1
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Du C, Zhang Y, Li T, Zha Z, Wang Z. Electrochemical dual oxidative C(sp 3)-H amination: switchable synthesis of imidazo-fused quinazolinones. Chem Commun (Camb) 2024; 60:5274-5277. [PMID: 38591991 DOI: 10.1039/d4cc00994k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/10/2024]
Abstract
An efficient electrochemical dual C(sp3)-H amination was developed under metal-free and chemical oxidant-free conditions. A series of imidazo[1,5-a]quinazolin-5(4H)-ones and 5-oxo-4,5-dihydroimidazo[1,5-a]quinazoline-3-carbonitriles can be obtained in high yields and the product distribution can be modulated by virtue of this method. The reaction mechanism was investigated and the corresponding intermediates were studied. The reaction features a broad substrate scope, regulation of the product distribution, mild conditions and scalable preparation.
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Affiliation(s)
- Chengbin Du
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Yan Zhang
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Tong Li
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale, Key Laboratory of Precision and Intelligent Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
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2
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Ding X, Chen J, Ye G. Supramolecular polynuclear clusters sustained cubic hydrogen bonded frameworks with octahedral cages for reversible photochromism. Nat Commun 2024; 15:2782. [PMID: 38555300 PMCID: PMC10981757 DOI: 10.1038/s41467-024-47058-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2023] [Accepted: 03/18/2024] [Indexed: 04/02/2024] Open
Abstract
Developing supramolecular porous crystalline frameworks with tailor-made architectures from advanced secondary building units (SBUs) remains a pivotal challenge in reticular chemistry. Particularly for hydrogen-bonded organic frameworks (HOFs), construction of geometrical cavities through secondary units has been rarely achieved. Herein, a body-centered cubic HOF (TCA_NH4) with octahedral cages was constructed by a C3-symmetric building block and NH4+ node-assembled cluster (NH4)4(COOH)8(H2O)2 that served as supramolecular secondary building units (SSBUs), akin to the polynuclear SBUs in reticular chemistry. Specifically, the octahedral cages could encapsulate four homogenous haloforms including CHCl3, CHBr3, and CHI3 with truncated octahedron configuration. Crystallographic evidence revealed the cages served as spatially-confined nanoreactors, enabling fast, broadband photochromic effect associated with the reversible photo/thermal transformation between encapsulated CHI3 and I2. Overall, this work provides a strategy by shaping SSBUs to expand the framework topology of HOFs and a prototype of hydrogen-bonded nanoreactors to accommodate reversible photochromic reactions.
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Affiliation(s)
- Xiaojun Ding
- Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China.
| | - Jing Chen
- Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China
| | - Gang Ye
- Collaborative Innovation Center of Advanced Nuclear Energy Technology, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, China.
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3
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Akulov AA, Varaksin MV, Nelyubina AA, Tsmokaluk AN, Mazhukin DG, Tikhonov AY, Charushin VN, Chupakhin ON. Iodine-Catalyzed Radical C-H Amination of Nonaromatic Imidazole Oxides: Access to Cyclic α-Aminonitrones. J Org Chem 2024; 89:463-473. [PMID: 38092669 DOI: 10.1021/acs.joc.3c02230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
A straightforward cross-dehydrogenative coupling approach to incorporate alicyclic amino residues into the structure of model cyclic aldonitrones, 2H-imidazole oxides, is reported. The elaborated C(sp2)-H functionalization is achieved by employing cyclic amines in the presence of the I2-tert-butyl hydroperoxide (TBHP) reagent system. As a result, a series of 19 novel heterocyclic derivatives were obtained in yields of up to 97%. A mechanistic study involving electron paramagnetic resonance spectroscopic experiments allowed the radical nature of the reaction to be confirmed. In particular, the envisioned mechanistic rationale comprises N-iodination of a cyclic amine, followed by N-I bond homolysis of the resulting intermediate and subsequent amination of the nitrone moiety via the newly generated nitrogen-centered radical.
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Affiliation(s)
- Alexey A Akulov
- Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation
| | - Mikhail V Varaksin
- Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation
- I.Ya. Postovsky Institute of Organic Synthesis, 22 S. Kovaleskoy Street, Ekaterinburg 620991, Russian Federation
| | - Anna A Nelyubina
- Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation
| | - Anton N Tsmokaluk
- Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation
| | - Dmitrii G Mazhukin
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, 9 Akademika Lavrentieva Avenue, Novosibirsk 630090, Russian Federation
| | - Alexsei Y Tikhonov
- N.N. Vorozhtsov Novosibirsk Institute of Organic Chemistry, 9 Akademika Lavrentieva Avenue, Novosibirsk 630090, Russian Federation
| | - Valery N Charushin
- Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation
- I.Ya. Postovsky Institute of Organic Synthesis, 22 S. Kovaleskoy Street, Ekaterinburg 620991, Russian Federation
| | - Oleg N Chupakhin
- Ural Federal University, 19 Mira Street, Ekaterinburg 620002, Russian Federation
- I.Ya. Postovsky Institute of Organic Synthesis, 22 S. Kovaleskoy Street, Ekaterinburg 620991, Russian Federation
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4
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Rizzo C, Pace A, Pibiri I, Buscemi S, Palumbo Piccionello A. From Conventional to Sustainable Catalytic Approaches for Heterocycles Synthesis. CHEMSUSCHEM 2023:e202301604. [PMID: 38140917 DOI: 10.1002/cssc.202301604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Revised: 12/19/2023] [Accepted: 12/22/2023] [Indexed: 12/24/2023]
Abstract
Synthesis of heterocyclic compounds is fundamental for all the research area in chemistry, from drug synthesis to material science. In this framework, catalysed synthetic methods are of great interest to effective reach such important building blocks. In this review, we will report on some selected examples from the last five years, of the major improvement in the field, focusing on the most important conventional catalytic systems, such as transition metals, organocatalysts, to more sustainable ones such as photocatalysts, iodine-catalysed reaction, electrochemical reactions and green innovative methods.
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Affiliation(s)
- Carla Rizzo
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Andrea Pace
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Ivana Pibiri
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Silvestre Buscemi
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
| | - Antonio Palumbo Piccionello
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies, Italy, University of Palermo, Viale delle Scienze, Ed. 17, 90128, Palermo
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5
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Chen SJ, Krska SW, Stahl SS. Copper-Catalyzed Benzylic C-H Cross-Coupling Enabled by Redox Buffers: Expanding Synthetic Access to Three-Dimensional Chemical Space. Acc Chem Res 2023; 56:3604-3615. [PMID: 38051914 PMCID: PMC10902864 DOI: 10.1021/acs.accounts.3c00580] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
ConspectusCross-coupling methods are the most widely used synthetic methods in medicinal chemistry. Existing reactions are dominated by methods such as amide coupling and arylation reactions that form bonds to sp2-hybridized carbon atoms and contribute to the formation of "flat" molecules. Evidence that three-dimensional structures often have improved physicochemical properties for pharmaceutical applications has contributed to growing demand for cross-coupling methods with sp3-hybridized reaction partners. Substituents attached to sp3 carbon atoms are intrinsically displayed in three dimensions. These considerations have led to efforts to establish reactions with sp3 cross-coupling partners, including alkyl halides, amines, alcohols, and carboxylic acids. As C(sp3)-H bonds are much more abundant that these more conventional coupling partners, we have been pursuing C(sp3)-H cross-coupling reactions that achieve site-selectivity, synthetic utility, and scope competitive with conventional coupling reactions.In this Account, we outline Cu-catalyzed oxidative cross-coupling reactions of benzylic C(sp3)-H bonds with diverse nucleophilic partners. These reactions commonly use N-fluorobenzenesulfonimide (NFSI) as the oxidant. The scope of reactivity is greatly improved by using a "redox buffer" that ensures that the Cu catalyst is available in the proper redox state to promote the reaction. Early precedents of catalytic Cu/NFSI oxidative coupling reactions, including C-H cyanation and arylation, did not require a redox buffer, but reactions with other nucleophiles, such as alcohols and azoles, were much less effective under similar conditions. Mechanistic studies show that some nucleophiles, such as cyanide and arylboronic acids, promote in situ reduction of CuII to CuI, contributing to successful catalytic turnover. Poor reactivity was observed with nucleophiles, such as alcohols, that do not promote CuII reduction in the same manner. This insight led to the identification of sacrificial reductants, termed "redox buffers", that support controlled generation of CuI during the reactions and enable successful benzylic C(sp3)-H cross-coupling with diverse nucleophiles. Successful reactions include those that feature direct coupling of (hetero)benzylic C-H substrates with coupling partners (alcohols, azoles) and sequential C(sp3)-H functionalization/coupling reactions. The latter methods feature generation of a synthetic linchpin that can undergo subsequent reaction with a broad array of nucleophiles. For example, halogenation/substitution cascades afford benzylic amines, (thio)ethers, and heterodiarylmethane derivatives, and an isocyanation/amine-addition sequence generates diverse benzylic ureas.Collectively, these Cu-catalyzed (hetero)benzylic C(sp3)-H cross-coupling reactions rapidly access diverse molecules. Analysis of their physicochemical and topological properties highlights the "drug-likeness" and enhanced three-dimensionality of these products relative to existing bioactive molecules. This consideration, together with the high benzylic C-H site-selectivity and the broad scope of reactivity enabled by the redox buffering strategy, makes these C(sp3)-H cross-coupling methods ideally suited for implementation in high-throughput experimentation platforms to explore novel chemical space for drug discovery and related applications.
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Affiliation(s)
- Si-Jie Chen
- Department of Chemistry, University of Wisconsin - Madison, 1101 University Ave, Madison, Wisconsin, 53706, United States
- Department of Discovery Chemistry, Merck & Co., Inc., 213 E Grand Avenue, South San Francisco, California, 94030, United States
| | - Shane W. Krska
- Department of Discovery Chemistry, Merck & Co., Inc., 126 East Lincoln Ave., Rahway, New Jersey 07065, United States
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin - Madison, 1101 University Ave, Madison, Wisconsin, 53706, United States
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6
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He J, Du FH, Zhang C, Du Y. Chemoselective cycloisomerization of O-alkenylbenzamides via concomitant 1,2-aryl migration/elimination mediated by hypervalent iodine reagents. Commun Chem 2023; 6:126. [PMID: 37330613 DOI: 10.1038/s42004-023-00930-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 06/12/2023] [Indexed: 06/19/2023] Open
Abstract
As an ambident nucleophile, controlling the reaction selectivities of nitrogen and oxygen atoms in amide moiety is a challenging issue in organic synthesis. Herein, we present a chemodivergent cycloisomerization approach to construct isoquinolinone and iminoisocoumarin skeletons from o-alkenylbenzamide derivatives. The chemo-controllable strategy employed an exclusive 1,2-aryl migration/elimination cascade, enabled by different hypervalent iodine species generated in situ from the reaction of iodosobenzene (PhIO) with MeOH or 2,4,6-tris-isopropylbenzene sulfonic acid. DFT studies revealed that the nitrogen and oxygen atoms of the intermediates in the two reaction systems have different nucleophilicities and thus produce the selectivity of N or O-attack modes.
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Affiliation(s)
- Jiaxin He
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, 300072, Tianjin, China
| | - Feng-Huan Du
- State Key Laboratory of Elemento-Organic Chemistry, The Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, 300071, Tianjin, China
| | - Chi Zhang
- State Key Laboratory of Elemento-Organic Chemistry, The Research Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, 300071, Tianjin, China.
| | - Yunfei Du
- Tianjin Key Laboratory for Modern Drug Delivery & High-Efficiency, School of Pharmaceutical Science and Technology, Tianjin University, 300072, Tianjin, China.
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7
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Bo C, Chen F, Bu Q, Du ZH, Li M, Dai B, Liu N. Visible-Light-Driven Organocatalytic Alkoxylation of Benzylic C-H Bonds. J Org Chem 2023; 88:3532-3538. [PMID: 36881000 DOI: 10.1021/acs.joc.2c02743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
A variety of strategies for direct alkoxylation of the benzyl C-H bond have been developed toward the construction of benzyl ethers. The light-induced benzyl C-H bond alkoxylation provides an alternative strategy for the synthesis of these important intermediates. The photocatalyzed alkoxylation of the benzyl C-H bond has dominated by metal-catalyzed methods. Herein, we reported a light-driven organocatalytic approach for alkoxylation of the benzyl C-H bond by the use of 9,10-dibromoanthracene as a photocatalyst and employing N-fluorobenzenesulfonimide as an oxidant. This reaction proceeds at room temperature and is capable of converting a variety of alkyl biphenyl and coupling partners, including a variety of alcohol and carboxylic acid, as well as peroxide, to the desired products under 400 nm light irradiation.
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Affiliation(s)
- Chunbo Bo
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
| | - Fei Chen
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
| | - Qingqing Bu
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
| | - Zhi-Hong Du
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
| | - Min Li
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
| | - Bin Dai
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
| | - Ning Liu
- School of Chemistry and Chemical Engineering/State Key Laboratory Incubation Base for Green Processing of Chemical Engineering, Shihezi University, North Fourth Road, Shihezi, Xinjiang 832003, China
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8
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Stroek W, Hoareau L, Albrecht M. From the bottle: simple iron salts for the efficient synthesis of pyrrolidines via catalytic C-H bond amination. Catal Sci Technol 2023; 13:958-962. [PMID: 36825222 PMCID: PMC9939938 DOI: 10.1039/d2cy02065c] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 01/24/2023] [Indexed: 01/27/2023]
Abstract
Commercially available iron salts FeX2 are remarkably active catalysts for pyrrolidine formation from organic azides via direct C-H bond amination. With FeI2, amination is fast and selective, (<30 min for 80% yield at 2 mol% loading), TONs up to 370 are reached with just 0.1 mol% catalyst, different functional groups are tolerated, and a variety of C-H bonds were activated.
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Affiliation(s)
- Wowa Stroek
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Lilian Hoareau
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
| | - Martin Albrecht
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern Freiestrasse 3 CH-3012 Bern Switzerland
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9
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Zhang LY, Wang NX, Yan Z, Wu YH, Gao XW, Feng K, Lucan D, Xing Y. Efficient Aerobic Oxidative Coupling of Methyl Heteroarenes with Indoles. Chemistry 2023; 29:e202202240. [PMID: 36345123 DOI: 10.1002/chem.202202240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 11/05/2022] [Accepted: 11/07/2022] [Indexed: 11/11/2022]
Abstract
Direct oxidative coupling of inert C(sp3 )-H bond has been a great challenge. Herein, an environmentally friendly aerobic oxidative coupling of α-methyl substituted N-heteroarenes with indoles is reported. A variety of diheteroaryl ketones were prepared in good yields (up to 72 %). This protocol features simple operation and broad substrates scope (26 examples). Significantly, a plausible mechanism about catalytic cycle was proposed, and two key intermediates were confirmed by high resolution mass spectrometry.
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Affiliation(s)
- Lei-Yang Zhang
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Nai-Xing Wang
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Zhan Yan
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Yue-Hua Wu
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Xue-Wang Gao
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Ke Feng
- Technical Institute of Physics and Chemistry & University of Chinese Academy of Sciences, Chinese Academy of Sciences, Beijing, 100190, P.R. China
| | - Dumitra Lucan
- Technical Sciences Academy of Romania ASTR, Dacia Avenue no.26, Bucharest, Romania
| | - Yalan Xing
- Department of Chemistry, Hofstra University, Hempstead, NY 11549, USA
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10
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Abstract
The emergence of modern photocatalysis, characterized by mildness and selectivity, has significantly spurred innovative late-stage C-H functionalization approaches that make use of low energy photons as a controllable energy source. Compared to traditional late-stage functionalization strategies, photocatalysis paves the way toward complementary and/or previously unattainable regio- and chemoselectivities. Merging the compelling benefits of photocatalysis with the late-stage functionalization workflow offers a potentially unmatched arsenal to tackle drug development campaigns and beyond. This Review highlights the photocatalytic late-stage C-H functionalization strategies of small-molecule drugs, agrochemicals, and natural products, classified according to the targeted C-H bond and the newly formed one. Emphasis is devoted to identifying, describing, and comparing the main mechanistic scenarios. The Review draws a critical comparison between established ionic chemistry and photocatalyzed radical-based manifolds. The Review aims to establish the current state-of-the-art and illustrate the key unsolved challenges to be addressed in the future. The authors aim to introduce the general readership to the main approaches toward photocatalytic late-stage C-H functionalization, and specialist practitioners to the critical evaluation of the current methodologies, potential for improvement, and future uncharted directions.
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Affiliation(s)
- Peter Bellotti
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149Münster, Germany
| | - Huan-Ming Huang
- School of Physical Science and Technology, ShanghaiTech University, 201210Shanghai, China
| | - Teresa Faber
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149Münster, Germany
| | - Frank Glorius
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstraße 36, 48149Münster, Germany
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11
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Chen J, Wang H, Day CS, Martin R. Nickel-Catalyzed Site-Selective Intermolecular C(sp 3 )-H Amidation. Angew Chem Int Ed Engl 2022; 61:e202212983. [PMID: 36254803 DOI: 10.1002/anie.202212983] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Indexed: 11/06/2022]
Abstract
A nickel-catalyzed site-selective intermolecular amidation of saturated C(sp3 )-H bonds is reported. This mild protocol exhibits a predictable reactivity pattern to incorporate amide functions at C(sp3 )-H sites adjacent to nitrogen and oxygen atoms in either cyclic or acyclic frameworks, thus offering a complementary reactivity profile to existing oxidative-type processes or metal-catalyzed C(sp3 )-N bond-forming reactions operating via two-electron manifolds.
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Affiliation(s)
- Jinhong Chen
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, c/Marcel ⋅ lí Domingo, 1, 43007, Tarragona, Spain
| | - Hao Wang
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, c/Marcel ⋅ lí Domingo, 1, 43007, Tarragona, Spain
| | - Craig S Day
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
- Departament de Química Analítica i Química Orgànica, Universitat Rovira i Virgili, c/Marcel ⋅ lí Domingo, 1, 43007, Tarragona, Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Av. Països Catalans 16, 43007, Tarragona, Spain
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12
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Shimizu A, Shibata A, Kano T, Kumai Y, Kawakami R, Esaki H, Fukushima K, Tada N, Itoh A. Synthesis of 4-Imidazolidinones from Diamides and Ethynyl Benziodoxolones via Double Michael-Type Addition: Ethynyl Benziodoxolones as Electrophilic Ynol Synthons. Org Lett 2022; 24:8859-8863. [DOI: 10.1021/acs.orglett.2c03648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ayaka Shimizu
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Atsushi Shibata
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Takashi Kano
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Yuuichi Kumai
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Ryouhei Kawakami
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Hiroyoshi Esaki
- Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Kazuaki Fukushima
- Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya, Hyogo 663-8501, Japan
| | - Norihiro Tada
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
| | - Akichika Itoh
- Gifu Pharmaceutical University, 1-25-4 Daigaku-nishi, Gifu 501-1196, Japan
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13
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Sihag M, Soni R, Rani N, Kinger M, Kumar Aneja D. Recent Synthetic Applications of Hypervalent Iodine Reagents. A Review in Three Installments: Installment I. ORG PREP PROCED INT 2022. [DOI: 10.1080/00304948.2022.2113964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/10/2022]
Affiliation(s)
- Monika Sihag
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Rinku Soni
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Neha Rani
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Mayank Kinger
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
| | - Deepak Kumar Aneja
- Department of Chemistry, Chaudhary Bansi Lal University, Bhiwani, Haryana, India
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14
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Hopkins MD, Witt RC, Flusche AME, Philo JE, Ozmer GL, Purser GH, Sheaff RJ, Lamar AA. Synthesis and biological evaluation of N-alkyl sulfonamides derived from polycyclic hydrocarbon scaffolds using a nitrogen-centered radical approach. Org Biomol Chem 2022; 20:6680-6693. [PMID: 35950721 DOI: 10.1039/d2ob01291j] [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
Polycyclic hydrocarbons (PH) provide intriguing potential as lipophilic scaffolds within medicinal chemistry, but are currently limited by the availability of synthetic tools for predictable modification of the PH unit. Herein we report the development of new methods for installation of a sulfonamide unit to PH cores. In the first method, a xanthate ester serves as reagent for aminosulfonation using pre-formed imidoiodinane as N-source. An investigation of the reaction mechanism was performed to implicate a process involving a N-centered radical. An additional method for sulfonamide installation is described that involves the use of commercially available reagents and operationally convenient conditions. Using the new synthetic methods, 22 compounds were prepared and screened for biological activity against 6 mammalian cell lines along with Gram-positive and Gram-negative bacterial strains. Results of the viability assays have identified compounds that exhibit higher potency than other known anticancer agents such as indisulam and ABT-751. Additionally, the physicochemical and drug-likeness properties of the synthesized compounds have been determined experimentally and using in silico predictive tools. The initial exploration into sulfonamide insertion into PH cores has resulted in a number of compounds that warrant further development to produce molecules with therapeutic value.
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Affiliation(s)
- Megan D Hopkins
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - Ryan C Witt
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - Ann Marie E Flusche
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - John E Philo
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - Garett L Ozmer
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - Gordon H Purser
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - Robert J Sheaff
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
| | - Angus A Lamar
- Department of Chemistry and Biochemistry, The University of Tulsa, 800 South Tucker Drive, Tulsa, Oklahoma, 74104, USA.
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15
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Wang F, Chen J, Jia X, Zhuang D, Wan Z, Ma L, Li Z. Direct Benzylic C(sp 3)-O Coupling with Alcohol via Site-Selective C(sp 3)-H Cleavage at Room Temperature through a Remote Directing Group-Enabled Radical Relay Strategy. J Org Chem 2022; 87:10698-10709. [PMID: 35930467 DOI: 10.1021/acs.joc.2c00884] [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
Employing a low loading of the terminal oxidant, a remote directing group-enabled radical relay strategy for benzylic direct C(sp3)-H alkoxylation with alcohols at room temperature is developed. Satisfactory site-selectivity, chemoselectivity, and reaction scope are achieved under simple and mild conditions, and no ligand or additive is required. Mechanistic studies, ready conversions of the directing group, and other benzylic functionalizations currently under development in our laboratory further indicate the promising potentials of this remote directing group-enabled radical relay strategy.
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Affiliation(s)
- Fang Wang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
| | - Jiaming Chen
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
| | - Xiaoqi Jia
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
| | - Dailin Zhuang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
| | - Zhenyang Wan
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
| | - Lifang Ma
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
| | - Ziyuan Li
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, No. 24 South Section 1, Yihuan Road, Chengdu 61006, P. R. China
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16
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Hu SJ, Jiang LL, Qiu H, Luo CM, Guan YT, Li L, Dong Y, Lei KW, Wei WT. Cyclization/hydrolysis of 1,5-enenitriles initiated by sulfonyl radicals in the aqueous phase in the presence of the I 2/TBHP system. Org Biomol Chem 2022; 20:6418-6422. [PMID: 35876742 DOI: 10.1039/d2ob01124g] [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 novel cyclization/hydrolysis of 1,5-enenitriles for the synthesis of valuable pyrrolidine-2,4-diones in the aqueous phase using I2 as the catalyst and tert-butyl hydroperoxide (TBHP) as the oxidant is reported. In the presence of the I2/TBHP system, sulfonyl hydrazides produce sulfonyl radicals, which undergo radical addition, intramolecular cyclization, hydrogen abstraction, and hydrolysis to give the final products. The use of the inexpensive and environmentally friendly I2/TBHP catalytic oxidation system in the aqueous phase makes it a benign and sustainable strategy.
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Affiliation(s)
- Sen-Jie Hu
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Li-Lin Jiang
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Hui Qiu
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Chun-Mei Luo
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Yu-Tao Guan
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Long Li
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Youren Dong
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Ke-Wei Lei
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
| | - Wen-Ting Wei
- Institute of Drug Discovery Technology, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo, Zhejiang, 315211, China.
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17
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Ravindar L, Hasbullah SA, Hassan NI, Qin HL. Cross‐Coupling of C‐H and N‐H Bonds: a Hydrogen Evolution Strategy for the Construction of C‐N Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lekkala Ravindar
- Universiti Kebangsaan Malaysia Fakulti Teknologi dan Sains Maklumat Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Siti Aishah Hasbullah
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Nurul Izzaty Hassan
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Hua-Li Qin
- Wuhan University of Technology School of Chemistry 430070 Hubei CHINA
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18
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Roychowdhury P, Herrera RG, Tan H, Powers DC. Traceless Benzylic C-H Amination via Bifunctional N-Aminopyridinium Intermediates. Angew Chem Int Ed Engl 2022; 61:e202200665. [PMID: 35483017 DOI: 10.1002/anie.202200665] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Indexed: 11/06/2022]
Abstract
C-H amination reactions provide the opportunity to streamline the synthesis of nitrogen-containing organic small molecules. The impact of intermolecular C-H amination methods, however, is currently limited the frequent requirement for the amine precursors to bear activating groups, such as N-sulfonyl substituents, that are both challenging to remove and not useful synthetic handles for subsequent derivatization. Here, we introduce traceless nitrogen activation for C-H amination-which enables application of selective C-H amination chemistry to the preparation of diverse N-functionalized products-via sequential benzylic C-H N-aminopyridylation followed by Ni-catalyzed C-N cross-coupling with aryl boronic acids. Unlike many C-H amination reactions that provide access to protected amines, the current method installs an easily diversifiable synthetic handle that serves as a lynchpin for C-H amination, deaminative N-N functionalization sequences.
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Affiliation(s)
- Pritam Roychowdhury
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Roberto G Herrera
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - Hao Tan
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
| | - David C Powers
- Department of Chemistry, Texas A&M University, College Station, TX 77843, USA
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19
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Abstract
Synthetic chemists have long focused on selective C(sp 3)-N bond-forming approaches in response to the high value of this motif in natural products, pharmaceutical agents and functional materials. In recent years, visible light-induced protocols have become an important synthetic platform to promote this transformation under mild reaction conditions. These photo-driven methods rely on converting visible light into chemical energy to generate reactive but controllable radical species. This Review highlights recent advances in this area, mostly after 2014, with an emphasis placed on C(sp 3)-H bond activations, including amination of olefins and carbonyl compounds, and cross-coupling reactions.
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20
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Roychowdhury P, Herrera RG, Tan H, Powers DC. Traceless Benzylic C−H Amination via Bifunctional
N
‐Aminopyridinium Intermediates. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200665] [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)
| | - Roberto G. Herrera
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - Hao Tan
- Department of Chemistry Texas A&M University College Station TX 77843 USA
| | - David C. Powers
- Department of Chemistry Texas A&M University College Station TX 77843 USA
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21
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Golden DL, Suh SE, Stahl SS. Radical C(sp3)–H functionalization and cross-coupling reactions. Nat Rev Chem 2022; 6:405-427. [DOI: 10.1038/s41570-022-00388-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Li K, Li Q, Shi Q, He Y, Yu W, Chang J. Iodine‐Mediated sp3 C–H Amination Reactions Forming α‐Amino Ketones/Esters and Fused Imidazoles. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kailu Li
- Zhengzhou University College of Chemistry CHINA
| | - Qianmin Li
- Zhengzhou University College of Chemistry CHINA
| | - Qinhao Shi
- Zhengzhou University College of Chemistry CHINA
| | - Yanmin He
- Zhengzhou University College of Chemistry CHINA
| | - Wenquan Yu
- Zhengzhou University College of Chemistry 100 Science Avenue 450001 Zhengzhou CHINA
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23
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Bera SK, Mal P. Regiodivergent C-N Coupling of Quinazolinones Controlled by the Dipole Moments of Tautomers. Org Lett 2022; 24:3144-3148. [PMID: 35446038 DOI: 10.1021/acs.orglett.2c00847] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Herein, we report that the dipole moments of tautomers can be the controlling factor for regiodivergent synthesis of either 14H-quinazolino[3,2-f]phenanthridin-14-ones or 6H-quinazolino[1,2-f]phenanthridin-6-ones, selectively, from unmasked 2-([1,1'-biphenyl]-2-yl)quinazolin-4(3H)-one. An intramolecular C(sp2)-NH coupling reaction mediated by PhI(OCOOCF3)2 could lead to two different regioisomers selectively at different temperatures when the dielectric constants of solvents like hexafluoroisopropanol and trifluoroacetic acid matched with the tautomer's dipole moments.
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Affiliation(s)
- Shyamal Kanti Bera
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), An OCC of Homi Bhabha National Institute, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India
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24
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Tsujihara T, Sasaki R, Fukkoshi M, Hatakeyama S, Takehara T, Suzuki T, Kawano T. Synthesis of 6,7-benzene-fused tropane derivatives from isoindoline-aminal hybrid compound. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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25
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Galeotti M, Salamone M, Bietti M. Electronic control over site-selectivity in hydrogen atom transfer (HAT) based C(sp 3)-H functionalization promoted by electrophilic reagents. Chem Soc Rev 2022; 51:2171-2223. [PMID: 35229835 DOI: 10.1039/d1cs00556a] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The direct functionalization of C(sp3)-H bonds represents one of the most investigated approaches to develop new synthetic methodology. Among the available strategies for intermolecular C-H bond functionalization, increasing attention has been devoted to hydrogen atom transfer (HAT) based procedures promoted by radical or radical-like reagents, that offer the opportunity to introduce a large variety of atoms and groups in place of hydrogen under mild conditions. Because of the large number of aliphatic C-H bonds displayed by organic molecules, in these processes control over site-selectivity represents a crucial issue, and the associated factors have been discussed. In this review article, attention will be devoted to the role of electronic effects on C(sp3)-H bond functionalization site-selectivity. Through an analysis of the recent literature, a detailed description of the HAT reagents employed in these processes, the associated mechanistic features and the selectivity patterns observed in the functionalization of substrates of increasing structural complexity will be provided.
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Affiliation(s)
- Marco Galeotti
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
| | - Michela Salamone
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
| | - Massimo Bietti
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
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26
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Malviya BK, Jassal AK, Karnatak M, Verma VP, Sharma S. Electro-Oxidative sp 3 C-H Bond Functionalization and Annulation Cascade: Synthesis of Novel Heterocyclic Substituted Indolizines. J Org Chem 2022; 87:2898-2911. [PMID: 35104140 DOI: 10.1021/acs.joc.1c02773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Indolizine derivatives are prevalent in many synthetic intermediates, pharmaceuticals, and organic materials. Herein, we report a novel electro-oxidative cascade cyclization reaction that uses electricity as the primary energy input to promote the reaction, leading to a series of heterocyclic substituted indolizine derivatives under exogenous-oxidant-free conditions. It is noteworthy that this electrochemical method provides a novel strategy for generating heterocyclic diversity of quinazolinones and quinolines on indolizines. In addition, the sole byproduct in the reaction was molecular hydrogen.
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Affiliation(s)
- Bhanwar Kumar Malviya
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur, Rajasthan 313001, India
| | - Amanpreet Kaur Jassal
- Department of Chemistry, Indian Institute of Technology, Delhi, New Delhi 110016, India
| | - Manvika Karnatak
- Department of Chemistry, Banasthali University, Newai-Jodhpuriya Road, Vanasthali, Rajasthan 304022, India
| | - Ved Prakash Verma
- Department of Chemistry, Banasthali University, Newai-Jodhpuriya Road, Vanasthali, Rajasthan 304022, India
| | - Siddharth Sharma
- Department of Chemistry, Mohanlal Sukhadia University, Udaipur, Rajasthan 313001, India
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27
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Zhao X, Yang F, Zou SY, Zhou QQ, Chen ZS, Ji K. Cu-Catalyzed Intermolecular γ-Site C–H Amination of Cyclohexenone Derivatives: The Benefit of Bifunctional Ligands. ACS Catal 2022. [DOI: 10.1021/acscatal.1c05439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xin Zhao
- College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
- School of Pharmacy, Baotou Medical College, Baotou 014060, Inner Mongolia, P. R. China
| | - Fang Yang
- College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
| | - Shao-Yu Zou
- College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
| | - Qian-Qian Zhou
- College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
| | - Zi-Sheng Chen
- College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
| | - Kegong Ji
- College of Chemistry and Pharmacy, Northwest A&F University, 3 Taicheng Road, Yangling, Xianyang 712100, Shaanxi, P. R. China
- Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, Shenzhen 518055, P. R. China
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28
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Chen J, Wang F, Huang Y, Jia X, Zhuang D, Wan Z, Li Z. Remote carbamate-directed site-selective benzylic C–H oxygenation via synergistic copper/TEMPO catalysis at room temperature. Org Chem Front 2022. [DOI: 10.1039/d2qo00435f] [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 benzylic C(sp3)–H oxygenation with water at room temperature through a ligand- and additive-free synergistic copper/TEMPO-catalysed radical relay pathway and a remote directing strategy is described.
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Affiliation(s)
- Jiaming Chen
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Fang Wang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Yanping Huang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
- Engineering Experimental Teaching Centre, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Xiaoqi Jia
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Dailin Zhuang
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Zhenyang Wan
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
| | - Ziyuan Li
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu 610065, China
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29
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Wang Z, Yang B, Yang Q, Wang Y. C(sp 3)–H 1,3-diamination of cumene derivatives catalyzed by a dirhodium( ii) catalyst. Org Chem Front 2022. [DOI: 10.1039/d2qo00461e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Using the single-electron oxidation cycle of a dirhodium catalyst, amination can form two primary C–N bonds in a one-step process.
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Affiliation(s)
- Zhifan Wang
- College of Chemistry, Sichuan University, Chengdu, 610041, P.R. China
| | - Beiqi Yang
- College of Chemistry, Sichuan University, Chengdu, 610041, P.R. China
| | - Qi Yang
- College of Chemistry, Sichuan University, Chengdu, 610041, P.R. China
| | - Yuanhua Wang
- College of Chemistry, Sichuan University, Chengdu, 610041, P.R. China
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30
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Battaglioli S, Bertuzzi G, Pedrazzani R, Benetti J, Valenti G, Montalti M, Monari M, Bandini M. Visible‐Light‐Assisted Synthesis of Allylic Triflamides via Dual Acridinium/Co Catalysis. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101329] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Simone Battaglioli
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Giulio Bertuzzi
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
- Center for Chemical Catalysis – C3, Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Riccardo Pedrazzani
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
- Center for Chemical Catalysis – C3, Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Jessica Benetti
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Giovanni Valenti
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
- Center for Chemical Catalysis – C3, Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Marco Montalti
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
- Center for Chemical Catalysis – C3, Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Magda Monari
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
- Center for Chemical Catalysis – C3, Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
| | - Marco Bandini
- Dipartimento di Chimica “Giacomo Ciamician” Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
- Center for Chemical Catalysis – C3, Alma Mater Studiorum – Università di Bologna via Selmi 2 40126 – Bologna Italy
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31
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Narobe R, Murugesan K, Schmid S, König B. Decarboxylative Ritter-Type Amination by Cooperative Iodine (I/III)─Boron Lewis Acid Catalysis. ACS Catal 2021. [DOI: 10.1021/acscatal.1c05077] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Rok Narobe
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93053 Regensburg, Germany
| | - Kathiravan Murugesan
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93053 Regensburg, Germany
| | - Simon Schmid
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93053 Regensburg, Germany
| | - Burkhard König
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93053 Regensburg, Germany
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32
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Liu H, Zhang B, Zhao W, Yu X, Zhu W, Xia C, Zhou Y. Base-Mediated Coupling Reactions of Benzenesulfonyl Azides with Proline: Synthesis of Proline-Derived Benzenesulfonamides. ACS OMEGA 2021; 6:34796-34804. [PMID: 34963962 PMCID: PMC8697382 DOI: 10.1021/acsomega.1c05331] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Accepted: 11/24/2021] [Indexed: 06/14/2023]
Abstract
Sulfonamides and lipids are widely found in natural products, bioactive substances, and pharmaceuticals. Here, we report N-sulfonylation and esterification of carboxylic acids in an environment-friendly one-pot tandem protocol involving 1,2-dichloroethane (DCE). Moreover, 1,8-diazabicyclo (5.4.0) undec-7-ene was necessary for this reaction as a strong base, which drives the reaction to completion. Although DCE is a very low activity reagent, it acts not only as a solvent but also as a reactant in the reaction. The β-chloroester contained in the reaction product can be easily dissociated to react with N, S, and O atoms, increasing the possibility for subsequent synthesis.
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Affiliation(s)
- Hongyan Liu
- Pharmacy
College, Institute of Pharmacology, Shandong
First Medical University & Shandong Academy of Medical Sci-ences, Taian 271016, China
| | - Bin Zhang
- Chemistry
and Material Science College, Shandong Agricultural
University, Taian 271018, China
| | - Wei Zhao
- Pharmacy
College, Institute of Pharmacology, Shandong
First Medical University & Shandong Academy of Medical Sci-ences, Taian 271016, China
| | - Xiao Yu
- Pharmacy
College, Institute of Pharmacology, Shandong
First Medical University & Shandong Academy of Medical Sci-ences, Taian 271016, China
| | - Wenjing Zhu
- Pharmacy
College, Institute of Pharmacology, Shandong
First Medical University & Shandong Academy of Medical Sci-ences, Taian 271016, China
| | - Chengcai Xia
- Pharmacy
College, Institute of Pharmacology, Shandong
First Medical University & Shandong Academy of Medical Sci-ences, Taian 271016, China
| | - Yanmeng Zhou
- Pharmacy
College, Institute of Pharmacology, Shandong
First Medical University & Shandong Academy of Medical Sci-ences, Taian 271016, China
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33
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Nagao K, Ohmiya H. Carbocation Generation by Organophotoredox Catalysis. J SYN ORG CHEM JPN 2021. [DOI: 10.5059/yukigoseikyokaishi.79.1005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kazunori Nagao
- Division of Pharmaceutical Sciences, Graduate School of Medical Sciences, Kanazawa University
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34
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Gao Y, Zhao Q, Li L, Ma YN. Synthesis of Six-Membered N-Heterocycle Frameworks Based on Intramolecular Metal-Free N-Centered Radical Chemistry. CHEM REC 2021; 22:e202100218. [PMID: 34618405 DOI: 10.1002/tcr.202100218] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 09/14/2021] [Accepted: 09/15/2021] [Indexed: 12/29/2022]
Abstract
The formation of intramolecular C-N bond represents a powerful strategy in organic transformation as the great importance of N-heterocycles in the fields of natural products and bioactive molecules. This personal account describes the synthesis of cyclic phosphinamidation, benzosultam, benzosulfoximine, phenanthridine and their halogenated compounds through transition-metal-free intramolecular oxidative C-N bond formation. Mechanism study reveals that N-X bond is initially formed under the effect of hypervalent halogen, which is very unstable and easily undergoes thermal or light homolytic cleavage to generate nitrogen radical. Then the nitrogen radical is trapped by the arene to give aryl radical. Rearomatization of aryl radical under the oxidant to provide corresponding N-heterocycle. Under suitable conditions, the N-heterocycles can be further transformed to halogenated N-heterocycles.
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Affiliation(s)
- Yan Gao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Qianyi Zhao
- Henan Key Laboratory of Boron Chemistry and Advanced Energy Materials, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, 453007, China
| | - Lixin Li
- Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, 156 Jinshui East Road, Zhengzhou, 450046, Henan, China
| | - Yan-Na Ma
- Green Catalysis Center and College of Chemistry, Zhengzhou University, Zhengzhou, 450001, China
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35
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Bera M, Lee DS, Cho EJ. Advances in N-centered intermediates by energy transfer photocatalysis. TRENDS IN CHEMISTRY 2021. [DOI: 10.1016/j.trechm.2021.06.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Lazib Y, Retailleau P, Saget T, Darses B, Dauban P. Asymmetric Synthesis of Enantiopure Pyrrolidines by C(sp 3 )-H Amination of Hydrocarbons. Angew Chem Int Ed Engl 2021; 60:21708-21712. [PMID: 34329511 DOI: 10.1002/anie.202107898] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Indexed: 11/07/2022]
Abstract
The asymmetric synthesis of enantiopure pyrrolidines is reported via a streamlined strategy relying on two sequential C-H functionalizations of simple hydrocarbons. The first step is a regio- and stereoselective catalytic nitrene C-H insertion. Then, a subsequent diastereoselective cyclization involving a 1,5-hydrogen atom transfer (HAT) from a N-centered radical leads to the formation of pyrrolidines that can then be converted to their free NH-derivatives.
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Affiliation(s)
- Yanis Lazib
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Pascal Retailleau
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Tanguy Saget
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
| | - Benjamin Darses
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France.,Université Grenoble Alpes, Département de Chimie Moléculaire, CNRS UMR-5250, 38058, Grenoble, France
| | - Philippe Dauban
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, Av. de la Terrasse, 91198, Gif-sur-Yvette, France
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37
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Lazib Y, Retailleau P, Saget T, Darses B, Dauban P. Asymmetric Synthesis of Enantiopure Pyrrolidines by C(sp
3
)−H Amination of Hydrocarbons. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202107898] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yanis Lazib
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Pascal Retailleau
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Tanguy Saget
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
| | - Benjamin Darses
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
- Université Grenoble Alpes Département de Chimie Moléculaire CNRS UMR-5250 38058 Grenoble France
| | - Philippe Dauban
- Université Paris-Saclay CNRS Institut de Chimie des Substances Naturelles UPR 2301 Av. de la Terrasse 91198 Gif-sur-Yvette France
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38
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Ghosh SK, Hu M, Comito R. One-Pot Synthesis of Primary and Secondary Aliphatic Amines via Mild and Selective sp3 C-H Imination. Chemistry 2021; 27:17601-17608. [PMID: 34387903 DOI: 10.1002/chem.202102627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Indexed: 11/09/2022]
Abstract
The direct replacement of sp3 C-H bonds with simple amine units (-NH2) remains synthetically challenging, although primary aliphatic amines are ubiquitous in medicinal chemistry and natural product synthesis. We report a mild and selective protocol for preparing primary and secondary aliphatic amines in a single pot, based on intermolecular sp3 C-H imination. The first C-H imination of diverse alkanes, this method shows useful site-selectivity within substrates bearing multiple sp3 C-H bonds. Furthermore, this reaction tolerates polar functional groups relevant for complex molecule synthesis, highlighted in the synthesis of amine pharmaceuticals and amination of natural products. We characterize a unique C-H imination mechanism based on radical rebound to an iminyl radical, supported by kinetic isotope effects, stereoablation, resubmission, and computational modeling. This work constitutes a selective method for complex amine synthesis and a new mechanistic platform for C-H amination.
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Affiliation(s)
- Subrata K Ghosh
- University of Houston, Chemistry, Department of Chemistry, 3585 Cullen Boulevard, Room 112, 77204-5003, Houston, UNITED STATES
| | - Mengnan Hu
- University of Houston, Chemistry, Department of Chemistry, 3585 Cullen Boulevard, Room 112, 77204-5003, Houstonn, UNITED STATES
| | - Robert Comito
- University of Houston, Chemistry, Department of Chemistry, 3585 Cullen Boulevard, Room 112, 77204-5003, Houston, UNITED STATES
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39
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Nakagawa M, Nagao K, Ikeda Z, Reynolds M, Ibáñez I, Wang J, Tokunaga N, Sasaki Y, Ohmiya H. Organophotoredox‐Catalyzed Decarboxylative N‐Alkylation of Sulfonamides. ChemCatChem 2021. [DOI: 10.1002/cctc.202100803] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Masanari Nakagawa
- Division of Pharmaceutical Sciences Graduate School of Medical Sciences Kanazawa University Kakuma-machi, Kanazawa 920-1192 Japan
| | - Kazunori Nagao
- Division of Pharmaceutical Sciences Graduate School of Medical Sciences Kanazawa University Kakuma-machi, Kanazawa 920-1192 Japan
| | - Zenichi Ikeda
- Research Takeda Pharmaceutical Company Limited Fujisawa, Kanagawa 251-8555 Japan
| | - Matthew Reynolds
- Research Takeda Pharmaceutical Company Limited Fujisawa, Kanagawa 251-8555 Japan
| | - Ignacio Ibáñez
- Research Takeda Pharmaceutical Company Limited Fujisawa, Kanagawa 251-8555 Japan
| | - Junsi Wang
- Research Takeda Pharmaceutical Company Limited Fujisawa, Kanagawa 251-8555 Japan
| | - Norihito Tokunaga
- Research Takeda Pharmaceutical Company Limited Fujisawa, Kanagawa 251-8555 Japan
| | - Yusuke Sasaki
- Research Takeda Pharmaceutical Company Limited Fujisawa, Kanagawa 251-8555 Japan
| | - Hirohisa Ohmiya
- Division of Pharmaceutical Sciences Graduate School of Medical Sciences Kanazawa University Kakuma-machi, Kanazawa 920-1192 Japan
- JST PRESTO Kawaguchi, Saitama 332-0012 Japan
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40
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Liu Z, Wu M, Lan M, Zhang W. Boosting cancer therapy efficiency via photoinduced radical production. Chem Sci 2021; 12:9500-9505. [PMID: 34349925 PMCID: PMC8278883 DOI: 10.1039/d1sc01220g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 06/14/2021] [Indexed: 01/09/2023] Open
Abstract
Current cancer therapy has been restricted by the hypoxic microenvironment of tumors, especially for strongly oxygen-dependent photodynamic therapy. To defeat tumor hypoxia, an oxygen-irrelevant radical nanogenerator, PI/FBC, is developed by the co-assembly of iodized polymer PI and NIR photosensitizer FBC, and further evaluated as a remote controllable free radical generation platform for enhancing antitumor efficiency. The PI/FBC radical nanogenerator can be excited by NIR light to produce ROS through transfer of energy to oxygen and induce the formation of toxic iodine radicals via electron transfer to PI. Notably, unlike conventional tumor treatments, such a radical nanogenerator is controllable and insusceptible to oxygen concentration. Moreover, benefiting from the strong NIR emission of FBC, the distribution of the PI/FBC radical nanogenerator can be monitored without incorporating other imaging agents. This PI/FBC radical nanogenerator treatment will no doubt broaden the family of antitumor strategies by using non-oxygen radicals, which is significant for reference in the development of promising anticancer agents.
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Affiliation(s)
- Zhiyong Liu
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Mengsi Wu
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Minbo Lan
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
| | - Weian Zhang
- Shanghai Key Laboratory of Functional Materials Chemistry, East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
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41
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Suh SE, Nkulu LE, Lin S, Krska SW, Stahl SS. Benzylic C-H isocyanation/amine coupling sequence enabling high-throughput synthesis of pharmaceutically relevant ureas. Chem Sci 2021; 12:10380-10387. [PMID: 34377424 PMCID: PMC8336431 DOI: 10.1039/d1sc02049h] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Accepted: 06/28/2021] [Indexed: 12/29/2022] Open
Abstract
C(sp3)–H functionalization methods provide an ideal synthetic platform for medicinal chemistry; however, such methods are often constrained by practical limitations. The present study outlines a C(sp3)–H isocyanation protocol that enables the synthesis of diverse, pharmaceutically relevant benzylic ureas in high-throughput format. The operationally simple C–H isocyanation method shows high site selectivity and good functional group tolerance, and uses commercially available catalyst components and reagents [CuOAc, 2,2′-bis(oxazoline) ligand, (trimethylsilyl)isocyanate, and N-fluorobenzenesulfonimide]. The isocyanate products may be used without isolation or purification in a subsequent coupling step with primary and secondary amines to afford hundreds of diverse ureas. These results provide a template for implementation of C–H functionalization/cross-coupling in drug discovery. A copper-based catalyst system composed of commercially available reagents enables C–H isocyanation with exquisite (hetero)benzylic site selectivity, enabling high-throughput access to pharmaceutically relevant ureas via coupling with amines.![]()
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Affiliation(s)
- Sung-Eun Suh
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison Wisconsin 53706 USA
| | - Leah E Nkulu
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison Wisconsin 53706 USA
| | - Shishi Lin
- Chemistry Capabilities for Accelerating Therapeutics, Merck & Co., Inc. 2000 Galloping Hill Road Kenilworth New Jersey 07033 USA
| | - Shane W Krska
- Chemistry Capabilities for Accelerating Therapeutics, Merck & Co., Inc. 2000 Galloping Hill Road Kenilworth New Jersey 07033 USA
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison 1101 University Avenue Madison Wisconsin 53706 USA
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42
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Qi Z, Li L, Liang YK, Ma AJ, Zhang XZ, Peng JB. Visible-Light-Induced Carbonylation of Indoles with Phenols under Metal-Free Conditions: Synthesis of Indole-3-carboxylates. Org Lett 2021; 23:4769-4773. [PMID: 34060850 DOI: 10.1021/acs.orglett.1c01494] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A visible-light-induced carbonylation of indoles with phenols for the synthesis of indole-3-carboxylates has been developed. The reaction proceeded via a radical carbonylation process in which elementary I2 was used as an effective photosensitive initiator and, thus, avoided the use of transition metal catalysts. A series of different aryl indole-3-carboxylates were prepared in moderate to good yields. The broad applicability of this methodology was further highlighted by the late-stage functionalization of several phenol-containing natural products and pharmaceuticals.
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Affiliation(s)
- Zhuang Qi
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Lin Li
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Ying-Kang Liang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Ai-Jun Ma
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Xiang-Zhi Zhang
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
| | - Jin-Bao Peng
- School of Biotechnology and Health Sciences, Wuyi University, Jiangmen, Guangdong 529020, People's Republic of China
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43
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Brunard E, Boquet V, Van Elslande E, Saget T, Dauban P. Catalytic Intermolecular C(sp 3)-H Amination: Selective Functionalization of Tertiary C-H Bonds vs Activated Benzylic C-H Bonds. J Am Chem Soc 2021; 143:6407-6412. [PMID: 33900759 DOI: 10.1021/jacs.1c03872] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A catalytic intermolecular amination of nonactivated tertiary C(sp3)-H bonds (BDE of 96 kcal·mol-1) is reported for substrates displaying an activated benzylic site (BDE of 85 kcal·mol-1). The tertiary C(sp3)-H bond is selectively functionalized to afford α,α,α-trisubstituted amides in high yields. This unusual site-selectivity results from the synergistic combination of Rh2(S-tfpttl)4, a rhodium(II) complex with a well-defined catalytic pocket, with tert-butylphenol sulfamate (TBPhsNH2), which leads to a discriminating rhodium-bound nitrene species under mild oxidative conditions. This catalytic system is very robust, and the reaction was performed on a 50 mmol scale with only 0.01 mol % of catalyst. The TBPhs group can be removed under mild conditions to afford the corresponding NH-free amines.
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Affiliation(s)
- Erwan Brunard
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Vincent Boquet
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Elsa Van Elslande
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Tanguy Saget
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Philippe Dauban
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
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44
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Wang SC, Feng MN, Ji Y, Han WW, Ke CY, Zhang QZ, Zhang XL. Ligand-free copper-catalyzed C(sp 3)-H imidation of aromatic and aliphatic methyl sulfides with N-fluorobenzenesulfonimide. RSC Adv 2021; 11:12136-12140. [PMID: 35423744 PMCID: PMC8696451 DOI: 10.1039/d1ra00686j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/20/2021] [Indexed: 12/26/2022] Open
Abstract
A novel and efficient process has been developed for copper-catalyzed C(sp3)-H direct imidation of methyl sulfides with N-fluorobenzenesulfonimide(NFSI). Without using any ligands, various methyl sulfides including aromatic and aliphatic methyl sulfides, can be transformed to the corresponding N-((phenylthio)methyl)-benzenesulfonamide derivatives in good to excellent yields.
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Affiliation(s)
- Si-Chang Wang
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Ming-Nan Feng
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Yue Ji
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Wei-Wei Han
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Cong-Yu Ke
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Qun-Zheng Zhang
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
| | - Xun-Li Zhang
- College of Chemistry and Chemical Engineering, Xi'an Shiyou University Xi'an 710065 China
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45
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Wei M, Liang D, Cao X, Luo W, Ma G, Liu Z, Li L. A Broad‐Spectrum Catalytic Amidation of Sulfonyl Fluorides and Fluorosulfates**. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mingjie Wei
- PCFM Lab and GDHPRC Lab School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Dacheng Liang
- PCFM Lab and GDHPRC Lab School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Xiaohui Cao
- School of Pharmacy Guangdong Pharmaceutical University Guangzhou 510006 P. R. China
| | - Wenjun Luo
- PCFM Lab and GDHPRC Lab School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Guojian Ma
- PCFM Lab and GDHPRC Lab School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Zeyuan Liu
- PCFM Lab and GDHPRC Lab School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
| | - Le Li
- PCFM Lab and GDHPRC Lab School of Chemistry Sun Yat-sen University Guangzhou 510275 P. R. China
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46
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Wei M, Liang D, Cao X, Luo W, Ma G, Liu Z, Li L. A Broad-Spectrum Catalytic Amidation of Sulfonyl Fluorides and Fluorosulfates*. Angew Chem Int Ed Engl 2021; 60:7397-7404. [PMID: 33337566 DOI: 10.1002/anie.202013976] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Revised: 11/30/2020] [Indexed: 12/18/2022]
Abstract
A broad-spectrum, catalytic method has been developed for the synthesis of sulfonamides and sulfamates. With the activation by the combination of a catalytic amount of 1-hydroxybenzotriazole (HOBt) and silicon additives, amidations of sulfonyl fluorides and fluorosulfates proceeded smoothly and excellent yields were generally obtained (87-99 %). Noticeably, this protocol is particularly efficient for sterically hindered substrates. Catalyst loading is generally low and only 0.02 mol % of catalyst is required for the multidecagram-scale synthesis of an amantadine derivative. In addition, the potential of this method in medicinal chemistry has been demonstrated by the synthesis of the marketed drug Fedratinib via a key intermediate sulfonyl fluoride 13. Since a large number of amines are commercially available, this route provides a facile entry to access Fedratinib analogues for biological screening.
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Affiliation(s)
- Mingjie Wei
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Dacheng Liang
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Xiaohui Cao
- School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, 510006, P. R. China
| | - Wenjun Luo
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Guojian Ma
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Zeyuan Liu
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
| | - Le Li
- PCFM Lab and GDHPRC Lab, School of Chemistry, Sun Yat-sen University, Guangzhou, 510275, P. R. China
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47
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Zhou XY, Chen X, Liu HL. KI catalyzed C–H functionalization of acetone for the synthesis of 2-oxopropyl hetero-aromatic carboxylates. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1892762] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Xiao-Yu Zhou
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Xia Chen
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
| | - Hai-Long Liu
- School of Chemistry and Materials Engineering, Liupanshui Normal University, Liupanshui, China
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48
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Lee W, Jeon HJ, Jung H, Kim D, Seo S, Chang S. Controlled Relay Process to Access N-Centered Radicals for Catalyst-free Amidation of Aldehydes under Visible Light. Chem 2021. [DOI: 10.1016/j.chempr.2020.12.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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49
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Abstract
An organocatalytic site-selective electrochemical method for the benzylic C–H amination of alkylarenes with azoles through hydrogen evolution has been developed.
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Affiliation(s)
- Zhong-Wei Hou
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang, 318000, People's Republic of China
| | - Laiqiang Li
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang, 318000, People's Republic of China
| | - Lei Wang
- Advanced Research Institute and Department of Chemistry, Taizhou University, Taizhou, Zhejiang, 318000, People's Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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Hu Y, Ma X, Hou H, Sun W, Tu S, Wu M, Lin R, Xu X, Ke F. Electrochemical oxidative synthesis of 2-benzoylquinazolin-4(3 H)-one via C(sp 3)–H amination under metal-free conditions. Catal Sci Technol 2021. [DOI: 10.1039/d1cy01230d] [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
An electrochemically induced C(sp3)–H amination of 2-aminobenzamides with ketones using TBAI as a catalyst was developed, and provided 2-benzoylquinazolin-4(3H)-ones under metal-free conditions.
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Affiliation(s)
- Yongzhi Hu
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Xinhua Ma
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Huiqing Hou
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Weiming Sun
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Shuqing Tu
- Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou 350000, China
| | - Mei Wu
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Rongkun Lin
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Xiuzhi Xu
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
| | - Fang Ke
- School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University, Fuzhou 350004, China
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