1
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Knuplez T, Schneider LN, Preitschopf T, Bejaoui YKJ, Zapf L, Schopper N, Maibom KAM, Sprenger JAP, Gehrke F, Lorenzen S, Graf R, Bertermann R, Fischer I, Ignat'ev NV, Finze M. Synthesis of Partially Fluorinated Alkyl Triflates by Electrochemical Fluorination (Simons Process). Chemistry 2023; 29:e202302701. [PMID: 37615512 DOI: 10.1002/chem.202302701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 08/24/2023] [Accepted: 08/24/2023] [Indexed: 08/25/2023]
Abstract
A scalable straightforward synthesis of monofluoro- and difluoromethyl triflate CF3 SO2 OCH2 F (MH2F ) and CF3 SO2 OCHF2 (MHF2 ) through electrochemical fluorination (ECF, Simons process) of methyl triflate MH3 in anhydrous hydrogen fluoride at nickel anodes is presented. The ECF method is also feasible for the preparation of the deuterated analogues CF3 SO2 OCD2 F (MD2F ) and CF3 SO2 OCDF2 (MD2F ). Surprisingly, no H/D exchange occurs during ECF of CF3 SO2 OCD3 (MD3 ); this provides further evidence for a NiF3 /NiF4 -mediated ECF mechanism. The ECF of selected partially fluorinated ethyl triflates is described, and electrochemical fluorination of CF3 SO2 OCH2 CF3 (EH2F3 ) leads to the until now unknown chiral CF3 SO2 OCHFCF3 (EHFF3 ). The analogous fluoromethyl and fluoroethyl nonaflates are also accessible by ECF. This study contains detailed spectroscopic, structural, and thermal data on (fluoro)methyl and fluoro(ethyl) triflates.
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Affiliation(s)
- Tanja Knuplez
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Leon N Schneider
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Tobias Preitschopf
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Younes K J Bejaoui
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ludwig Zapf
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Nils Schopper
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Kristina A M Maibom
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Jan A P Sprenger
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Franziska Gehrke
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Sabine Lorenzen
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Roland Graf
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Rüdiger Bertermann
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Ingo Fischer
- Institut für Physikalische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Nikolai V Ignat'ev
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
- Consultant, Merck Life Science KGaA, 64293, Darmstadt, Germany
| | - Maik Finze
- Institut für nachhaltige Chemie & Katalyse mit Bor (ICB) Institut für Anorganische Chemie, Julius-Maximimilians-Universität Würzburg, Am Hubland, 97074, Würzburg, Germany
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Bonnefoy C, Panossian A, Hanquet G, Leroux FR, Toulgoat F, Billard T. Comprehensive Study and Development of a Metal-Free and Mild Nucleophilic Trifluoromethoxylation. Chemistry 2023; 29:e202301513. [PMID: 37278564 DOI: 10.1002/chem.202301513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/02/2023] [Accepted: 06/06/2023] [Indexed: 06/07/2023]
Abstract
Among the general interest in fluorinated compounds, trifluoromethoxylated molecules play a specific role. However, despite this interest, the development of efficient reagents to perform trifluoromethoxylation reactions remains a challenge. Here, 2,4-dinitro-trifluoromethoxybenzene (DNTFB) is used as a trifluoromethoxylating reagent to perform nucleophilic substitution under mild metal-free conditions with different leaving groups, including direct dehydroxytrifluoromethoxylation. A mechanistic study rationalized the reaction and subsequently proposed only three reaction conditions, depending on the reactivity of the starting substrates.
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Affiliation(s)
- Clémence Bonnefoy
- Institute of Chemistry and Biochemistry (ICBMS - UMR CNRS 5246), Univ Lyon, CNRS, Université Lyon 1, CPE Lyon, 1 rue Victor Grignard, 69622, Lyon, France
| | - Armen Panossian
- Université de Strasbourg, Université de Haute-Alsace, CNRS, UMR 7042-LIMA, ECPM, 67000, Strasbourg, France
| | - Gilles Hanquet
- Université de Strasbourg, Université de Haute-Alsace, CNRS, UMR 7042-LIMA, ECPM, 67000, Strasbourg, France
| | - Frédéric R Leroux
- Université de Strasbourg, Université de Haute-Alsace, CNRS, UMR 7042-LIMA, ECPM, 67000, Strasbourg, France
| | - Fabien Toulgoat
- Institute of Chemistry and Biochemistry (ICBMS - UMR CNRS 5246), Univ Lyon, CNRS, Université Lyon 1, CPE Lyon, 1 rue Victor Grignard, 69622, Lyon, France
- CPE Lyon, Campus LyonTech-La Doua, 43 Bd du 11 novembre 1918, 69616, Villeurbanne, France
| | - Thierry Billard
- Institute of Chemistry and Biochemistry (ICBMS - UMR CNRS 5246), Univ Lyon, CNRS, Université Lyon 1, CPE Lyon, 1 rue Victor Grignard, 69622, Lyon, France
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3
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Kang Q, Li Q, Wang L, Jia Y, Zhang X, Hu J. Comment on "Suspect and Nontarget Screening of Per- and Polyfluoroalkyl Substances in Wastewater from a Fluorochemical Manufacturing Park". ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:5589-5592. [PMID: 33779154 DOI: 10.1021/acs.est.0c06917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Qiyue Kang
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Qiang Li
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Lei Wang
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Yingting Jia
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Xiaohua Zhang
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Jianying Hu
- MOE Laboratory for Earth Surface Process, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
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4
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Yu N, Wang X, Li Y, Jiao Z, Wei S. Response to Comment on "Suspect and Nontarget Screening of Per- and Polyfluoroalkyl Substances in Wastewater from a Fluorochemical Manufacturing Park". ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:5593-5596. [PMID: 33783195 DOI: 10.1021/acs.est.1c01254] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Nanyang Yu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
| | - Xuebing Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
| | - Yuqian Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
| | - Zhaoyu Jiao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
| | - Si Wei
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
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Bentel MJ, Yu Y, Xu L, Kwon H, Li Z, Wong BM, Men Y, Liu J. Degradation of Perfluoroalkyl Ether Carboxylic Acids with Hydrated Electrons: Structure-Reactivity Relationships and Environmental Implications. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2020; 54:2489-2499. [PMID: 31999101 DOI: 10.1021/acs.est.9b05869] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study explores structure-reactivity relationships for the degradation of emerging perfluoroalkyl ether carboxylic acid (PFECA) pollutants with ultraviolet-generated hydrated electrons (eaq-). The rate and extent of PFECA degradation depend on both the branching extent and the chain length of oxygen-segregated fluoroalkyl moieties. Kinetic measurements, theoretical calculations, and transformation product analyses provide a comprehensive understanding of the PFECA degradation mechanisms and pathways. In comparison to traditional full-carbon-chain perfluorocarboxylic acids, the distinct degradation behavior of PFECAs is attributed to their ether structures. The ether oxygen atoms increase the bond dissociation energy of the C-F bonds on the adjacent -CF2- moieties. This impact reduces the formation of H/F-exchanged polyfluorinated products that are recalcitrant to reductive defluorination. Instead, the cleavage of ether C-O bonds generates unstable perfluoroalcohols and thus promotes deep defluorination of short fluoroalkyl moieties. In comparison to linear PFECAs, branched PFECAs have a higher tendency of H/F exchange on the tertiary carbon and thus lower percentages of defluorination. These findings provide mechanistic insights for an improved design and efficient degradation of fluorochemicals.
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Affiliation(s)
- Michael J Bentel
- Department of Chemical & Environmental Engineering , University of California, Riverside , Riverside , California 92521 , United States
| | - Yaochun Yu
- Department of Civil & Environmental Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Lihua Xu
- Department of Chemical & Environmental Engineering , University of California, Riverside , Riverside , California 92521 , United States
| | - Hyuna Kwon
- Department of Chemical & Environmental Engineering , University of California, Riverside , Riverside , California 92521 , United States
| | - Zhong Li
- Metabolomics Lab of Roy J. Carver Biotechnology Center , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Bryan M Wong
- Department of Chemical & Environmental Engineering , University of California, Riverside , Riverside , California 92521 , United States
- Materials Science & Engineering Program , University of California, Riverside , Riverside , California 92521 , United States
| | - Yujie Men
- Department of Chemical & Environmental Engineering , University of California, Riverside , Riverside , California 92521 , United States
- Department of Civil & Environmental Engineering , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
- Institute for Genomic Biology , University of Illinois at Urbana-Champaign , Urbana , Illinois 61801 , United States
| | - Jinyong Liu
- Department of Chemical & Environmental Engineering , University of California, Riverside , Riverside , California 92521 , United States
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6
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Lee JW, Lee KN, Ngai MY. Synthesis of Tri- and Difluoromethoxylated Compounds by Visible-Light Photoredox Catalysis. Angew Chem Int Ed Engl 2019; 58:11171-11181. [PMID: 30943329 PMCID: PMC7001783 DOI: 10.1002/anie.201902243] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Indexed: 01/29/2023]
Abstract
Trifluoromethoxy (OCF3 ) and difluoromethoxy (OCF2 H) groups are fluorinated structural motifs that exhibit unique physicochemical characteristics. Incorporation of these substituents into organic molecules is a highly desirable approach used in medicinal chemistry and drug discovery processes to alter the properties of a parent compound. Recently, tri- and difluoromethyl ethers have received increasing attention and several innovative strategies to access these valuable functional groups have been developed. The focus of this Minireview is the use of visible-light photoredox catalysis in the synthesis of tri- and difluoromethyl ethers. Recent photocatalytic strategies for the formation of O-CF3 , C-OCF3, O-CF2 H, and C-OCF2 H bonds as well as other transformations leading to the construction of ORF groups are discussed herein.
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Affiliation(s)
- Johnny W Lee
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Katarzyna N Lee
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Ming-Yu Ngai
- Department of Chemistry and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, 11794, USA
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7
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Lee JW, Lee KN, Ngai M. Synthesis of Tri‐ and Difluoromethoxylated Compounds by Visible‐Light Photoredox Catalysis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Johnny W. Lee
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryStony Brook University Stony Brook NY 11794 USA
| | - Katarzyna N. Lee
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryStony Brook University Stony Brook NY 11794 USA
| | - Ming‐Yu Ngai
- Department of Chemistry and Institute of Chemical Biology and Drug DiscoveryStony Brook University Stony Brook NY 11794 USA
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8
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Baxter AF, Schaab J, Hegge J, Saal T, Vasiliu M, Dixon DA, Haiges R, Christe KO. α‐Fluoroalcohols: Synthesis and Characterization of Perfluorinated Methanol, Ethanol and
n
‐Propanol, and their Oxonium Salts. Chemistry 2018; 24:16737-16742. [DOI: 10.1002/chem.201804306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Amanda F. Baxter
- University of Southern California Loker Research Institute LHI 106 837 Bloom Walk Los Angeles California 90089-1661 USA
| | - Jonas Schaab
- University of Southern California Loker Research Institute LHI 106 837 Bloom Walk Los Angeles California 90089-1661 USA
| | - Joachim Hegge
- University of Southern California Loker Research Institute LHI 106 837 Bloom Walk Los Angeles California 90089-1661 USA
| | - Thomas Saal
- University of Southern California Loker Research Institute LHI 106 837 Bloom Walk Los Angeles California 90089-1661 USA
| | - Monica Vasiliu
- University of Alabama Department of Chemistry & Biochemistry Tuscaloosa Alabama 35487 USA
| | - David A. Dixon
- University of Alabama Department of Chemistry & Biochemistry Tuscaloosa Alabama 35487 USA
| | - Ralf Haiges
- University of Southern California Loker Research Institute LHI 106 837 Bloom Walk Los Angeles California 90089-1661 USA
| | - Karl O. Christe
- University of Southern California Loker Research Institute LHI 106 837 Bloom Walk Los Angeles California 90089-1661 USA
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9
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Baxter AF, Schaab J, Christe KO, Haiges R. Perfluoroalcohols: The Preparation and Crystal Structures of Heptafluorocyclobutanol and Hexafluorocyclobutane-1,1-diol. Angew Chem Int Ed Engl 2018; 57:8174-8177. [PMID: 29719108 DOI: 10.1002/anie.201804101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 11/07/2022]
Abstract
The first X-ray crystal structure of an α-fluoroalcohol is reported. Heptafluorocyclobutanol was obtained in quantitative yield from hexafluorocyclobutanone by HF addition in anhydrous hydrogen fluoride. The compound was characterized by its X-ray single crystal structure. Heptafluorocyclobutanol readily undergoes hydrolysis to hexafluorocyclobutane-1,1-diol, which was also structurally characterized by X-ray diffraction.
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Affiliation(s)
- Amanda F Baxter
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA, 90089-1661, USA
| | - Jonas Schaab
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA, 90089-1661, USA
| | - Karl O Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA, 90089-1661, USA
| | - Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA, 90089-1661, USA
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10
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Perfluoroalcohols: The Preparation and Crystal Structures of Heptafluorocyclobutanol and Hexafluorocyclobutane‐1,1‐diol. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Schaab J, Schwab M, Kratzert D, Schwabedissen J, Stammler HG, Mitzel NW, Krossing I. The perfluorinated alcohols c-C 6F 11OH, c-C 6F 10-1,1-(OH) 2 and c-C 6F 10-1-(CF 3)OH. Chem Commun (Camb) 2018; 54:9294-9297. [DOI: 10.1039/c8cc05148h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermally unstable α-fluoroalcohol undecafluorocyclohexanol (c-C6F11OH) was prepared by addition of hydrogen fluoride to the corresponding ketone.
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Affiliation(s)
- Jonas Schaab
- Albert-Ludwigs-Universität Freiburg
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum FMF
- D-79104 Freiburg
- Germany
| | - Miriam Schwab
- Albert-Ludwigs-Universität Freiburg
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum FMF
- D-79104 Freiburg
- Germany
| | - Daniel Kratzert
- Albert-Ludwigs-Universität Freiburg
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum FMF
- D-79104 Freiburg
- Germany
| | - Jan Schwabedissen
- Universität Bielefeld
- Lehrstuhl für Anorganische und Strukturchemie
- Centrum für Molekulare Materialien
- D-33615 Bielefeld
- Germany
| | - Hans-Georg Stammler
- Universität Bielefeld
- Lehrstuhl für Anorganische und Strukturchemie
- Centrum für Molekulare Materialien
- D-33615 Bielefeld
- Germany
| | - Norbert W. Mitzel
- Universität Bielefeld
- Lehrstuhl für Anorganische und Strukturchemie
- Centrum für Molekulare Materialien
- D-33615 Bielefeld
- Germany
| | - Ingo Krossing
- Albert-Ludwigs-Universität Freiburg
- Institut für Anorganische und Analytische Chemie and Freiburger Materialforschungszentrum FMF
- D-79104 Freiburg
- Germany
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12
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Wang F, Zhang T, Tu HY, Zhang XG. Transition-Metal-Free Conversion of Trifluoropropanamides into Cyanoformamides through C–CF3 Bond Cleavage and Nitrogenation. J Org Chem 2017; 82:5475-5480. [DOI: 10.1021/acs.joc.7b00626] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fang Wang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Tao Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Hai-Yong Tu
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
| | - Xing-Guo Zhang
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China
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13
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Lee KN, Lei Z, Morales-Rivera CA, Liu P, Ngai MY. Mechanistic studies on intramolecular C-H trifluoromethoxylation of (hetero)arenes via OCF3-migration. Org Biomol Chem 2016; 14:5599-605. [PMID: 27043815 PMCID: PMC4909548 DOI: 10.1039/c6ob00132g] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The one-pot two-step intramolecular aryl and heteroaryl C-H trifluoromethoxylation recently reported by our group has provided a general, scalable, and operationally simple approach to access a wide range of unprecedented and valuable OCF3-containing building blocks. Herein we describe our investigations to elucidate its reaction mechanism. Experimental data indicate that the O-trifluoromethylation of N-(hetero)aryl-N-hydroxylamine derivatives is a radical process, whereas the OCF3-migration step proceeds via a heterolytic cleavage of the N-OCF3 bond followed by rapid recombination of a short-lived ion pair. Computational studies further support the proposed ion pair reaction pathway for the OCF3-migration process. We hope that the current study would provide useful insights for the development of new transformations using versatile N-(hetero)aryl-N-hydroxylamine synthons.
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Affiliation(s)
- Katarzyna N Lee
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA. and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, New York 11794-3400, USA
| | - Zhen Lei
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA. and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, New York 11794-3400, USA
| | | | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, USA
| | - Ming-Yu Ngai
- Department of Chemistry, Stony Brook University, Stony Brook, New York 11794-3400, USA. and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, New York 11794-3400, USA
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14
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Baxter AF, Christe KO, Haiges R. Convenient Access to α‐Fluorinated Alkylammonium Salts. Angew Chem Int Ed Engl 2015; 54:14535-8. [DOI: 10.1002/anie.201507177] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Amanda F. Baxter
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Karl O. Christe
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
| | - Ralf Haiges
- Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, CA 90089‐1661 (USA)
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Baxter AF, Christe KO, Haiges R. Einfacher Zugang zu α-Fluoralkylammoniumsalzen. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507177] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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16
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Jelier BJ, Howell JL, Montgomery CD, Leznoff DB, Friesen CM. A Convenient Route to Tetraalkylammonium Perfluoroalkoxides from Hydrofluoroethers. Angew Chem Int Ed Engl 2015; 54:2945-9. [DOI: 10.1002/anie.201410639] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 12/10/2014] [Indexed: 12/18/2022]
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17
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Jelier BJ, Howell JL, Montgomery CD, Leznoff DB, Friesen CM. A Convenient Route to Tetraalkylammonium Perfluoroalkoxides from Hydrofluoroethers. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201410639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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18
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Martínez-Salvador S, Forniés J, Martín A, Menjón B, Usón I. Stepwise Degradation of Trifluoromethyl Platinum(II) Compounds. Chemistry 2012; 19:324-37. [DOI: 10.1002/chem.201202648] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Indexed: 11/07/2022]
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Zhang CP, Vicic DA. Oxygen-Bound Trifluoromethoxide Complexes of Copper and Gold. Organometallics 2012. [DOI: 10.1021/om3002747] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cheng-Pan Zhang
- Department of Chemistry, University of Hawaii, 2545 McCarthy
Mall, Honolulu, Hawaii 96822, United States
| | - David A. Vicic
- Department of Chemistry, University of Hawaii, 2545 McCarthy
Mall, Honolulu, Hawaii 96822, United States
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Gerken M, Moran MD, Mercier HPA, Pointner BE, Schrobilgen GJ, Hoge B, Christe KO, Boatz JA. On the XeF+/H2O System: Synthesis and Characterization of the Xenon(II) Oxide Fluoride Cation, FXeOXeFXeF+. J Am Chem Soc 2009; 131:13474-89. [DOI: 10.1021/ja905060v] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael Gerken
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Matthew D. Moran
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Hélène P. A. Mercier
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Bernard E. Pointner
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Gary J. Schrobilgen
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Berthold Hoge
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Karl O. Christe
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
| | - Jerry A. Boatz
- Department of Chemistry, McMaster University, Hamilton ON L8S 4M1, Canada, Loker Hydrocarbon Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089, and Air Force Research Laboratory, Edwards Air Force Base, California 93524
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Selective aromatic carbon–oxygen bond cleavage of trifluoromethoxyarenes: a trifluoromethoxy group as a convertible directing group. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2008.08.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Matus MH, Nguyen MT, Dixon DA, Christe KO. Thermochemical Parameters of CHFO and CF2O. J Phys Chem A 2008; 112:4973-81. [DOI: 10.1021/jp800103y] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Myrna H. Matus
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, California 90089-1661
| | - Minh Tho Nguyen
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, California 90089-1661
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, California 90089-1661
| | - Karl O. Christe
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, California 90089-1661
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Nguyen MT, Matus MH, Ngan VT, Haiges R, Christe KO, Dixon DA. Energetics and Mechanism of the Decomposition of Trifluoromethanol. J Phys Chem A 2008; 112:1298-312. [DOI: 10.1021/jp709796n] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Minh Tho Nguyen
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Myrna H. Matus
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Vu Thi Ngan
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Ralf Haiges
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - Karl O. Christe
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
| | - David A. Dixon
- Department of Chemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, Department of Chemistry, University of Leuven, B-3001 Leuven, Belgium, and Loker Research Institute and Department of Chemistry, University of Southern California, Los Angeles, California 90089-1661
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Grzybowska D, Malinowski P, Mazej Z, Grochala W. Probing the Reactivity of the Potent AgF2 Oxidizer. Part 1: Organic Compounds. ACTA ACUST UNITED AC 2008. [DOI: 10.1135/cccc20081729] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The reactivity of Ag(II)F2 towards a variety of organic compounds of a high degree of fluorination has been investigated. AgF2 readily fluorinates P(C6F5)3 to PF2(C6F5)3, and attacks the isothiocyanate functional group, -NCS, yielding Ag2S. Perfluorinated aliphatic nitriles resist the action of AgF2, but aromatic C6F5CN undergoes a radical-initiated oligomerization; byproducts include C6F6CN• and C6F5N2• (after intramolecular rearrangement following the bimolecular reaction). AgF2 oxidizes higher fluorosulfonic acids (C4F9SO3H, C8F17SO3H) at or close to the room temperature and triflic acid (CF3SO3H) at its boiling point to the corresponding peroxides. CF3COOH and CF3CONH2 are also decomposed in redox reactions, but the gaseous products have not been identified. Surprisingly, AgF2 is kinetically inert to perfluorinated aromatic hydrocarbons and to CCl4, but it decomposes CBr4 with vigorous elimination of Br2. CI4 decomposes explosively in the presence of AgF2. C6F5OH and CF3COOH are readily oxidized with AgF2 but, surprisingly, t-C4F9OH is kinetically resistant under similar conditions. Coordination complexes of perfluorinated aza and oxa Lewis bases (including perfluorinated 15-crown-5 ether) and AgF2 are not formed under the experimental conditions.
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