoroalkylations of alkenes and alkynes with perfluorocarboxylic anhydrides via the formation of perfluoroalkylcopper intermediates. Org Biomol Chem 2021; 19:9148-9153. [PMID: 34523640 DOI: 10.1039/d1ob01529j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel, Cu-mediated protocol toward the 1,2-bis-perfluoroalkyaltion of alkenes/alkynes was developed. The method proceeded with perfluorocarboxylic anhydrides as inexpensive and readily available perfluoroalkyl sources. Diacyl peroxide was generated in situ from the perfluorocarboxylic anhydrides and H2O2. The key step in this reaction is the formation of a stable perfluoroalkylcopper intermediate that is achieved with the aid of a bipyridyl ligand. Subsequent reaction of the intermediate with perfluoroalkyl-containing alkyl or vinyl radicals affords the desired products.
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Affiliation(s)
- Takuma Tagami
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Yuma Aoki
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
| | - Shintaro Kawamura
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. .,Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- Catalysis and Integrated Research Group, RIKEN Center for Sustainable Resource Science, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan. .,Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, RIKEN, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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41
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Wang X, Sun X, Li N, Chen J, Zhang H, Deng H, Lin JH, Cao W. The synthesis of perfluoroalkylated indolizines via tandem cyclization/aromatization. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2021.109900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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42
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Wang HN, Dong JY, Shi J, Zhang CP. Trifluoromethylselenolation reactions using the versatile [Me4N][SeCF3] reagent. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132476] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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43
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Dong X, Jiang W, Hua D, Wang X, Xu L, Wu X. Radical-mediated vicinal addition of alkoxysulfonyl/fluorosulfonyl and trifluoromethyl groups to aryl alkyl alkynes. Chem Sci 2021; 12:11762-11768. [PMID: 34659713 PMCID: PMC8442677 DOI: 10.1039/d1sc03315h] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 08/02/2021] [Indexed: 12/18/2022] Open
Abstract
The addition of sulfonyl radicals to alkenes and alkynes is a valuable method for constructing useful highly functionalized sulfonyl compounds. The underexplored alkoxy- and fluorosulfonyl radicals are easily accessed by CF3 radical addition to readily available allylsulfonic acid derivatives and then β-fragmentation. These substituted sulfonyl radicals add to aryl alkyl alkynes to give vinyl radicals that are trapped by trifluoromethyl transfer to provide tetra-substituted alkenes bearing the privileged alkoxy- or fluorosulfonyl group on one carbon and a trifluoromethyl group on the other. This process exhibits broad functional group compatibility and allows for the late-stage functionalization of drug molecules, demonstrating its potential in drug discovery and chemical biology. An unprecedented method for vicinal addition of alkoxysulfonyl/fluorosulfonyl and trifluoromethyl groups to aryl alkyl alkynes has been developed to afford useful alkenylsulfonate esters and alkenylsulfonyl fluorides.![]()
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Affiliation(s)
- Xinrui Dong
- State Key Laboratory of Natural Medicines, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University Nanjing 211198 China
| | - Wenhua Jiang
- State Key Laboratory of Natural Medicines, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University Nanjing 211198 China
| | - Dexiang Hua
- State Key Laboratory of Natural Medicines, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University Nanjing 211198 China
| | - Xiaohui Wang
- State Key Laboratory of Natural Medicines, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University Nanjing 211198 China
| | - Liang Xu
- School of Chemistry and Chemical Engineering, Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University Shihezi 832003 China
| | - Xiaoxing Wu
- State Key Laboratory of Natural Medicines, Department of Medicinal Chemistry, School of Pharmacy, China Pharmaceutical University Nanjing 211198 China
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44
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Liu Q, Lu Y, Sheng H, Zhang CS, Su XD, Wang ZX, Chen XY. Visible-Light-Induced Selective Photolysis of Phosphonium Iodide Salts for Monofluoromethylations. Angew Chem Int Ed Engl 2021; 60:25477-25484. [PMID: 34490742 DOI: 10.1002/anie.202111006] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Indexed: 11/09/2022]
Abstract
The sigma (σ)-hole effect has emerged as a promising tool to construct novel architectures endowed with new properties. A simple yet effective strategy for the generation of monofluoromethyl radicals is a continuing challenge within the synthetic community. Fluoromethylphosphonium salts are easily available, air- and thermally stable, as well as simple-to-handle. Herein, we report the ability of the σ-hole effect to facilitate the visible-light-triggered photolysis of phosphonium iodide salts, a charge-transfer complex, selectively giving fluoromethyl radicals. The usefulness and versatility of this new protocol are demonstrated through the mono-, di-, and trifluoromethylation of a variety of alkenes.
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Affiliation(s)
- Qiang Liu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu Lu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - He Sheng
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chao-Shen Zhang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao-Di Su
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiang-Yu Chen
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
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45
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Shen J, Xu J, He L, Liang C, Li W. Application of Langlois’ reagent (NaSO2CF3) in C–H functionalisation. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.09.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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46
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Mei L, Moutet J, Stull SM, Gianetti TL. Synthesis of CF 3-Containing Spirocyclic Indolines via a Red-Light-Mediated Trifluoromethylation/Dearomatization Cascade. J Org Chem 2021; 86:10640-10653. [PMID: 34255497 DOI: 10.1021/acs.joc.1c01313] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A red-light-mediated nPr-DMQA+-catalyzed cascade intramolecular trifluoromethylation and dearomatization of indole derivatives with Umemoto's reagent has been developed. This protocol provides a facile and efficient approach for the construction of functionalized and potentially biologically important CF3-containing 3,3-spirocyclic indolines with moderate to high yields and excellent diastereoselectivities under mild conditions. The success of multiple gram-scale (1 and 10 g) experiments further highlights the robustness and practicality of this protocol and the merit of the employment of red light. Mechanistic studies support the formation of a crucial CF3 radical species and a dearomatized benzyl carbocation intermediate.
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Affiliation(s)
- Liangyong Mei
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Jules Moutet
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Savannah M Stull
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
| | - Thomas L Gianetti
- Department of Chemistry and Biochemistry, University of Arizona, Tucson, Arizona 85721, United States
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47
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Nishiyama Y, Fujii A, Mori H. Photoreduction synthesis of various azoxybenzenes by visible-light irradiation under continuous flow conditions. J Flow Chem 2021. [DOI: 10.1007/s41981-021-00190-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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48
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Li B, Zeng W, Wang L, Geng Z, Loh TP, Xie P. Visible-Light-Induced Trifluoromethylation of Allylic Alcohols. Org Lett 2021; 23:5235-5240. [PMID: 34156254 DOI: 10.1021/acs.orglett.1c01767] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
An organic photoredox-catalyzed dehydroxylative trifluoromethylation of allylic alcohols was developed in an environmentally benign manner. In this reaction, the readily available CF3SO2Na was selected as the trifluoromethylation reagent. The in situ generated byproduct SO2 was reutilized to activate C-OH bond, which enabled this dehydroxylative trifluoromethylation to be performed conveniently. A variety of multifunctionalized CF3-allylic compounds were obtained in high yields and excellent stereoselectivity.
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Affiliation(s)
- Bowen Li
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Wubing Zeng
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Lin Wang
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
| | - Zhishuai Geng
- School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Teck-Peng Loh
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, 637371 Singapore
| | - Peizhong Xie
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, P. R. China
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49
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50
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Zheng L, Cai L, Tao K, Xie Z, Lai Y, Guo W. Progress in Photoinduced Radical Reactions using Electron Donor‐Acceptor Complexes. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100009] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Lvyin Zheng
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Liuhuan Cai
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Kailiang Tao
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Zhen Xie
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
| | - Yin‐Long Lai
- College of Chemistry and Civil Engineering Shaoguan University Shaoguan 512005 P. R. China
| | - Wei Guo
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province Gannan Normal University Ganzhou 341000 P. R. China
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