1
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Wu L, Li L, Zhao Y, Rui J, Zhan Y, Zhang L, Chen R, Zhou JS, Zhu C, Wu X. Nonactivated Aziridine Synthesis by Intermolecular Polarity-Mismatched Carboamination of Unactivated Alkenes with Unactivated Alkyl Halides. Org Lett 2024; 26:5609-5613. [PMID: 38949378 DOI: 10.1021/acs.orglett.4c01224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/02/2024]
Abstract
A general intermolecular polarity-mismatched carboamination reaction of unactivated alkenes with unactivated alkyl halides has been developed. A series of nonactivated alkyl-substituted aziridines were constructed in exclusive regioselectivity. The dual polarity-mismatched mechanism might be involved.
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Affiliation(s)
- Linlin Wu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Lei Li
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yao Zhao
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jiacheng Rui
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ying Zhan
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ling Zhang
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Rizhi Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jianrong Steve Zhou
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Chenjie Zhu
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Xiaojin Wu
- School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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2
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Lin SN, Deng Y, Zhong H, Mao LL, Ji CB, Zhu XH, Zhang X, Yang BM. Visible Light-Induced Radical Cascade Difluoromethylation/Cyclization of Unactivated Alkenes: Access to CF 2H-Substituted Polycyclic Imidazoles. ACS OMEGA 2024; 9:28129-28143. [PMID: 38973879 PMCID: PMC11223139 DOI: 10.1021/acsomega.4c01177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 06/07/2024] [Accepted: 06/11/2024] [Indexed: 07/09/2024]
Abstract
An efficient and mild protocol for the visible light-induced radical cascade difluoromethylation/cyclization of imidazoles with unactivated alkenes using easily accessible and bench-stable difluoromethyltriphenylphosphonium bromide as the precursor of the -CF2H group has been developed to afford CF2H-substituted polycyclic imidazoles in moderate to good yields. This strategy, along with the construction of Csp3-CF2H/C-C bonds, is distinguished by mild conditions, no requirement of additives, simple operation, and wide substrate scope. In addition, the mechanistic experiments have indicated that the difluoromethyl radical pathway is essential for the methodology.
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Affiliation(s)
- Sheng-Nan Lin
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Yuanyuan Deng
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Hanxun Zhong
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Liu-Liang Mao
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Cong-Bin Ji
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Xian-Hong Zhu
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Xiaolan Zhang
- College
of Chemistry and Environment Science, Shangrao
Normal University, Shangrao 334001, China
| | - Bin-Miao Yang
- Joint
School of National University of Singapore and Tianjin University, Fuzhou 350207, China
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3
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He C, Wang Q, Zhou X, Yi L, Zhang Z, Zhang C, Xie H, Huang Q, Qiu G, Yang M. Photocatalytic Cyclization Cascades by Radical Relay toward Pyrrolo[1,2- a]indoles: Synthesis, Mechanism, and Application. J Org Chem 2024; 89:3509-3524. [PMID: 38362658 DOI: 10.1021/acs.joc.3c02959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2024]
Abstract
A photocatalytic annulation cascade of unactivated N-alkene-linked indoles with Langlois' reagent by a radical relay is developed at room temperature under blue LED irradiation. The reaction afforded a series of tri/difluoromethylated pyrrolo[1,2-a]indoles in moderate to good yields. The DFT study suggests that the reaction is ascribed to a rhodamine 6G-induced cyclization cascade involving vinyl addition-radical relay and hydrogen-atom-abstraction (HAA) processes, and interestingly, pyrrolo[1,2-a]indoles are applied as fluorescent dyes into the fluorescence spectrum and live-cell imaging. This paper represents an initial example on photocatalytic cyclization cascades by radical relay and the HAA process.
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Affiliation(s)
- Chen He
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Qi Wang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Xiaoyang Zhou
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Lin Yi
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Zhiqiang Zhang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Chun Zhang
- School of Pharmaceutical and Materials Engineering, Taizhou University, Taizhou, Zhejiang Province 318000, China
| | - Haijiao Xie
- Hangzhou Yanqu Information Technology Co., Ltd., Y2, second Floor, Building 2, Xixi Legu Creative Pioneering Park, No. 712 Wen'er West Road, Xihu District, Hangzhou City, Zhejiang Province 310003, China
| | - Qitong Huang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
| | - Guanyinsheng Qiu
- College of Biological, Chemical Sciences and Engineering, Jiaxing University, Jiaxing 314001 Zhejiang, China
| | - Min Yang
- School of Pharmacy, Key Laboratory of Biomaterials and Biofabrication in Tissue Engineering of Jiangxi Province, Key Laboratory of Biomedical Sensors of Ganzhou, Gannan Medical University, Ganzhou, Jiangxi Province 341000, China
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4
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Brals J, McGuire TM, Watson AJB. A Chemoselective Polarity-Mismatched Photocatalytic C(sp 3 )-C(sp 2 ) Cross-Coupling Enabled by Synergistic Boron Activation. Angew Chem Int Ed Engl 2023; 62:e202310462. [PMID: 37622419 PMCID: PMC10952440 DOI: 10.1002/anie.202310462] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 08/26/2023]
Abstract
We report the development of a C(sp3 )-C(sp2 ) coupling reaction using styrene boronic acids and redox-active esters under photoredox catalysis. The reaction proceeds through an unusual polarity-mismatched radical addition mechanism that is orthogonal to established processes. Synergistic activation of the radical precursor and organoboron are critical mechanistic events. Activation of an N-hydroxyphthalimide (NHPI) ester by coordination to boron enables electron transfer, with decomposition leading to a nucleofuge rebound, activating the organoboron to radical addition. The unique mechanism enables chemoselective coupling of styrene boronic acids in the presence of other alkene radical acceptors. The scope and limitations of the reaction, and a detailed mechanistic investigation are presented.
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Affiliation(s)
- Jeremy Brals
- EaStCHEMSchool of ChemistryUniversity of St AndrewsPurdie Building, North HaughSt AndrewsKY16 9STUK
| | - Thomas M. McGuire
- AstraZenecaDarwin Building, Unit 310Cambridge Science Park, Milton RoadCambridgeCB4 0WGUK
| | - Allan J. B. Watson
- EaStCHEMSchool of ChemistryUniversity of St AndrewsPurdie Building, North HaughSt AndrewsKY16 9STUK
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5
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Wu Y, Liu H, Liu L, Yu JT. Metal-free polychloromethylation/cyclization of unactivated alkenes towards ring-fused tricyclic indolones and benzoimidazoles. Org Biomol Chem 2023; 21:7079-7084. [PMID: 37641965 DOI: 10.1039/d3ob01191g] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
Polychloromethylative cyclization of N-alkenyl indoles was developed under metal-free conditions to afford tricyclic pyridoindolones and pyrroloindolones in moderate to good yields. In the reaction, commercially available CHCl3 and CH2Cl2 were employed as tri- and dichloromethyl radical sources. Moreover, tri- and dichloromethylated polycyclic benzoimidazoles can also be obtained under standard conditions.
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Affiliation(s)
- Yechun Wu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Han Liu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Lingli Liu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
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6
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Zhang F, Wang F, Zhao Y, Chen R, Wu X. Denitrative Mizoroki–Heck reaction of unactivated alkenes. Org Chem Front 2023. [DOI: 10.1039/d3qo00132f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/31/2023]
Abstract
A general palladium-catalyzed denitrative Mizoroki–Heck reaction of unactivated alkenes has been developed with high E/Z selectivity.
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7
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Hu J, Du Q, Zhao Y, Zhang F, Chen R, Zhou JS, Wu X. Nickel-Catalyzed Chemo- and Regioselective Arylcyanation of β,γ-Unsaturated Amides. Org Lett 2022; 24:4328-4332. [PMID: 35686833 DOI: 10.1021/acs.orglett.2c01360] [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 nickel-catalyzed intermolecular arylcyanation of 8-aminoquinolinyl β,γ-unsaturated amides is reported. The three-component reaction directly afforded diverse β-cyano γ-aryl amides with exclusive chemo- and regioselectivity. The synthetic practicality of this approach is further demonstrated through multigram scale reaction, expanded transformations of the nitrile product, late-stage modification of complex molecules, and direct drug synthesis.
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Affiliation(s)
- Jinghui Hu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Qiang Du
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yao Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Fei Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Rizhi Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Jianrong Steve Zhou
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xiaojin Wu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China
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8
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Shan Y, Yang Z, Yu JT, Pan C. Metal-free polychloromethyl radical-initiated cyclization of unactivated N-allylindoles towards pyrrolo[1,2- a]indoles. Org Biomol Chem 2022; 20:5259-5263. [PMID: 35735246 DOI: 10.1039/d2ob00471b] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A metal-free polychloromethyl radical-initiated cyclization of unactivated alkenes was developed using CH2Cl2 and CHCl3 as the di- and trichloromethyl radical sources. Variously substituted N-allyl-indoles were successfully transformed into the corresponding C2-(di- and trichloromethyl) pyrrolo[1,2-a]indoles in moderate to good yields. This reaction has a broad substrate scope and good functional group tolerance. Dibromomethylated products can also be obtained using CH2Br2 under standard conditions.
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Affiliation(s)
- Yujia Shan
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Zixian Yang
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, Changzhou University, Changzhou 213164, P. R. China.
| | - Changduo Pan
- School of Chemical and Environmental Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
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9
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Li M, Li Y, Jia WY, Sun GQ, Gao F, Zhao GX, Qiu YF, Wang XC, Liang YM, Quan ZJ. Directed Copper-Catalyzed Tandem Radical Cyclization Reaction of Alkyl Bromides and Unactivated Olefins. Org Lett 2022; 24:2738-2743. [PMID: 35357833 DOI: 10.1021/acs.orglett.2c00835] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The free radical cyclization reaction is a promising strategy for ring framework formation. Herein, we report a copper-catalyzed tandem radical cyclization strategy for preparing substituted lactam derivatives. This reaction proceeds through a radical coupling approach, which not only allows a wide range of alkenes but also is quite compatible with the primary, secondary, and tertiary radicals. In addition, density functional theory calculations were performed to gain insights into the reaction mechanism.
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Affiliation(s)
- Ming Li
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yuke Li
- Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin, Hong Kong 999077, China
| | - Wan-Yuan Jia
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Guo-Qing Sun
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Fan Gao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Guo-Xiao Zhao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yi-Feng Qiu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Zheng-Jun Quan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, China
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10
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Yang R, Yi D, Shen K, Fu Q, Wei J, Lu J, Yang L, Wang L, Wei S, Zhang Z. Indole and Pyrrole Derivatives as Pre-photocatalysts and Substrates in the Sulfonyl Radical-Triggered Relay Cyclization Leading to Sulfonylated Heterocycles. Org Lett 2022; 24:2014-2019. [DOI: 10.1021/acs.orglett.2c00472] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Ran Yang
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Dong Yi
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Kunrong Shen
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Qiang Fu
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Jun Wei
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Ji Lu
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Lin Yang
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
| | - Li Wang
- Department of Nuclear Medicine, Affiliated Hospital, Southwest Medical University, Luzhou 646000, China
| | - Siping Wei
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
- State Key Laboratory of Natural and Biomimetic Drugs, Peking University, Beijing 100191, China
| | - Zhijie Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Southwest Medical University, Luzhou 646000, China
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11
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Yang Z, Chen L, Sun Q, Guo M, Wang G, Zhao W, Tang X. Tetrahydroxydiboron and Nickel Chloride Cocatalyzed Rapid Radical Cyclization toward Pyrrolizidine and Indolizidine Alkaloids. J Org Chem 2022; 87:3788-3793. [PMID: 35188782 DOI: 10.1021/acs.joc.1c02874] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
A novel tetrahydroxydiboron and nickel chloride cocatalyzed radical cyclization cascade with a broad substrate scope and an ultrashort reaction time was developed. The mechanistic investigation indicated that the reaction might involve a homocleavage of tetrahydroxydiboron and nickel hydride intermediates. This approach enables the simple and efficient synthesis of a series of heteropolycycles.
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Affiliation(s)
- Zequn Yang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Longhui Chen
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Qi Sun
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Minjie Guo
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Guangwei Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Wentao Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangyang Tang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
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12
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Collett JD, Krause JA, Guan H. Nickel Hydride Complexes Supported by a Pyrrole-Derived Phosphine Ligand. Organometallics 2022. [DOI: 10.1021/acs.organomet.1c00694] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joel D. Collett
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
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13
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Zhang J, Wu M, Ju H, Yang H, Qian B, Ding K, Wu J, Xie M. K2S2O8-mediated acylarylation of unactivated alkenes via acyl radical addition/C–H annulation cascade of N-allyl-indoles with silver cocatalysis. Org Chem Front 2022. [DOI: 10.1039/d1qo01069g] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
A silver-catalyzed, K2S2O8-mediated protocol to access the regioselective acylarylation of unactivated alkenes was reported.
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Affiliation(s)
- Jitan Zhang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Manyi Wu
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Hu Ju
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Haitao Yang
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Baiyang Qian
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Ke Ding
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Jiaping Wu
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
| | - Meihua Xie
- Key Laboratory of Functional Molecular Solids (Ministry of Education), Anhui Key Laboratory of Molecular Based Materials, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, China
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14
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Liu Y, Zhang N, Xu Y, Chen Y. Visible-Light-Induced Radical Cascade Reaction of 1-Allyl-2-ethynylbenzoimidazoles with Thiosulfonates to Assemble Thiosulfonylated Pyrrolo[1,2- a]benzimidazoles. J Org Chem 2021; 86:16882-16891. [PMID: 34739244 DOI: 10.1021/acs.joc.1c02082] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A visible-light-induced radical domino reaction of 1-allyl-2-ethynylbenzoimidazoles with thiosulfonates was developed, which generated the thiosulfonylated pyrrolo[1,2-a]benzimidazoles in moderate to good yields. This reaction proceeded under transition-metal-free conditions with good functional group tolerance and high regioselectivity. The possible pathway involved thiosulfonates were activated through the energy transfer route promoted by photocatalysis.
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Affiliation(s)
- Yan Liu
- Pharmacy School, Guilin Medical University, Guilin, 541004, People's Republic of China
| | - Niuniu Zhang
- Pharmacy School, Guilin Medical University, Guilin, 541004, People's Republic of China
| | - Yanli Xu
- Pharmacy School, Guilin Medical University, Guilin, 541004, People's Republic of China
| | - Yanyan Chen
- Pharmacy School, Guilin Medical University, Guilin, 541004, People's Republic of China
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15
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Cheng J, Zhang H, Lv J, Zheng J. Palladium‐Catalyzed Intermolecular Dicarbofunctionalization of Unactivated Alkenes: Synthesis of Fluoroalkylated Heterocycles with All‐Carbon Quaternary Centers. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101342] [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)
- Jiajia Cheng
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University 2 Xueyuan Road Fuzhou 350116 People's Republic of China
| | - Huali Zhang
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University 2 Xueyuan Road Fuzhou 350116 People's Republic of China
| | - Jinliang Lv
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University 2 Xueyuan Road Fuzhou 350116 People's Republic of China
| | - Jinhua Zheng
- State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University 2 Xueyuan Road Fuzhou 350116 People's Republic of China
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16
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Lin S, Cui J, Chen Y, Li Y. Copper-Catalyzed Direct Cycloaddition of Imidazoles and Alkenes to Trifluoromethylated Tricyclic Imidazoles. J Org Chem 2021; 86:15768-15776. [PMID: 34632765 DOI: 10.1021/acs.joc.1c01832] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We reported herein a copper-catalyzed trifluoromethylarylated cycloaddition of imidazoles and olefins using CF3SO2Cl as the radical source to synthesize highly functionalized tricyclic imidazoles. This procedure exhibits a wide range of substrate scope with 25%-93% isolated yields (36 examples). Mechanistic studies were carried out to support a free trifluoromethyl radical pathway.
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Affiliation(s)
- Shengnan Lin
- Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Jianchao Cui
- Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Yu Chen
- Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - Yi Li
- Key Laboratory of Molecule Synthesis and Function Discovery, College of Chemistry, Fuzhou University, Fuzhou 350108, China
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17
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Zhao Y, Rui J, Du Q, Chen R, Zhan Y, Zheng X, Wu X. Catalytic base-controlled regiodivergent heteronucleophilic hydrofunctionalization of β,γ-unsaturated amides. Chem Commun (Camb) 2021; 57:9756-9759. [PMID: 34477183 DOI: 10.1039/d1cc03440e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A general catalytic base-controlled regiodivergent nucleophilic hydrofunctionalization of both terminal and internal β,γ-unsaturated amides has been reported. The atom-economical addition of various S/P-based nucleophiles was also exclusively chemoselective. More than 60 branched or linear hetero-substituted aliphatic amides were synthesized from common starting materials under transition-metal-free conditions. Preliminary mechanistic studies are consistent with our proposed divergent catalytic cycles.
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Affiliation(s)
- Yao Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Jiacheng Rui
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Qiang Du
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Rizhi Chen
- State Key Laboratory of Materials-Oriented Chemical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Ying Zhan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Xintao Zheng
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
| | - Xiaojin Wu
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, China.
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18
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Peng CC, Wu LJ, Pi SF. Palladium-catalyzed difunctionalization/dearomatization of N-benzylacrylamides with α-carbonyl alkyl bromides: facile access to azaspirocyclohexadienones. Org Biomol Chem 2021; 19:7602-7606. [PMID: 34524329 DOI: 10.1039/d1ob01405f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An efficient palladium-catalyzed difunctionalization/dearomatization of N-benzylacrylamides with α-carbonyl alkyl bromides as alkyl radical precursors has been described. Various α-carbonyl alkyl bromides, including α-bromoalkyl esters and ketones, reacted smoothly to provide important azaspirocyclohexadienones in moderate to excellent yields. In addition, mechanistic studies suggested that the reaction proceeded via a radical pathway.
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Affiliation(s)
- Chuan-Chong Peng
- Institute of Applied Chemistry, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Li-Jun Wu
- Institute of Applied Chemistry, Central South University of Forestry and Technology, Changsha, 410004, China.
| | - Shao-Feng Pi
- School of Materials and Chemical Engineering, Hunan Provincial Key Laboratory of Environmental Catalysis & Waste Recycling, Hunan Institute of Engineering, Xiangtan, 411104, China.
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19
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Lin S, Chen Y, Luo X, Li Y. Sustainable Cascades to Difluoroalkylated Polycyclic Imidazoles. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sheng‐Nan Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan Province School of Chemical Science and Technology Yunnan University Kunming 650091 China
| | - Yu Chen
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University) College of Chemistry Fuzhou University Fuzhou 350108 China
| | - Xiao‐Dong Luo
- Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan Province School of Chemical Science and Technology Yunnan University Kunming 650091 China
| | - Yi Li
- Key Laboratory of Molecule Synthesis and Function Discovery (Fujian Province University) College of Chemistry Fuzhou University Fuzhou 350108 China
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20
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Regioselective 2-alkylation of indoles with α-bromo esters catalyzed by Pd/P,P=O system. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2021.06.091] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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