1
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Wen L, Tan Q, Pi C, Yuan J, Zhang J, Mi X. Visible-light-mediated C-H amidation of imidazoheterocycles with N-amidopyridiniums. Org Biomol Chem 2024; 22:4647-4650. [PMID: 38787700 DOI: 10.1039/d4ob00461b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2024]
Abstract
C-3 amidated imidazoheterocycles were synthesized via a visible light-promoted reaction of imidazoheterocycles with N-amidopyridinium salts catalyzed by 4CzIPN under mild conditions. For imidazoheterocycles and N-amidopyridinium salts with various substituents, the reaction proceeded smoothly to give the corresponding products in moderate to good yields. The reaction provides a new strategy for the synthesis of secondary amides with the imidazo[1,2-a]pyridine core.
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Affiliation(s)
- Lili Wen
- College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
| | - Qiannan Tan
- College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
| | - Chao Pi
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Green Catalysis Center, and College of Chemistry, Zhengzhou University, Zhengzhou 450052, China.
| | - Juan Yuan
- College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
| | - Jingyu Zhang
- College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
| | - Xia Mi
- College of Pharmacy, Henan University of Chinese Medicine, Zhengzhou 450046, China.
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2
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Tali JA, Kumar G, Sharma BK, Rasool Y, Sharma Y, Shankar R. Synthesis and site selective C-H functionalization of imidazo-[1,2- a]pyridines. Org Biomol Chem 2023; 21:7267-7289. [PMID: 37655687 DOI: 10.1039/d3ob00849e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Imidazo[1,2-a]pyridine has attracted much interest in drug development because of its potent medicinal properties, therefore the discovery of novel methods for its synthesis and functionalization continues to be an exciting area of research. Although transition metal catalysis has fuelled the most significant developments, extremely beneficial metal-free approaches have also been identified. Even though pertinent reviews focused on imidazo[1,2-a]pyridine synthesis, properties (physicochemical and medicinal), and functionalization at the C3 position have been published, none of these reviews has focused on the outcomes obtained in the field of global ring functionalization. We wish here to describe a brief synthesis and an overview of all the functionalization reactions at each carbon atom, viz, C2, C3, C5, C6, C7 and C8 of this scaffold, divided into sections based on site-selectivity and the type of functionalization methods used.
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Affiliation(s)
- Javeed Ahmad Tali
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Gulshan Kumar
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Bhupesh Kumar Sharma
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Younis Rasool
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Yashika Sharma
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
| | - Ravi Shankar
- Natural Product and Medicinal Chemistry Division (NPMC), CSIR-Indian Institute of Integrative Medicine, Jammu-180001, India.
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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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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4
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Murray PD, Cox JH, Chiappini ND, Roos CB, McLoughlin EA, Hejna BG, Nguyen ST, Ripberger HH, Ganley JM, Tsui E, Shin NY, Koronkiewicz B, Qiu G, Knowles RR. Photochemical and Electrochemical Applications of Proton-Coupled Electron Transfer in Organic Synthesis. Chem Rev 2022; 122:2017-2291. [PMID: 34813277 PMCID: PMC8796287 DOI: 10.1021/acs.chemrev.1c00374] [Citation(s) in RCA: 154] [Impact Index Per Article: 77.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Indexed: 12/16/2022]
Abstract
We present here a review of the photochemical and electrochemical applications of multi-site proton-coupled electron transfer (MS-PCET) in organic synthesis. MS-PCETs are redox mechanisms in which both an electron and a proton are exchanged together, often in a concerted elementary step. As such, MS-PCET can function as a non-classical mechanism for homolytic bond activation, providing opportunities to generate synthetically useful free radical intermediates directly from a wide variety of common organic functional groups. We present an introduction to MS-PCET and a practitioner's guide to reaction design, with an emphasis on the unique energetic and selectivity features that are characteristic of this reaction class. We then present chapters on oxidative N-H, O-H, S-H, and C-H bond homolysis methods, for the generation of the corresponding neutral radical species. Then, chapters for reductive PCET activations involving carbonyl, imine, other X═Y π-systems, and heteroarenes, where neutral ketyl, α-amino, and heteroarene-derived radicals can be generated. Finally, we present chapters on the applications of MS-PCET in asymmetric catalysis and in materials and device applications. Within each chapter, we subdivide by the functional group undergoing homolysis, and thereafter by the type of transformation being promoted. Methods published prior to the end of December 2020 are presented.
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Affiliation(s)
- Philip
R. D. Murray
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - James H. Cox
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Nicholas D. Chiappini
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Casey B. Roos
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | | | - Benjamin G. Hejna
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Suong T. Nguyen
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Hunter H. Ripberger
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Jacob M. Ganley
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Elaine Tsui
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Nick Y. Shin
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Brian Koronkiewicz
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Guanqi Qiu
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
| | - Robert R. Knowles
- Department of Chemistry, Princeton
University, Princeton, New Jersey 08544, United States
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5
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Yang Z, Cao K, Peng X, Lin L, Fan D, Li J, Wang J, Zhang X, Jiang H, Li J. Micellar Catalysis: Visible‐Light Mediated Imidazo[1,2‐
a
]pyridine C—H Amination with
N
‐Aminopyridinium Salt Accelerated by Surfactant in Water. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202100489] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhonglie Yang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
| | - Kun Cao
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
| | - Xiaoyan Peng
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
| | - Li Lin
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
| | - Danchen Fan
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
| | - Jun‐Long Li
- Antibiotics Research and Re‐evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu Sichuan 610106 China
| | - Jingxia Wang
- Irradiation Preservation Technology Key Laboratory of Sichuan Province Sichuan Institute of Atomic Energy Chengdu Sichuan 610101 China
| | - Xiaobin Zhang
- Irradiation Preservation Technology Key Laboratory of Sichuan Province Sichuan Institute of Atomic Energy Chengdu Sichuan 610101 China
| | - Hezhong Jiang
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
| | - Jiahong Li
- Sichuan Engineering Research Center for Biomimetic Synthesis of Natural Drugs, School of Life Science and Engineering Southwest Jiaotong University Chengdu Sichuan 610041 China
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6
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Kalari S, Balasubramanian S, Rode HB. Difluorinative-hydroxylation and C-3 functionalization (halogenation/SCN/NO) of imidazopyridine using Selectfluor as fluorine source or oxidant respectively. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153028] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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7
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Ma CH, Chen M, Feng ZW, Zhang Y, Wang J, Jiang YQ, Yu B. Functionalization of imidazo[1,2-a]pyridines via radical reactions. NEW J CHEM 2021. [DOI: 10.1039/d1nj00704a] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The recent advances in radical reactions for the direct functionalization of imidazo[1,2-a]pyridines are reviewed.
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Affiliation(s)
- Chun-Hua Ma
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Ming Chen
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Zhi-Wen Feng
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Yan Zhang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Jin Wang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Yu-Qin Jiang
- Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- Henan Engineering Research Centre of Chiral Hydroxyl Pharmaceutical
- Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical Materials
| | - Bing Yu
- Green Catalysis Centre
- College of Chemistry
- Zhengzhou University
- Zhengzhou 450001
- China
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8
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Liu X, Li W, Liu H, Cao H. Application on the Construction of Imidazo[1,2- a]pyridines C-3 Canbon-Hetero Bonds by Visible-Light Catalysis and Electrochemistry. CHINESE J ORG CHEM 2021. [DOI: 10.6023/cjoc202012026] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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9
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Patel OPS, Nandwana NK, Legoabe LJ, Das BC, Kumar A. Recent Advances in Radical C−H Bond Functionalization of Imidazoheterocycles. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000633] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Om P. S. Patel
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Nitesh K. Nandwana
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Lesetja J. Legoabe
- Centre of Excellence for Pharmaceutical Sciences North-West University Private Bag X6001 Potchefstroom 2520 South Africa
| | - Bhaskar C. Das
- Departments of Medicine and Pharmacological Sciences Icahn School of Medicine at Mount Sinai New York, NY 10029 USA
| | - Anil Kumar
- Department of Chemistry Birla Institute of Technology and Science Pilani Pilani Campus 333031 Rajasthan India
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10
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Tashrifi Z, Mohammadi-Khanaposhtani M, Larijani B, Mahdavi M. C3-Functionalization of Imidazo[1,2-a
]pyridines. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901491] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Zahra Tashrifi
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| | | | - Bagher Larijani
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
| | - Mohammad Mahdavi
- Endocrinology and Metabolism Research Center; Endocrinology and Metabolism Clinical Sciences Institute; Tehran University of Medical Sciences; Tehran I.R. Iran
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11
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Jin S, Yao H, Lin S, You X, Yang Y, Yan Z. Peroxide-mediated site-specific C–H methylation of imidazo[1,2-a]pyridines and quinoxalin-2(1H)-ones under metal-free conditions. Org Biomol Chem 2020; 18:205-210. [DOI: 10.1039/c9ob02328c] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
An effective approach to realize the direct methylation of imidazo[1,2-a]pyridines and quinoxalin-2(1H)-ones with peroxides under metal-free conditions is described.
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Affiliation(s)
- Shengzhou Jin
- Department of Chemistry
- Nanchang University
- Nanchang
- P. R. China
| | - Hua Yao
- Department of Chemistry
- Nanchang University
- Nanchang
- P. R. China
| | - Sen Lin
- Department of Chemistry
- Nanchang University
- Nanchang
- P. R. China
| | - Xiaoqing You
- Department of Chemistry
- Nanchang University
- Nanchang
- P. R. China
| | - Yao Yang
- Department of Chemistry
- Nanchang University
- Nanchang
- P. R. China
| | - Zhaohua Yan
- Department of Chemistry
- Nanchang University
- Nanchang
- P. R. China
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12
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PhI(OAc)2-mediated oxidative C H sulfoximination of imidazopyridines under mild conditions. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2019.151362] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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13
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Bagdi AK, Hajra A. Visible light promoted C–H functionalization of imidazoheterocycles. Org Biomol Chem 2020; 18:2611-2631. [DOI: 10.1039/d0ob00246a] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The present review summarizes the visible light mediated direct C–H functionalizations of pharmacologically active imidazo[1,2-a]pyridines and other related heterocycles.
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Affiliation(s)
| | - Alakananda Hajra
- Department of Chemistry
- Visva-Bharati (A Central University)
- Santiniketan 731235
- India
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14
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Zhao XM, Huang EL, Zhu YS, Li J, Song B, Zhu X, Hao XQ. Oxidative sulfonamidomethylation of imidazopyridines utilizing methanol as the main C1 source. Org Biomol Chem 2019; 17:4869-4878. [PMID: 31041985 DOI: 10.1039/c9ob00596j] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
An efficient one pot, three component synthesis of C3 sulfonamidomethylated imidazopyridines has been disclosed under metal-free conditions, which utilized the commercially available and renewable reagent methanol as the main methylene source. A wide range of substituted imidazopyridines and sulfamides/amines were well tolerated to afford the corresponding products in up to 92% yield. In the isotopic labelling experiment, it was found that a minor part of the methylene also originated from DTBP. Moreover, the radical scavenger reactions were conducted, which suggested that a free-radical mechanism was probably not involved. The current methodology featured several advantages, including broad substrate scope, good functional group tolerance and high reaction efficiency.
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Affiliation(s)
- Xue-Mei Zhao
- College of Chemistry and Molecular Engineering, School of Life Sciences, Zhengzhou University, Zhengzhou 450001, People's Republic of China.
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15
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Samanta S, Mondal S, Ghosh D, Hajra A. Rhodium-Catalyzed Directed C–H Amidation of Imidazoheterocycles with Dioxazolones. Org Lett 2019; 21:4905-4909. [DOI: 10.1021/acs.orglett.9b01832] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Sadhanendu Samanta
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Susmita Mondal
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Debashis Ghosh
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
| | - Alakananda Hajra
- Department of Chemistry, Visva-Bharati (A Central University), Santiniketan 731235, India
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16
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Jin S, Xie B, Lin S, Min C, Deng R, Yan Z. Metal-Free Site-Specific Hydroxyalkylation of Imidazo[1,2-a]pyridines with Alcohols through Radical Reaction. Org Lett 2019; 21:3436-3440. [DOI: 10.1021/acs.orglett.9b01212] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Shengzhou Jin
- College of Chemistry, Nanchang University, Nanchang 330031, P.R. China
| | - Bo Xie
- College of Chemistry, Nanchang University, Nanchang 330031, P.R. China
| | - Sen Lin
- College of Chemistry, Nanchang University, Nanchang 330031, P.R. China
| | - Cong Min
- College of Chemistry, Nanchang University, Nanchang 330031, P.R. China
| | - Ruihong Deng
- College of Chemistry, Nanchang University, Nanchang 330031, P.R. China
| | - Zhaohua Yan
- College of Chemistry, Nanchang University, Nanchang 330031, P.R. China
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17
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Liu K, Wu J, Deng Y, Song C, Song W, Lei A. Electrochemical C−H/N−H Oxidative Cross Coupling of Imidazopyridines with Diarylamines to Synthesize Triarylamine Derivatives. ChemElectroChem 2019. [DOI: 10.1002/celc.201900138] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Kun Liu
- College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan University Wuhan 430072 Hubei P. R. China
| | - Jiarong Wu
- College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan University Wuhan 430072 Hubei P. R. China
| | - Yuqi Deng
- College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan University Wuhan 430072 Hubei P. R. China
| | - Chunlan Song
- College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan University Wuhan 430072 Hubei P. R. China
| | - Wenxu Song
- College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan University Wuhan 430072 Hubei P. R. China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences Institute for Advanced Studies (IAS)Wuhan University Wuhan 430072 Hubei P. R. China
- National Research Center for Carbohydrate SynthesisJiangxi Normal University Nanchang 330022 Peoples Republic of China
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18
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Singsardar M, Mondal S, Sarkar R, Hajra A. (Diacetoxy)iodobenzene-Mediated Regioselective Imidation of Imidazoheterocycles with N-Fluorobenzenesulfonimide. ACS OMEGA 2018; 3:12505-12512. [PMID: 31457983 PMCID: PMC6645145 DOI: 10.1021/acsomega.8b02088] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Accepted: 09/25/2018] [Indexed: 06/10/2023]
Abstract
Metal-free (diacetoxy)iodobenzene-mediated regioselective imidation of imidazoheterocycles using commercially available N-fluorobenzenesulfonimide as an imidating reagent has been developed. This protocol exhibits broad substrate scope with good to excellent yields of the imidated imidazopyridines under mild conditions in short reaction times. The present protocol also represents an efficient way to access the imidated derivatives of imidazo[2,1-b]thiazole, benzo[d]imidazo-[2,1-b]thiazole, indoles, and indolizines. A radical mechanistic pathway has been proposed for the present protocol.
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19
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Lu S, Tian LL, Cui TW, Zhu YS, Zhu X, Hao XQ, Song MP. Copper-Mediated C–H Amination of Imidazopyridines with N-Fluorobenzenesulfonimide. J Org Chem 2018; 83:13991-14000. [DOI: 10.1021/acs.joc.8b02348] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Shuai Lu
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Lu-Lu Tian
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Tian-Wei Cui
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Yu-Shen Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xinju Zhu
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Xin-Qi Hao
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
| | - Mao-Ping Song
- College of Chemistry and Molecular Engineering, Zhengzhou University, No. 100 Science Road, Zhengzhou, Henan 450001, P. R. China
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20
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Sun K, Mu S, Liu Z, Feng R, Li Y, Pang K, Zhang B. Copper-catalyzed C–N bond formation with imidazo[1,2-a]pyridines. Org Biomol Chem 2018; 16:6655-6658. [DOI: 10.1039/c8ob01853g] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient Cu-catalyzed C–N bond formation with imidazo[1,2-a]pyridines on the C-3 position via a radical pathway is reported.
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Affiliation(s)
- Kai Sun
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang 455000
- P. R. China
| | - Shiqiang Mu
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang 455000
- P. R. China
| | - Zhenhua Liu
- College of Chemistry
- Chemical Engineering and Materials Science Key Laboratory of Molecular and Nano Probes
- Ministry of Education
- Shandong Normal University
- Jinan
| | - Ranran Feng
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang 455000
- P. R. China
| | - Yali Li
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang 455000
- P. R. China
| | - Kui Pang
- College of Chemistry and Chemical Engineering
- Anyang Normal University
- Anyang 455000
- P. R. China
| | - Bing Zhang
- College of chemistry and energy
- Zhengzhou University
- Zhengzhou 450001
- P. R. China
| |
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