1
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Zhu H, Gao C, Yu T, Xu C, Wang M. O-Trifluoromethylation of Carboxylic Acids via the Formation and Activation of Acyloxy(phenyl)trifluoromethyl-λ 3-Iodanes. Angew Chem Int Ed Engl 2024; 63:e202400449. [PMID: 38483081 DOI: 10.1002/anie.202400449] [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: 01/08/2024] [Indexed: 04/10/2024]
Abstract
Here we report the challenging O-trifluoromethylation of carboxylic acids via the formation and activation of acyloxy(phenyl)trifluoromethyl-λ3-iodanes. The method provides an easy access to various potentially valuable and hitherto elusive trifluoromethyl carboxylic esters. A remarkably wide range of substrates with commonly encountered functional groups are compatible with this reaction, including aromatic and aliphatic carboxylic acids, as well as Food and Drug Administration (FDA) approved drugs and pharmaceutically relevant molecules. The reaction mechanism and the origins of the enhanced reactivity by zinc chloride (ZnCl2) were discussed from experimental evidence and density functional theory (DFT) calculation.
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Affiliation(s)
- Hongye Zhu
- Department Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China
| | - Chi Gao
- Department Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China
| | - Ting Yu
- Department Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China
| | - Cong Xu
- Department Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China
| | - Mang Wang
- Department Jilin Province Key Laboratory of Organic Functional Molecular Design & Synthesis Department of Chemistry, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China
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2
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Maas LM, Fasting C, Voßnacker P, Limberg N, Golz P, Müller C, Riedel S, Hopkinson MN. Catalyst-Free Trifluoromethoxylation of Silyl Enol Ethers and Allyl Silanes with Bis(trifluoromethyl)peroxide. Angew Chem Int Ed Engl 2024; 63:e202317770. [PMID: 38131450 DOI: 10.1002/anie.202317770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/19/2023] [Accepted: 12/21/2023] [Indexed: 12/23/2023]
Abstract
Radical trifluoromethoxylation is an attractive approach to prepare compounds featuring the important OCF3 group, however most existing methods have focused on aromatic substrates. Here, we report novel methodologies with alkenyl substrates employing bis(trifluoromethyl)peroxide (BTMP) as a practical and comparatively atom economical trifluoromethoxylating reagent. With silyl enol ether substrates, switching reaction solvent allows for the synthesis of either α-(trifluoromethoxy)ketone products or unprecedented alkenyl-OCF3 species. Furthermore, allyl silanes have been employed as substrates for the first time, affording allyl(trifluoromethyl)ether products in good yields. In each case, the methods operate at room temperature without large excesses of the alkene substrate while, in contrast to previous radical trifluoromethoxylation reactions, no catalyst, light or other activators are required.
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Affiliation(s)
- Lilian M Maas
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
- School of Natural and Environmental Sciences, Newcastle University Bedson Building, Newcastle upon Tyne, NE1 7RU, UK
| | - Carlo Fasting
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
| | - Patrick Voßnacker
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
| | - Niklas Limberg
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
| | - Paul Golz
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
| | - Carsten Müller
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
| | - Sebastian Riedel
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
| | - Matthew N Hopkinson
- Institut für Chemie und Biochemie-Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34/36, 14195, Berlin, Germany
- School of Natural and Environmental Sciences, Newcastle University Bedson Building, Newcastle upon Tyne, NE1 7RU, UK
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3
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The once-elusive Ni(IV) species is now a potent candidate for challenging organic transformations. Coord Chem Rev 2023. [DOI: 10.1016/j.ccr.2022.214849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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4
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Dohle W, Asiki H, Gruchot W, Foster PA, Sahota HK, Bai R, Christensen KE, Hamel E, Potter BVL. 2-Difluoromethoxy-Substituted Estratriene Sulfamates: Synthesis, Antiproliferative SAR, Antitubulin Activity, and Steroid Sulfatase Inhibition. ChemMedChem 2022; 17:e202200408. [PMID: 36109340 PMCID: PMC9742152 DOI: 10.1002/cmdc.202200408] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 09/14/2022] [Indexed: 01/14/2023]
Abstract
2-Difluoromethoxyestratriene derivatives were designed to improve potency and in vivo stability of the drug candidate 2-methoxyestradiol (2ME2). Compound evaluation in vitro against the proliferation of MCF-7 and MDA MB-231 breast cancer cells, as inhibitors of tubulin polymerisation and also steroid sulfatase (STS) both in cell lysates and in whole cells, showed promising activities. In antiproliferative assays 2-difluoromethoxyestradiol was less potent than 2ME2, but its sulfamates were often more potent than their corresponding non-fluorinated analogues. The fluorinated bis-sulfamate is a promising antiproliferative agent in MCF-7 cells (GI50 0.28 μM) vs the known 2-methoxyestradiol-3,17-O,O-bissulfamate (STX140, GI50 0.52 μM), confirming the utility of our approach. Compounds were also evaluated in the NCI 60-cell line panel and the fluorinated bis-sulfamate derivative displayed very good overall activities with a sub-micromolar average GI50 . It was a very potent STS inhibitor in whole JEG-3 cells (IC50 3.7 nM) similar to STX140 (4.2 nM) and additionally interferes with tubulin assembly in vitro and colchicine binding to tubulin. An X-ray study of 2-difluoromethoxy-3-benzyloxyestra-1,3,5(10)-trien-17-one examined conformational aspects of the fluorinated substituent. The known related derivative 2-difluoromethyl-3-sulfamoyloxyestrone was evaluated for STS inhibition in whole JEG-3 cells and showed an excellent IC50 of 55 pM.
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Affiliation(s)
- Wolfgang Dohle
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Hannah Asiki
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Wojciech Gruchot
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
| | - Paul A Foster
- Institute of Metabolism & Systems Research, University of Birmingham, 2nd Floor IBR Tower Edgbaston, Birmingham, B15 2TT, UK
- Centre for Endocrinology, Metabolism and Diabetes, University of Birmingham, Birmingham Health Partners, Birmingham, B15 2TT, UK
| | - Havreen K Sahota
- Institute of Metabolism & Systems Research, University of Birmingham, 2nd Floor IBR Tower Edgbaston, Birmingham, B15 2TT, UK
| | - Ruoli Bai
- Molecular Pharmacology Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick, MD, 21702, USA
| | - Kirsten E Christensen
- Chemical Crystallography, Department of Chemistry, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK
| | - Ernest Hamel
- Molecular Pharmacology Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, National Cancer Institute, Frederick, MD, 21702, USA
| | - Barry V L Potter
- Medicinal Chemistry & Drug Discovery, Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, OX1 3QT, UK
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5
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Baguia H, Evano G. Direct Perfluoroalkylation of C−H Bonds in (Hetero)arenes. Chemistry 2022; 28:e202200975. [DOI: 10.1002/chem.202200975] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Indexed: 11/08/2022]
Affiliation(s)
- Hajar Baguia
- Laboratoire de Chimie Organique Service de Chimie et Physico-Chimie Organiques Université libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brussels Belgium
| | - Gwilherm Evano
- Laboratoire de Chimie Organique Service de Chimie et Physico-Chimie Organiques Université libre de Bruxelles (ULB) Avenue F. D. Roosevelt 50, CP160/06 1050 Brussels Belgium
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6
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Jakubczyk M, Mkrtchyan S, Shkoor M, Lanka S, Budzák Š, Iliaš M, Skoršepa M, Iaroshenko VO. Mechanochemical Conversion of Aromatic Amines to Aryl Trifluoromethyl Ethers. J Am Chem Soc 2022; 144:10438-10445. [PMID: 35652785 PMCID: PMC9204773 DOI: 10.1021/jacs.2c02611] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
![]()
Increased interest
in the trifluoromethoxy group in organic synthesis
and medicinal chemistry has induced a demand for new, selective, general,
and faster methods applicable to natural products and highly functionalized
compounds at a later stage of hit-to-lead campaigns. Applying pyrylium
tetrafluoroborate, we have developed a mechanochemical protocol to
selectively substitute the aromatic amino group with the OCF3 functionality. The scope of our method includes 31 examples of ring-substituted
anilines, including amides and sulfonamides. Expected SNAr products were obtained in excellent yields. The presented concise
method opens a pathway to new chemical spaces for the pharmaceutical
industry.
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Affiliation(s)
- Michał Jakubczyk
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, Poznań 61-704, Poland
| | - Satenik Mkrtchyan
- Laboratory of Homogeneous Catalysis and Molecular Design at the Center of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, Łodź PL-90-363, Poland
| | - Mohanad Shkoor
- Department of Chemistry and Earth Sciences, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Suneel Lanka
- Lodz University of Technology, Stefana Żeromskiego 116, Lodz 90-924, Poland
| | - Šimon Budzák
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, Banská Bystrica 97401, Slovakia
| | - Miroslav Iliaš
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, Banská Bystrica 97401, Slovakia
| | - Marek Skoršepa
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, Banská Bystrica 97401, Slovakia
| | - Viktor O Iaroshenko
- Department of Chemistry, Faculty of Natural Sciences, Matej Bel University, Tajovského 40, Banská Bystrica 97401, Slovakia.,Department of Chemistry, University of Helsinki, A.I. Virtasen aukio 1, Helsinki 00014, Finland
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7
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Liu J, Lin W, Sorochinsky AE, Butler G, Landa A, Han J, Soloshonok VA. Successful trifluoromethoxy-containing pharmaceuticals and agrochemicals. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.109978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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8
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Ouyang Y, Xu X, Qing F. Electrochemical Trifluoromethoxylation of (Hetero)aromatics with a Trifluoromethyl Source and Oxygen. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114048] [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)
- Yao Ouyang
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Xiu‐Hua Xu
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
| | - Feng‐Ling Qing
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry University of Chinese Academy of Science Chinese Academy of Sciences 345 Lingling Lu Shanghai 200032 China
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9
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Abstract
This review provides a short summary of the traditional methods for synthesis of CF3-O-containing compounds, followed by a critical overview of known trifluoromethoxylating reagents, focusing on their preparation, synthetic generality and limitations.
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10
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Bernd J, Werner P, Zeplichal M, Terfort A. Electrochemical O-trifluoromethylation of electron-deficient phenols. Electrochem commun 2021. [DOI: 10.1016/j.elecom.2021.107165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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11
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Ouyang Y, Xu XH, Qing FL. Electrochemical Trifluoromethoxylation of (Hetero)aromatics with a Trifluoromethyl Source and Oxygen. Angew Chem Int Ed Engl 2021; 61:e202114048. [PMID: 34755434 DOI: 10.1002/anie.202114048] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 11/08/2021] [Indexed: 11/08/2022]
Abstract
Trifluoromethoxylated aromatics (ArOCF3 ) are valuable structural motifs in the area of drug discovery due to the enhancement of their desired physicochemical properties upon the introduction of the trifluoromethoxy group (CF3 O). Although significant progress has been made recently in the introduction of CF3 O group into aromatics, current methods either require the use of expensive trifluoromethoxylation reagents or require harsh reaction conditions. We present a conceptually new and operationally simple protocol for the direct C-H trifluoromethoxylation of (hetero)aromatics by the combination of the readily available trifluoromethylating reagent and oxygen under electrochemical reaction conditions. This reaction proceeds through the initial generation of CF3 radical followed by conversion to CF3 O radical, addition to (hetero)aromatics and rearomatization. The utility of this electrochemical trifluoromethoxylation is illustrated by the direct incorporation of CF3 O group into a variety of (hetero)aromatics as well as bio-relevant molecules.
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Affiliation(s)
- Yao Ouyang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Feng-Ling Qing
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
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12
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Lu Z, Kumon T, Hammond GB, Umemoto T. Trifluoromethyl Nonaflate: A Practical Trifluoromethoxylating Reagent and its Application to the Regio‐ and Stereoselective Synthesis of Trifluoromethoxylated Alkenes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104975] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhichao Lu
- Department of Chemistry University of Louisville Louisville KY 40292 USA
| | - Tatsuya Kumon
- Faculty of Molecular Chemistry and Engineering Kyoto Institute of Technology Matsugasaki, Sakyo-ku Kyoto 606-8585 Japan
| | - Gerald B. Hammond
- Department of Chemistry University of Louisville Louisville KY 40292 USA
| | - Teruo Umemoto
- Department of Chemistry University of Louisville Louisville KY 40292 USA
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13
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Lu Z, Kumon T, Hammond GB, Umemoto T. Trifluoromethyl Nonaflate: A Practical Trifluoromethoxylating Reagent and its Application to the Regio- and Stereoselective Synthesis of Trifluoromethoxylated Alkenes. Angew Chem Int Ed Engl 2021; 60:16171-16177. [PMID: 34010513 DOI: 10.1002/anie.202104975] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Indexed: 01/18/2023]
Abstract
The trifluoromethoxy group has elicited much interest among drug and agrochemical discovery teams because of its unique properties. We developed trifluoromethyl nonafluorobutanesulfonate (nonaflate), TFNf, an easy-to-handle, bench-stable, reactive, and scalable trifluoromethoxylating reagent. TFNf is easily and safely prepared in a simple process in large scale and the nonaflyl part of TFNf can easily be recovered as nonaflyl fluoride after usage and recycled. The synthetic potency of TFNf was showcased with the underexplored synthesis of various trifluoromethoxylated alkenes, through a high regio- and stereoselective hydro(halo)trifluoromethoxylation of alkyne derivatives such as haloalkynes, alkynyl esters, and alkynyl sulfones. The synthetic merits of TFNf were further underscored with a high-yielding and smooth nucleophilic trifluoromethoxylation of alkyl triflates/bromides and primary/secondary alcohols.
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Affiliation(s)
- Zhichao Lu
- Department of Chemistry, University of Louisville, Louisville, KY, 40292, USA
| | - Tatsuya Kumon
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto, 606-8585, Japan
| | - Gerald B Hammond
- Department of Chemistry, University of Louisville, Louisville, KY, 40292, USA
| | - Teruo Umemoto
- Department of Chemistry, University of Louisville, Louisville, KY, 40292, USA
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14
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Jiang X, Tang P. Recent Advances of Trifluoromethoxylation Reactions Using
TFMS
and
TFBO. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000465] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento‐Organic Chemistry, College of Chemistry, Nankai University Tianjin 300071 China
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15
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Gonay M, Batisse C, Paquin JF. Synthesis of Acyl Fluorides from Carboxylic Acids Using NaF-Assisted Deoxofluorination with XtalFluor-E. J Org Chem 2020; 85:10253-10260. [PMID: 32691597 DOI: 10.1021/acs.joc.0c01377] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The synthesis of acyl fluorides using the deoxofluorination reaction of carboxylic acids using XtalFluor-E is described. This transformation, assisted by a catalytic amount of NaF, occurs at room temperature in EtOAc, where XtalFluor-E behaves as the activating agent and the fluoride source. A wide range of acyl fluorides were obtained in moderate to excellent yields (36-99%) after a simple filtration on a pad of silica gel. We also demonstrated that sequential deoxofluorination/amidation was possible.
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Affiliation(s)
- Marie Gonay
- CCVC, PROTEO, Département de chimie, Université Laval, 1045 Avenue de la Médecine, Québec, Québec G1V 0A6, Canada
| | - Chloé Batisse
- 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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16
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Nyuchev AV, Wan T, Cendón B, Sambiagio C, Struijs JJC, Ho M, Gulías M, Wang Y, Noël T. Photocatalytic trifluoromethoxylation of arenes and heteroarenes in continuous-flow. Beilstein J Org Chem 2020; 16:1305-1312. [PMID: 32595778 PMCID: PMC7308607 DOI: 10.3762/bjoc.16.111] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2020] [Accepted: 05/24/2020] [Indexed: 01/20/2023] Open
Abstract
The first example of photocatalytic trifluoromethoxylation of arenes and heteroarenes under continuous-flow conditions is described. Application of continuous-flow microreactor technology allowed to reduce the residence time up to 16 times in comparison to the batch procedure, while achieving similar or higher yields. In addition, the use of inorganic bases was demonstrated to increase the reaction yield under batch conditions.
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Affiliation(s)
- Alexander V Nyuchev
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands
| | - Ting Wan
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands
| | - Borja Cendón
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands.,Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Carlo Sambiagio
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands
| | - Job J C Struijs
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands
| | - Michelle Ho
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands
| | - Moisés Gulías
- Centro Singular de Investigación en Química Biolóxica e Materiais Moleculares (CIQUS) and Departamento de Química Orgánica, Universidade de Santiago de Compostela, 15782 Santiago de Compostela, Spain
| | - Ying Wang
- Discovery Chemistry and Technologies, AbbVie Inc., 1 North Waukegan, Road, North Chicago, Illinois 60064, United States of America
| | - Timothy Noël
- Micro Flow Chemistry and Synthetic Methodology, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Het Kranenveld, Bldg 14 - Helix, 5600 MB Eindhoven, The Netherlands
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17
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Abstract
In spite of only a few naturally occurring products having one or more fluorine atoms, organofluorine compounds have been widely utilized in pharmaceutical, agrochemical, and functional material science fields due to the characteristic properties of the fluorine atom. Therefore, the development of new methods for the introduction of fluorine-containing functional groups has been a long-standing research topic. This article discusses our contributions to this area. The first topic is on the trifluoromethylations of C-C multiple bonds using Togni reagent based on our working hypothesis that hypervalent iodine could be activated by coordination of the carbonyl moiety to the Lewis acid catalyst. The second topic relates to asymmetric fluorofunctionalization of alkenes. A newly designed phase-transfer catalyst consisting of a carboxylate anion functioning as a phase-transfer agent and a primary hydroxyl group as a site that captures the anionic substrate was revealed to be an effective catalyst for asymmetric fluorolactonization. Inspired by the mechanistic studies of fluorolactonization, we produced a linked binaphthyl dicarboxylate catalyst, which catalyzes the 6-endo-fluorocyclization and the deprotonative fluorination of allylic amides in a highly enantioselective manner. The third topic is on C-H fluorofunctionalizations using either catalysis or photoactivation. Benzylic trifluoromethylation, which is still a rare reaction, using Togni reagent and aromatic C-H trifluoromethylation using Umemoto reagent under simple photoirradiation conditions were achieved. In addition, the Csp3-H fluorination of alkyl phthalimide derivatives is demonstrated.
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18
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Selective C-H trifluoromethoxylation of (hetero)arenes as limiting reagent. Nat Commun 2020; 11:2569. [PMID: 32444828 PMCID: PMC7244481 DOI: 10.1038/s41467-020-16451-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Accepted: 05/04/2020] [Indexed: 02/01/2023] Open
Abstract
Methods for direct C-H trifluoromethoxylation of arenes and heteroarenes are rare, despite the importance of trifluoromethoxylated compounds for pharmaceuticals, agrochemicals, and material sciences. Especially selective C-H trifluoromethoxylation of pyridines remains a formidable challenge. Here we show a general late-stage C-H trifluoromethoxylation of arenes and heteroarenes as limiting reagent with trifluoromethoxide anion. The reaction is mediated by silver salts under mild reaction conditions, exhibiting broad substrate scope and wide functional-group compatibility. In addition, ortho-position selective C-H trifluoromethoxylation of pyridines is observed. The method is not only applicable to the gram-scale synthesis of trifluoromethoxylated products but also allows efficient late-stage C-H trifluoromethoxylation of marketed small-molecule drugs, common pharmacophores and natural products. Selective C-H trifluoromethoxylation of pyridines remains a formidable synthetic challenge. Here, the authors report a silver-mediated late-stage C-H trifluoromethoxylation of arenes and heteroarenes as limiting reagents with trifluoromethoxide anion.
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19
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Zhang T, Xie C, Sakata H, Nakajima K, Shimoyama T, Watanabe T, Maekawa H. A Simple Protocol from Benzalacetones to 1,1,1-Trifluoro-2,5-diketones and 2-(Trifluoromethyl)furans by Reductive Trifluoroacetylation. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000160] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Tianyuan Zhang
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
| | - Chunchao Xie
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
| | - Hiroto Sakata
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
| | - Konomi Nakajima
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
| | - Tatsuya Shimoyama
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
| | - Tomohiro Watanabe
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
| | - Hirofumi Maekawa
- Department of Materials Science and Technology; Nagaoka University of Technology; 1603-1, Kamitomioka-cho 940-2188 Nagaoka Niigata Japan
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20
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Synthesis, physico-chemical properties and microsomal stability of compounds bearing aliphatic trifluoromethoxy group. J Fluor Chem 2020. [DOI: 10.1016/j.jfluchem.2020.109461] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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21
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Li Y, Yang Y, Xin J, Tang P. Nucleophilic trifluoromethoxylation of alkyl halides without silver. Nat Commun 2020; 11:755. [PMID: 32029731 PMCID: PMC7005179 DOI: 10.1038/s41467-020-14598-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 01/15/2020] [Indexed: 11/27/2022] Open
Abstract
The biological properties of molecules containing the trifluoromethoxy group have made these compounds important targets in pharmaceuticals and agrochemicals, yet their preparation is still a substantial challenge. Herein, we present a practical nucleophilic trifluoromethoxylation of alkyl halides with (E)-O-trifluoromethyl-benzaldoximes (TFBO) as a trifluoromethoxylation reagent in the absence of silver under mild reaction conditions. The trifluoromethoxylation reagent TFBO is easily prepared and thermally stable, and can release CF3O− species in the presence of a base. Furthermore, broad scope and good functional group compatibility are demonstrated by application of the method to the late-stage trifluoromethoxylation of alkyl halides in complex small molecules. Trifluoromethyl ethers are important bioactive targets in pharmaceuticals and agrochemicals, however, their synthesis is often not straightforward. Here, the authors disclose a reagent for the nucleophilic trifluoromethoxylation of alkyl halides without silver and under mild conditions.
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Affiliation(s)
- Yan Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yang Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Jinrui Xin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China.
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22
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Yoritate M, Londregan AT, Lian Y, Hartwig JF. Sequential Xanthalation and O-Trifluoromethylation of Phenols: A Procedure for the Synthesis of Aryl Trifluoromethyl Ethers. J Org Chem 2019; 84:15767-15776. [PMID: 31738556 DOI: 10.1021/acs.joc.9b02717] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Molecules containing trifluoromethoxyaryl groups are of interest in pharmaceutical, agrochemical, and materials science research, due to their unique physical and electronic properties. Many of the known methods to synthesize aryl trifluoromethyl ethers require harsh reagents and highly controlled reaction conditions and rarely occur when heteroaromatic units are present. The two-step O-trifluoromethylation of phenols via aryl xanthates is one such method that suffers from these drawbacks. Herein, we report a method for the synthesis of aryl trifluoromethyl ethers from phenols by the facile conversion of the phenol to the corresponding aryl and heteroaryl xanthates with newly synthesized imidazolium methylthiocarbonothioyl salts and conversion of these xanthates to the trifluoromethyl ethers under mild reaction conditions.
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Affiliation(s)
- Makoto Yoritate
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
| | - Allyn T Londregan
- Medicine Design , Pfizer Inc. , Groton , Connecticut 06340 , United States
| | - Yajing Lian
- Medicine Design , Pfizer Inc. , Groton , Connecticut 06340 , United States
| | - John F Hartwig
- Department of Chemistry , University of California , Berkeley , California 94720 , United States
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23
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Kawamura S, Sodeoka M. Fluoroalkylation Methods for Synthesizing Versatile Building Blocks. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190080] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shintaro Kawamura
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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24
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Yang S, Chen M, Tang P. Visible‐Light Photoredox‐Catalyzed and Copper‐Promoted Trifluoromethoxylation of Arenediazonium Tetrafluoroborates. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201901447] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Shaoqiang Yang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Miao Chen
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
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25
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Yang S, Chen M, Tang P. Visible-Light Photoredox-Catalyzed and Copper-Promoted Trifluoromethoxylation of Arenediazonium Tetrafluoroborates. Angew Chem Int Ed Engl 2019; 58:7840-7844. [PMID: 30964599 DOI: 10.1002/anie.201901447] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2019] [Indexed: 01/16/2023]
Abstract
We report the development of photoredox-catalyzed and copper-promoted trifluoromethoxylation of arenediazonium tetrafluoroborates, with trifluoromethyl arylsulfonate (TFMS) as the trifluoromethoxylation reagent. This new method takes advantage of visible-light photoredox catalysis to generate the aryl radical under mild conditions, combined with copper-promoted selective trifluoromethoxylation. The reaction is scalable, tolerates a wide range of functional groups, and proceeds regioselectively under mild reaction conditions. Furthermore, mechanistic studies suggested that a Cs[Cu(OCF3 )2 ] intermediate might be generated during the reaction.
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Affiliation(s)
- Shaoqiang Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Miao Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
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26
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Wang J, Sun K, Chen X, Chen T, Liu Y, Qu L, Zhao Y, Yu B. An External-Catalyst-Free Trifluoromethylation/Cyclization Strategy To Access Trifluoromethylated-Dihydroisoquinolinones/Indolines with Togni Reagent II. Org Lett 2019; 21:1863-1867. [DOI: 10.1021/acs.orglett.9b00465] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Junchao Wang
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Kai Sun
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Xiaolan Chen
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
- The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Tong Chen
- High and New Technology Research Center of Henan Academy of Sciences, Zhengzhou 450001, China
| | - Yan Liu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Lingbo Qu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
| | - Yufen Zhao
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
- The Key Laboratory for Chemical Biology of Fujian Province, Xiamen University, Xiamen 361005, China
| | - Bing Yu
- College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China
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27
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Murakami R, Sekine D, Aoki Y, Kawamura S, Sodeoka M. Control of site selectivity in trifluoromethylation of alkenes bearing a pendant indolyl group: Synthesis of CF3-containing tetrahydrocarbazoles. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.01.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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28
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Pletz J, Koeberl C, Fuchs M, Steiner O, Goessler W, Kroutil W. Cu and Hydroquinone for the Trifluoromethylation of Unprotected Phenols. European J Org Chem 2019; 2019:682-690. [PMID: 30853852 PMCID: PMC6391967 DOI: 10.1002/ejoc.201801111] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Indexed: 11/29/2022]
Abstract
Fluorination and trifluoromethylation are indispensable tools in the preparation of modern pharmaceuticals and APIs. Herein we present a concept for the introduction of a trifluoromethyl group into unprotected phenols employing catalytic copper(I) iodide and hydroquinone, tBuOOH, and the Langlois' reagent. The method proceeds under mild conditions and exhibits an extended substrate scope compared to the biocatalytic trifluoromethylation using laccase from Agaricus bisporus. Various functional groups such as aldehydes, esters, ethers, ketones and nitriles were tolerated. The hydroquinone-mediated trifluoromethylation reaction allowed accessing trifluoromethylated phenols, which are cumbersome to prepare via previously known chemical methods.
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Affiliation(s)
- Jakob Pletz
- Institute of ChemistryNAWI GrazBioTechMed GrazUniversity of GrazHeinrichstraße 288010GrazAustria
| | - Christoph Koeberl
- Institute of ChemistryNAWI GrazBioTechMed GrazUniversity of GrazHeinrichstraße 288010GrazAustria
| | - Michael Fuchs
- Institute of ChemistryNAWI GrazBioTechMed GrazUniversity of GrazHeinrichstraße 288010GrazAustria
| | - Oliver Steiner
- Institute of ChemistryNAWI GrazUniversity of GrazUniversitätsplatz 1/18010GrazAustria
| | - Walter Goessler
- Institute of ChemistryNAWI GrazUniversity of GrazUniversitätsplatz 1/18010GrazAustria
| | - Wolfgang Kroutil
- Institute of ChemistryNAWI GrazBioTechMed GrazUniversity of GrazHeinrichstraße 288010GrazAustria
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29
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Calvo R, Comas-Vives A, Togni A, Katayev D. Taming Radical Intermediates for the Construction of Enantioenriched Trifluoromethylated Quaternary Carbon Centers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201812793] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Roxan Calvo
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
- Department of Chemistry; Universitat Autònoma de Barcelona; Cerdanyla del Vallès 08193 Catalonia Spain
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Dmitry Katayev
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
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30
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Calvo R, Comas-Vives A, Togni A, Katayev D. Taming Radical Intermediates for the Construction of Enantioenriched Trifluoromethylated Quaternary Carbon Centers. Angew Chem Int Ed Engl 2018; 58:1447-1452. [DOI: 10.1002/anie.201812793] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2018] [Indexed: 01/12/2023]
Affiliation(s)
- Roxan Calvo
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Aleix Comas-Vives
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
- Department of Chemistry; Universitat Autònoma de Barcelona; Cerdanyla del Vallès 08193 Catalonia Spain
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
| | - Dmitry Katayev
- Department of Chemistry and Applied Biosciences; Swiss Federal Institute of Technology; ETH Zürich; Vladimir-Prelog-Weg 2 8093 Zürich Switzerland
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31
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Wang F, Xu P, Cong F, Tang P. Silver-mediated oxidative functionalization of alkylsilanes. Chem Sci 2018; 9:8836-8841. [PMID: 30627401 PMCID: PMC6296296 DOI: 10.1039/c8sc03730b] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 09/22/2018] [Indexed: 11/21/2022] Open
Abstract
A general approach to the functionalization of aliphatic C-Si bonds in the presence of silver salts and oxidants has been reported. This strategy encompasses a range of valuable C-Si transformations, including the direct conversions of a C-Si bond to C-OCF3, C-OBz, C-OCOCF3, C-SCF3, C-SCN, and C-N3 bonds. Among them, trifluoromethoxylation of alkylsilanes is reported for the first time. In addition, mechanistic studies indicate that this reaction may proceed through a radical mechanism.
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Affiliation(s)
- Feng Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Peng Xu
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Fei Cong
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of 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 , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
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32
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Yang H, Wang F, Jiang X, Zhou Y, Xu X, Tang P. Silver-Promoted Oxidative Benzylic C-H Trifluoromethoxylation. Angew Chem Int Ed Engl 2018; 57:13266-13270. [PMID: 30085396 DOI: 10.1002/anie.201807144] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/20/2018] [Indexed: 11/08/2022]
Abstract
A silver-promoted oxidative benzylic C-H trifluoromethoxylation has been reported for the first time. With trifluoromethyl arylsulfonate as the trifluoromethoxylation reagent, various arenes, having diverse functional groups, undergo trifluoromethoxylation of their benzylic C-H bonds to form trifluoromethyl ethers under mild reaction conditions. In addition, the trifluoromethoxylation and the fluorination of methyl groups of electron-rich arenes have been achieved to prepare α-fluorobenzyl trifluoromethyl ethers in one step.
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Affiliation(s)
- Haodong Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Feng Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Yu Zhou
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xiufang Xu
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
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33
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Yang H, Wang F, Jiang X, Zhou Y, Xu X, Tang P. Silver‐Promoted Oxidative Benzylic C−H Trifluoromethoxylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807144] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Haodong Yang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
| | - Feng Wang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
| | - Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
| | - Yu Zhou
- Department of ChemistryKey Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)College of ChemistryNankai University Tianjin 300071 China
| | - Xiufang Xu
- Department of ChemistryKey Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)College of ChemistryNankai University Tianjin 300071 China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
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34
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Jelier BJ, Tripet PF, Pietrasiak E, Franzoni I, Jeschke G, Togni A. Radikalische Trifluormethoxylierung aromatischer Verbindungen durch photochemische N‐O‐Bindungsaktivierung. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806296] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Benson J. Jelier
- Department Chemie und Angewandte BiowissenschaftenEidgenössische Technische Hochschule (ETH) Vladimir-Prelog-Weg 2 8093 Zürich Schweiz
| | - Pascal F. Tripet
- Department Chemie und Angewandte BiowissenschaftenEidgenössische Technische Hochschule (ETH) Vladimir-Prelog-Weg 2 8093 Zürich Schweiz
| | - Ewa Pietrasiak
- Department Chemie und Angewandte BiowissenschaftenEidgenössische Technische Hochschule (ETH) Vladimir-Prelog-Weg 2 8093 Zürich Schweiz
| | - Ivan Franzoni
- Department of ChemistryUniversity of Toronto Toronto M5S 3H6 Kanada
| | - Gunnar Jeschke
- Department Chemie und Angewandte BiowissenschaftenEidgenössische Technische Hochschule (ETH) Vladimir-Prelog-Weg 2 8093 Zürich Schweiz
| | - Antonio Togni
- Department Chemie und Angewandte BiowissenschaftenEidgenössische Technische Hochschule (ETH) Vladimir-Prelog-Weg 2 8093 Zürich Schweiz
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35
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Jelier BJ, Tripet PF, Pietrasiak E, Franzoni I, Jeschke G, Togni A. Radical Trifluoromethoxylation of Arenes Triggered by a Visible-Light-Mediated N-O Bond Redox Fragmentation. Angew Chem Int Ed Engl 2018; 57:13784-13789. [PMID: 29927506 DOI: 10.1002/anie.201806296] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Indexed: 11/08/2022]
Abstract
A simple trifluoromethoxylation method enables non-directed functionalization of C-H bonds on a range of substrates, providing access to aryl trifluoromethyl ethers. This light-driven process is distinctly different from conventional procedures and occurs through an OCF3 radical mechanism mediated by a photoredox catalyst, which triggers an N-O bond fragmentation. The pyridinium-based trifluoromethoxylation reagent is bench-stable and provides access to synthetic diversity in lead compounds in an operationally simple manner.
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Affiliation(s)
- Benson J Jelier
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
| | - Pascal F Tripet
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
| | - Ewa Pietrasiak
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
| | - Ivan Franzoni
- Department of Chemistry, University of Toronto, Toronto, M5S 3H6, Canada
| | - Gunnar Jeschke
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences, Swiss Federal Institute of Technology, Vladimir-Prelog-Weg 2, 8093, Zürich, Switzerland
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36
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Zheng W, Morales-Rivera CA, Lee JW, Liu P, Ngai MY. Catalytic C-H Trifluoromethoxylation of Arenes and Heteroarenes. Angew Chem Int Ed Engl 2018; 57:9645-9649. [PMID: 29534322 PMCID: PMC6105550 DOI: 10.1002/anie.201800598] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Indexed: 11/09/2022]
Abstract
The intermolecular C-H trifluoromethoxylation of arenes remains a long-standing and unsolved problem in organic synthesis. Herein, we report the first catalytic protocol employing a novel trifluoromethoxylating reagent and redox-active catalysts for the direct (hetero)aryl C-H trifluoromethoxylation. Our approach is operationally simple, proceeds at room temperature, uses easy-to-handle reagents, requires only 0.03 mol % of redox-active catalysts, does not need specialized reaction apparatus, and tolerates a wide variety of functional groups and complex structures such as sugars and natural product derivatives. Importantly, both ground-state and photoexcited redox-active catalysts are effective. Detailed computational and experimental studies suggest a unique reaction pathway where photoexcitation of the trifluoromethoxylating reagent releases the OCF3 radical that is trapped by (hetero)arenes. The resulting cyclohexadienyl radicals are oxidized by redox-active catalysts and deprotonated to form the desired products of trifluoromethoxylation.
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Affiliation(s)
- Weijia Zheng
- Department of Chemistry, and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, 11794, USA
| | | | - Johnny W Lee
- Department of Chemistry, and Institute of Chemical Biology and Drug Discovery, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, 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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37
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Wang Q, Qu Y, Xia Q, Song H, Song H, Liu Y, Wang Q. Synthesis of gem
-Difluorinated Spiro-γ-lactam Oxindoles by Visible-Light-Induced Consecutive Difluoromethylative Dearomatization, Hydroxylation, and Oxidation. Chemistry 2018; 24:11283-11287. [DOI: 10.1002/chem.201802141] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Revised: 05/21/2018] [Indexed: 01/01/2023]
Affiliation(s)
- Qiang Wang
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
| | - Yi Qu
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
| | - Qing Xia
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
| | - Hongjian Song
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
| | - Haibin Song
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
| | - Yuxiu Liu
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
| | - Qingmin Wang
- State Key Laboratory of Elemento-Organic Chemistry; Research Institute of Elemento-Organic Chemistry; College of Chemistry; Collaborative Innovation Center of, Chemical Science and Engineering (Tianjin); Nankai University; Tianjin 300071 P. R. China
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38
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Guo Q, Wang M, Liu H, Wang R, Xu Z. Visible-Light-Promoted Dearomative Fluoroalkylation of β-Naphthols through Intermolecular Charge Transfer. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800767] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Quanping Guo
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Mengran Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Hong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Zhaoqing Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
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39
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Guo Q, Wang M, Liu H, Wang R, Xu Z. Visible-Light-Promoted Dearomative Fluoroalkylation of β-Naphthols through Intermolecular Charge Transfer. Angew Chem Int Ed Engl 2018; 57:4747-4751. [PMID: 29476596 DOI: 10.1002/anie.201800767] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 02/08/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Quanping Guo
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Mengran Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Hong Liu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
| | - Zhaoqing Xu
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science; Lanzhou University; 199 West Donggang Road Lanzhou 730000 China
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40
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Zheng W, Morales‐Rivera CA, Lee JW, Liu P, Ngai M. Catalytic C−H Trifluoromethoxylation of Arenes and Heteroarenes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800598] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Weijia Zheng
- Department of Chemistry, and Institute of Chemical Biology and Drug Discovery Stony Brook University Stony Brook NY 11794 USA
| | | | - Johnny W. Lee
- Department of Chemistry, and Institute of Chemical Biology and Drug Discovery Stony Brook University Stony Brook NY 11794 USA
| | - Peng Liu
- Department of Chemistry University of Pittsburgh Pittsburgh PA 15260 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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41
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Cong F, Wei Y, Tang P. Combining photoredox and silver catalysis for azidotrifluoromethoxylation of styrenes. Chem Commun (Camb) 2018; 54:4473-4476. [DOI: 10.1039/c8cc01096j] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
An intermolecular azidotrifluoromethoxylation of styrenes by synergistic visible-light-mediated photoredox and silver catalysis has been reported for the first time.
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Affiliation(s)
- Fei Cong
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Yongliang Wei
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- College of Chemistry
- Nankai University
- Tianjin 300071
- China
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42
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Zhu L, Ye JH, Duan M, Qi X, Yu DG, Bai R, Lan Y. The mechanism of copper-catalyzed oxytrifluoromethylation of allylamines with CO2: a computational study. Org Chem Front 2018. [DOI: 10.1039/c7qo00838d] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
We propose a novel Cu(i)–Cu(ii) catalytic cycle for the copper-catalyzed oxytrifluoromethylation of allylamines with CO2, which proceeds through a radical–radical cross-coupling pathway.
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Affiliation(s)
- Lei Zhu
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- China
| | - Jian-Heng Ye
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Meng Duan
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- China
| | - Xiaotian Qi
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- China
| | - Da-Gang Yu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu
- China
| | - Ruopeng Bai
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- China
| | - Yu Lan
- School of Chemistry and Chemical Engineering
- Chongqing University
- Chongqing
- China
- College of Chemistry and Molecular Engineering
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43
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Zhang QW, Hartwig JF. Synthesis of heteroaromatic trifluoromethyl ethers with trifluoromethyl triflate as the source of the trifluoromethoxy group. Chem Commun (Camb) 2018; 54:10124-10127. [DOI: 10.1039/c8cc05084h] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A series of nitrogen-heterocycles have been transformed to the corresponding trifluoromethyl and higher perfluoroalkyl ethers by the reaction of the N-oxides with trifluoromethyl triflate as a bifunctional reagent.
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Affiliation(s)
- Qing-Wei Zhang
- Department of Chemistry
- University of California
- Berkeley
- USA
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44
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Kondo H, Maeno M, Hirano K, Shibata N. Asymmetric synthesis of α-trifluoromethoxy ketones with a tetrasubstituted α-stereogenic centre via the palladium-catalyzed decarboxylative allylic alkylation of allyl enol carbonates. Chem Commun (Camb) 2018; 54:5522-5525. [DOI: 10.1039/c8cc03131b] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The Pd-catalyzed asymmetric decarboxylative allylic alkylation of trifluoromethoxy allyl enol carbonates is disclosed.
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Affiliation(s)
- Hiroya Kondo
- Department of Nanopharmaceutical Sciences
- and Department of Life Science and Applied Chemistry
- Nagoya Institute of Technology
- Gokiso
- Showa-ku
| | - Mayaka Maeno
- Department of Nanopharmaceutical Sciences
- and Department of Life Science and Applied Chemistry
- Nagoya Institute of Technology
- Gokiso
- Showa-ku
| | - Kazuki Hirano
- Department of Nanopharmaceutical Sciences
- and Department of Life Science and Applied Chemistry
- Nagoya Institute of Technology
- Gokiso
- Showa-ku
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences
- and Department of Life Science and Applied Chemistry
- Nagoya Institute of Technology
- Gokiso
- Showa-ku
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45
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Caramenti P, Waser J. Bench-Stable Electrophilic Indole and Pyrrole Reagents: Serendipitous Discovery and Use in C-H Functionalization. Helv Chim Acta 2017. [DOI: 10.1002/hlca.201700221] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Paola Caramenti
- Laboratory of Catalysis and Organic Synthesis; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; Av. Forel 2 1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis; Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; Av. Forel 2 1015 Lausanne Switzerland
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46
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Affiliation(s)
- Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
| | - Zhijie Deng
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry; College of Chemistry; Nankai University; Collaborative Innovation Center of Chemical Science and Engineering (Tianjin); Tianjin 300071 China
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47
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Jiang X, Deng Z, Tang P. Direct Dehydroxytrifluoromethoxylation of Alcohols. Angew Chem Int Ed Engl 2017; 57:292-295. [PMID: 29125711 DOI: 10.1002/anie.201711050] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Indexed: 11/07/2022]
Abstract
The first example of a direct dehydroxytrifluoromethoxylation of alcohols has been developed. This method generated an alkyl fluoroformate in situ from alcohols, followed by nucleophilic trifluoromethoxylation with trifluoromethyl arylsulfonate (TFMS) as the trifluoromethoxylation reagent. The reaction is operationally simple and scalable, and it proceeds under mild reaction conditions to provide access to a wide range of trifluoromethyl ethers from alcohols. In addition, this method is suitable for the late-stage trifluoromethoxylation of complex small molecules.
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Affiliation(s)
- Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Zhijie Deng
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
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48
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Kawamura S, Sekine D, Sodeoka M. Synthesis of CF3-containing oxazolines via trifluoromethylation of allylamides with Togni reagent in the presence of alkali metal iodides. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.07.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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49
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Vasconcelos SNS, Menezes da Silva VH, Braga AAC, Shamim A, Souza FB, Pimenta DC, Stefani HA. 3-Alkenyltyrosines Accessed by Suzuki-Miyaura Coupling: A Key Intermediate in the Synthesis and Mechanistic Study of Povarov Multicomponent Reactions. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700154] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Stanley N. S. Vasconcelos
- Departamento de Farmácia; Faculdade de Ciências Farmacêuticas; Universidade de São Paulo; São Paulo, SP Brasil
| | | | | | - Anwar Shamim
- Instituto de Química; Universidade de São Paulo; São Paulo, SP Brasil
| | - Frederico B. Souza
- Departamento de Farmácia; Faculdade de Ciências Farmacêuticas; Universidade de São Paulo; São Paulo, SP Brasil
| | | | - Hélio A. Stefani
- Departamento de Farmácia; Faculdade de Ciências Farmacêuticas; Universidade de São Paulo; São Paulo, SP Brasil
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50
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Wei F, Zhou T, Ma Y, Tung CH, Xu Z. Bench-Stable 5-Stannyl Triazoles by a Copper(I)-Catalyzed Interrupted Click Reaction: Bridge to Trifluoromethyltriazoles and Trifluoromethylthiotriazoles. Org Lett 2017; 19:2098-2101. [DOI: 10.1021/acs.orglett.7b00701] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Fang Wei
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Tong Zhou
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Yudao Ma
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Chen-Ho Tung
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
| | - Zhenghu Xu
- Key
Lab for Colloid and Interface Chemistry of Education Ministry, School
of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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