1
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Béke F, Csenki JT, Novák Z. Fluoroalkylations and Fluoroalkenylations with Iodonium Salts. CHEM REC 2023; 23:e202300083. [PMID: 37129578 DOI: 10.1002/tcr.202300083] [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: 03/02/2023] [Revised: 04/17/2023] [Indexed: 05/03/2023]
Abstract
Synthesis and applications of fluoroalkyl and fluoroalkenyliodonium salts are summarized in this account article, focusing preferably to the reagents designed in our laboratory in the last decade. Among these reagents trifluoroethyl(aryl)iodonium salts have been used most frequently to build carbon-carbon and carbon-heteroatom bonds in simple nucleophilic substitutions and through transition metal catalyzed coupling reactions. Iodonium salts equipped with unsaturated fluorinated function showed diverse reactivity due to their electron deficient character, and these molecular motifs enable cycloadditions and nucleophilic additions to prepare fluorinated carbo- and heterocyclic molecules. Beyond the overview of existing transformations, with the presented collection, we aim to inspire future developments of iodonium reagents and their application in organic synthesis.
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Affiliation(s)
- Ferenc Béke
- Catalysis and Organic Synthesis Research Group, Institute of Chemistry., Eötvös Loránd University, Pázmány Péter stny. 1/a, Budapest, 1117, Hungary
| | - János T Csenki
- Catalysis and Organic Synthesis Research Group, Institute of Chemistry., Eötvös Loránd University, Pázmány Péter stny. 1/a, Budapest, 1117, Hungary
| | - Zoltán Novák
- Catalysis and Organic Synthesis Research Group, Institute of Chemistry., Eötvös Loránd University, Pázmány Péter stny. 1/a, Budapest, 1117, Hungary
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2
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Diastereo-selective synthesis of CF3-substituted epoxide via in situ generated trifluoroethylideneiodonium ylide. GREEN SYNTHESIS AND CATALYSIS 2022. [DOI: 10.1016/j.gresc.2022.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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3
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Ruyet L, Lapuh MI, Koshti VS, Földesi T, Jubault P, Poisson T, Novák Z, Besset T. Z-Selective Pd-catalyzed 2,2,2-trifluoroethylation of acrylamides at room temperature. Chem Commun (Camb) 2021; 57:6241-6244. [PMID: 34079967 DOI: 10.1039/d1cc02007b] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A straightforward 2,2,2-trifluoroethylation of acrylamides by Pd-catalyzed C-H bond activation was reported by using a fluorinated hypervalent iodine reagent as a coupling partner. At room temperature, this additive-free approach allowed the synthesis of Z-2,2,2-trifluoroethylated acrylamides (19 examples, up to 73% yield) in a stereoselective manner. Under these mild reaction conditions, the methodology turned out to be functional group tolerant and mechanistic studies gave us a better understanding of the transformation.
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Affiliation(s)
- Louise Ruyet
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Maria I Lapuh
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Vijay S Koshti
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Tamás Földesi
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös Loránd University, Faculty of Science, Budapest H-1117, Hungary
| | - Philippe Jubault
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
| | - Thomas Poisson
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France. and Institut Universitaire de France, Paris 75231, France
| | - Zoltán Novák
- ELTE "Lendület" Catalysis and Organic Synthesis Research Group, Institute of Chemistry, Eötvös Loránd University, Faculty of Science, Budapest H-1117, Hungary
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen 76000, France.
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4
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Zhou J, Bao Z, Wu P, Chen C. Preparation and Synthetic Application of Naproxen-Containing Diaryliodonium Salts. Molecules 2021; 26:3240. [PMID: 34071240 PMCID: PMC8198133 DOI: 10.3390/molecules26113240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 05/17/2021] [Accepted: 05/18/2021] [Indexed: 11/16/2022] Open
Abstract
The synthesis of naproxen-containing diaryliodonium salts has been realized from naproxen methyl ester and ArI(OH)OTs activated by trimethylsilyl trifluoromethanesulfonate (TMSOTf) in a solvent mixture comprising dichloromethane and 2,2,2-trifluoroethanol (TFE). Those iodonium salts have been successfully used in the functionalization of an aromatic ring of naproxen methyl ester, including fluorination, iodination, alkynylation, arylation, thiophenolation, and amination and esterification reactions. Moreover, further hydrolysis of the obtained 5-iodo-naproxen methyl ester afforded 5-iodo-naproxen.
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Affiliation(s)
- Jun Zhou
- School of Biotechnology and Health Sciences, International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529000, China;
| | - Zhiyuan Bao
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China;
| | - Panpan Wu
- School of Biotechnology and Health Sciences, International Healthcare Innovation Institute (Jiangmen), Wuyi University, Jiangmen 529000, China;
| | - Chao Chen
- Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, China;
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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5
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Wu W, Luo B, You Y, Weng Z. Copper-catalyzed one-pot synthesis of 2-(2,2,2-trifluoroethyl)-substituted benzofused heterocycles. Org Chem Front 2021. [DOI: 10.1039/d1qo00157d] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A method for copper-catalyzed synthesis of 2-trifluoroethyl-substituted benzofurans and indoles from the reaction of salicylaldehyde/2-aminobenzaldehyde p-tosylhydrazones with 2-bromo-3,3,3-trifluoropropene has been developed.
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Affiliation(s)
- Wei Wu
- Key Laboratory of Molecule Synthesis and Function Discovery
- and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Beibei Luo
- Key Laboratory of Molecule Synthesis and Function Discovery
- and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Yi You
- Key Laboratory of Molecule Synthesis and Function Discovery
- and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials
- College of Chemistry
- Fuzhou University
- Fuzhou
| | - Zhiqiang Weng
- Key Laboratory of Molecule Synthesis and Function Discovery
- and Fujian Provincial Key Laboratory of Electrochemical Energy Storage Materials
- College of Chemistry
- Fuzhou University
- Fuzhou
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6
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Nozawa‐Kumada K, Osawa S, Ojima T, Noguchi K, Shigeno M, Kondo Y. Transition‐Metal‐Free Trifluoromethylation of Benzyl Bromides Using Trifluoromethyltrimethylsilane and CsF in 1,2‐Dimethoxyethane. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000124] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Kanako Nozawa‐Kumada
- Graduate School of Pharmaceutical SciencesTohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Sayuri Osawa
- Graduate School of Pharmaceutical SciencesTohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Takuto Ojima
- Graduate School of Pharmaceutical SciencesTohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Koto Noguchi
- Graduate School of Pharmaceutical SciencesTohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Masanori Shigeno
- Graduate School of Pharmaceutical SciencesTohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
| | - Yoshinori Kondo
- Graduate School of Pharmaceutical SciencesTohoku University 6-3 Aoba, Aramaki, Aoba-ku Sendai 980-8578 Japan
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7
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Zhang S, Weniger F, Kreyenschulte CR, Lund H, Bartling S, Neumann H, Ellinger S, Taeschler C, Beller M. Towards a practical perfluoroalkylation of (hetero)arenes with perfluoroalkyl bromides using cobalt nanocatalysts. Catal Sci Technol 2020. [DOI: 10.1039/c9cy02460c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This paper report a convenient methodology for perfluoroalkylation including trifluoromethylation of (hetero)arenes with perfluoroalkyl bromides using a specific cobalt-based nanocatalyst.
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Affiliation(s)
- Shaoke Zhang
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - Florian Weniger
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | | | - Henrik Lund
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - Stephan Bartling
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | - Helfried Neumann
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
| | | | | | - Matthias Beller
- Leibniz-Institut für Katalyse an der Universität Rostock e.V
- 18059 Rostock
- Germany
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8
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Metal- and additive-free cascade trifluoroethylation/cyclization of organic isoselenocyanates by phenyl(2,2,2-trifluoroethyl)iodonium triflate. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.109360] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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9
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Zhao Z, Ma KCY, Legault CY, Murphy GK. Denitrogenative Hydrotrifluoromethylation of Benzaldehyde Hydrazones: Synthesis of (2,2,2-Trifluoroethyl)arenes. Chemistry 2019; 25:11240-11245. [PMID: 31276254 DOI: 10.1002/chem.201902818] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 07/03/2019] [Indexed: 12/20/2022]
Abstract
Reacting hydrazones of arylaldehydes with Togni's CF3 -benziodoxolone reagent, in the presence of potassium hydroxide and cesium fluoride, induces a denitrogenative hydrotrifluoromethylation event to produce (2,2,2-trifluoroethyl)arenes. This novel reaction was tolerant to many electronically-diverse functional groups and substitution patterns, as well as naphthyl- and heteroaryl-derived substrates. Advantages of this process include the easy access to hydrazone precursors on a large scale, speed and operational simplicity, and being transition metal-free.
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Affiliation(s)
- Zhensheng Zhao
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON, N2L3G1, Canada
| | - Kevin C Y Ma
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON, N2L3G1, Canada
| | - Claude Y Legault
- Department of Chemistry, Université de Sherbrooke, Sherbrooke, Québec, J1K2R1, Canada
| | - Graham K Murphy
- Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, ON, N2L3G1, Canada
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10
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Han Q, Hu X, Xue X, Zhao C, Zhang C. Palladium‐Catalyzed Trifluoroethylation of Benzo[
h
]quinoline Derivatives by Mesityl(2,2,2‐trifluoroethyl)iodonium Triflate. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900030] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Qiu‐Yan Han
- School of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology 205 Luoshi Road Wuhan 430070 China
| | - Xiaoxiao Hu
- State Key Laboratory of Elemento-organic Chemistry, College of ChemistryNankai University Tianjin 300071 China
| | - Xiao‐Song Xue
- State Key Laboratory of Elemento-organic Chemistry, College of ChemistryNankai University Tianjin 300071 China
| | - Cheng‐Long Zhao
- School of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology 205 Luoshi Road Wuhan 430070 China
| | - Cheng‐Pan Zhang
- School of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology 205 Luoshi Road Wuhan 430070 China
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11
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Li Z, Dong J, Wang J, Yang DY, Weng Z. Elemental sulfur-promoted one-pot synthesis of 2-(2,2,2-trifluoroethyl)benzoxazoles and their derivatives. Chem Commun (Camb) 2019; 55:13132-13135. [DOI: 10.1039/c9cc06822h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
An elemental sulfur promoted one-pot synthesis of 2-(2,2,2-trifluoroethyl)benzoxazole derivatives from the reaction of o-aminophenols, thiols, and anilines with 2-bromo-3,3,3-trifluoropropene is reported.
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Affiliation(s)
- Zhengyu Li
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Jingnan Dong
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Junwen Wang
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
| | - Ding-Yah Yang
- Department of Chemistry
- Tunghai University
- Taichung City 40704
- Taiwan
| | - Zhiqiang Weng
- State Key Laboratory of Photocatalysis on Energy and Environment, and Key Laboratory of Molecule Synthesis and Function Discovery
- College of Chemistry
- Fuzhou University
- Fuzhou
- China
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12
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Zhao CL, Han QY, Zhang CP. TfOH-Promoted Transition-Metal-Free Cascade Trifluoroethylation/Cyclization of Organic Isothiocyanates by Phenyl(2,2,2-trifluoroethyl)iodonium Triflate. Org Lett 2018; 20:6480-6484. [DOI: 10.1021/acs.orglett.8b02793] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cheng-Long Zhao
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, China
| | - Qiu-Yan Han
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, China
| | - Cheng-Pan Zhang
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 205 Luoshi Road, Wuhan 430070, China
- Department of Chemistry, College of Basic Medicine, Army Medical University, Shapingba, Chongqing 400038, China
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13
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Pan XY, Zhao Y, Qu HA, Lin JH, Hang XC, Xiao JC. Tri- and di-fluoroethylation of alkenes by visible light photoredox catalysis. Org Chem Front 2018. [DOI: 10.1039/c8qo00082d] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The photoredox-catalyzed solvent-dependent tri-/di-fluoroethylation of alkenes with sulfonium salts (Ph2S+CH2RF TfO−) (RF = CF3 or HCF2) is described.
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Affiliation(s)
- Xiao-Yang Pan
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM)
- Nanjing Tech University (NanjingTech)
- Nanjing 211800
- China
- Key Laboratory of Organofluorine Chemistry
| | - Yue Zhao
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM)
- Nanjing Tech University (NanjingTech)
- Nanjing 211800
- China
- Key Laboratory of Organofluorine Chemistry
| | | | - Jin-Hong Lin
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai 200032
| | - Xiao-Chun Hang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM)
- Nanjing Tech University (NanjingTech)
- Nanjing 211800
- China
| | - Ji-Chang Xiao
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- University of Chinese Academy of Sciences
- Chinese Academy of Sciences
- Shanghai 200032
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14
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Zhao CL, Yang J, Han ZZ, Zhang CP. Structure-dependent selective O - or C -trifluoroethylation of 1,3-dicarbonyls by mesityl(2,2,2-trifluoroethyl)iodonium triflate. J Fluor Chem 2017. [DOI: 10.1016/j.jfluchem.2017.09.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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Maraswami M, Pankajakshan S, Chen G, Loh TP. Palladium-Catalyzed Direct C-H Trifluoroethylation of Aromatic Amides. Org Lett 2017; 19:4223-4226. [PMID: 28782962 DOI: 10.1021/acs.orglett.7b01859] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A simple and direct C-H trifluoroethylation of aromatic amides has been developed. The protocol is applicable to a variety of aromatic amides, including ones derived from amino acids. The developed method can be used for further modifications of peptides. Preliminary mechanistic studies have been done by isolating the reaction intermediate.
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Affiliation(s)
- Manikantha Maraswami
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
| | - Sreekumar Pankajakshan
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
| | - Gang Chen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, College of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , Nanjing, Jiangsu 210009, P. R. China.,Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University , Singapore 637371.,Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China , Hefei 230026, China
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16
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Andrews KG, Faizova R, Denton RM. A practical and catalyst-free trifluoroethylation reaction of amines using trifluoroacetic acid. Nat Commun 2017. [PMID: 28649981 PMCID: PMC5490195 DOI: 10.1038/ncomms15913] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Amines are a fundamentally important class of biologically active compounds and the ability to manipulate their physicochemical properties through the introduction of fluorine is of paramount importance in medicinal chemistry. Current synthesis methods for the construction of fluorinated amines rely on air and moisture sensitive reagents that require special handling or harsh reductants that limit functionality. Here we report practical, catalyst-free, reductive trifluoroethylation reactions of free amines exhibiting remarkable functional group tolerance. The reactions proceed in conventional glassware without rigorous exclusion of either moisture or oxygen, and use trifluoroacetic acid as a stable and inexpensive fluorine source. The new methods provide access to a wide range of medicinally relevant functionalized tertiary β-fluoroalkylamine cores, either through direct trifluoroethylation of secondary amines or via a three-component coupling of primary amines, aldehydes and trifluoroacetic acid. A reduction of in situ-generated silyl ester species is proposed to account for the reductive selectivity observed. Amino and trifluoromethyl groups are ubiquitous within medicinal chemistry, but synthesis of fluoroalkylamines normally requires harsh conditions or sensitive reagents. Here the authors report an operationally simple, catalyst-free procedure for the trifluoroethylation of primary and secondary amines.
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Affiliation(s)
- Keith G Andrews
- School of Chemistry, University Park, University of Nottingham, Nottingham NG7 2RD, UK
| | - Radmila Faizova
- School of Chemistry, University Park, University of Nottingham, Nottingham NG7 2RD, UK
| | - Ross M Denton
- School of Chemistry, University Park, University of Nottingham, Nottingham NG7 2RD, UK
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17
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Hofmann J, Gans E, Clark T, Heinrich MR. Radical Arylation of Anilines and Pyrroles via Aryldiazotates. Chemistry 2017; 23:9647-9656. [PMID: 28440884 DOI: 10.1002/chem.201701429] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Indexed: 12/15/2022]
Abstract
The radical arylation of anilines and pyrroles can be achieved under transition-metal- and catalyst-free conditions by using aryldiazotates in strongly alkaline aqueous solutions. The aryldiazotates act as protected diazonium ions, which do not undergo azo coupling with electron-rich aromatic substrates, but can still serve as an aryl radical source at slightly elevated temperatures. Based on an improved preparation of aryldiazotates in aqueous solution, homolytic aromatic substitutions of anilines and pyrroles were conducted with good overall yields and high regioselectivity. Moreover, DFT calculations provided further mechanistic insights.
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Affiliation(s)
- Josefa Hofmann
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Eva Gans
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
| | - Timothy Clark
- Computer-Chemie-Centrum, Interdisciplinary Center for Molecular Materials, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstraße 25, 91052, Erlangen, Germany
| | - Markus R Heinrich
- Department of Chemistry and Pharmacy, Pharmaceutical Chemistry, Friedrich-Alexander Universität Erlangen-Nürnberg, Schuhstraße 19, 91052, Erlangen, Germany
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18
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Liu NW, Liang S, Manolikakes G. Visible-Light Photoredox-Catalyzed Aminosulfonylation of Diaryliodonium Salts with Sulfur Dioxide and Hydrazines. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601341] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Nai-Wei Liu
- Institute of Organic Chemistry and Chemical Biology; Goethe-University Frankfurt; Max-von-Laue-Str. 7 60438 Frankfurt/Main Germany
| | - Shuai Liang
- Institute of Organic Chemistry and Chemical Biology; Goethe-University Frankfurt; Max-von-Laue-Str. 7 60438 Frankfurt/Main Germany
| | - Georg Manolikakes
- Institute of Organic Chemistry and Chemical Biology; Goethe-University Frankfurt; Max-von-Laue-Str. 7 60438 Frankfurt/Main Germany
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19
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Kovács S, Tóth BL, Borsik G, Bihari T, May NV, Stirling A, Novák Z. Directortho-Trifluoroethylation of Aromatic Ureas by Palladium Catalyzed C-H activation: A Missing Piece of Aromatic Substitutions. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201601136] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Szabolcs Kovács
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry.; Eötvös Loránd University; Pázmány Péter stny. 1/a Budapest 1117 Hungary
| | - Balázs L. Tóth
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry.; Eötvös Loránd University; Pázmány Péter stny. 1/a Budapest 1117 Hungary
| | - Gábor Borsik
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry.; Eötvös Loránd University; Pázmány Péter stny. 1/a Budapest 1117 Hungary
| | - Tamás Bihari
- Research Centre for Natural Sciences of the; Hungarian Academy of Sciences, Institute of Organic Chemistry; Magyar Tudósok körútja 2. H- 1117 Budapest Hungary
| | - Nóra V. May
- Research Centre for Natural Sciences of the; Hungarian Academy of Sciences, Institute of Organic Chemistry; Magyar Tudósok körútja 2. H- 1117 Budapest Hungary
| | - András Stirling
- Research Centre for Natural Sciences of the; Hungarian Academy of Sciences, Institute of Organic Chemistry; Magyar Tudósok körútja 2. H- 1117 Budapest Hungary
| | - Zoltán Novák
- MTA-ELTE “Lendület” Catalysis and Organic Synthesis Research Group; Institute of Chemistry.; Eötvös Loránd University; Pázmány Péter stny. 1/a Budapest 1117 Hungary
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