1
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Han Y, Shi J, Li S, Dan T, Yang W, Yang M. Selective editing of a peptide skeleton via C-N bond formation at N-terminal aliphatic side chains. Chem Sci 2022; 13:14382-14386. [PMID: 36545141 PMCID: PMC9749142 DOI: 10.1039/d2sc04909k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Accepted: 11/04/2022] [Indexed: 11/23/2022] Open
Abstract
The applications of peptides and peptidomimetics have been demonstrated in the fields of therapeutics, diagnostics, and chemical biology. Strategies for the direct late-stage modification of peptides and peptidomimetics are highly desirable in modern drug discovery. Transition-metal-catalyzed C-H functionalization is emerging as a powerful strategy for late-stage peptide modification that is able to construct functional groups or increase skeletal diversity. However, the installation of directing groups is necessary to control the site selectivity. In this work, we describe a transition metal-free strategy for late-stage peptide modification. In this strategy, a linear aliphatic side chain at the peptide N-terminus is cyclized to deliver a proline skeleton via site-selective δ-C(sp3)-H functionalization under visible light. Natural and unnatural amino acids are demonstrated as suitable substrates with the transformations proceeding with excellent regio- and stereo-selectivity.
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Affiliation(s)
- Yujie Han
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE & School of Chemistry and Chemical Engineering Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Junjie Shi
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE & School of Chemistry and Chemical Engineering Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Songrong Li
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE & School of Chemistry and Chemical Engineering Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Tingting Dan
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE & School of Chemistry and Chemical Engineering Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Wenwen Yang
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE & School of Chemistry and Chemical Engineering Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Mingyu Yang
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE & School of Chemistry and Chemical Engineering Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
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2
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Hitt M, Vedernikov AN. Oxidative Trifluoroacetoxylation of 1°, 2°, and 3° Benzylic C(sp 3)-H Bond Donors Using N-Trifluoroacetoxyquinuclidinium Salts under Photoredox Catalysis. Org Lett 2022; 24:7737-7741. [PMID: 36239346 DOI: 10.1021/acs.orglett.2c02946] [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
N-Trifluoroacetoxyquinuclidinium trifluoroacetate was prepared in situ from quinuclidine N-oxide and (CF3CO)2O. Except for some electron-poor substrates, this reagent allows for the high-yielding oxidative trifluoroacetoxylation of 1°, 2°, and 3° benzylic C-H bonds under photocatalytic conditions. The trifluoroacetoxylation of an ibuprofen methyl ester allowed the selective functionalization of a 2° benzylic C-H bond. For alkylbenzenes, hydrogen-atom transfer from a benzylic C-H bond to a quinuclidine cation radical was proposed to be the reaction-product-determining step.
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Affiliation(s)
- Michael Hitt
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
| | - Andrei N Vedernikov
- Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, United States
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3
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Liu X, He K, Pan J, Zeng W, Lin J, Jin Y. Copper-catalyzed cascade reaction of indole and benzimidazole radicals to synthesize 3-haloindole-benzimidazole compounds. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Li QZ, Zeng R, Fan Y, Liu YQ, Qi T, Zhang X, Li JL. Remote C(sp 3 )-H Acylation of Amides and Cascade Cyclization via N-Heterocyclic Carbene Organocatalysis. Angew Chem Int Ed Engl 2022; 61:e202116629. [PMID: 35112461 DOI: 10.1002/anie.202116629] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Indexed: 11/08/2022]
Abstract
The direct functionalization of inert C(sp3 )-H bonds under environmentally benign catalytic conditions remains a challenging task in synthetic chemistry. Here, we report an organocatalytic remote C(sp3 )-H acylation of amides and cascade cyclization through a radical-mediated 1,5-hydrogen atom transfer mechanism using N-heterocyclic carbene as the catalyst. Notably, a diversity of nitrogen-containing substrates, including simple linear aliphatic carbamates and ortho-alkyl benzamides, can be successfully applied to this organocatalytic system. With the established protocol, over 120 examples of functionalized δ-amino ketones and isoquinolinones with diverse substituents were easily synthesized in up to 99 % yield under mild conditions. The robustness and generality of the organocatalytic strategy were further highlighted by the successful acylation of unactivated C(sp3 )-H bonds and late-stage modification of pharmaceutical molecules. Then, the asymmetric control of the radical reaction was attempted and proven feasible by using a newly designed chiral thiazolium catalyst, and moderate enantioselectivity was obtained at the current stage. Preliminary mechanistic investigations including several control reactions, KIE experiments, and computational studies shed light on the organocatalytic radical reaction mechanism.
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Affiliation(s)
- Qing-Zhu Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Rong Zeng
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Yang Fan
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Yan-Qing Liu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China
| | - Ting Qi
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, China.,College of Chemical Engineering, Sichuan University, Chengdu, 610065, China
| | - Xiang Zhang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics, School of Pharmacy, Chengdu University, Chengdu, 610106, 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, 610106, China
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5
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Li Q, Zeng R, Fan Y, Liu Y, Qi T, Zhang X, Li J. Remote C(sp
3
)−H Acylation of Amides and Cascade Cyclization via N‐Heterocyclic Carbene Organocatalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Qing‐Zhu Li
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu 610106 China
| | - Rong Zeng
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu 610106 China
| | - Yang Fan
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu 610106 China
| | - Yan‐Qing Liu
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu 610106 China
| | - Ting Qi
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu 610106 China
- College of Chemical Engineering Sichuan University Chengdu 610065 China
| | - Xiang Zhang
- Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province Sichuan Industrial Institute of Antibiotics, School of Pharmacy Chengdu University Chengdu 610106 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 610106 China
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6
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Zhong LJ, Lv GF, Ouyang XH, Li Y, Li JH. Copper-Catalyzed Fluoroamide-Directed Remote Benzylic C-H Olefination: Facile Access to Internal Alkenes. Org Chem Front 2022. [DOI: 10.1039/d2qo00822j] [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
A general, site-selective copper-catalyzed fluoroamide-directed remote benzylic C-H olefination of N-fluoroamides with terminal alkenes for producing internal alkenes is disclosed. This protocol proceeds via a hybrid Cu-radical mechanism, which synergistically...
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7
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Chen GL, He SH, Cheng L, Liu F. Copper-Catalyzed N-Directed Distal C(sp 3)-H Sulfonylation and Thiolation with Sulfinate Salts. Org Lett 2021; 23:8338-8342. [PMID: 34632768 DOI: 10.1021/acs.orglett.1c03075] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We herein report a selective and catalytic C(sp3)-H functionalization approach to access amines bearing organo-sulfonyl and organo-thiol groups. This reaction proceeds through a cascade process of N-radical formation, alkyl radical formation via 1,5-HAT, and C-S bond formation, thereby offering a series of functionalized amines. This method could enable primary, secondary, and tertiary C(sp3)-H sulfonylation and thiolation and also exhibits good functional group tolerance.
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Affiliation(s)
- Guang-Le Chen
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Shi-Hui He
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Liang Cheng
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Feng Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
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8
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Sinha SK, Guin S, Maiti S, Biswas JP, Porey S, Maiti D. Toolbox for Distal C-H Bond Functionalizations in Organic Molecules. Chem Rev 2021; 122:5682-5841. [PMID: 34662117 DOI: 10.1021/acs.chemrev.1c00220] [Citation(s) in RCA: 166] [Impact Index Per Article: 55.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Transition metal catalyzed C-H activation has developed a contemporary approach to the omnipresent area of retrosynthetic disconnection. Scientific researchers have been tempted to take the help of this methodology to plan their synthetic discourses. This paradigm shift has helped in the development of industrial units as well, making the synthesis of natural products and pharmaceutical drugs step-economical. In the vast zone of C-H bond activation, the functionalization of proximal C-H bonds has gained utmost popularity. Unlike the activation of proximal C-H bonds, the distal C-H functionalization is more strenuous and requires distinctly specialized techniques. In this review, we have compiled various methods adopted to functionalize distal C-H bonds, mechanistic insights within each of these procedures, and the scope of the methodology. With this review, we give a complete overview of the expeditious progress the distal C-H activation has made in the field of synthetic organic chemistry while also highlighting its pitfalls, thus leaving the field open for further synthetic modifications.
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Affiliation(s)
- Soumya Kumar Sinha
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Srimanta Guin
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sudip Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Jyoti Prasad Biswas
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Sandip Porey
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Debabrata Maiti
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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9
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Liu X, He K, Gao N, Jiang P, Lin J, Jin Y. A radical-mediated multicomponent cascade reaction for the synthesis of azide-biindole derivatives. Chem Commun (Camb) 2021; 57:9696-9699. [PMID: 34555141 DOI: 10.1039/d1cc03853b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A radical-mediated, one-pot, multicomponent cascade reaction was developed for the synthesis of azide-biindole derivatives. Mechanistic studies demonstrated that the nitrogen-centred free radical was formed by the reaction of heterocyclic N-H with CuII and PIFA and initiated the cascade reaction with indole to obtain the biindole intermediate. The biindole intermediate then reacted with sodium azide in the presence of CuII catalyst and PIFA to form the final products. This methodology may be useful for constructing other azido heterocycles.
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Affiliation(s)
- Xiaoyu Liu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Kun He
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Na Gao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Peiyun Jiang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Jun Lin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
| | - Yi Jin
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education, Yunnan Provincial Center for Research & Development of Natural Products, School of Chemical Science and Technology, Yunnan University, Kunming, 650091, P. R. China.
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10
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Yu F, Li C, Wang C, Zhang H, Cao ZY. (1-Selenocyanatoethyl)benzene: A Selenocyanation Reagent for Site-Selective Selenocyanation of Inert Alkyl C(sp 3)-H Bonds. Org Lett 2021; 23:7156-7160. [PMID: 34468157 DOI: 10.1021/acs.orglett.1c02564] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
A new, simple, yet easily accessible, (1-selenocyanatoethyl)benzene has been designed and applied as a SeCN group transfer reagent for selenocyanation of aliphatic C(sp3)-H bonds for the first time. This protocol is featured with mild reaction conditions and wide substrate scope. Control experiments reveal that a radical-group transfer mechanism might be involved.
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Affiliation(s)
- Fei Yu
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, China
| | - Chuang Li
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, China
| | - Chuangye Wang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, China
| | - Hongwei Zhang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, China
| | - Zhong-Yan Cao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng, Henan 475004, China
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11
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Nobile E, Castanheiro T, Besset T. Radical-Promoted Distal C-H Functionalization of C(sp 3 ) Centers with Fluorinated Moieties. Angew Chem Int Ed Engl 2021; 60:12170-12191. [PMID: 32897632 DOI: 10.1002/anie.202009995] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/28/2020] [Indexed: 12/12/2022]
Abstract
Due to their unique properties, fluorinated scaffolds are pivotal compounds in pharmaceuticals, agrochemicals, and materials science. Over the last years, the development of versatile strategies for the selective synthesis of fluorinated molecules by direct C-H bond functionalization has attracted a lot of attention. In particular, the design of novel transformations based on a radical process was a bottleneck for distal C-H functionalization reactions, offering synthetic solutions for the selective introduction of fluorinated groups. This Minireview highlights the major contributions in this blossoming field. The development of new methodologies for the remote functionalization of aliphatic derivatives with various fluorinated groups based on a 1,5-hydrogen atom transfer process and a β-fragmentation reaction will be showcased and discussed.
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Affiliation(s)
- Enzo Nobile
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Thomas Castanheiro
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
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12
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Nobile E, Castanheiro T, Besset T. Radical‐Promoted Distal C−H Functionalization of C(sp
3
) Centers with Fluorinated Moieties. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202009995] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Enzo Nobile
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
| | - Thomas Castanheiro
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
| | - Tatiana Besset
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
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13
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Min QQ, Yang JW, Pang MJ, Ao GZ, Liu F. Copper-catalyzed, N-directed remote C(sp3)–H azidation and thiocyanation. Org Chem Front 2021. [DOI: 10.1039/d0qo01012j] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A mild and practical protocol is developed for the synthesis of distal azido and thiocyanato alkylamines via N-directed remote C(sp3)–H functionalization.
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Affiliation(s)
- Qing-Qiang Min
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Jia-Wen Yang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Meng-Juan Pang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Gui-Zhen Ao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
| | - Feng Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry
- College of Pharmaceutical Sciences
- Soochow University
- Suzhou
- People's Republic of China
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14
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Zhu Y, Wang J, Wu D, Yu W. Visible‐Light‐Driven Remote C−H Chlorination of Aliphatic Sulfonamides with Sodium Hypochlorite. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000354] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Yanshuo Zhu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
| | - Juan‐Juan Wang
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
| | - Danhua Wu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
| | - Wei Yu
- State Key Laboratory of Applied Organic Chemistry College of Chemistry and Chemical Engineering Lanzhou University Lanzhou 730000 China
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15
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Min QQ, Yang JW, Pang MJ, Ao GZ, Liu F. Copper-Catalyzed Remote C(sp 3)-H Amination of Carboxamides. Org Lett 2020; 22:2828-2832. [PMID: 32207306 DOI: 10.1021/acs.orglett.0c00829] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Here we report a method for the site-selective intermolecular C(sp3)-H amination of carboxamides by merging transition-metal catalysis and the hydrogen atom transfer strategy. The reaction proceeds through a sequence of favorable single-electron transfer, 1,5-hydrogen atom transfer, and C-N cross-coupling steps, thus allowing access to a series of desired products. This reaction could accommodate a wide diversity of nitrogen nucleophiles as well as demonstrate excellent chemoselectivity and functional group compatibility.
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Affiliation(s)
- Qing-Qiang Min
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Jia-Wen Yang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Meng-Juan Pang
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Gui-Zhen Ao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China
| | - Feng Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China.,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, People's Republic of China
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16
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Kumar G, Pradhan S, Chatterjee I. N‐Centered Radical Directed Remote C−H Bond Functionalization via Hydrogen Atom Transfer. Chem Asian J 2020; 15:651-672. [DOI: 10.1002/asia.201901744] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/16/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Gautam Kumar
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab 140001 India
| | - Suman Pradhan
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab 140001 India
| | - Indranil Chatterjee
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab 140001 India
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17
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Chen AD, Herbort JH, Wappes EA, Nakafuku KM, Mustafa DN, Nagib DA. Radical cascade synthesis of azoles via tandem hydrogen atom transfer. Chem Sci 2020; 11:2479-2486. [PMID: 34084413 PMCID: PMC8157396 DOI: 10.1039/c9sc06239d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 01/24/2020] [Indexed: 12/12/2022] Open
Abstract
A radical cascade strategy for the modular synthesis of five-membered heteroarenes (e.g. oxazoles, imidazoles) from feedstock reagents (e.g. alcohols, amines, nitriles) has been developed. This double C-H oxidation is enabled by in situ generated imidate and acyloxy radicals, which afford regio- and chemo-selective β C-H bis-functionalization. The broad synthetic utility of this tandem hydrogen atom transfer (HAT) approach to access azoles is included, along with experiments and computations that provide insight into the selectivity and mechanism of both HAT events.
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Affiliation(s)
- Andrew D Chen
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - James H Herbort
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Ethan A Wappes
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Kohki M Nakafuku
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Darsheed N Mustafa
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - David A Nagib
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
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18
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Liu C, Jiang Q, Lin Y, Fang Z, Guo K. C- to N-Center Remote Heteroaryl Migration via Electrochemical Initiation of N Radical by Organic Catalyst. Org Lett 2020; 22:795-799. [PMID: 31922422 DOI: 10.1021/acs.orglett.9b04141] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Herein an exogenous oxidant- and metal-free electrochemical heteroaryl migration triggered by N radicals to construct new N-C bonds was developed. This methodology features a high atom economy and utilization rate of energy, and it is insensitive to water and air. Moreover, a user-friendly undivided cell was employed. The use of an organic catalyst makes it more efficient, green, and practical.
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Affiliation(s)
- Chengkou Liu
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Qiang Jiang
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Yang Lin
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering , Nanjing Tech University , Nanjing 211816 , China.,State Key Laboratory of Materials-Oriented Chemical Engineering , Nanjing Tech University , Nanjing 211816 , China
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19
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Liu C, Cai C, Yuan C, Jiang Q, Fang Z, Guo K. Visible-light-promoted N-centered radical generation for remote heteroaryl migration. Org Biomol Chem 2020; 18:7663-7670. [DOI: 10.1039/d0ob01594f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient visible-light-mediated organocatalyzed N–H heteroarylation was accomplished via remote heteroaryl ipso-migration.
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Affiliation(s)
- Chengkou Liu
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Chen Cai
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Chengcheng Yuan
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Qiang Jiang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Zheng Fang
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
| | - Kai Guo
- College of Biotechnology and Pharmaceutical Engineering
- Nanjing Tech University
- Nanjing 211816
- China
- State Key Laboratory of Materials-Oriented Chemical Engineering
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20
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Qin Y, Han Y, Tang Y, Wei J, Yang M. A general method for site-selective Csp 3-S bond formation via cooperative catalysis. Chem Sci 2019; 11:1276-1282. [PMID: 34123252 PMCID: PMC8148391 DOI: 10.1039/c9sc04169a] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Herein, we report a copper-catalysed site-selective thiolation of Csp3-H bonds of aliphatic amines. The method features a broad substrate scope and good functional group compatibility. Primary, secondary, and tertiary C-H bonds can be converted into C-S bonds with a high efficiency. The late-stage modification of biologically active compounds by this method was also demonstrated. Furthermore, the one-pot preparation of pyrrolidine or piperidine compounds via a domino process was achieved.
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Affiliation(s)
- Yuman Qin
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Yujie Han
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Yongzhen Tang
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Junfa Wei
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
| | - Mingyu Yang
- Key Laboratory of Applied Surface and Colloid Chemistry of MOE, School of Chemistry and Chemical Engineering, Shaanxi Normal University 620 West Chang'an Ave Xi'an 710119 China
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21
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Kim N, Lee C, Kim T, Hong S. Visible-Light-Induced Remote C(sp 3)-H Pyridylation of Sulfonamides and Carboxamides. Org Lett 2019; 21:9719-9723. [PMID: 31736318 DOI: 10.1021/acs.orglett.9b03879] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Visible-light-induced site-selective C(sp3)-H pyridylation of amides has been accomplished using N-amidopyridinium salts. The N-centered radicals generated by the single-electron reduction of N-amidopyridinium substrates undergo 1,5-hydrogen atom transfer to form alkyl radical intermediates. Excellent C4-selectivity in radical trapping with pyridinium salts is observed for the alkyl radicals to provide δ-pyridyl sulfonamides and γ-pyridyl carboxamides. The utility is demonstrated by offering a practical approach for the late-stage functionalization of complex amide derivatives.
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Affiliation(s)
- Namhoon Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Changseok Lee
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Taehwan Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Sungwoo Hong
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
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22
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Tang N, Wu X, Zhu C. Practical, metal-free remote heteroarylation of amides via unactivated C(sp 3)-H bond functionalization. Chem Sci 2019; 10:6915-6919. [PMID: 31391914 PMCID: PMC6640195 DOI: 10.1039/c9sc02564b] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 06/10/2019] [Indexed: 11/21/2022] Open
Abstract
Development of practical methods for the production of multi-functionalized amides is one of the most important topics in both synthetic chemistry and drug discovery. Disclosed herein is a new, efficient, site-selective heteroarylation of amides via C(sp3)-H bond functionalization. Amidyl radicals are directly generated from the amide N-H bonds under mild conditions, which trigger the subsequent 1,5-HAT process. A wide scope of aliphatic amides including carboxamides, sulfonamides, and phosphoramides are readily modified at remote C(sp3)-H bonds by installing diverse heteroaryl groups. Borne out of pragmatic consideration, this protocol can be used for the late-stage functionalization of amides.
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Affiliation(s)
- Nana Tang
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry , Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road , Suzhou , Jiangsu 215123 , China .
| | - Xinxin Wu
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry , Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road , Suzhou , Jiangsu 215123 , China .
| | - Chen Zhu
- Key Laboratory of Organic Synthesis of Jiangsu Province , College of Chemistry , Chemical Engineering and Materials Science , Soochow University , 199 Ren-Ai Road , Suzhou , Jiangsu 215123 , China .
- Key Laboratory of Synthesis Chemistry of Natural Substances , Shanghai Institute of Organic Chemistry , Chinese Academy of Science , 345 Lingling Road , Shanghai 200032 , China
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23
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Bafaluy D, Muñoz‐Molina JM, Funes‐Ardoiz I, Herold S, de Aguirre AJ, Zhang H, Maseras F, Belderrain TR, Pérez PJ, Muñiz K. Copper‐Catalyzed N−F Bond Activation for Uniform Intramolecular C−H Amination Yielding Pyrrolidines and Piperidines. Angew Chem Int Ed Engl 2019; 58:8912-8916. [DOI: 10.1002/anie.201902716] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/16/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel Bafaluy
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - José María Muñoz‐Molina
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSICCIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spain
| | - Ignacio Funes‐Ardoiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Sebastian Herold
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Adiran J. de Aguirre
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Hongwei Zhang
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
- Departament de QuímicaUniversitat Autònoma de Barcelona 08193 Bellaterra Spain
| | - Tomás R. Belderrain
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSICCIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spain
| | - Pedro J. Pérez
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSICCIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spain
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
- ICREA 08010 Barcelona Spain
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24
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Bafaluy D, Muñoz‐Molina JM, Funes‐Ardoiz I, Herold S, de Aguirre A, Zhang H, Maseras F, Belderrain TR, Pérez PJ, Muñiz K. Eine Kupfer‐katalysierte N‐F‐Bindungsaktivierung für die einheitliche intramolekulare C‐H‐Aminierung zu Pyrrolidinen und Piperidinen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902716] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Daniel Bafaluy
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - José Maria Muñoz‐Molina
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spanien
| | - Ignacio Funes‐Ardoiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Sebastian Herold
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Adiran de Aguirre
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Hongwei Zhang
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
- Departament de QuímicaUniversitat Autònoma de Barcelona 08193 Bellaterra Spanien
| | - Tomás R. Belderrain
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spanien
| | - Pedro J. Pérez
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spanien
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
- ICREA 08010 Barcelona Spanien
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25
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Zhang H, Zhou Y, Tian P, Jiang C. Copper-Catalyzed Amide Radical-Directed Cyanation of Unactivated Csp3–H Bonds. Org Lett 2019; 21:1921-1925. [DOI: 10.1021/acs.orglett.9b00553] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hongwei Zhang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, P. R. China
| | - Yulu Zhou
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, P. R. China
| | - Peiyuan Tian
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, P. R. China
| | - Cuiyu Jiang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, P. R. China
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26
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1415] [Impact Index Per Article: 235.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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27
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Zhang Z, Stateman LM, Nagib DA. δ C-H (hetero)arylation via Cu-catalyzed radical relay. Chem Sci 2018; 10:1207-1211. [PMID: 30774920 PMCID: PMC6349054 DOI: 10.1039/c8sc04366c] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 11/09/2018] [Indexed: 12/23/2022] Open
Abstract
A radical relay strategy has been developed to enable selective δ C–H arylation. The approach employs a chiral copper catalyst, which serves the dual roles of generating an N-centered radical to promote intramolecular H-atom transfer, and then intercepting a distal C-centered radical for C–C bond formation with (hetero)aryl boronic acids.
A Cu-catalyzed strategy has been developed that harnesses a radical relay mechanism to intercept a distal C-centered radical for C–C bond formation. This approach enables selective δ C–H (hetero)arylation of sulfonamides via intramolecular hydrogen atom transfer (HAT) by an N-centered radical. The radical relay is both initiated and terminated by a Cu catalyst, which enables incorporation of arenes and heteroarenes by cross-coupling with boronic acids. The broad scope and utility of this catalytic method for δ C–H arylation is shown, along with mechanistic probes for selectivity of the HAT mechanism. A catalytic, asymmetric variant is also presented, as well as a method for accessing 1,1-diaryl-pyrrolidines via iterative δ C–H functionalizations.
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Affiliation(s)
- Zuxiao Zhang
- The Ohio State University , Department of Chemistry and Biochemistry , Columbus , OH 43210 , USA .
| | - Leah M Stateman
- The Ohio State University , Department of Chemistry and Biochemistry , Columbus , OH 43210 , USA .
| | - David A Nagib
- The Ohio State University , Department of Chemistry and Biochemistry , Columbus , OH 43210 , USA .
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