151
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Yusubov MS, Soldatova NS, Postnikov PS, Valiev RR, Svitich DY, Yusubova RY, Yoshimura A, Wirth T, Zhdankin VV. Reactions of 1-Arylbenziodoxolones with Azide Anion: Experimental and Computational Study of Substituent Effects. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701595] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | | | | | | | | | | | | | - Thomas Wirth
- School of Chemistry; Cardiff University; Park Place CF10 3AT Cardiff UK
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry; University of Minnesota; 55812 Duluth MN USA
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152
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Cortés González MA, Nordeman P, Bermejo Gómez A, Meyer DN, Antoni G, Schou M, Szabó KJ. [18F]fluoro-benziodoxole: a no-carrier-added electrophilic fluorinating reagent. Rapid, simple radiosynthesis, purification and application for fluorine-18 labelling. Chem Commun (Camb) 2018; 54:4286-4289. [DOI: 10.1039/c8cc00526e] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An electrophilic 18F transfer reagent was synthetized by rapid, operationally simple ligand exchange from a hypervalent iodine and [18F]TBAF.
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Affiliation(s)
| | | | - Antonio Bermejo Gómez
- Department of Organic Chemistry
- Stockholm University
- Sweden
- AstraZeneca PET Centre at Karolinska Institutet
- Stockholm
| | | | - Gunnar Antoni
- Department of Medicinal Chemistry
- Uppsala University
- Sweden
| | - Magnus Schou
- AstraZeneca PET Centre at Karolinska Institutet
- Stockholm
- Sweden
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153
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Lv Y, Ogunlana AA, Li H, Gao D, Wang C, Bao X. Understanding the chemoselectivities between carbonyl and hydroxyl groups in the Rh(ii)–azavinyl carbene involved reactions. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00899j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Computational studies were carried out to understand the chemoselectivities between carbonyl and hydroxyl groups in the Rh(ii)–AVC involved reactions.
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Affiliation(s)
- Yuanzheng Lv
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Abosede Adejoke Ogunlana
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Hongli Li
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Dafang Gao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Chenli Wang
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
| | - Xiaoguang Bao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
- China
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154
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Zhou Y, Li D, Tang S, Sun H, Huang J, Zhu Q. PhI(OAc)2-mediated dearomative C–N coupling: facile construction of the spiro[indoline-3,2′-pyrrolidine] skeleton. Org Biomol Chem 2018; 16:2039-2042. [DOI: 10.1039/c8ob00343b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A facile construction of the spiro[indole-3,2′-pyrrolidine] skeleton, through diacetoxyiodobenzene (PIDA) mediated C–N bond-forming dearomatization of C3 sulfonamide linked indole derivatives, has been developed.
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Affiliation(s)
- Yali Zhou
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Dengke Li
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Shi Tang
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Hongwei Sun
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Jinbo Huang
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
| | - Qiang Zhu
- State Key Laboratory of Respiratory Disease
- Guangzhou Institutes of Biomedicine and Health
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Guangzhou 510530
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155
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Banerjee S, Sreenithya A, Sunoj RB. Machine learning for predicting product distributions in catalytic regioselective reactions. Phys Chem Chem Phys 2018; 20:18311-18318. [DOI: 10.1039/c8cp03141j] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Machine learning tools are applied to analyse the regiochemical outcome of an important difluorination reaction.
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Affiliation(s)
- Sayan Banerjee
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- India
| | - A. Sreenithya
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- India
| | - Raghavan B. Sunoj
- Department of Chemistry
- Indian Institute of Technology Bombay
- Powai
- India
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156
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Zhu C, Wang CQ, Feng C. Recent advance in transition-metal-catalyzed oxidant-free 4+1 annulation through C–H bond activation. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.062] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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157
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Liang S, Hammond GB, Xu B. Hydrogen Bonding: Regulator for Nucleophilic Fluorination. Chemistry 2017; 23:17850-17861. [PMID: 28833711 PMCID: PMC5740003 DOI: 10.1002/chem.201702664] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Indexed: 11/07/2022]
Abstract
The recent advances in nucleophilic fluorination, regulated through hydrogen bonding interactions are summarized. Two main categories of fluorine nucleophiles are discussed. Alkali-metal fluorides are widely used in various fluorination transformations because they are inexpensive and safe nucleophilic fluorine sources. But the non-controllable nucleophilicity and strong basicity of some of them cause undesired side reactions, which led to the introduction of hydrogen bonding to fine tune their nucleophilicity and basicity. In contrast, an HF-based fluorine nucleophile, HF/DMPU, is in some aspects superior to the conventional HF/pyridine (Olah's reagent) or HF/Et3 N because of the higher hydrogen bond basicity of DMPU. It has been used in several nucleophilic fluorinations such as fluorination of alkynes, fluoro-Prins reaction and fluorination of aziridines.
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Affiliation(s)
- Shengzong Liang
- Department of Chemistry, University of Louisville, Louisville, Kentucky, 40292, USA
| | - Gerald B Hammond
- Department of Chemistry, University of Louisville, Louisville, Kentucky, 40292, USA
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Lu, Shanghai, 201620, P. R. China
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158
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Okada Y, Chiba K. Redox-Tag Processes: Intramolecular Electron Transfer and Its Broad Relationship to Redox Reactions in General. Chem Rev 2017; 118:4592-4630. [PMID: 29218989 DOI: 10.1021/acs.chemrev.7b00400] [Citation(s) in RCA: 114] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Explosive growth in the use of open shell reactivity, including neutral radicals and radical ions, in the field of synthetic organic chemistry has been observed in the past decade, particularly since the advent of ruthenium complexes in 2008. These complexes generally induce single-electron transfer (SET) processes via visible-light absorption. Additionally, recent significant advancements in organic electrochemistry involving SET processes to provide open shell reactivity offer a complementary method to traditional polarity-driven reactions described by two-electron transfer processes. In this Review, we highlight the importance of intramolecular SET processes in the field of synthetic organic chemistry, which seem to be more elusive than the intermolecular versions, since they are net redox-neutral and thus cannot simply be regarded as oxidations or reductions. Such intramolecular SET processes can rationally be understood in combination with concomitant bond formations and/or cleavages, and are regulated by a structural motif that we call a "redox tag." In order to describe modern radical-driven reactions involving SET processes, we focus on a classical formalism in which electrons are treated as particles rather than waves, which offers a practical yet powerful approach to explain and/or predict synthetic outcomes.
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Affiliation(s)
- Yohei Okada
- Department of Chemical Engineering , Tokyo University of Agriculture and Technology , 2-24-16 Naka-cho , Koganei, Tokyo 184-8588 , Japan
| | - Kazuhiro Chiba
- Department of Applied Biological Science , Tokyo University of Agriculture and Technology , 3-5-8 Saiwai-cho , Fuchu, Tokyo 183-8509 , Japan
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159
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Wang SE, He Q, Fan R. Iodobenzene-Catalyzed Ortho-Dearomatization and Aromatization-Triggered Rearrangement of 2-Allylanilines: Construction of Indolin-3-ylmethanols with High Diastereoselectivities. Org Lett 2017; 19:6478-6481. [DOI: 10.1021/acs.orglett.7b02986] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shuo-En Wang
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Qiuqin He
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
| | - Renhua Fan
- Department
of Chemistry, Fudan University, 220 Handan Road, Shanghai 200433, China
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160
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Kitamura T, Miyake A, Muta K, Oyamada AJ. Hypervalent Iodine/HF Reagents for the Synthesis of 3-Fluoropyrrolidines. J Org Chem 2017; 82:11721-11726. [PMID: 28695730 DOI: 10.1021/acs.joc.7b01266] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The intramolecular aminofluorination of homoallylamine derivatives using a reagent system of PhI(OAc)2 and Py·HF in CH2Cl2 at room temperature for 5 h gave N-tosyl-3-fluoropyrrolidines in good to high yields. Furthermore, the catalytic aminofluorination was furnished by the reaction using p-iodotoluene as a catalyst in the presence of Py·HF as a fluorine source and mCPBA as a terminal oxidant.
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Affiliation(s)
- Tsugio Kitamura
- Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University , Honjo-machi, Saga 840-8502, Japan
| | - Azusa Miyake
- Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University , Honjo-machi, Saga 840-8502, Japan
| | - Kensuke Muta
- Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University , Honjo-machi, Saga 840-8502, Japan
| | - And Juzo Oyamada
- Department of Chemistry and Applied Chemistry, Graduate School of Science and Engineering, Saga University , Honjo-machi, Saga 840-8502, Japan
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161
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Yoshimura A, Fuchs JM, Middleton KR, Maskaev AV, Rohde GT, Saito A, Postnikov PS, Yusubov MS, Nemykin VN, Zhdankin VV. Pseudocyclic Arylbenziodoxaboroles: Efficient Benzyne Precursors Triggered by Water at Room Temperature. Chemistry 2017; 23:16738-16742. [PMID: 28981177 DOI: 10.1002/chem.201704393] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Indexed: 11/12/2022]
Affiliation(s)
- Akira Yoshimura
- The Tomsk Polytechnic University 634050 Tomsk Russia
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | - Jonathan M. Fuchs
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | - Kyle R. Middleton
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | - Andrey V. Maskaev
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
| | | | - Akio Saito
- Division of Applied Chemistry, Institute of Engineering Tokyo University of Agriculture and Technology, 2–24-16 Naka-cho Koganei Tokyo 184-8588 Japan
| | | | | | - Victor N. Nemykin
- Department of Chemistry University of Manitoba Winnipeg MB R3T 2N2 Canada
| | - Viktor V. Zhdankin
- The Tomsk Polytechnic University 634050 Tomsk Russia
- Department of Chemistry and Biochemistry University of Minnesota Duluth MN 55812 USA
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162
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Geminal difluorination of α,α’- disubstituted styrenes using fluoro-benziodoxole reagent. Migration aptitude of the α-substituents. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.07.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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163
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Han YC, Zhang YD, Jia Q, Cui J, Zhang C. Hypervalent-Iodine-Mediated Ring-Contraction Monofluorination Affording Monofluorinated Five-Membered Ring-Fused Oxazolines. Org Lett 2017; 19:5300-5303. [DOI: 10.1021/acs.orglett.7b02479] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Yong-Chao Han
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Yan-Dong Zhang
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Qun Jia
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jian Cui
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Chi Zhang
- State Key Laboratory of Elemento-Organic
Chemistry, Collaborative Innovation Center of Chemical Science and
Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
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164
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Yusubov MS, Postnikov PS, Yusubova RY, Yoshimura A, Jürjens G, Kirschning A, Zhdankin VV. 2‐Iodoxybenzoic Acid Tosylates: the Alternative to Dess–Martin Periodinane Oxidizing Reagents. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700776] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Akira Yoshimura
- The Tomsk Polytechnic University 634050 Tomsk Russia
- Department of Chemistry Southern Methodist University Dallas, TX 75275 USA
| | - Gerrit Jürjens
- Institute for Medicinal Chemistry Helmholtz Zentrum München German Research Center for Environmental Health Schneiderberg 1b 30167 Hannover Germany
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ) Leibniz University Hannover Schneiderberg 1b 30167 Hannover Germany
| | - Andreas Kirschning
- Institute of Organic Chemistry and Center of Biomolecular Drug Research (BMWZ) Leibniz University Hannover Schneiderberg 1b 30167 Hannover Germany
| | - Viktor V. Zhdankin
- Department of Chemistry and Biochemistry University of Minnesota Duluth Duluth Minnesota 55812 USA
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165
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Liu Y, Huang D, Huang J, Maruoka K. Hypervalent Iodine Mediated Chemoselective Iodination of Alkynes. J Org Chem 2017; 82:11865-11871. [PMID: 28803465 DOI: 10.1021/acs.joc.7b01555] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Reported herein are practical approaches for the chemoselective mono-, di-, and tri-iodination of alkynes based on efficient oxidative iodinations catalyzed by hypervalent iodine reagents. The reaction conditions were systematically optimized by altering the iodine source and/or the hypervalent iodine reagent system. The tetrabutylammonium iodide (TBAI)/(diacetoxyiodo)benzene (PIDA) system is specific for monoiodination, while the KI/PIDA system results in di-iodination. Combining the TBAI/PIDA and KI/PIDA systems in one pot provided the corresponding tri-iodination products efficiently. These reaction conditions can be applied to the synthetically important iodination of aromatic and aliphatic alkynes, which was accomplished in good yield (up to 99%) and excellent chemoselectivity. These synthetic methods can also be applied to the efficient chemoselective synthesis of iodoalkyne derivatives, intermediates, and related biologically active compounds.
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Affiliation(s)
- Yan Liu
- School of Chemical Engineering and Light Industry, Guangdong University of Technology , No.100, West Waihuan Road, HEMC, Panyu District, Guangzhou 510006, China
| | - Daya Huang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology , No.100, West Waihuan Road, HEMC, Panyu District, Guangzhou 510006, China
| | - Ju Huang
- School of Chemical Engineering and Light Industry, Guangdong University of Technology , No.100, West Waihuan Road, HEMC, Panyu District, Guangzhou 510006, China
| | - Keiji Maruoka
- School of Chemical Engineering and Light Industry, Guangdong University of Technology , No.100, West Waihuan Road, HEMC, Panyu District, Guangzhou 510006, China.,Department of Chemistry, Graduate School of Science, Kyoto University , Sakyo, Kyoto 606-8502, Japan
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166
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Zhang M, Xi J, Ruzi R, Li N, Wu Z, Li W, Zhu C. Domino-Fluorination-Protodefluorination Enables Decarboxylative Cross-Coupling of α-Oxocarboxylic Acids with Styrene via Photoredox Catalysis. J Org Chem 2017; 82:9305-9311. [PMID: 28809563 DOI: 10.1021/acs.joc.7b01054] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Domino-fluorination-protodefluorination decarboxylative cross-coupling of α-keto acids with styrene has been developed via photoredox catalysis. The critical part of this strategy is the formation of the carbon-fluorine (C-F) bond by the capture of a carbon-centered radical intermediate, which will overcome side reactions during the styrene radical functionalization process. Experimental studies have provided evidence indicating a domino-fluorination-protodefluorination pathway with α-keto acid initiating the photoredox cycle. The present catalytic protocol also affords a novel approach for the construction of α,β-unsaturated ketones under mild conditions.
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Affiliation(s)
- Muliang Zhang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Junwei Xi
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Rehanguli Ruzi
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Nan Li
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Zhongkai Wu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Weipeng Li
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry , Shanghai 200032, China
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167
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Lübcke M, Yuan W, Szabó KJ. Trifluoromethylthiolation-Based Bifunctionalization of Diazocarbonyl Compounds by Rhodium Catalysis. Org Lett 2017; 19:4548-4551. [DOI: 10.1021/acs.orglett.7b02139] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Marvin Lübcke
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
- Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Weiming Yuan
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry, Stockholm University, SE-106 91 Stockholm, Sweden
- Stockholm Brain Institute, Karolinska Institutet, SE-171 77 Stockholm, Sweden
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168
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Sarie JC, Thiehoff C, Mudd RJ, Daniliuc CG, Kehr G, Gilmour R. Deconstructing the Catalytic, Vicinal Difluorination of Alkenes: HF-Free Synthesis and Structural Study of p-TolIF2. J Org Chem 2017; 82:11792-11798. [DOI: 10.1021/acs.joc.7b01671] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jérôme C. Sarie
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Christian Thiehoff
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Richard J. Mudd
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Constantin G. Daniliuc
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Gerald Kehr
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Ryan Gilmour
- Institute for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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169
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Zhao Z, Racicot L, Murphy GK. Fluorinative Rearrangements of Substituted Phenylallenes Mediated by (Difluoroiodo)toluene: Synthesis of α-(Difluoromethyl)styrenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706798] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zhensheng Zhao
- Department of Chemistry; University of Waterloo; 200 University Ave. W Waterloo ON N2L3G1 Canada
| | - Léanne Racicot
- Department of Chemistry; University of Waterloo; 200 University Ave. W Waterloo ON N2L3G1 Canada
| | - Graham K. Murphy
- Department of Chemistry; University of Waterloo; 200 University Ave. W Waterloo ON N2L3G1 Canada
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170
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Zhao Z, Racicot L, Murphy GK. Fluorinative Rearrangements of Substituted Phenylallenes Mediated by (Difluoroiodo)toluene: Synthesis of α-(Difluoromethyl)styrenes. Angew Chem Int Ed Engl 2017; 56:11620-11623. [DOI: 10.1002/anie.201706798] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Zhensheng Zhao
- Department of Chemistry; University of Waterloo; 200 University Ave. W Waterloo ON N2L3G1 Canada
| | - Léanne Racicot
- Department of Chemistry; University of Waterloo; 200 University Ave. W Waterloo ON N2L3G1 Canada
| | - Graham K. Murphy
- Department of Chemistry; University of Waterloo; 200 University Ave. W Waterloo ON N2L3G1 Canada
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171
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Zhao Z, Kulkarni KG, Murphy GK. Synthesis of Aryldihalomethanes by Denitrogenative Dihalogenation of Benzaldehyde Hydrazones. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700393] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Zhensheng Zhao
- Department of Chemistry; University of Waterloo; 200 University Ave W Waterloo, ON Canada N2L 3G1
| | - Kaivalya G. Kulkarni
- Department of Chemistry; University of Waterloo; 200 University Ave W Waterloo, ON Canada N2L 3G1
| | - Graham K. Murphy
- Department of Chemistry; University of Waterloo; 200 University Ave W Waterloo, ON Canada N2L 3G1
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172
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Yang JD, Wang Y, Xue XS, Cheng JP. A Systematic Evaluation of the N–F Bond Strength of Electrophilic N–F Reagents: Hints for Atomic Fluorine Donating Ability. J Org Chem 2017; 82:4129-4135. [DOI: 10.1021/acs.joc.7b00036] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jin-Dong Yang
- State
Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Ya Wang
- State
Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Xiao-Song Xue
- State
Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Jin-Pei Cheng
- State
Key Laboratory of Elemento-Organic Chemistry, Collaborative Innovation
Center of Chemical Science and Engineering, College of Chemistry, Nankai University, Tianjin 300071, China
- Center
of Basic Molecular Science, Department of Chemistry, Tsinghua University, Beijing 100084, China
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173
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Yang B, Chansaenpak K, Wu H, Zhu L, Wang M, Li Z, Lu H. Silver-promoted (radio)fluorination of unsaturated carbamates via a radical process. Chem Commun (Camb) 2017; 53:3497-3500. [PMID: 28280814 DOI: 10.1039/c7cc01393k] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The intramolecular fluorocyclization of unsaturated carbamates is described here using a hypervalent iodine reagent in the presence of a silver catalyst. Both (hetero)aryl-substituted olefins and acrylamides can be utilized as effective substrates. Preliminary mechanistic investigations suggest that the reaction proceeds via a cyclization/1,2-(hetero)aryl migration/fluorination cascade involving an unusual radical process. Furthermore, starting from no-carrier-added [18F]TBAF, a simple one-pot, two-step cascade method was developed for the generation of 18F-labeled heterocycles with high radiochemical purity.
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Affiliation(s)
- Bin Yang
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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174
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Theoretical study of Lewis acid activation models for hypervalent fluoroiodane reagent: The generality of “F-coordination” activation model. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.02.040] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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175
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Ma YN, Zhang X, Yang SD. Tandem Oxidative C−H Amination and Iodization to Synthesize Difunctional Atropoisomeric P-Stereogenic Phosphinamides. Chemistry 2017; 23:3007-3011. [DOI: 10.1002/chem.201700218] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Indexed: 01/05/2023]
Affiliation(s)
- Yan-Na Ma
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 73000 P.R. China
| | - Xi Zhang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 73000 P.R. China
| | - Shang-dong Yang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; Lanzhou 73000 P.R. China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Lanzhou Institute of Chemical Physics; Lanzhou 730000 P. R. China
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176
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Zhang J, Szabó KJ, Himo F. Metathesis Mechanism of Zinc-Catalyzed Fluorination of Alkenes with Hypervalent Fluoroiodine. ACS Catal 2017. [DOI: 10.1021/acscatal.6b02731] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Jiji Zhang
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Kálmán J. Szabó
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
| | - Fahmi Himo
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, 106 91 Stockholm, Sweden
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177
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Wang L, Jiang X, Tang P. Silver-mediated fluorination of alkyl iodides with TMSCF3 as the fluorinating agent. Org Chem Front 2017. [DOI: 10.1039/c7qo00450h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The first example of a silver-mediated fluorination of alkyl iodides with the Ruppert–Prakash reagent (TMSCF3) as the fluorinating agent is reported.
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Affiliation(s)
- Liyan Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
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178
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Ni M, Zhang J, Liang X, Jiang Y, Loh TP. Directed C–C bond cleavage of a cyclopropane intermediate generated fromN-tosylhydrazones and stable enaminones: expedient synthesis of functionalized 1,4-ketoaldehydes. Chem Commun (Camb) 2017; 53:12286-12289. [DOI: 10.1039/c7cc07178g] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An efficient method to construct functionalized 1,4-ketoaldehydes bearing all-carbon α-quaternary centersviaregioselective C–C bond activation has been described.
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Affiliation(s)
- Meiyan Ni
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Jianguo Zhang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Xiaoyu Liang
- Institute of Advanced Synthesis
- School of Chemistry and Molecular Engineering
- Jiangsu National Synergetic Innovation Center for Advanced Materials
- Nanjing Tech University
- Nanjing 211816
| | - Yaojia Jiang
- 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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179
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Zhou B, Yan T, Xue XS, Cheng JP. Mechanism of Silver-Mediated Geminal Difluorination of Styrenes with a Fluoroiodane Reagent: Insights into Lewis-Acid-Activation Model. Org Lett 2016; 18:6128-6131. [PMID: 27934395 DOI: 10.1021/acs.orglett.6b03134] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Fluorination mediated by the cyclic hypervalent fluoroiodane reagent (1) often requires an exogenous Lewis acid. The widely accepted Lewis-acid-activation model is that a given Lewis acid binds to the oxygen atom of 1 (O-coordination) to polarize the I-O bond. Computational studies of silver-mediated geminal difluorination of styrenes with 1 reveal a new "F-coordination" model that is energetically much preferred over the commonly accepted "O-coordination" model. The calculations rationalize the regioselective formation of the geminal difluorination product.
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Affiliation(s)
| | | | | | - Jin-Pei Cheng
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University , Beijing 100084, China
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180
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Molnár IG, Thiehoff C, Holland MC, Gilmour R. Catalytic, Vicinal Difluorination of Olefins: Creating a Hybrid, Chiral Bioisostere of the Trifluoromethyl and Ethyl Groups. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02155] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- István G. Molnár
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Christian Thiehoff
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Mareike C. Holland
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Ryan Gilmour
- Institute
for Organic Chemistry, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany
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181
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Yan T, Zhou B, Xue XS, Cheng JP. Mechanism and Origin of the Unexpected Chemoselectivity in Fluorocyclization of o-Styryl Benzamides with a Hypervalent Fluoroiodane Reagent. J Org Chem 2016; 81:9006-9011. [PMID: 27602695 DOI: 10.1021/acs.joc.6b01642] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The mechanism and origin of the unexpected chemoselectivity in fluorocyclization of o-styryl benzamide with a cyclic hypervalent fluoroiodane reagent were explored with DFT calculations. The calculations suggested an alternative mechanism that is broadly similar to, but also critically different from, the previously proposed mechanism for the formation of an unexpected structurally novel seven-membered 4-fluoro-1,3-benzoxazepine. The amide group of o-styryl benzamide was revealed to be crucial for activating the fluoroiodane reagent and facilitating C-F bond formation. In contrast to the popular electrophilic N-F reagent Selectfluor, the F atom in the fluoroiodane reagent is nucleophilic, and the I(III) atom is the most electrophilic site, thus inducing a completely different reactivity pattern. The insights reported here will be valuable for the further development of new reactions based on the hypervalent fluoroiodane reagent.
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Affiliation(s)
| | | | | | - Jin-Pei Cheng
- Center of Basic Molecular Science, Department of Chemistry, Tsinghua University , Beijing 100084, China
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