1
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Koo J, Kim W, Jhun BH, Park S, Song D, You Y, Lee HG. Halogen Atom Transfer-Induced Homolysis of C-F Bonds by the Excited-State Boryl Radical. J Am Chem Soc 2024. [PMID: 39093360 DOI: 10.1021/jacs.4c06337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/04/2024]
Abstract
A novel reactivity toward C-F bond functionalization has been developed, which could be designated as fluorine atom transfer (FAT). A photoexcited state of an N-heterocyclic carbene-ligated boryl radical exhibits a transcendent reactivity, capable of activating chemically inert carbon-fluorine bonds through homolysis. Combined experimental and computational studies suggest that the ligated boryl radical species directly abstracts a fluorine atom from the organofluoride substrates to provide valuable carbon-centered radicals.
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Affiliation(s)
- Jangwoo Koo
- Department of Chemistry, College of Natural Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Weonjeong Kim
- Department of Chemistry, College of Natural Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Byung Hak Jhun
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Subin Park
- Department of Chemistry, College of Natural Science, Seoul National University, Seoul 08826, Republic of Korea
| | - Dayoon Song
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Youngmin You
- Department of Chemical and Biomolecular Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Hong Geun Lee
- Department of Chemistry, College of Natural Science, Seoul National University, Seoul 08826, Republic of Korea
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2
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Jo J, Kim S, Park S, Kim S, Lee S, Choi JH, Chung WJ. Study on Pyridine-Boryl Radical-Promoted, Ketyl Radical-Mediated Carbon-Carbon Bond-Forming Reactions. J Org Chem 2024; 89:8985-9000. [PMID: 38861548 DOI: 10.1021/acs.joc.4c00946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2024]
Abstract
Ketyl radicals are synthetically versatile reactive species, but their applications have been hampered by harsh generation conditions employing highly reducing metals. Recently, the pyridine-boryl radical received wide attention as a promising organic reductant because of its mildness as well as convenience in handling. While probing the utility of the pyridine-boryl radical, our group observed facile pinacol coupling reactivity that had not been known at that time. This serendipitous finding was successfully rendered into a practical synthesis of tetraaryl-1,2-diols in up to 99% yield within 1 h. Subsequently, upon examinations of various reaction manifolds, a diastereoselective ketyl-olefin cyclization was accomplished to produce cycloalkanols such as trans-2-alkyl-1-indanols. Compared to the previous methods, the stereocontrolling ability was considerably enhanced by taking advantage of the structurally modifiable boryl group that would be present near the bond-forming site. In this full account, our synthetic efforts with the O-boryl ketyl radicals are disclosed in detail, covering the discovery, optimization, scope expansion, and mechanistic analysis, including density functional theory (DFT) calculations.
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Affiliation(s)
- Junhyuk Jo
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Somi Kim
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Seonyoung Park
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Seonyul Kim
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Sunggi Lee
- Department of Physics and Chemistry, DGIST, 333 Techno jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea
| | - Jun-Ho Choi
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
| | - Won-Jin Chung
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea
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3
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Pan C, Chen D, Cheng Y, Yu JT. Photocatalytic redox-neutral α-C(sp 3)-H pyridination of glycine derivatives and N-arylamines with cyanopyridines. Chem Commun (Camb) 2024; 60:4451-4454. [PMID: 38563645 DOI: 10.1039/d4cc00906a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
A photo-induced α-C(sp3)-H decyanative pyridination of N-arylglycine derivatives with cyanopyridines was developed. This reaction was performed under organic photocatalytic and redox-neutral conditions via a radical-radical cross-coupling process. Besides, the protocol was also suitable for the C(sp3)-H pyridination of N-aryl tetrahydroisoquinolines as well as benzylamines.
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Affiliation(s)
- Changduo Pan
- School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
| | - Dongdong Chen
- School of Chemistry and Chemical Engineering, Jiangsu University of Technology, Changzhou 213001, P. R. China.
| | - Yangjian Cheng
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
| | - Jin-Tao Yu
- School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China.
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4
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Higashi Y, Shima K, Suzuki M, Fujishiro M, Kawai T, Morimoto T. Synthetic Utilization of 2 H-Heptafluoropropane: Ionic 1,4-Addition to Electron-Deficient Carbon-Carbon Unsaturated Bonds. J Org Chem 2024; 89:3962-3969. [PMID: 38443796 PMCID: PMC10949241 DOI: 10.1021/acs.joc.3c02798] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 02/13/2024] [Accepted: 02/23/2024] [Indexed: 03/07/2024]
Abstract
We have found a novel method for introducing heptafluoro-2-propyl CF(CF3)2 groups into carbon-carbon unsaturated bonds via a nucleophilic reaction using 2H-heptafluoropropane as the source of CF(CF3)2 groups. The reaction involves the nucleophilic addition of a heptafluoro-2-propyl anion, generated by treating 2H-heptafluoropropane with a fluoride ion, to various electron-deficient unsaturated compounds. This allows the easy synthesis of various aliphatic compounds containing heptafluoro-2-propyl groups.
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Affiliation(s)
- Yusuke Higashi
- Division
of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - Kotono Shima
- Division
of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - Mikiya Suzuki
- Division
of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - Moe Fujishiro
- Technology
and Innovation Center, Daikin Industries,
Ltd., Osaka 566-8585, Japan
| | - Tsuyoshi Kawai
- Division
of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
| | - Tsumoru Morimoto
- Division
of Materials Science, Graduate School of Science and Technology, Nara Institute of Science and Technology (NAIST), Ikoma, Nara 630-0192, Japan
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5
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Liu R, Zou T, Yu S, Li W, Wei S, Gong Y, Zhang Z, Zhang S, Yi D. Photoredox-Catalyzed Three-Component 1,2-Cyanoalkylpyridylation of Styrenes with Nonredox-Active Cyclic Oximes. J Org Chem 2023; 88:16410-16423. [PMID: 37943006 DOI: 10.1021/acs.joc.3c01936] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
Three-component alkene 1,2-difunctionalizations have emerged as a powerful strategy for rapid buildup of diverse and complex alkylpyridines, but the distal functionalized alkyl radicals for the alkene 1,2-alkylpyridylations were still rare. Herein, we report an example of regioselective three-component 1,2-cyanoalkylpyridylation of feedstock styrenes with accessible nonredox-active cyclic oximes through visible-light photoredox catalysis, providing a series of structurally diverse β-cyanoalkylated alkylpyridines. This protocol proceeds through a radical relay pathway including the generation of iminyl radicals enabled by phosphoranyl radical-mediated β-scission, radical transposition through C-C bond cleavage, highly selective radical addition, and precise radical-radical cross-coupling sequence, thus facilitating the regioselective formation of two distinct C-C single bonds in a single-pot operation. This synthetic strategy features mild conditions, broad compatibility of functional groups and substrate scope, diverse product derivatization, and late-stage modification.
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Affiliation(s)
- Rui Liu
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Ting Zou
- Pharmacy Intravenous Admixture Service, The Affiliated Traditional Chinese Medicine Hospital of Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Sha Yu
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Weicai Li
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Siping Wei
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Yimou Gong
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Zhijie Zhang
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
| | - Shiqi Zhang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Dong Yi
- Green Pharmaceutical Technology Key Laboratory of Luzhou City, Central Nervous System Drug Key Laboratory of Sichuan Province, School of Pharmacy, Southwest Medical University, Luzhou 646000, Sichuan, China
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6
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Corral Suarez C, Colomer I. Trifluoromethylarylation of alkenes using anilines. Chem Sci 2023; 14:12083-12090. [PMID: 37969609 PMCID: PMC10631225 DOI: 10.1039/d3sc03868h] [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: 07/26/2023] [Accepted: 10/19/2023] [Indexed: 11/17/2023] Open
Abstract
Nitrogen containing compounds, such as anilines, are some of the most widespread and useful chemical species, although their high and unselective reactivity has prevented their incorporation into many interesting transformations, such as the functionalization of alkenes. Herein we report a method that allows the trifluoromethylarylation of alkenes using anilines, for the first time, with no need for additives, transition metals, photocatalysts or an excess of reagents. An in-depth mechanistic study reveals the key role of hexafluoroisopropanol (HFIP) as a unique solvent, establishing a hydrogen bonding network with aniline and trifluoromethyl reagent, that is responsible for the altered reactivity and exquisite selectivity. This work uncovers a new mode of reactivity that involves the use of abundant anilines as a non-prefunctionalized aromatic source and the simultaneous activation of trifluoromethyl hypervalent iodine reagent.
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Affiliation(s)
- Carlos Corral Suarez
- Instituto de Química Orgánica General (IQOG), CSIC Juan de la Cierva 3 28006 Madrid Spain
- IMDEA Nanociencia, Faraday 9 28049 Madrid Spain
| | - Ignacio Colomer
- Instituto de Química Orgánica General (IQOG), CSIC Juan de la Cierva 3 28006 Madrid Spain
- IMDEA Nanociencia, Faraday 9 28049 Madrid Spain
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7
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Gao L, Liang X, He L, Li G, Chen S, Cao J, Ma J, Wang G, Li S. Base-mediated C-B bond activation of benzylic boronate for the rapid construction of β-silyl/boryl functionalized 1,1-diarylalkanes from aromatic alkenes. Chem Sci 2023; 14:11881-11889. [PMID: 37920335 PMCID: PMC10619622 DOI: 10.1039/d3sc03666a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 10/11/2023] [Indexed: 11/04/2023] Open
Abstract
The effect of tBuOK on the existing state of benzylic boronates in the solution phase has been investigated in detail by NMR analysis and DFT calculations. It was determined that simply using an excess of tBuOK (2.0 equivalents) can result in the full deborylation of benzylic boronates to afford free benzyl potassium species. These mechanistic insights were leveraged for the facile construction of β-silyl/boryl functionalized 1,1-diarylalkanes from aromatic alkenes via the combination of base-mediated silylboration or diborylation of aromatic alkenes and nucleophilic-type reactions with various electrophiles. Based on further machine-learning-assisted screening, the scope of electrophiles for this transformation can be generalized to the challenging aromatic heterocycles. Late-stage functionalization performed on several drug-relevant molecules generates the highly valuable 1,1-diaryl framework.
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Affiliation(s)
- Liuzhou Gao
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
- School of Chemistry and Chemical Engineering, Yangzhou University Yangzhou 225009 China
| | - Xinyi Liang
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Linke He
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Guoao Li
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Shengda Chen
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Jia Cao
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Jing Ma
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Guoqiang Wang
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Shuhua Li
- Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
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8
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Kim S, Jo J, Lee S, Chung WJ. Stereochemical modulation of ketyl radical cyclization enabled by pyridine-boryl radicals: catalytic diastereoselective synthesis of trans-2-alkyl-1-indanols. Chem Commun (Camb) 2023; 59:11983-11986. [PMID: 37727049 DOI: 10.1039/d3cc02248j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Previously available ketyl radical cyclization conditions suffer from low and uncontrollable diastereoselectivity because of the absence of reagent-substrate interactions. In this report, stereochemical modulation was accomplished by taking advantage of the pyridine-boryl radical, which leaves the synthetically modifiable boronate moiety on the carbonyl oxygen near the reacting center during the stereo-determining cyclization step. In consequence, a catalytic diastereoselective synthesis of trans-2-substituted-1-indanols was achieved in the presence of a sterically congested six-membered diboronic ester and an efficient hydrogen atom donor.
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Affiliation(s)
- Somi Kim
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Junhyuk Jo
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea.
| | - Sunggi Lee
- Department of Physics and Chemistry, DGIST, 333 Techno jungang-daero, Hyeonpung-eup, Dalseong-gun, Daegu 42988, Republic of Korea.
| | - Won-Jin Chung
- Department of Chemistry, GIST, 123 Cheomdan-gwagiro, Buk-gu, Gwangju 61005, Republic of Korea.
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9
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Wang B, Zhang X, Cao Y, Zou L, Qi X, Lu Q. Electrooxidative Activation of B-B Bond in B 2 cat 2 : Access to gem-Diborylalkanes via Paired Electrolysis. Angew Chem Int Ed Engl 2023; 62:e202218179. [PMID: 36722684 DOI: 10.1002/anie.202218179] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 01/19/2023] [Accepted: 01/30/2023] [Indexed: 02/02/2023]
Abstract
This report describes the unprecedented electrooxidation of a solvent (e.g., DMF)-ligated B2 cat2 complex, whereby a solvent-stabilized boryl radical is formed via quasi-homolytic cleavage of the B-B bond in a DMF-ligated B2 cat2 radical cation. Cyclic voltammetry and density functional theory provide evidence to support this novel B-B bond activation strategy. Furthermore, a strategy for the electrochemical gem-diborylation of gem-bromides via paired electrolysis is developed for the first time, affording a range of versatile gem-diborylalkanes, which are widely used in synthetic society. Notably, this reaction approach is scalable, transition-metal-free, and requires no external activator.
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Affiliation(s)
- Bingbing Wang
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
| | - Xiangyu Zhang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Yangmin Cao
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
| | - Long Zou
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
| | - Xiaotian Qi
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China
| | - Qingquan Lu
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan, 430072, P. R. China
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10
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Wang Y, Cao Z, He Q, Huang X, Liu J, Neumann H, Chen G, Beller M. Activation of perfluoroalkyl iodides by anions: extending the scope of halogen bond activation to C(sp 3)-H amidation, C(sp 2)-H iodination, and perfluoroalkylation reactions. Chem Sci 2023; 14:1732-1741. [PMID: 36819859 PMCID: PMC9930934 DOI: 10.1039/d2sc06145g] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Accepted: 12/29/2022] [Indexed: 01/26/2023] Open
Abstract
A simple, efficient, and convenient activation of perfluoroalkyl iodides by tBuONa or KOH, without expensive photo- or transition metal catalysts, allows the promotion of versatile α-sp3 C-H amidation reactions of alkyl ethers and benzylic hydrocarbons, C-H iodination of heteroaryl compounds, and perfluoroalkylations of electron-rich π bonds. Mechanistic studies show that these novel protocols are based on the halogen bond interaction between perfluoroalkyl iodides and tBuONa or KOH, which promote homolysis of perfluoroalkyl iodides under mild conditions.
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Affiliation(s)
- Yaxin Wang
- College of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023 China .,Leibniz-Institute for Catalysis Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Zehui Cao
- College of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023 China
| | - Qin He
- College of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023 China
| | - Xin Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai UniversityTianjin 300071China
| | - Jiaxi Liu
- College of Pharmacy, Nanjing University of Chinese Medicine Nanjing 210023 China
| | - Helfried Neumann
- Leibniz-Institute for Catalysis Albert-Einstein-Str. 29a Rostock 18059 Germany
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai UniversityTianjin 300071China
| | - Matthias Beller
- Leibniz-Institute for Catalysis Albert-Einstein-Str. 29a Rostock 18059 Germany
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11
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Tang L, Lv G, Cheng R, Yang F, Zhou Q. Three-Component Perfluoroalkylvinylation of Alkenes Enabled by Dual DBU/Fe Catalysis. Chemistry 2023; 29:e202203332. [PMID: 36351885 DOI: 10.1002/chem.202203332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/06/2022] [Accepted: 11/09/2022] [Indexed: 11/11/2022]
Abstract
Herein, a simple and efficient strategy that involves dual 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU)/iron-catalyzed alkene perfluoroalkylvinylation by using perfluoroalkyl iodides and 2-aminonaphthalene-1,4-diones as coupling partners is demonstrated. In terms of the developed catalytic system, various styrenes and aliphatic alkenes are well-tolerated, leading to the accurate preparation of perfluoroalkyl-containing 2-aminonaphthalene-1,4-diones in excellent regioselectivity. Moreover, the protocol can be readily applied in late-stage modifications of natural products and pharmaceuticals. The title reactions are featured by easily accessible and inexpensive catalysts and substrates, broad substrate applicability, and mild reaction conditions. Mechanistic investigations reveal a tandem C-I cleavable alkylation and C-C vinylation enabled by cooperative DBU/iron catalysis.
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Affiliation(s)
- Lin Tang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P.R. China.,Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang, 464000, P.R. China
| | - Ge Lv
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P.R. China
| | - Ruimin Cheng
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P.R. China
| | - Fang Yang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P.R. China
| | - Qiuju Zhou
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, 464000, P.R. China
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12
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Visible light induced four component reaction of styrene for the access of thiodifluoroesters. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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13
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Xu M, Wang Z, Sun Z, Ouyang Y, Ding Z, Yu T, Xu L, Li P. Diboron(4)-Catalyzed Remote [3+2] Cycloaddition of Cyclopropanes via Dearomative/Rearomative Radical Transmission through Pyridine. Angew Chem Int Ed Engl 2022; 61:e202214507. [PMID: 36344444 DOI: 10.1002/anie.202214507] [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: 10/02/2022] [Indexed: 11/09/2022]
Abstract
Ring structures such as pyridine, cyclopentane or their combinations are important motifs in bioactive molecules. In contrast to previous cycloaddition reactions that necessitated a directly bonded initiating functional group, this work demonstrated a novel through-(hetero)arene radical transmission concept for selective activation of a remote bond. An efficient, metal-free and atom-economical [3+2] cycloaddition between 4-pyridinyl cyclopropanes and alkenes or alkynes has been developed for modular synthesis of pyridine-substituted cyclopentanes, cyclopentenes and bicyclo[2.1.1]hexanes that are difficult to access using known methods. This complexity-building reaction was catalyzed by a very simple and inexpensive diboron(4) compound and took place via dearomative/rearomative processes. The substrate scope was broad and more than 100 new compounds were prepared in generally high yields. Mechanistic experiments and density function theory (DFT) investigation supported a radical relay catalytic cycle involving alkylidene dihydropyridine radical intermediates and boronyl radical transfer.
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Affiliation(s)
- Ming Xu
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Zhijun Wang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, Xinjiang, 832003, China
| | - Zhaohui Sun
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Yizhao Ouyang
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Zhengwei Ding
- Department of Medicinal Chemistry, School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi, 710061, China
| | - Tao Yu
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China
| | - Liang Xu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi, Xinjiang, 832003, China
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, China
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14
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Tagami K, Ofuji Y, Kanbara T, Yajima T. Metal-free visible-light-induced hydroxy-perfluoroalkylation of conjugated olefins using enamine catalyst. RSC Adv 2022; 12:32790-32795. [PMID: 36425182 PMCID: PMC9667149 DOI: 10.1039/d2ra06679c] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2022] [Accepted: 11/05/2022] [Indexed: 07/22/2023] Open
Abstract
We developed a simple and sustainable method for the hydroxy-perfluoroalkylation of electron-deficient conjugated olefins and styrenes. In this protcol, in situ generated enamine forms electron-donor-accepter (EDA) complexes with perfluoroalkyl iodide, and reaction proceed with visible-light irradiation. Tertiary amine also interacts with perfluoroalkyl iodide via halogen-bonding, promoting the perfluoroalkyl radical generation. This reaction does not require any transition-metal or photoredox catalyst, and gaseous oxygen is used as the green hydroxy source. Moreover, various commercially available substrates and perfluoroalkyl iodides were tolerated, affording the desired hydroxy-perfluoroalkylated products in good to moderate yields (>50 examples, up to 90%).
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Affiliation(s)
- Koto Tagami
- Department of Chemistry, Faculty of Science, Ochanomizu University Otsuka, Bunkyo-ku Tokyo 112-8610 Japan
| | - Yu Ofuji
- Department of Chemistry, Faculty of Science, Ochanomizu University Otsuka, Bunkyo-ku Tokyo 112-8610 Japan
| | - Tadashi Kanbara
- Department of Chemistry, Faculty of Science, Ochanomizu University Otsuka, Bunkyo-ku Tokyo 112-8610 Japan
| | - Tomoko Yajima
- Department of Chemistry, Faculty of Science, Ochanomizu University Otsuka, Bunkyo-ku Tokyo 112-8610 Japan
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15
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Tang L, Lv G, Fu Y, Chang XP, Cheng R, Wang L, Zhou Q. Bifunctional 1,8-Diazabicyclo[5.4.0]undec-7-ene for Visible Light-Induced Heck-Type Perfluoroalkylation of Alkenes. J Org Chem 2022; 87:14763-14777. [DOI: 10.1021/acs.joc.2c02093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lin Tang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
- China Province Key Laboratory of Utilization of Non-metallic Mineral in the South of Henan, Xinyang, Henan 464000, China
| | - Ge Lv
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Ya Fu
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Xue-Ping Chang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Ruimin Cheng
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Lingling Wang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
| | - Qiuju Zhou
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, Henan 464000, China
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16
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Gao L, Liu X, Li G, Chen S, Cao J, Wang G, Li S. 1,2-Silylpyridylation Reaction of Aryl Alkenes with Silylboronate. Org Lett 2022; 24:5698-5703. [PMID: 35905289 DOI: 10.1021/acs.orglett.2c02074] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A metal-free silyl-pyridylation of alkenes using silyl boronates and B2pin2 through a pyridine-mediated B-interelement activation has been demonstrated, which provides a practical strategy for a variety of C4-silylalkylated pyridines. DFT calculations and control experiments show that the reaction proceeds through a silyl radical addition/radical-radical coupling sequence. This protocol features a broad substrate scope and excellent functional group compatibility, and thus it showcases great potential in the late-stage modification of bioactive molecules.
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Affiliation(s)
- Liuzhou Gao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Xueting Liu
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Guoao Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Shengda Chen
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Jia Cao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, P. R. China
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17
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Raut RK, Waghamare AB, Patel N, Majumdar M. Role of N, N′‐diboryl‐4, 4′‐bipyridinylidene in the Transition metal‐free Borylation of Aryl Halides and Direct C‐H arylation of Unactivated Benzene. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200089] [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)
- Ravindra K. Raut
- Indian Institute of Science Education and Research Pune Chemistry INDIA
| | | | - Niranjan Patel
- Indian Institute of Science Education and Research Pune Chemistry INDIA
| | - Moumita Majumdar
- Indian Institute of Science Education and Research, Pune Chemistry Dr. Homi Bhabha RoadPashan 411008 Pune INDIA
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18
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Qu CH, Gao LX, Tang Y, Liu Y, Luo XQ, Song GT. Metal-Free Reductive Coupling of para-Quinone Methides with 4-Cyanopyridines Enabled by Pyridine-Boryl Radicals: Access to Pyridylated Diarylmethanes with Anti-Cancer Activity. Chemistry 2022; 28:e202200264. [PMID: 35301762 DOI: 10.1002/chem.202200264] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Indexed: 11/07/2022]
Abstract
Reported herein is a streamlined protocol to produce pyridylated diarylmethanes through pyridine-boryl radical induced reductive coupling between para-quinone methides (p-QMs) and 4-cyanopyridines using bis(pinacolato)diboron (B2 pin2 ) as a templated reagent. The metal-free process is characterized by an operationally simple approach, excellent chemoselectivity (1,2- vs. 1,6-selectivity), and a broad substrate scope with good functional group compatibility. The mechanistic studies provided important insights into the reductive cross-coupling process between diarylmethyl radical and pyridine-boryl radical. Moreover, part of the obtained pyridylated diarylmethane products were screened against a panel of cancer cell lines, and 3 v was confirmed to significantly inhibit the proliferation of head and neck squamous cell carcinoma (HNSCC) cells. This method offers a platform for the preparation of new lead compounds with antitumor activity.
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Affiliation(s)
- Chuan-Hua Qu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing, 402160, P. R. China
| | - Li-Xia Gao
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing, 402160, P. R. China
| | - Yan Tang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing, 402160, P. R. China
| | - Yuan Liu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing, 402160, P. R. China
| | - Xiao-Qin Luo
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing, 402160, P. R. China
| | - Gui-Ting Song
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing, 402160, P. R. China
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19
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Ding Z, Liu Z, Wang Z, Yu T, Xu M, Wen J, Yang K, Zhang H, Xu L, Li P. Catalysis with Diboron(4)/Pyridine: Application to the Broad-Scope [3 + 2] Cycloaddition of Cyclopropanes and Alkenes. J Am Chem Soc 2022; 144:8870-8882. [PMID: 35532758 DOI: 10.1021/jacs.2c03673] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
In contrast to the extensive but non-recyclable use of tetraalkoxydiboron(4) compounds as stoichiometric reagents in diverse reactions, this article reports an atom-economical reaction using a commercial diboron(4) as the catalyst. The key to success was designing a catalytic cycle for radical [3 + 2] cycloaddition involving a pyridine cocatalyst to generate from the diboron(4) catalyst and reversibly mediate the transfer of boronyl radicals. In comparison with known [3 + 2] cycloaddition with transition metal-based catalysts, the current reaction features not only metal-free conditions, inexpensive and stable catalysts, and simple operation but also remarkably broadened substrate scope. In particular, previously unusable cyclopropyl ketones without an activating group and/or alkenes with 1,2-disubstitution and 1,1,2-trisubstitution patterns were successfully used for the first time. Consequently, challenging cyclopentane compounds with various levels of substitution (65 examples, 57 new products, up to six substituents at all five ring atoms) were readily prepared in generally high to excellent yield and diastereoselectivity. The reaction was also successfully applied in concise formal synthesis of an anti-obesity drug and building natural product-like complex bridged or spirocyclic compounds. Mechanistic experiments and computational investigation support the proposed radical relay catalysis featuring a pyridine-assisted boronyl radical catalyst. Overall, this work demonstrates the first approach to use tetraalkoxydiboron(4) compounds as catalysts and may lead to the development of new, green, and efficient transition metal-like boron-catalyzed organic reactions.
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Affiliation(s)
- Zhengwei Ding
- Department of Medicinal Chemistry, School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Zhi Liu
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
| | - Zhijun Wang
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Tao Yu
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
| | - Ming Xu
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
| | - Jingru Wen
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
| | - Kaiyan Yang
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China
| | - Hailong Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Xi'an Jiaotong University, Xi'an 710061, China
| | - Liang Xu
- School of Chemistry and Chemical Engineering/Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, Shihezi University, Shihezi 832003, China
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an 710054, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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20
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Cao J, Li G, Wang G, Gao L, Li S. Iodoperfluoroalkylation of unactivated alkenes via pyridine-boryl radical initiated atom-transfer radical addition. Org Biomol Chem 2022; 20:2857-2862. [PMID: 35297935 DOI: 10.1039/d2ob00453d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The pyridine/bis(pinacolate)diboron combination has been found to be able to initiate the iodoperfluoroalkylation of unactivated alkenes with perfluoroalkyl iodides. Theoretical calculations and control experiments indicate that the atom transfer radical addition mechanism is responsible for the formation of iodoperfluoroalkylation products. This metal-free and photo-free strategy is applicable to a wide range of perfluoroalkyl iodides and unactivated alkenes with good functional group tolerance. Further applications in iodoperfluoroalkylation of organic semiconductor-relevant or bioactive molecules demonstrate the synthetic potential of this method.
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Affiliation(s)
- Jia Cao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China. .,School of Chemistry and Chemical Engineering, Yan'an University, Yan'an 716000, P. R. China
| | - Guoao Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
| | - Liuzhou Gao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education, Institute of Theoretical and Computational Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210093, P. R. China.
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21
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Ma CH, Ji Y, Zhao J, He X, Zhang ST, Jiang YQ, Jiang YQ. Transition-metal-free three-component acetalation-pyridylation of alkenes via photoredox catalysis. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63917-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Qu CH, Huang R, Liu Y, Liu T, Song GT. Bromine-radical-induced C sp2–H difluoroalkylation of quinoxalinones and hydrazones through visible-light-promoted C sp3–Br bond homolysis. Org Chem Front 2022. [DOI: 10.1039/d2qo00710j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Bromine radicals derived from photo-induced Csp3–Br bond homolysis can mediate H abstraction/imine radical formation from quinoxalinones and hydrazones, which in turn quench the in situ-generated difluoroalkyl radicals to furnish the products.
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Affiliation(s)
- Chuan-Hua Qu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Run Huang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Yuan Liu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Tong Liu
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Gui-Ting Song
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
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23
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Ding W, Sheng J, Li J, Cheng X. Electroreductive 4-pyridylation of unsaturated compounds using gaseous ammonia as a hydrogen source. Org Chem Front 2022. [DOI: 10.1039/d2qo00132b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
By using ammonia as a hydrogen source, electrochemical pyridylation of unsaturated compounds is achieved with more than 50 examples. In particular, the β-keto ester could be converted to the corresponding tertiary β-hydroxyl ester for the first time.
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Affiliation(s)
- Weijie Ding
- Institute of Chemistry and Biomedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, Nanjing University, Nanjing, 210023, China
| | - Jie Sheng
- Institute of Chemistry and Biomedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, Nanjing University, Nanjing, 210023, China
| | - Jin Li
- Jiangsu Provincial Engineering Laboratory of Advanced Materials for Salt Chemical Industry, College of Chemical Engineering, Huaiyin Institute of Technology, Huaian, 223003, China
| | - Xu Cheng
- Institute of Chemistry and Biomedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, National Demonstration Center for Experimental Chemistry Education, Nanjing University, Nanjing, 210023, China
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24
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Shen Y, Lei N, Lu C, Xi D, Geng X, Tao P, Su Z, Zheng K. Construction of sterically congested oxindole derivatives via visible-light-induced radical-coupling. Chem Sci 2021; 12:15399-15406. [PMID: 34976361 PMCID: PMC8635216 DOI: 10.1039/d1sc05273j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 11/03/2021] [Indexed: 01/04/2023] Open
Abstract
The oxindole scaffold represents an important structural feature in many natural products and pharmaceutically relevant molecules. Herein, we report a visible-light-induced modular methodology for the synthesis of complex 3,3'-disubstituted oxindole derivatives. A library of valuable fluoroalkyl-containing highly sterically congested oxindole derivatives can be synthesized by a catalytic three-component radical coupling reaction under mild conditions (metal & photocatalyst free, >80 examples). This strategy shows high functional group tolerance and broad substrate compatibility (including a wide variety of terminal or non-terminal alkenes, conjugated dienes and enynes, and a broad array of polyfluoroalkyl iodide and oxindoles), which enables modular modification of complex drug-like compounds in one chemical step. The success of solar-driven transformation, large-scale synthesis, and the late-stage functionalization of bioactive molecules, as well as promising tumor-suppressing biological activities, highlights the potential for practical applications of this strategy. Mechanistic investigations, including a series of control experiments, UV-vis spectroscopy and DFT calculations, suggest that the reaction underwent a sequential two-step radical-coupling process and the photosensitive perfluoroalkyl benzyl iodides are key intermediates in the transformation.
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Affiliation(s)
- Yanling Shen
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Ning Lei
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Cong Lu
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Dailin Xi
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Xinxin Geng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Pan Tao
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Zhishan Su
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
| | - Ke Zheng
- Key Laboratory of Green Chemistry & Technology, Ministry of Education, College of Chemistry, Sichuan University Chengdu 610064 P. R. China
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25
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Franco M, Vargas EL, Tortosa M, Cid MB. Coupling of thiols and aromatic halides promoted by diboron derived super electron donors. Chem Commun (Camb) 2021; 57:11653-11656. [PMID: 34668910 DOI: 10.1039/d1cc05294b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
We have proven that pyridine-boryl complexes can be used as superelectron donors to promote the coupling of thiols and aromatic halides through a SRN1 mechanism. The reaction is efficient for a broad substrate scope, tolerating heterocycles including pyridines, enolizable or reducible functional groups. The method has been applied to intermediates in drug synthesis as well as interesting functionalized polythioethers through a controlled and consecutive intramolecular electron transfer process.
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Affiliation(s)
- Mario Franco
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
| | - Emily L Vargas
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
| | - Mariola Tortosa
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - M Belén Cid
- Department of Organic Chemistry, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain. .,Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain
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26
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Wang P, Li Y, Wang G. Tetrahydroxydiboron-Initiated Atom-Transfer Radical Cyclization. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1485-4956] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractIn this work, the first diboron reagent initiated atom-transfer radical cyclization was reported, in which the boryl radicals were generated by the homolytic cleavage of a B–B single bond weakened by the coordination of Lewis base. To clarify the role of carbonate and DMF in the cleavage of B–B bond, we calculated the free energy diagram of two pathways by density functional theory (DFT) investigations. The DFT calculation showed that the presence of carbonate facilitates the B–B bond cleavage to form boron radicals, which can be further stabilized by DMF. Subsequent atom-transfer cyclization initiated by stabilized dihydroxyboron radical is also energetically favored.
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27
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Ohmura T, Morimasa Y, Ichino T, Miyake Y, Murata Y, Suginome M, Tajima K, Taketsugu T, Maeda S. Mechanism of 2,6-Dichloro-4,4′-bipyridine-Catalyzed Diboration of Pyrazines Involving a Bipyridine-Stabilized Boryl Radical. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20210145] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Yohei Morimasa
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Tomoya Ichino
- Department of Chemistry, Faculty of Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
| | - Yusuke Miyake
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Yasujiro Murata
- Division of Synthetic Chemistry, Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan
| | - Kunihiko Tajima
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan
| | - Tetsuya Taketsugu
- Department of Chemistry, Faculty of Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21-W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
| | - Satoshi Maeda
- Department of Chemistry, Faculty of Science, Hokkaido University, N10-W8, Kita-ku, Sapporo, Hokkaido 060-0810, Japan
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, N21-W10, Kita-ku, Sapporo, Hokkaido 001-0021, Japan
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28
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Yu JM, Zhu LW, Hong XY, Gao H, Chen TT. Visible light-induced alkylpyridylation of styrenes via a reductive radical three-component coupling. Org Biomol Chem 2021; 19:5642-5648. [PMID: 34105570 DOI: 10.1039/d1ob00498k] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A visible light-induced and metal-free strategy for the intermolecular three-compoment alkylpyridylation of styrenes is reported. Hantzsch ester was found to be key to initiate the overall reductive radical coupling reaction. This radical process realized difunctionalization of styrenes, selectively yielding alkylated pyridines in good to excellent yields with a wide tolerance of functional groups, mild reaction conditions and simple operation. This new reaction complements existing visible light-induced variants of styrenes with NHP esters and expands the capabilities of radical-based cross-coupling reactions of pyridines.
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Affiliation(s)
- Jing-Miao Yu
- School of Pharmaceutical and Materials Engineering & Institute for Advanced Studies, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China
| | - Li-Wen Zhu
- School of Pharmaceutical and Materials Engineering, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.
| | - Xiao-Yuan Hong
- School of Pharmaceutical and Materials Engineering, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.
| | - Huan Gao
- School of Pharmaceutical and Materials Engineering, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.
| | - Ting-Ting Chen
- School of Pharmaceutical and Materials Engineering, Taizhou University, 1139 Shifu Avenue, Taizhou 318000, China.
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29
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Tong S, Li K, Ouyang X, Song R, Li J. Recent advances in the radical-mediated decyanative alkylation of cyano(hetero)arene. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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30
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Tsurugi H, Mashima K, Misal Castro LC, Sultan I. Pyridine-Mediated B–B Bond Activation of (RO)2B–B(OR)2 for Generating Borylpyridine Anions and Pyridine-Stabilized Boryl Radicals as Useful Boryl Reagents in Organic Synthesis. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1486-8169] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AbstractSignificant developments have been achieved in recent years toward the utilization of (RO)2B–B(OR)2 for exploring transition-metal-free organic transformations in organic synthesis. Among the various combinations of Lewis bases with diborons developed so far, pyridine derivatives are simple, commercially available, and cheap compounds to expand the synthetic utility of diborons by generating borylpyridine anions and pyridine-stabilized boryl radicals via B–B bond cleavage. These borylpyridine species mediate a series of transformations in both a catalytic and stoichiometric manner for C–X activation (X = halogen, CO2H, NR2) and concomitant C-borylation, hydroborylation, C–C bond formation, and reduction reactions.1 Introduction2 Reaction Pathway for B–B Bond Cleavage of Diborons with Electron-Deficient Pyridines3 Pyridine-Mediated B–B Bond Activation of (RO)2B–B(OR)2 for Application in Organic Synthesis3.1 Dehalogenative C-Borylation3.2 Desulfonative C-Borylation3.3 Decarboxylative C-Borylation3.4 Deaminative C-Borylation3.5 Hydroborylation3.6 C–C Bond Formation3.7 Pyridine Functionalization3.8 Deoxygenation and N-Borylation Reactions4 Conclusions
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31
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Kim M, You E, Park S, Hong S. Divergent reactivity of sulfinates with pyridinium salts based on one- versus two-electron pathways. Chem Sci 2021; 12:6629-6637. [PMID: 34040737 PMCID: PMC8132931 DOI: 10.1039/d1sc00776a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Accepted: 03/30/2021] [Indexed: 01/04/2023] Open
Abstract
One of the main goals of modern synthesis is to develop distinct reaction pathways from identical starting materials for the efficient synthesis of diverse compounds. Herein, we disclose the unique divergent reactivity of the combination sets of pyridinium salts and sulfinates to achieve sulfonative pyridylation of alkenes and direct C4-sulfonylation of pyridines by controlling the one- versus two-electron reaction manifolds for the selective formation of each product. Base-catalyzed cross-coupling between sulfinates and N-amidopyridinium salts led to the direct introduction of a sulfonyl group into the C4 position of pyridines. Remarkably, the reactivity of this set of compounds is completely altered upon exposure to visible light: electron donor-acceptor complexes of N-amidopyridinium salts and sulfinates are formed to enable access to sulfonyl radicals. In this catalyst-free radical pathway, both sulfonyl and pyridyl groups could be incorporated into alkenes via a three-component reaction, which provides facile access to a variety of β-pyridyl alkyl sulfones. These two reactions are orthogonal and complementary, achieving a broad substrate scope in a late-stage fashion under mild reaction conditions.
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Affiliation(s)
- Myojeong 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
| | - Euna You
- 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
| | - Seongjin Park
- 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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32
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Wen J, Yang X, Yan K, Qin H, Ma J, Sun X, Yang J, Wang H. Electroreductive C3 Pyridylation of Quinoxalin-2(1 H)-ones: An Effective Way to Access Bidentate Nitrogen Ligands. Org Lett 2021; 23:1081-1085. [PMID: 33439657 DOI: 10.1021/acs.orglett.0c04296] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The construction of functional N-containing active biomolecules and bidentate nitrogen ligands by electroreductive pyridylation of N-heteroaromatics is an eye-catching task and challenge. A simple and practical electroreductive-induced C3 pyridylation of quinoxalin-2(1H)-ones with readily available cyanopyridines is reported. More than 36 examples are supplied, and the reaction performed in >95% yield. The present protocol provides a convenient, efficient, and gram-scale synthesis strategy for a series of new types of potential bidentate nitrogen ligands.
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Affiliation(s)
- Jiangwei Wen
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Xiaoting Yang
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Kelu Yan
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Hongyun Qin
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Jing Ma
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Xuejun Sun
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Jianjing Yang
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
| | - Hua Wang
- Institute of Medicine and Materials Applied Technologies, College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu, Shandong 273165, P. R. China
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33
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Shen J, Zhang Y, Yu Y, Wang M. Metal-free visible-light-induced photoredox-catalyzed intermolecular pyridylation/phosphinoylation of alkenes. Org Chem Front 2021. [DOI: 10.1039/d0qo01218a] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A visible-light-induced and photoredox-catalyzed intermolecular pyridylation/phosphinoylation of alkenes using 4-cyanopyridine and diphenylphosphine oxide under mild metal-free conditions has been reported.
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Affiliation(s)
- Jiaxuan Shen
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| | - Yipin Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| | - Yanjiang Yu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
| | - Manman Wang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering Henan Normal University
- Xinxiang
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34
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Jo J, Kim S, Choi JH, Chung WJ. A convenient pinacol coupling of diaryl ketones with B2pin2via pyridine catalysis. Chem Commun (Camb) 2021; 57:1360-1363. [DOI: 10.1039/d0cc07723b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A practical pinacol coupling of diaryl ketones is developed by employing a stable diboron reagent and pyridine Lewis base catalyst. The operationally simple process affords the desired diols with excellent efficiency in up to 99% yield within 1 hour.
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Affiliation(s)
- Junhyuk Jo
- Department of Chemistry
- Gwangju Institute of Science and Technology (GIST)
- Buk-gu
- Republic of Korea
| | - Seonyul Kim
- Department of Chemistry
- Gwangju Institute of Science and Technology (GIST)
- Buk-gu
- Republic of Korea
| | - Jun-Ho Choi
- Department of Chemistry
- Gwangju Institute of Science and Technology (GIST)
- Buk-gu
- Republic of Korea
| | - Won-jin Chung
- Department of Chemistry
- Gwangju Institute of Science and Technology (GIST)
- Buk-gu
- Republic of Korea
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35
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Zhao K, Guo JY, Guan T, Wang YX, Tao JY, Zhang Y, Zhang QH, Ni K, Loh TP. Photoinitiated stereoselective direct C(sp 2)–H perfluoroalkylation and difluoroacetylation of enamides. Org Chem Front 2021. [DOI: 10.1039/d1qo00605c] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photoinitiated regio- and stereoselective C(sp2)–H perfluoroalkylation and difluoroacetylation of enamides are developed, furnishing biologically and physiologically privileged fluoro-containing enamide scaffolds.
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Affiliation(s)
- Kai Zhao
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Jing-Yu Guo
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Ting Guan
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Ying-Xue Wang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Ji-Yu Tao
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Yu Zhang
- College of Chemical Engineering
- Nanjing Forestry University
- Nanjing 210037
- China
| | - Qing-Hong Zhang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Kun Ni
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Teck-Peng Loh
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
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36
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Tang L, Yang F, Yang Z, Chen H, Cheng H, Zhang S, Zhou Q, Rao W. Application of Bifunctional 2-Amino-1,4-naphthoquinones in Visible-Light-Promoted Photocatalyst-Free Alkene Perfluoroalkyl-Alkenylation. Org Lett 2020; 23:519-524. [PMID: 33382626 DOI: 10.1021/acs.orglett.0c04036] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A simple and practical photochemical strategy for intermolecular perfluoroalkyl-alkenylation of alkenes with 2-amino-1,4-naphthoquinones and perfluoroalkyl iodides has been demonstrated under visible-light irradiation. Mechanistic studies reveal that easily available 2-amino-1,4-naphthoquinone substrates can serve as efficient photosensitizers to activate perfluoroalkyl iodides through a photoredox process. Therefore, the developed radical relay reaction proceeds smoothly without additional transition metals and photocatalysts.
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Affiliation(s)
- Lin Tang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China.,Henan Province Key Laboratory of Utilization of Non-metallic Mineral in the Sourth of Henan, Xinyang 464000, China
| | - Fang Yang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Zhen Yang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Hanfei Chen
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Hao Cheng
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Shuaifei Zhang
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Qiuju Zhou
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
| | - Weihao Rao
- College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang 464000, China
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37
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Stoletova NV, Moshchenkov AD, Smol'yakov AF, Gugkaeva ZT, Maleev VI, Katayev D, Larionov VA. Asymmetric Synthesis of Perfluoroalkylated α‐Amino Acids through Generated Radicals Using a Chiral Ni(II) Complex. Helv Chim Acta 2020. [DOI: 10.1002/hlca.202000193] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Nadezhda V. Stoletova
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Vavilov Str. 28 RU-119991 Moscow Russian Federation
| | - Andrey D. Moshchenkov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Vavilov Str. 28 RU-119991 Moscow Russian Federation
- Higher Chemical College of the Russian Academy of Sciences Dmitry Mendeleev University of Chemical Technology of Russia Miusskaya sq. 9 RU-125047 Moscow Russian Federation
| | - Alexander F. Smol'yakov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Vavilov Str. 28 RU-119991 Moscow Russian Federation
| | - Zalina T. Gugkaeva
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Vavilov Str. 28 RU-119991 Moscow Russian Federation
| | - Victor I. Maleev
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Vavilov Str. 28 RU-119991 Moscow Russian Federation
| | - Dmitry Katayev
- Department of Chemistry and Applied Biosciences Swiss Federal Institute of Technology ETH Zürich Vladimir-Prelog-Weg 2 CH-8093 Zürich Switzerland
| | - Vladimir A. Larionov
- A.N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences (INEOS RAS) Vavilov Str. 28 RU-119991 Moscow Russian Federation
- Peoples' Friendship University of Russia (RUDN University) Miklukho-Maklaya Str. 6 RU-117198 Moscow Russian Federation
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38
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Lin L, Liang Q, Kong X, Chen Q, Xu B. Electrochemical Tandem Fluoroalkylation-Cyclization of Vinyl Azides: Access to Trifluoroethylated and Difluoroethylated N-Heterocycles. J Org Chem 2020; 85:15708-15716. [PMID: 33226809 DOI: 10.1021/acs.joc.0c02213] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A transition-metal- and oxidant-free electrochemical strategy for radical fluoroalkylation of vinyl azides was developed. The reaction was carried out under mild conditions by using inexpensive and bench-stable RfSO2Na (Rf = CF3, CF2H) as fluorination reagents. Depending on the starting material, both the electrochemical radical cyclization and dearomatization products could be obtained. This method provides a green and safe approach to synthesize fluorinated nitrogen heterocycles.
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Affiliation(s)
- Long Lin
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Qi Liang
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Xianqiang Kong
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China.,School of Chemical Engineering and Materials, Changzhou Institute of Technology, No. 666 Liaohe Road, Changzhou 213032, China
| | - Qianjin Chen
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
| | - Bo Xu
- Key Lab of Science and Technology of Eco-Textile, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai 201620, China
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39
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Qin J, Luo M, An D, Li J. Electrochemical 1,2‐Diarylation of Alkenes Enabled by Direct Dual C–H Functionalizations of Electron‐Rich Aromatic Hydrocarbons. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011657] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jing‐Hao Qin
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
| | - Mu‐Jia Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
| | - De‐Lie An
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
| | - Jin‐Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
- Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education) Hunan Normal University Changsha 410081 China
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China
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40
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Qin J, Luo M, An D, Li J. Electrochemical 1,2‐Diarylation of Alkenes Enabled by Direct Dual C–H Functionalizations of Electron‐Rich Aromatic Hydrocarbons. Angew Chem Int Ed Engl 2020; 60:1861-1868. [DOI: 10.1002/anie.202011657] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2020] [Indexed: 11/08/2022]
Affiliation(s)
- Jing‐Hao Qin
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
| | - Mu‐Jia Luo
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
| | - De‐Lie An
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
| | - Jin‐Heng Li
- State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan University Changsha 410082 China
- Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong University Nanchang 330063 China
- Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education) Hunan Normal University Changsha 410081 China
- State Key Laboratory of Applied Organic Chemistry Lanzhou University Lanzhou 730000 China
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41
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Han J, San HH, Guo A, Wang L, Tang X. Boryl Radical‐Mediated C−H Activation of Inactivated Alkanes for the Synthesis of Internal Alkynes. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000772] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Jia‐Bin Han
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Huazhong University of Science and Technology 1037 Luoyu Road Wuhan 430074 People's Republic of China
| | - Htet Htet San
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Huazhong University of Science and Technology 1037 Luoyu Road Wuhan 430074 People's Republic of China
- Department of Industrial Chemistry Yadanabon University Amarapura Township Mandalay Region 05063 People's Republic of Myanmar
| | - Ao Guo
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Huazhong University of Science and Technology 1037 Luoyu Road Wuhan 430074 People's Republic of China
| | - Long Wang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Huazhong University of Science and Technology 1037 Luoyu Road Wuhan 430074 People's Republic of China
| | - Xiang‐Ying Tang
- School of Chemistry and Chemical Engineering and Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica Huazhong University of Science and Technology 1037 Luoyu Road Wuhan 430074 People's Republic of China
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42
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Jiao L, Zhou FY. Recent Developments in Transition-Metal-Free Functionalization and Derivatization Reactions of Pyridines. Synlett 2020. [DOI: 10.1055/s-0040-1706552] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
AbstractPyridine is an important structural motif that is prevalent in natural products, drugs, and materials. Methods that functionalize and derivatize pyridines have gained significant attention. Recently, a large number of transition-metal-free reactions have been developed. In this review, we provide a brief summary of recent advances in transition-metal-free functionalization and derivatization reactions of pyridines, categorized according to their reaction modes.1 Introduction2 Metalated Pyridines as Nucleophiles2.1 Deprotonation2.2 Halogen–Metal exchange3 Activated Pyridines as Electrophiles3.1 Asymmetric 2-Allylation by Chiral Phosphite Catalysis3.2 Activation of Pyridines by a Bifunctional Activating Group3.3 Alkylation of Pyridines by 1,2-Migration3.4 Alkylation of Pyridines by [3+2] Addition3.5 Pyridine Derivatization by Catalytic In Situ Activation Strategies3.6 Reactions via Heterocyclic Phosphonium Salts4 Radical Reactions for Pyridine Functionalization4.1 Pyridine Functionalization through Radical Addition Reactions4.2 Pyridine Functionalization through Radical–Radical Coupling Reactions5 Derivatization of Pyridines through the Formation of Meisenheimer-Type Pyridyl Anions6 Conclusion
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Affiliation(s)
- Lei Jiao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University
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43
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Qi JQ, Jiao L. DFT Study on the Mechanism of 4,4′-Bipyridine-Catalyzed Nitrobenzene Reduction by Diboron(4) Compounds. J Org Chem 2020; 85:13877-13885. [DOI: 10.1021/acs.joc.0c01963] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jian-Qing Qi
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Lei Jiao
- Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China
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44
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Sun ZY, Zhou S, Yang K, Guo M, Zhao W, Tang X, Wang G. Tetrahydroxydiboron-Promoted Radical Addition of Alkynols. Org Lett 2020; 22:6214-6219. [DOI: 10.1021/acs.orglett.0c02367] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ze-Ying Sun
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Sen Zhou
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Kai Yang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Minjie Guo
- Institute for Molecular Design and Synthesis, School of Pharmaceutical Science and Technology, Tianjin University, Tianjin 300072, P. R. China
| | - Wentao Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Xiangyang Tang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
| | - Guangwei Wang
- Tianjin Key Laboratory of Molecular Optoelectronic Science, Department of Chemistry, School of Science, Tianjin University, Tianjin 300072, P. R. China
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45
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Zhao S, Cai S, Wang M, Rao W, Xu H, Zhang L, Chu X, Shen Z. Selective C(
sp
3
)−H Functionalization of Alkyl Esters with
N
‐/
S
‐/
O
‐Nucleophiles Using Perfluoroalkyl Iodide as Oxidant. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000199] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Shi‐Wen Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 People's Republic of China
| | - Song‐Zhou Cai
- Institute of Advanced Synthesis, School of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 People's Republic of China
| | - Mao‐Lin Wang
- Institute of Advanced Synthesis, School of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 People's Republic of China
| | - Weidong Rao
- Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro-Forest Biomass, College of Chemical EngineeringNanjing Forestry University Nanjing 210037 People's Republic of China
| | - Haiyan Xu
- School of Environmental and Chemical EngineeringJiangsu University of Science and Technology, Zhenjiang Jiangsu 212003 People's Republic of China
| | - Lei Zhang
- Institute of Advanced Synthesis, School of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 People's Republic of China
| | - Xue‐Qiang Chu
- Institute of Advanced Synthesis, School of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 People's Republic of China
| | - Zhi‐Liang Shen
- Institute of Advanced Synthesis, School of Chemistry and Molecular EngineeringNanjing Tech University Nanjing 211816 People's Republic of China
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46
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Lee K, Lee S, Kim N, Kim S, Hong S. Visible‐Light‐Enabled Trifluoromethylative Pyridylation of Alkenes from Pyridines and Triflic Anhydride. Angew Chem Int Ed Engl 2020; 59:13379-13384. [DOI: 10.1002/anie.202004439] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 04/22/2020] [Indexed: 11/10/2022]
Affiliation(s)
- Kangjae Lee
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Seojin Lee
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Namhoon Kim
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Seonyul Kim
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Sungwoo Hong
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
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47
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Lee K, Lee S, Kim N, Kim S, Hong S. Visible‐Light‐Enabled Trifluoromethylative Pyridylation of Alkenes from Pyridines and Triflic Anhydride. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004439] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Kangjae Lee
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Seojin Lee
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Namhoon Kim
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Seonyul Kim
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
| | - Sungwoo Hong
- Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
- Center for Catalytic Hydrocarbon Functionalizations Institute for Basic Science (IBS) Daejeon 34141 Republic of Korea
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48
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Mathi GR, Jeong Y, Moon Y, Hong S. Photochemical Carbopyridylation of Alkenes Using
N
‐Alkenoxypyridinium Salts as Bifunctional Reagents. Angew Chem Int Ed Engl 2020; 59:2049-2054. [DOI: 10.1002/anie.201913320] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/11/2019] [Indexed: 02/05/2023]
Affiliation(s)
- Gangadhar Rao Mathi
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yujin Jeong
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Yonghoon Moon
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
| | - Sungwoo Hong
- Center for Catalytic Hydrocarbon FunctionalizationsInstitute for Basic Science (IBS) Daejeon 34141 Republic of Korea
- Department of ChemistryKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
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49
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Yang HB, Wang ZH, Li JM, Wu C. Modular synthesis of α-aryl β-perfluoroalkyl ketones via N-heterocyclic carbene catalysis. Chem Commun (Camb) 2020; 56:3801-3804. [DOI: 10.1039/d0cc00293c] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A new strategy of assembling alkene, aldehyde and perfluoroalkyl reagents under the catalysis of an N-heterocyclic carbene afforded valuable α-aryl β-perfluoroalkyl ketones.
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Affiliation(s)
- Hai-Bin Yang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Zhi-Hou Wang
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Jin-Mei Li
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
| | - Chuande Wu
- School of Chemical Engineering and Light Industry
- Guangdong University of Technology
- Guangzhou 510006
- P. R. China
- State Key Laboratory of Silicon Materials
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50
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Gao L, Wang G, Chen H, Cao J, Su X, Liu X, Yang M, Cheng X, Li S. Metal-free reductive coupling of aliphatic aldehydes/ketones with 4-cyanopyridines: expanded scope and mechanistic studies. Org Chem Front 2020. [DOI: 10.1039/d0qo00827c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A practical B2pin2 mediated reductive coupling of 4-cyanopyridine with aliphatic aldehydes/ketones has been established. This metal-free protocol provides a convenient route to construct a wide range of C4-pyridine-functionalized alcohols.
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Affiliation(s)
- Liuzhou Gao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Guoqiang Wang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Hui Chen
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Jia Cao
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xiaoshi Su
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xueting Liu
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Mo Yang
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Xu Cheng
- Institute of Chemistry and Biomedical Sciences
- Jiangsu Key Laboratory of Advanced Organic Material
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
| | - Shuhua Li
- Key Laboratory of Mesoscopic Chemistry of Ministry of Education
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing
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