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Vesseur D, Li S, Mallet-Ladeira S, Miqueu K, Bourissou D. Ligand-Enabled Oxidative Fluorination of Gold(I) and Light-Induced Aryl-F Coupling at Gold(III). J Am Chem Soc 2024. [PMID: 38607393 DOI: 10.1021/jacs.4c00913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
MeDalphos Au(I) complexes featuring aryl, alkynyl, and alkyl groups readily react with electrophilic fluorinating reagents such as N-fluorobenzenesulfonimide and Selectfluor. The ensuing [(MeDalphos)Au(R)F]+ complexes have been isolated and characterized by multinuclear NMR spectroscopy as well as X-ray diffraction. They adopt a square-planar contra-thermodynamic structure, with F trans to N. DFT/IBO calculations show that the N lone pair of MeDalphos assists and directs the transfer of F+ to gold. The [(MeDalphos)Au(Ar)F]+ (Ar = Mes, 2,6-F2Ph) complexes smoothly engage in C-C cross-coupling with PhCCSiMe3 and Me3SiCN, providing direct evidence for the oxidative fluorination/transmetalation/reductive elimination sequence proposed for F+-promoted gold-catalyzed transformations. Moreover, direct reductive elimination to forge a C-F bond at Au(III) was explored and substantiated. Thermal means proved unsuccessful, leading mostly to decomposition, but irradiation with UV-visible light enabled efficient promotion of aryl-F coupling (up to 90% yield). The light-induced reductive elimination proceeds under mild conditions; it works even with the electron-deprived 2,6-difluorophenyl group, and it is not limited to the contra-thermodynamic form of the aryl Au(III) fluoride complexes.
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Affiliation(s)
- David Vesseur
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA, UMR 5069) , CNRS/Université Paul Sabatier , 118 Route de Narbonne, 31062 Toulouse, Cedex 09, France
| | - Shuo Li
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA, UMR 5069) , CNRS/Université Paul Sabatier , 118 Route de Narbonne, 31062 Toulouse, Cedex 09, France
| | - Sonia Mallet-Ladeira
- Institut de Chimie de Toulouse (UAR 2599) , 118 Route de Narbonne, 31062 Toulouse, Cedex 09, France
| | - Karinne Miqueu
- E2S-UPPA, Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux (IPREM, UMR 5254), CNRS/Université de Pau et des Pays de l'Adour, Hélioparc, 2 Avenue du Président Angot, 64053 Pau, Cedex 09, France
| | - Didier Bourissou
- Laboratoire Hétérochimie Fondamentale et Appliquée (LHFA, UMR 5069) , CNRS/Université Paul Sabatier , 118 Route de Narbonne, 31062 Toulouse, Cedex 09, France
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2
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Michelet V, Marsicano V, Arcadi A. Gold‐Catalyzed Regioselective Oxyfluorination / Oxydifluorination vs. Diketonization of Phthalimido‐Protected Propargylamines with Selectfluor. European J Org Chem 2021. [DOI: 10.1002/ejoc.202101524] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Veronique Michelet
- University of Cote d'Azur: Universite de Nice Sophia Antipolis CHEMISTRY Parc Valrose 06100 NICE FRANCE
| | - Vincenzo Marsicano
- Nice University: Universite de Nice Sophia Antipolis Chemistry Parc Valrose FRANCE
| | - Antonio Arcadi
- University of L'Aquila Department of Physical and Chemical Sciences: Universita degli Studi dell'Aquila Dipartimento di Scienze Fisiche e Chimiche Chemistry L'Aquila ITALY
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3
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Gauthier R, Tzouras NV, Zhang Z, Bédard S, Saab M, Falivene L, Van Hecke K, Cavallo L, Nolan SP, Paquin JF. Gold N-Heterocyclic Carbene Catalysts for the Hydrofluorination of Alkynes Using Hydrofluoric Acid: Reaction Scope, Mechanistic Studies and the Tracking of Elusive Intermediates. Chemistry 2021; 28:e202103886. [PMID: 34739142 DOI: 10.1002/chem.202103886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Indexed: 11/07/2022]
Abstract
An efficient and chemoselective methodology deploying gold-N-heterocyclic carbene (NHC) complexes as catalysts in the hydrofluorination of terminal alkynes using aqueous HF has been developed. Mechanistic studies shed light on an in situ generated catalyst, formed by the reaction of Brønsted basic gold pre-catalysts with HF in water, which exhibits the highest reactivity and chemoselectivity. The catalytic system has a wide alkyl substituted-substrate scope, and stoichiometric as well as catalytic reactions with tailor-designed gold pre-catalysts enable the identification of various gold species involved along the catalytic cycle. Computational studies aid in understanding the chemoselectivity observed through examination of key mechanistic steps for phosphine- and NHC-coordinated gold species bearing the triflate counterion and the elusive key complex bearing a bifluoride counterion.
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Affiliation(s)
- Raphaël Gauthier
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Nikolaos V Tzouras
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Ziyun Zhang
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Sandrine Bédard
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Marina Saab
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Laura Falivene
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Kristof Van Hecke
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Luigi Cavallo
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Steven P Nolan
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Jean-François Paquin
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, G1V 0A6, Canada
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4
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Gauthier R, Mamone M, Paquin JF. Gold-Catalyzed Hydrofluorination of Internal Alkynes Using Aqueous HF. Org Lett 2019; 21:9024-9027. [PMID: 31663758 DOI: 10.1021/acs.orglett.9b03425] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The gold-catalyzed hydrofluorination reaction of internal alkynes using hydrofluoric acid is reported. Notably, those conditions use one of the most economical sources of HF and are free of additional additives. Both symmetrical and unsymmetrical internal alkynes can be utilized, and the use of alkynes bearing a fluorinated group at the propargylic position as substrates allowed for a regioselective hydrofluorination reaction.
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Affiliation(s)
- Raphaël Gauthier
- CCVC, PROTEO, Département de chimie , Université Laval , 1045 Avenue de la Médecine , Québec , Québec G1V 0A6 , Canada
| | - Marius Mamone
- CCVC, PROTEO, Département de chimie , Université Laval , 1045 Avenue de la Médecine , Québec , Québec G1V 0A6 , Canada
| | - Jean-François Paquin
- CCVC, PROTEO, Département de chimie , Université Laval , 1045 Avenue de la Médecine , Québec , Québec G1V 0A6 , Canada
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5
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Praveen C. Carbophilic activation of π-systems via gold coordination: Towards regioselective access of intermolecular addition products. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.04.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Praveen C. Dexterity of gold catalysis in controlling the regioselectivity of cycloaddition reactions. CATALYSIS REVIEWS-SCIENCE AND ENGINEERING 2019. [DOI: 10.1080/01614940.2019.1594016] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Chandrasekar Praveen
- Materials Electrochemistry Division, Central Electrochemical Research Institute (CSIR Laboratory), Karaikudi, Tamil Nadu, India
- Academy of Scientific and Innovative Research (AcSIR), Central Electrochemical Research Institute (CSIR Laboratory), Karaikudi, Tamil Nadu, India
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7
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O’Connor TJ, Toste FD. Gold-Catalyzed Hydrofluorination of Electron-Deficient Alkynes: Stereoselective Synthesis of β-Fluoro Michael Acceptors. ACS Catal 2018; 8:5947-5951. [PMID: 31763055 DOI: 10.1021/acscatal.8b01341] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The gold(I)-catalyzed, stereoselective hydrofluorination of electron-deficient alkynes with triethylamine trihydrogen fluoride (Et3N·3HF) is described. Fluorinated α,β-unsaturated aldehydes, amides, esters, ketones, and nitriles were isolated in moderate to good yields as single diastereomers. In all but four cases, the (Z)-vinyl fluorides were initially formed in ≥97% diastereoselectivity. This work constitutes the first catalytic example of the diastereoselective preparation of a variety of β-alkyl, β-fluoro Michael acceptors from alkynes. Additionally, the described work expands access to β-aryl, β-fluoro Michael acceptors to the synthesis of β-fluoro-α,β-unsaturated amides and nitriles. The monofluoroalkenes formed through this strategy were readily transformed into other fluorine-containing compounds, and the developed method was applied to the synthesis of a fluorinated analogue of Exoderil, a topical antimycotic.
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Affiliation(s)
- Thomas J. O’Connor
- Department of Chemistry, University of California, Berkeley, California 04720, United States
| | - F. Dean Toste
- Department of Chemistry, University of California, Berkeley, California 04720, United States
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8
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Zeng X, Liu S, Hammond GB, Xu B. Divergent Regio- and Stereoselective Gold-catalyzed Synthesis of α-Fluorosulfones and β-Fluorovinylsulfones from Alkynylsulfones. Chemistry 2017; 23:11977-11981. [PMID: 28736856 DOI: 10.1002/chem.201703179] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Indexed: 11/08/2022]
Abstract
We developed a widely applicable, highly efficient synthesis of α-fluorosulfone and β-fluorovinylsulfone catalyzed by gold. Starting with alkynyl sulfone 1, an [Au]/HF/N-oxide system gives α-fluorosulfone 3 via a gold carbene intermediate, and, if no N-oxide is used, direct addition of HF to 1 gives vinyl sulfone 4 via a vinylfluoro gold intermediate. Both methods have good functional group tolerance and the reactions can be conducted in ambient atmosphere.
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Affiliation(s)
- Xiaojun Zeng
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| | - Shiwen Liu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| | - Gerald B Hammond
- Department of Chemistry, University of Louisville, Louisville, KY, 40292, USA
| | - Bo Xu
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
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9
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Kumar R, Linden A, Nevado C. Evidence for Direct Transmetalation of AuIII–F with Boronic Acids. J Am Chem Soc 2016; 138:13790-13793. [DOI: 10.1021/jacs.6b07763] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Roopender Kumar
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, Zurich CH 8057, Switzerland
| | - Anthony Linden
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, Zurich CH 8057, Switzerland
| | - Cristina Nevado
- Department of Chemistry, University of Zurich, Winterthurerstrasse
190, Zurich CH 8057, Switzerland
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10
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Affiliation(s)
- Javier Miró
- Department of Organic Chemistry,
Faculty of Pharmacy, University of Valencia, 46100 Burjassot,
Valencia, Spain
| | - Carlos del Pozo
- Department of Organic Chemistry,
Faculty of Pharmacy, University of Valencia, 46100 Burjassot,
Valencia, Spain
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11
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Kumar R, Linden A, Nevado C. Luminescent (N^C^C) Gold(III) Complexes: Stabilized Gold(III) Fluorides. Angew Chem Int Ed Engl 2015; 54:14287-90. [PMID: 26439538 DOI: 10.1002/anie.201505533] [Citation(s) in RCA: 92] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Indexed: 11/06/2022]
Abstract
We report the design, synthesis, and application of a (N^C^C)-ligand framework able to stabilize highly electron-deprived gold(III) species. This novel platform enabled the preparation of C(sp(2))-gold(III) fluorides for the first time in monomeric, easy-to-handle, bench-stable form by a Cl/F ligand-exchange reaction. Devoid of oxidative conditions or stoichiometric use of toxic Hg salts, this method was applied to the preparation of multiple [C(sp(2))-Au(III)-F] complexes, which were used as mechanistic probes for the study of the unique properties and intrinsic reactivity of Au-F bonds. The improved photophysical properties of [(N^C^C)Au(III)] complexes compared to classical pincer (C^N^C)-Au systems paves the way for the design of new late-transition-metal-based OLEDs.
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Affiliation(s)
- Roopender Kumar
- Department of Chemistry, University of Zürich, Winterthurerstrasse 180, 8057 Zürich (Switzerland)
| | - Anthony Linden
- Department of Chemistry, University of Zürich, Winterthurerstrasse 180, 8057 Zürich (Switzerland)
| | - Cristina Nevado
- Department of Chemistry, University of Zürich, Winterthurerstrasse 180, 8057 Zürich (Switzerland).
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12
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Kumar R, Linden A, Nevado C. Luminescent (N^C^C) Gold(III) Complexes: Stabilized Gold(III) Fluorides. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505533] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Geng C, Zhu R, Li M, Lu T, Wheeler SE, Liu C. Revised Role of Selectfluor in Homogeneous Au-Catalyzed Oxidative CO Bond Formations. Chemistry 2014; 20:15833-9. [DOI: 10.1002/chem.201404277] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Indexed: 11/05/2022]
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14
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Leyva-Pérez A, Cabrero-Antonino JR, Rubio-Marqués P, Al-Resayes SI, Corma A. Synthesis of the ortho/meta/para Isomers of Relevant Pharmaceutical Compounds by Coupling a Sonogashira Reaction with a Regioselective Hydration. ACS Catal 2014. [DOI: 10.1021/cs401075z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Antonio Leyva-Pérez
- Instituto
de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Avda.
de los Naranjos s/n, 46022 Valencia, Spain
| | - Jose R. Cabrero-Antonino
- Instituto
de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Avda.
de los Naranjos s/n, 46022 Valencia, Spain
| | - Paula Rubio-Marqués
- Instituto
de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Avda.
de los Naranjos s/n, 46022 Valencia, Spain
| | - Saud I. Al-Resayes
- Chemistry
Department, College of Science, King Saud University, B.O. BOX 2455, Riyadh 11451, Saudi Arabia
| | - Avelino Corma
- Instituto
de Tecnología Química, Universidad Politécnica de Valencia-Consejo Superior de Investigaciones Científicas, Avda.
de los Naranjos s/n, 46022 Valencia, Spain
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15
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Nikiforov GB, Roesky HW, Koley D. A survey of titanium fluoride complexes, their preparation, reactivity, and applications. Coord Chem Rev 2014. [DOI: 10.1016/j.ccr.2013.09.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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17
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Wang Y, Yepremyan A, Ghorai S, Todd R, Aue DH, Zhang L. Gold-catalyzed cyclizations of cis-enediynes: insights into the nature of gold-aryne interactions. Angew Chem Int Ed Engl 2013; 52:7795-9. [PMID: 23788447 DOI: 10.1002/anie.201301057] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2013] [Revised: 05/06/2013] [Indexed: 12/19/2022]
Abstract
Golden aryne? Gold aryne complexes are inferred as transition states in dual gold-catalyzed cyclizations of cis-enediynes (see scheme; DCE = 1,2-dichloroethane). They are better described as ortho-aurophenyl cations, which react with weak nucleophiles and undergo facile intramolecular insertions into C(sp(3))-H bonds. Indanes, fused heteroarenes, and phenol derivatives are readily prepared using this method.
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Affiliation(s)
- Youliang Wang
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, CA, USA
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Wang Y, Yepremyan A, Ghorai S, Todd R, Aue DH, Zhang L. Gold-Catalyzed Cyclizations ofcis-Enediynes: Insights into the Nature of Gold-Aryne Interactions. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201301057] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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19
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Hashmi ASK, Ghanbari M, Rudolph M, Rominger F. Combining Gold and Palladium Catalysis: One-Pot Access to Pentasubstituted Arenes from Furan-Yne and En-Diyne Substrates. Chemistry 2012; 18:8113-9. [DOI: 10.1002/chem.201200091] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Indexed: 11/08/2022]
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Racowski JM, Gary JB, Sanford MS. Carbon(sp(3))-fluorine bond-forming reductive elimination from palladium(IV) complexes. Angew Chem Int Ed Engl 2012; 51:3414-7. [PMID: 22374779 DOI: 10.1002/anie.201107816] [Citation(s) in RCA: 130] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2011] [Revised: 01/23/2011] [Indexed: 11/09/2022]
Abstract
Pd(IV)-fluoride complexes, some of which are remarkably insensitive to water, have been synthesized and used in the title reaction, which proceeds with high selectivity to give the product of the C(sp(3))-F coupling. Preliminary mechanistic studies implicate a pathway involving dissociation of pyridine followed by direct C-F coupling at the Pd center.
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Affiliation(s)
- Joy M Racowski
- Department of Chemistry, University of Michigan, Ann Arbor, 48109, USA
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Racowski JM, Gary JB, Sanford MS. Carbon(sp3)Fluorine Bond-Forming Reductive Elimination from Palladium(IV) Complexes. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201107816] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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22
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Hollingworth C, Gouverneur V. Transition metal catalysis and nucleophilic fluorination. Chem Commun (Camb) 2012; 48:2929-42. [PMID: 22334339 DOI: 10.1039/c2cc16158c] [Citation(s) in RCA: 318] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Transition metal catalyzed transformations using fluorinating reagents have been developed extensively for the preparation of synthetically valuable fluorinated targets. This is a topic of critical importance to facilitate laboratory and industrial chemical synthesis of fluorine containing pharmaceuticals and agrochemicals. Translation to (18)F-radiochemistry is also emerging as a vibrant research field because functional imaging based on Positron Emission Tomography (PET) is increasingly used for both diagnosis and pharmaceutical development. This review summarizes how fluoride sources have been used for the catalytic nucleophilic fluorination of various substrates inclusive of aryl triflates, alkynes, allylic halides, allylic esters, allylic trichloroacetimidates, benzylic halides, tertiary alkyl halides and epoxides. Until recently, progress in this field of research has been slow in part because of the challenges associated with the dual reactivity profile of fluoride (nucleophile or base). Despite these difficulties, some remarkable breakthroughs have emerged. This includes the demonstration that Pd(0)/Pd(II)-catalyzed nucleophilic fluorination to access fluoroarenes from aryl triflates is feasible, and the first examples of Tsuji-Trost allylic alkylation with fluoride using either allyl chlorides or allyl precursors bearing O-leaving groups. More recently, allylic fluorides were also made accessible under iridium catalysis. Another reaction, which has been greatly improved based on careful mechanistic work, is the catalytic asymmetric hydrofluorination of meso epoxides. Notably, each individual transition metal catalyzed nucleophilic fluorination reported to date employs a different F-reagent, an observation indicating that this area of research will benefit from a larger pool of nucleophilic fluoride sources. In this context, a striking recent development is the successful design, synthesis and applications of a fluoride-derived electrophilic late stage fluorination reagent. This new class of reagents could greatly benefit preclinical and clinical PET imaging.
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Affiliation(s)
- Charlotte Hollingworth
- Chemistry Research Laboratory, University of Oxford, 12 Mansfield Road, OX1 3TA, Oxford, UK
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Ball LT, Lloyd-Jones GC, Russell CA. Gold-catalysed oxyarylation of styrenes and mono- and gem-disubstituted olefins facilitated by an iodine(III) oxidant. Chemistry 2012; 18:2931-7. [PMID: 22298471 DOI: 10.1002/chem.201103061] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Indexed: 11/05/2022]
Abstract
1-Hydroxy-1,2-benziodoxol-3(1H)-one (IBA) is an efficient terminal oxidant for gold-catalysed, three-component oxyarylation reactions. The use of this iodine(III) reagent expands the scope of oxyarylation to include styrenes and gem-disubstituted olefins, substrates that are incompatible with the previously reported Selectfluor-based methodology. Diverse arylsilane coupling partners can be employed, and in benzotrifluoride, homocoupling is substantially reduced. In addition, the IBA-derived co-products can be recovered and recycled.
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Affiliation(s)
- Liam T Ball
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS UK
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Qian J, Liu Y, Zhu J, Jiang B, Xu Z. A Novel Synthesis of Fluorinated Pyrazoles via Gold(I)-Catalyzed Tandem Aminofluorination of Alkynes in the Presence of Selectfluor. Org Lett 2011; 13:4220-3. [DOI: 10.1021/ol201555z] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Jianqiang Qian
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Yunkui Liu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Jie Zhu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Bo Jiang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
| | - Zhenyuan Xu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310014, People’s Repubilc of China
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Giuffredi GT, Bernet B, Gouverneur V. De Novo Synthesis of Racemic 4-Deoxy-4,4-difluoro- and 2,4-Dideoxy-2,4,4-trifluorohexosides. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100565] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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