201
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Michelin C, Hoffmann N. Photosensitization and Photocatalysis—Perspectives in Organic Synthesis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b03050] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Clément Michelin
- CNRS, Université de Reims Champagne-Ardenne, ICMR, Groupe de Photochimie, UFR Sciences, B.P. 1039, 51687 Reims, France
| | - Norbert Hoffmann
- CNRS, Université de Reims Champagne-Ardenne, ICMR, Groupe de Photochimie, UFR Sciences, B.P. 1039, 51687 Reims, France
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202
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Revathi L, Ravindar L, Fang WY, Rakesh KP, Qin HL. Visible Light-Induced C−H Bond Functionalization: A Critical Review. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800736] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Lekkala Revathi
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan, Hubei Province 430070 People's Republic of China
| | - Lekkala Ravindar
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan, Hubei Province 430070 People's Republic of China
| | - Wan-Yin Fang
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan, Hubei Province 430070 People's Republic of China
| | - K. P. Rakesh
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan, Hubei Province 430070 People's Republic of China
| | - Hua-Li Qin
- State Key Laboratory of Silicate Materials for Architectures; and School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 205 Luoshi Road Wuhan, Hubei Province 430070 People's Republic of China
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203
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Sultan S, Shah BA. Carbon‐Carbon and Carbon‐Heteroatom Bond Formation Reactions Using Unsaturated Carbon Compounds. CHEM REC 2018; 19:644-660. [DOI: 10.1002/tcr.201800095] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/12/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Shaista Sultan
- Natural Product Chemistry Division and AcSIRCSIR-Indian Institute of Integrative Medicine Jammu- 180001
| | - Bhahwal Ali Shah
- Natural Product Chemistry Division and AcSIRCSIR-Indian Institute of Integrative Medicine Jammu- 180001
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204
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Fan X, Wang Q, Wei Y, Shi M. Catalyst-free geminal aminofluorination of ortho-sulfonamide-tethered alkylidenecyclopropanes via a Wagner-Meerwein rearrangement. Chem Commun (Camb) 2018; 54:10503-10506. [PMID: 30160273 DOI: 10.1039/c8cc05634j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A catalyst-free intramolecular geminal aminofluorination of ortho-sulfonamide-tethered alkylidenecyclopropanes has been developed. The reaction proceeded through two SET processes with Selectfluor to give a fluorinated cyclopropylcarbinyl cation and a further Wagner-Meerwein rearrangement to generate a cyclobutyl carbocation, which undergoes intramolecular nucleophilic capture by amide to forge fluorinated cyclobuta[b]indoline derivatives. A polycyclic multi-fluorinated byproduct was also formed through a Ritter-type reaction in some cases.
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Affiliation(s)
- Xing Fan
- State Key Laboratory of Organometallic Chemistry, Center for Excellence in Molecular Synthesis, University of Chinese Academy of Sciences, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China.
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205
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He X, Gao X, Zhang X. Nickel-Catalyzed Difluoroalkylation of (Hetero)aryl Bromides with Unactivated 1-Bromo-1,1-difluoroalkanes. CHINESE J CHEM 2018. [DOI: 10.1002/cjoc.201800276] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xu He
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
| | - Xing Gao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
| | - Xingang Zhang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
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206
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Yang Q, Cabrera PJ, Li X, Sheng M, Wang NX. Safety Evaluation of the Copper-Mediated Cross-Coupling of 2-Bromopyridines with Ethyl Bromodifluoroacetate. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00261] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qiang Yang
- Process Chemistry, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Pablo J. Cabrera
- Process Chemistry, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Xiaoyong Li
- Process Development, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Min Sheng
- Reactive Chemicals, Dow AgroSciences, Midland, Michigan 48667, United States
| | - Nick X. Wang
- Discovery Chemistry, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
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207
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Shen Y, Gu Y, Martin R. sp 3 C-H Arylation and Alkylation Enabled by the Synergy of Triplet Excited Ketones and Nickel Catalysts. J Am Chem Soc 2018; 140:12200-12209. [PMID: 30184423 DOI: 10.1021/jacs.8b07405] [Citation(s) in RCA: 227] [Impact Index Per Article: 37.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Triplet ketone sensitizers are of central importance within the realm of photochemical transformations. Although the radical-type character of triplet excited states of diaryl ketones suggests the viability for triggering hydrogen-atom transfer (HAT) and single-electron transfer (SET) processes, among others, their use as multifaceted catalysts in C-C bond-formation via sp3 C-H functionalization of alkane feedstocks still remains rather unexplored. Herein, we unlock a modular photochemical platform for forging C( sp3)-C( sp2) and C( sp3)-C( sp3) linkages from abundant alkane sp3 C-H bonds as functional handles using the synergy between nickel catalysts and simple, cheap and modular diaryl ketones. This method is distinguished by its wide scope that is obtained from cheap catalysts and starting precursors, thus complementing existing inner-sphere C-H functionalization protocols or recent photoredox scenarios based on iridium polypyridyl complexes. Additionally, such a platform provides a new strategy for streamlining the synthesis of complex molecules with high levels of predictable site-selectivity and preparative utility. Mechanistic experiments suggest that sp3 C-H abstraction occurs via HAT from the ketone triplet excited state. We believe this study will contribute to a more systematic utilization of triplet excited ketones as catalysts in metallaphotoredox scenarios.
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Affiliation(s)
- Yangyang Shen
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Yiting Gu
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,ICREA , Passeig Lluïs Companys 23 , 08010 Barcelona , Spain
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208
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Zhu SQ, Liu YL, Li H, Xu XH, Qing FL. Direct and Regioselective C–H Oxidative Difluoromethylation of Heteroarenes. J Am Chem Soc 2018; 140:11613-11617. [DOI: 10.1021/jacs.8b08135] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Sheng-Qing Zhu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 345 LinglingLu, Shanghai 200032, China
| | - Yin-Li Liu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 345 LinglingLu, Shanghai 200032, China
| | - Huan Li
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North RenminLu, Shanghai 201620, China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 345 LinglingLu, Shanghai 200032, China
| | - Feng-Ling Qing
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Science, 345 LinglingLu, Shanghai 200032, China
- College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North RenminLu, Shanghai 201620, China
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209
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Wang L, Xia Y, Bergander K, Studer A. Remote Site-Specific Radical Alkynylation of Unactivated C–H Bonds. Org Lett 2018; 20:5817-5820. [DOI: 10.1021/acs.orglett.8b02514] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Lin Wang
- Institute of Organic Chemistry, University of Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Yong Xia
- Institute of Organic Chemistry, University of Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Klaus Bergander
- Institute of Organic Chemistry, University of Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Institute of Organic Chemistry, University of Münster, Corrensstrasse 40, 48149 Münster, Germany
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210
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Motohashi H, Mikami K. Nickel-Catalyzed Aromatic Cross-Coupling Difluoromethylation of Grignard Reagents with Difluoroiodomethane. Org Lett 2018; 20:5340-5343. [DOI: 10.1021/acs.orglett.8b02264] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hirotaka Motohashi
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
| | - Koichi Mikami
- Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo 152-8552, Japan
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211
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Meanwell M, Lehmann J, Eichenberger M, Martin RE, Britton R. Synthesis of acyl fluorides via photocatalytic fluorination of aldehydic C-H bonds. Chem Commun (Camb) 2018; 54:9985-9988. [PMID: 30123905 DOI: 10.1039/c8cc06375c] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Acyl fluorides are versatile acylating agents owing to their unique stability. Their synthesis, however, can present challenges and is typically accomplished through deoxyfluorination of carboxylic acids. Here, we demonstrate that acyl fluorides can be prepared directly from aldehydes via a C(sp2)-H fluorination reaction involving the inexpensive photocatalyst sodium decatungstate and electrophilic fluorinating agent N-fluorobenzenesulfonimide. This convenient fluorination strategy enables direct conversion of aliphatic and aromatic aldehydes into acylating agents.
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Affiliation(s)
- Michael Meanwell
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.
| | - Johannes Lehmann
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.
| | - Marc Eichenberger
- Medicinal Chemistry, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, CH-4070 Basel, Switzerland.
| | - Rainer E Martin
- Medicinal Chemistry, Roche Pharma Research and Early Development (pRED), Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, Grenzacherstrasse 124, CH-4070 Basel, Switzerland.
| | - Robert Britton
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6, Canada.
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212
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Guan H, Sun S, Mao Y, Chen L, Lu R, Huang J, Liu L. Iron(II)-Catalyzed Site-Selective Functionalization of Unactivated C(sp3
)−H Bonds Guided by Alkoxyl Radicals. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201806434] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Honghao Guan
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Shutao Sun
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Ying Mao
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Lei Chen
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
| | - Ran Lu
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Jiancheng Huang
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
| | - Lei Liu
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
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213
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Guan H, Sun S, Mao Y, Chen L, Lu R, Huang J, Liu L. Iron(II)-Catalyzed Site-Selective Functionalization of Unactivated C(sp3
)−H Bonds Guided by Alkoxyl Radicals. Angew Chem Int Ed Engl 2018; 57:11413-11417. [DOI: 10.1002/anie.201806434] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/16/2018] [Indexed: 01/17/2023]
Affiliation(s)
- Honghao Guan
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Shutao Sun
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Ying Mao
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Lei Chen
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
| | - Ran Lu
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
| | - Jiancheng Huang
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
| | - Lei Liu
- School of Pharmaceutical Sciences; Shandong University; Jinan 250012 P. R. China
- School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
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214
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Geri JB, Wade Wolfe MM, Szymczak NK. The Difluoromethyl Group as a Masked Nucleophile: A Lewis Acid/Base Approach. J Am Chem Soc 2018; 140:9404-9408. [DOI: 10.1021/jacs.8b06093] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Jacob B. Geri
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
| | - Michael M. Wade Wolfe
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
| | - Nathaniel K. Szymczak
- Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, Michigan 48109, United States
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215
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Nocera G, Young A, Palumbo F, Emery KJ, Coulthard G, McGuire T, Tuttle T, Murphy JA. Electron Transfer Reactions: KO tBu (but not NaO tBu) Photoreduces Benzophenone under Activation by Visible Light. J Am Chem Soc 2018; 140:9751-9757. [PMID: 29996048 DOI: 10.1021/jacs.8b06089] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Long-standing controversial reports of electron transfer from KO tBu to benzophenone have been investigated and resolved. The mismatch in the oxidation potential of KO tBu (+0.10 V vs SCE in DMF) and the first reduction potential of benzophenone (of many values cited in the literature, the least negative value is -1.31 V vs SCE in DMF), preclude direct electron transfer. Experimental and computational results now establish that a complex is formed between the two reagents, with the potassium ion providing the linkage, which markedly shifts the absorption spectrum to provide a tail in the visible light region. Photoactivation at room temperature by irradiation at defined wavelength (365 or 400 nm), or even by winter daylight, leads to the development of the blue color of the potassium salt of benzophenone ketyl, whereas no reaction is observed when the reaction mixture is maintained in darkness. So, no electron transfer occurs in the ground state. However, when photoexcited, electron transfer occurs within a complex formed from benzophenone and KO tBu. TDDFT studies match experimental findings and also define the electronic transition within the complex as n → π*, originating on the butoxide oxygen. Computation and experiment also align in showing that this reaction is selective for KO tBu; no such effect occurs with NaO tBu, providing the first case where such alkali metal ion selectivity is rationalized in detail. Chemical evidence is provided for the photoactivated electron transfer from KO tBu to benzophenone: tert-butoxyl radicals are formed and undergo fragmentation to form (acetone and) methyl radicals, some of which are trapped by benzophenone. Likewise, when KOC(Et)3 is used in place of KO tBu, then ethylation of benzophenone is seen. Further evidence of electron transfer was seen when the reaction was conducted in benzene, in the presence of p-iodotoluene; this triggered BHAS coupling to form 4-methylbiphenyl in 74% yield.
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Affiliation(s)
- Giuseppe Nocera
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Allan Young
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Fabrizio Palumbo
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Katie J Emery
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Graeme Coulthard
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - Thomas McGuire
- Medicinal Chemistry, Oncology, IMED Biotech Unit , AstraZeneca , 319 Milton Road , Cambridge CB4 0WG , U.K
| | - Tell Tuttle
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
| | - John A Murphy
- Department of Pure and Applied Chemistry , University of Strathclyde , 295 Cathedral Street , Glasgow , G1 1XL , U.K
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216
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Paeth M, Carson W, Luo JH, Tierney D, Cao Z, Cheng MJ, Liu W. Copper-Mediated Trifluoromethylation of Benzylic Csp 3 -H Bonds. Chemistry 2018; 24:11559-11563. [PMID: 29905985 DOI: 10.1002/chem.201802766] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Indexed: 12/18/2022]
Abstract
Trifluoromethyl-containing compounds play a significant role in medicinal chemistry, materials and fine chemistry. Although direct C-H trifluoromethylation has been achieved on Csp2 -H bonds, direct conversion of Csp3 -H bonds to Csp3 -CF3 remains challenging. We report herein an efficient protocol for the selective trifluoromethylation of benzylic C-H bonds. This process is mediated by a combination CuIII -CF3 species and persulfate salts. A wide range of methylarenes can be selectively trifluoromethylated at the benzylic positions. A combination of experimental and theoretical mechanistic studies suggests that the reaction involves a radical intermediate and a CuIII -CF3 species as the CF3 transfer reagent.
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Affiliation(s)
- Matthew Paeth
- Department of Chemistry and Biochemistry, Miami University, 651. E. High Street, Oxford, Ohio, 45056, USA
| | - William Carson
- Department of Chemistry and Biochemistry, Miami University, 651. E. High Street, Oxford, Ohio, 45056, USA
| | - Jheng-Hua Luo
- Department of Chemistry, National Cheng Kung University, 1 University Road, Tainan City, Taiwan
| | - David Tierney
- Department of Chemistry and Biochemistry, Miami University, 651. E. High Street, Oxford, Ohio, 45056, USA
| | - Zhi Cao
- Synfuels China, Beijing, 100195 and Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, P. R. China
| | - Mu-Jeng Cheng
- Department of Chemistry, National Cheng Kung University, 1 University Road, Tainan City, Taiwan
| | - Wei Liu
- Department of Chemistry and Biochemistry, Miami University, 651. E. High Street, Oxford, Ohio, 45056, USA
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217
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Xu W, Ma J, Yuan XA, Dai J, Xie J, Zhu C. Synergistic Catalysis for the Umpolung Trifluoromethylthiolation of Tertiary Ethers. Angew Chem Int Ed Engl 2018; 57:10357-10361. [DOI: 10.1002/anie.201805927] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Wentao Xu
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Junyang Ma
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Xiang-Ai Yuan
- School of Chemistry and Chemical Engineering; Qufu Normal University; Qufu 273165 P. R. China
| | - Jie Dai
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Shanghai 200032 P. R. China
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218
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Xu W, Ma J, Yuan XA, Dai J, Xie J, Zhu C. Synergistic Catalysis for the Umpolung Trifluoromethylthiolation of Tertiary Ethers. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805927] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Wentao Xu
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Junyang Ma
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Xiang-Ai Yuan
- School of Chemistry and Chemical Engineering; Qufu Normal University; Qufu 273165 P. R. China
| | - Jie Dai
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry; Jiangsu Key Laboratory of Advanced Organic Materials; National Demonstration Center for Experimental Chemistry, Education; School of Chemistry and Chemical Engineering; Nanjing University; Nanjing 210023 P. R. China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Shanghai 200032 P. R. China
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219
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Meanwell M, Adluri BS, Yuan Z, Newton J, Prevost P, Nodwell MB, Friesen CM, Schaffer P, Martin RE, Britton R. Direct heterobenzylic fluorination, difluorination and trifluoromethylthiolation with dibenzenesulfonamide derivatives. Chem Sci 2018; 9:5608-5613. [PMID: 30061993 PMCID: PMC6050628 DOI: 10.1039/c8sc01221k] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/25/2018] [Indexed: 12/14/2022] Open
Abstract
Functionalization of heterocyclic scaffolds with mono- or difluoroalkyl groups provides unique opportunities to modulate drug pKa, influence potency and membrane permeability, and attenuate metabolism. While advances in the addition of fluoroalkyl radicals to heterocycles have been made, direct C(sp3)-H heterobenzylic fluorination is comparatively unexplored. Here we demonstrate both mono- and difluorination of a range of alkyl heterocycles using a convenient process that relies on transient sulfonylation by the electrophilic fluorinating agent N-fluorobenzenesulfonimide. We also report heterobenzylic trifluoromethylthiolation and 18F-fluorination, providing a suite of reactions for late-stage C(sp3)-H functionalization of drug leads and radiotracer discovery.
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Affiliation(s)
- Michael Meanwell
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Bharani Shashank Adluri
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Zheliang Yuan
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
- Life Science Division , TRIUMF , Vancouver , BC V6T 2A3 , Canada
| | - Josiah Newton
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
- Department of Chemistry , Trinity Western University , Langley , British Columbia V2Y 1Y1 , Canada
| | - Philippe Prevost
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Matthew B Nodwell
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Chadron M Friesen
- Department of Chemistry , Trinity Western University , Langley , British Columbia V2Y 1Y1 , Canada
| | - Paul Schaffer
- Life Science Division , TRIUMF , Vancouver , BC V6T 2A3 , Canada
| | - Rainer E Martin
- Medicinal Chemistry , Roche Pharma Research and Early Development (pRED) , Roche Innovation Center Basel , F. Hoffmann-La Roche Ltd , Grenzacherstrasse 124 , CH-4070 Basel , Switzerland
| | - Robert Britton
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
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220
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Bume DD, Harry SA, Lectka T, Pitts CR. Catalyzed and Promoted Aliphatic Fluorination. J Org Chem 2018; 83:8803-8814. [PMID: 29894188 DOI: 10.1021/acs.joc.8b00982] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In the last six years, the direct functionalization of aliphatic C-H (and C-C) bonds through user-friendly, radical-based fluorination reactions has emerged as an exciting research area in fluorine chemistry. Considering the historical narratives about the challenges of developing practical radical fluorination in organic frameworks, notable advancements in controlling both reactivity and selectivity have been achieved during this time. As one of the participants in the field, herein, we a provide brief account of research efforts in our laboratory from the initial discovery of radical monofluorination on unactivated C-H bonds in 2012 to more useful strategies to install fluorine on biologically relevant molecules through directed fluorination methods. In addition, accompanying mechanistic studies that have helped guide reaction design are highlighted in context.
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Affiliation(s)
| | | | | | - Cody Ross Pitts
- Department of Chemistry and Applied Biosciences , ETH Zürich , Vladimir-Prelog-Weg 2 , 8093 Zürich , Switzerland
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221
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Deng W, Feng W, Li Y, Bao H. Merging Visible-Light Photocatalysis and Transition-Metal Catalysis in Three-Component Alkyl-Fluorination of Olefins with a Fluoride Ion. Org Lett 2018; 20:4245-4249. [PMID: 29956940 DOI: 10.1021/acs.orglett.8b01658] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Weili Deng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People’s Republic of China
| | - Weiwei Feng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People’s Republic of China
| | - Yajun Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People’s Republic of China
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
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222
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Marzo L, Pagire SK, Reiser O, König B. Photokatalyse mit sichtbarem Licht: Welche Bedeutung hat sie für die organische Synthese? Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201709766] [Citation(s) in RCA: 306] [Impact Index Per Article: 51.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Leyre Marzo
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Santosh K. Pagire
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Oliver Reiser
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
| | - Burkhard König
- Institut für Organische Chemie; Universität Regensburg; Universitätsstraße 31 93053 Regensburg Deutschland
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223
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Marzo L, Pagire SK, Reiser O, König B. Visible-Light Photocatalysis: Does It Make a Difference in Organic Synthesis? Angew Chem Int Ed Engl 2018; 57:10034-10072. [PMID: 29457971 DOI: 10.1002/anie.201709766] [Citation(s) in RCA: 1127] [Impact Index Per Article: 187.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Revised: 01/12/2018] [Indexed: 12/12/2022]
Abstract
Visible-light photocatalysis has evolved over the last decade into a widely used method in organic synthesis. Photocatalytic variants have been reported for many important transformations, such as cross-coupling reactions, α-amino functionalizations, cycloadditions, ATRA reactions, or fluorinations. To help chemists select photocatalytic methods for their synthesis, we compare in this Review classical and photocatalytic procedures for selected classes of reactions and highlight their advantages and limitations. In many cases, the photocatalytic reactions proceed under milder reaction conditions, typically at room temperature, and stoichiometric reagents are replaced by simple oxidants or reductants, such as air, oxygen, or amines. Does visible-light photocatalysis make a difference in organic synthesis? The prospect of shuttling electrons back and forth to substrates and intermediates or to selectively transfer energy through a visible-light-absorbing photocatalyst holds the promise to improve current procedures in radical chemistry and to open up new avenues by accessing reactive species hitherto unknown, especially by merging photocatalysis with organo- or metal catalysis.
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Affiliation(s)
- Leyre Marzo
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Santosh K Pagire
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Oliver Reiser
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
| | - Burkhard König
- Institut für Organische Chemie, Universität Regensburg, Universitätsstrasse 31, 93053, Regensburg, Germany
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224
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Park H, Verma P, Hong K, Yu JQ. Controlling Pd(IV) reductive elimination pathways enables Pd(II)-catalysed enantioselective C(sp 3)-H fluorination. Nat Chem 2018; 10:755-762. [PMID: 29892027 PMCID: PMC6289870 DOI: 10.1038/s41557-018-0048-1] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 03/22/2018] [Indexed: 11/22/2022]
Abstract
The development of a Pd(II)-catalyzed enantioselective fluorination of C(sp3)–H bonds would offer a new approach to making chiral organofluorines. However, such a strategy is particularly challenging because of the difficulty in differentiating prochiral C(sp3)–H bonds through Pd(II)-insertion, as well as the sluggish reductive elimination involving Pd–F bonds. Here, we report the development of a Pd(II)-catalyzed enantioselective C(sp3)–H fluorination using a chiral transient directing group strategy. In this work, a bulky, amino amide transient directing group was developed to control the stereochemistry of C–H insertion step and selectively promote C(sp3)–F reductive elimination pathway from Pd(IV)–F intermediate. Stereochemical analysis revealed that while the desired C(sp3)–F formation proceeds via an inner-sphere pathway with retention of configuration, the undesired C(sp3)–O formation occurs through an SN2-type mechanism. The elucidation of the dual mechanism allows us to rationalize the profound ligand effect on controlling reductive elimination selectivity from high-valent Pd species.
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Affiliation(s)
- Hojoon Park
- Department of Chemistry, The Scripps Research Institute, La Jolla, California, USA
| | - Pritha Verma
- Department of Chemistry, The Scripps Research Institute, La Jolla, California, USA
| | - Kai Hong
- Department of Chemistry, The Scripps Research Institute, La Jolla, California, USA
| | - Jin-Quan Yu
- Department of Chemistry, The Scripps Research Institute, La Jolla, California, USA.
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225
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Sideri IK, Voutyritsa E, Kokotos CG. Photoorganocatalysis, small organic molecules and light in the service of organic synthesis: the awakening of a sleeping giant. Org Biomol Chem 2018; 16:4596-4614. [PMID: 29888357 DOI: 10.1039/c8ob00725j] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Photocatalysis, the use of light to promote organic transformations, is a field of catalysis that has received limited attention despite existing for over 100 years. With the revolution of photoredox catalysis in 2008, the rebirth or awakening of the field of photoorganocatalysis has brought new ideas and reactions to organic synthesis. This review will focus on the sudden outburst of literature regarding the use of small organic molecules as photocatalysts after 2013. In particular, it will focus on acridinium salts, benzophenones, pyrylium salts, thioxanthone derivatives, phenylglyoxylic acid, BODIPYs, flavin derivatives, and classes of organic molecules as catalysts for the photocatalytic generation of C-C and C-X bonds.
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Affiliation(s)
- Ioanna K Sideri
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| | - Errika Voutyritsa
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Athens 15771, Greece.
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226
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Zhang H, Lei A. Visible-Light-Induced C−H Functionalization and C−C/C−X Bond-Forming Oxidative Cross-Coupling Reactions. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800214] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Heng Zhang
- College of Chemistry and Molecular Sciences; Wuhan University; Wuhan Hubei 430072 P. R. China
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences; Wuhan University; Wuhan Hubei 430072 P. R. China
- State Key Laboratory and Institute of Elemento-Organic Chemistry; Nankai University; Tianjin 300071 P. R. China
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227
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Wappes EA, Vanitcha A, Nagib DA. β C-H di-halogenation via iterative hydrogen atom transfer. Chem Sci 2018; 9:4500-4504. [PMID: 29896392 PMCID: PMC5958344 DOI: 10.1039/c8sc01214h] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Accepted: 04/19/2018] [Indexed: 12/31/2022] Open
Abstract
A radical relay strategy for mono- and di-halogenation (iodination, bromination, and chlorination) of sp3 C-H bonds has been developed. This first example of β C-H di-halogenation is achieved through sequential C-H abstraction by iterative, hydrogen atom transfer (HAT). A double C-H functionalization is enabled by in situ generated imidate radicals, which facilitate selective N˙ to C˙ radical translocation and tunable C-X termination. The versatile, geminal di-iodide products are further elaborated to β ketones and vinyl iodides. Mechanistic experiments explain the unique di-functionalization selectivity of this iterative HAT pathway, wherein the second C-H iodination is twice as fast as the first.
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Affiliation(s)
- Ethan A Wappes
- The Ohio State University , Department of Chemistry and Biochemistry , Columbus , OH 43210 , USA .
| | - Avassaya Vanitcha
- The Ohio State University , Department of Chemistry and Biochemistry , Columbus , OH 43210 , USA .
| | - David A Nagib
- The Ohio State University , Department of Chemistry and Biochemistry , Columbus , OH 43210 , USA .
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228
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Sheng J, Ni HQ, Zhang HR, Zhang KF, Wang YN, Wang XS. Nickel-Catalyzed Reductive Cross-Coupling of Aryl Halides with Monofluoroalkyl Halides for Late-Stage Monofluoroalkylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803228] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Jie Sheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; Center for Excellence in Molecular Synthesis of CAS; University of Science and Technology of China; 96 Jinzhai Road Hefei Anhui 230026 China
| | - Hui-Qi Ni
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; Center for Excellence in Molecular Synthesis of CAS; University of Science and Technology of China; 96 Jinzhai Road Hefei Anhui 230026 China
| | - Hao-Ran Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; Center for Excellence in Molecular Synthesis of CAS; University of Science and Technology of China; 96 Jinzhai Road Hefei Anhui 230026 China
| | - Kai-Fan Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; Center for Excellence in Molecular Synthesis of CAS; University of Science and Technology of China; 96 Jinzhai Road Hefei Anhui 230026 China
| | - Yi-Ning Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; Center for Excellence in Molecular Synthesis of CAS; University of Science and Technology of China; 96 Jinzhai Road Hefei Anhui 230026 China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry; Center for Excellence in Molecular Synthesis of CAS; University of Science and Technology of China; 96 Jinzhai Road Hefei Anhui 230026 China
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229
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Sheng J, Ni HQ, Zhang HR, Zhang KF, Wang YN, Wang XS. Nickel-Catalyzed Reductive Cross-Coupling of Aryl Halides with Monofluoroalkyl Halides for Late-Stage Monofluoroalkylation. Angew Chem Int Ed Engl 2018; 57:7634-7639. [PMID: 29682840 DOI: 10.1002/anie.201803228] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Indexed: 12/11/2022]
Abstract
A combinatorial nickel-catalyzed monofluoroalkylation of aryl halides with unactivated fluoroalkyl halides by reductive cross-coupling has been developed. This method demonstrated high efficiency, mild conditions, and excellent functional-group tolerance, thus enabling the late-stage monofluoroalkylation of diverse drugs. The key to success was the combination of diverse readily available bidentate and monodentate pyridine-type nitrogen ligands with nickel, which in situ generated a variety of readily tunable catalysts to promote fluoroalkylation with broad scope with respect to both coupling partners. This combinatorial catalysis strategy offers a solution for nickel-catalyzed reductive cross-coupling reactions and provides an efficient way to synthesize fluoroalkylated druglike molecules for drug discovery.
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Affiliation(s)
- Jie Sheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Hui-Qi Ni
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Hao-Ran Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Kai-Fan Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Yi-Ning Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, Center for Excellence in Molecular Synthesis of CAS, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui, 230026, China
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230
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Fan X, Rong J, Wu H, Zhou Q, Deng H, Tan JD, Xue C, Wu L, Tao H, Wu J. Eosin Y as a Direct Hydrogen‐Atom Transfer Photocatalyst for the Functionalization of C−H Bonds. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201803220] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xuan‐Zi Fan
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Jia‐Wei Rong
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Hao‐Lin Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 China
| | - Quan Zhou
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Hong‐Ping Deng
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Jin Da Tan
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Cheng‐Wen Xue
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 China
| | - Hai‐Rong Tao
- College of Chemistry Beijing Normal University Beijing 100875 China
| | - Jie Wu
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
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231
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Fan X, Rong J, Wu H, Zhou Q, Deng H, Tan JD, Xue C, Wu L, Tao H, Wu J. Eosin Y as a Direct Hydrogen‐Atom Transfer Photocatalyst for the Functionalization of C−H Bonds. Angew Chem Int Ed Engl 2018; 57:8514-8518. [DOI: 10.1002/anie.201803220] [Citation(s) in RCA: 216] [Impact Index Per Article: 36.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Revised: 04/13/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Xuan‐Zi Fan
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Jia‐Wei Rong
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Hao‐Lin Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 China
| | - Quan Zhou
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Hong‐Ping Deng
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Jin Da Tan
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Cheng‐Wen Xue
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
| | - Li‐Zhu Wu
- Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry The Chinese Academy of Sciences Beijing 100190 China
| | - Hai‐Rong Tao
- College of Chemistry Beijing Normal University Beijing 100875 China
| | - Jie Wu
- Department of Chemistry National University of Singapore 3 Science Drive 3 117543 Republic of Singapore
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232
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Bulky Diamine Ligand Promotes Cross-Coupling of Difluoroalkyl Bromides by Iron Catalysis. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201802713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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233
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An L, Xiao YL, Zhang S, Zhang X. Bulky Diamine Ligand Promotes Cross-Coupling of Difluoroalkyl Bromides by Iron Catalysis. Angew Chem Int Ed Engl 2018; 57:6921-6925. [PMID: 29667283 DOI: 10.1002/anie.201802713] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Indexed: 11/07/2022]
Abstract
Although iron-catalyzed cross-coupling of Grignard reagents with alkyl halides has been well established, the adoption of the reaction for fluoroalkylations has not been reported because traditional catalytic systems often lead to defluorination reactions. Described herein is the investigation of an iron-catalyzed cross-coupling between arylmagnesium bromides and difluoroalkyl bromides with modified N,N,N',N'-tetramethyl-ethane-1,2-diamine (TMEDA) as a ligand. The use of this bulky diamine, in which a butylene is substituted at one carbon atom of the ethylene backbone in TMEDA, enables the iron-catalyzed difluoroalkylation under mild reaction conditions with a wide range of difluoroalkyl bromides, including vulnerable bromodifluoromethane, thus providing a general and cost-efficient route for applications in medicinal chemistry.
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Affiliation(s)
- Lun An
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Yu-Lan Xiao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
| | - Shu Zhang
- School of Materials and Energy, University of Electronic Science and Technology of China, 2006 Xiyuan Avenue, West High-Tech Zone, Chengdu, Sichuan, 611731, China
| | - Xingang Zhang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai, 200032, China
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234
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Liu Z, Chen H, Lv Y, Tan X, Shen H, Yu HZ, Li C. Radical Carbofluorination of Unactivated Alkenes with Fluoride Ions. J Am Chem Soc 2018; 140:6169-6175. [DOI: 10.1021/jacs.8b03077] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zhonglin Liu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - He Chen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Ying Lv
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Xinqiang Tan
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Haigen Shen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Hai-Zhu Yu
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
- School of Materials and Chemical Engineering, Ningbo University of Technology, No. 201 Fenghua Road, Ningbo 315211, P. R. China
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235
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Sathyamoorthi S, Lai YH, Bain RM, Zare RN. Mechanistic Analysis of the C–H Amination Reaction of Menthol by CuBr2 and Selectfluor. J Org Chem 2018; 83:5681-5687. [DOI: 10.1021/acs.joc.8b00690] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Shyam Sathyamoorthi
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Yin-Hung Lai
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Ryan M. Bain
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Richard N. Zare
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
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236
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Pieber B, Shalom M, Antonietti M, Seeberger PH, Gilmore K. Kontinuierliche heterogene Photokatalyse in seriellen Mikro-Batch-Reaktoren. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712568] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Bartholomäus Pieber
- Abteilung für Biomolekulare Systeme; Max-Planck-Institut für Kolloid- und Grenzflächenforschung; Am Mühlenberg 1 14476 Potsdam Deutschland
| | - Menny Shalom
- Abteilung für Kolloidchemie; Max-Planck-Institut für Kolloid- und Grenzflächenforschung; Am Mühlenberg 1 14476 Potsdam Deutschland
- Derzeitige Adresse: Chemistry Department; Ben Gurion University of the Negev; Beersheba 009728 Israel
| | - Markus Antonietti
- Abteilung für Kolloidchemie; Max-Planck-Institut für Kolloid- und Grenzflächenforschung; Am Mühlenberg 1 14476 Potsdam Deutschland
| | - Peter H. Seeberger
- Abteilung für Biomolekulare Systeme; Max-Planck-Institut für Kolloid- und Grenzflächenforschung; Am Mühlenberg 1 14476 Potsdam Deutschland
| | - Kerry Gilmore
- Abteilung für Biomolekulare Systeme; Max-Planck-Institut für Kolloid- und Grenzflächenforschung; Am Mühlenberg 1 14476 Potsdam Deutschland
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237
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Pieber B, Shalom M, Antonietti M, Seeberger PH, Gilmore K. Continuous Heterogeneous Photocatalysis in Serial Micro-Batch Reactors. Angew Chem Int Ed Engl 2018; 57:9976-9979. [DOI: 10.1002/anie.201712568] [Citation(s) in RCA: 94] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2017] [Indexed: 12/31/2022]
Affiliation(s)
- Bartholomäus Pieber
- Department of Biomolecular Systems; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 14476 Potsdam Germany
| | - Menny Shalom
- Department of Colloid Chemistry; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 14476 Potsdam Germany
- Current address: Chemistry Department; Ben Gurion University of the Negev; Beersheba 009728 Israel
| | - Markus Antonietti
- Department of Colloid Chemistry; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 14476 Potsdam Germany
| | - Peter H. Seeberger
- Department of Biomolecular Systems; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 14476 Potsdam Germany
| | - Kerry Gilmore
- Department of Biomolecular Systems; Max Planck Institute of Colloids and Interfaces; Am Mühlenberg 1 14476 Potsdam Germany
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238
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Wu SW, Liu JL, Liu F. cis-Specific cyanofluorination of vinyl azides enabled by electron-donor-acceptor complexes: synthesis of α-azido-β-fluoronitriles. Chem Commun (Camb) 2018; 53:12321-12324. [PMID: 29095445 DOI: 10.1039/c7cc07165e] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Here we report a novel electron-donor-acceptor (EDA) complex-enabled three-component cyanofluorination of vinyl azides under metal-free conditions in a cis-specific manner. This reaction protocol is operationally simple without exclusion of either moisture or oxygen, allowing access to a wide range of highly-functionalized α-azido-β-fluoronitriles bearing quaternary carbons that are difficult to obtain by existing methods.
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Affiliation(s)
- Shu-Wei Wu
- Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases and Department of Medicinal Chemistry, College of Pharmaceutical Sciences, Soochow University, 199 Ren-Ai Road, Suzhou, Jiangsu 215123, People's Republic of China.
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239
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Rapid access to the core skeleton of the [3 + 2]-type dimeric pyrrole-imidazole alkaloids by triplet ketone-mediated C-H functionalization. Tetrahedron 2018; 74:769-772. [PMID: 29622843 DOI: 10.1016/j.tet.2017.12.027] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The ability of triplet ketones to abstract a hydrogen atom from hydrocarbons is reminiscent of that of the high-spin metal-oxo complexes in C-H oxidation enzymes. In practice, the reactivity of triplet ketones is easier to control and applicable to promoting a wider range of reactions. We demonstrate herein the synthetic utility of triplet ketone-mediated C-addition of methanol to cyclopentenone derivatives with an expedient synthesis of the core skeleton of the [3+2]-type dimeric pyrrole-imidazole alkaloids. Remarkably, this photochemical C-H functionalization reaction is highly regioselective and can tolerate a good range of functional groups.
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240
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Egami H, Masuda S, Kawato Y, Hamashima Y. Photofluorination of Aliphatic C–H Bonds Promoted by the Phthalimide Group. Org Lett 2018; 20:1367-1370. [DOI: 10.1021/acs.orglett.8b00133] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiromichi Egami
- School of Pharmaceutical
Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Shuya Masuda
- School of Pharmaceutical
Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yuji Kawato
- School of Pharmaceutical
Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Yoshitaka Hamashima
- School of Pharmaceutical
Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka 422-8526, Japan
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241
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Corrigan N, Shanmugam S, Xu J, Boyer C. Photocatalysis in organic and polymer synthesis. Chem Soc Rev 2018; 45:6165-6212. [PMID: 27819094 DOI: 10.1039/c6cs00185h] [Citation(s) in RCA: 464] [Impact Index Per Article: 77.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
This review, with over 600 references, summarizes the recent applications of photoredox catalysis for organic transformation and polymer synthesis. Photoredox catalysts are metallo- or organo-compounds capable of absorbing visible light, resulting in an excited state species. This excited state species can donate or accept an electron from other substrates to mediate redox reactions at ambient temperature with high atom efficiency. These catalysts have been successfully implemented for the discovery of novel organic reactions and synthesis of added-value chemicals with an excellent control of selectivity and stereo-regularity. More recently, such catalysts have been implemented by polymer chemists to post-modify polymers in high yields, as well as to effectively catalyze reversible deactivation radical polymerizations and living polymerizations. These catalysts create new approaches for advanced organic transformation and polymer synthesis. The objective of this review is to give an overview of this emerging field to organic and polymer chemists as well as materials scientists.
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Affiliation(s)
- Nathaniel Corrigan
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia. and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Sivaprakash Shanmugam
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia.
| | - Jiangtao Xu
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia. and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
| | - Cyrille Boyer
- Centre for Advanced Macromolecular Design (CAMD), School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia. and Australian Centre for NanoMedicine, School of Chemical Engineering, UNSW Australia, Sydney, NSW 2052, Australia
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242
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Bume DD, Harry SA, Pitts CR, Lectka T. Sensitized Aliphatic Fluorination Directed by Terpenoidal Enones: A “Visible Light” Approach. J Org Chem 2018; 83:1565-1575. [DOI: 10.1021/acs.joc.7b02807] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Desta Doro Bume
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Stefan Andrew Harry
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Cody Ross Pitts
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
| | - Thomas Lectka
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, United States
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243
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Lu C, Lu H, Wu J, Shen HC, Hu T, Gu Y, Shen Q. Palladium-Catalyzed Difluoromethylation of Aryl Chlorides and Triflates and Its Applications in the Preparation of Difluoromethylated Derivatives of Drug/Agrochemical Molecules. J Org Chem 2018; 83:1077-1083. [DOI: 10.1021/acs.joc.7b02989] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Changhui Lu
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Hao Lu
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Jiang Wu
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
| | - Hong C. Shen
- Roche Innovation Center Shanghai, Roche R&D Center (China) Ltd., 720 Cai Lun Road, Building 5, Pudong, Shanghai, 201203, China
| | - Taishan Hu
- Roche Innovation Center Shanghai, Roche R&D Center (China) Ltd., 720 Cai Lun Road, Building 5, Pudong, Shanghai, 201203, China
| | - Yucheng Gu
- Syngenta, Jealott’s Hill International Research Centre Bracknell, Berkshire RG42 6EY, U.K
| | - Qilong Shen
- Key
Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic
Chemistry, University of Chinese Academy of Sciences, 345 Lingling
Road, Shanghai 200032, China
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244
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Miao W, Zhao Y, Ni C, Gao B, Zhang W, Hu J. Iron-Catalyzed Difluoromethylation of Arylzincs with Difluoromethyl 2-Pyridyl Sulfone. J Am Chem Soc 2018; 140:880-883. [PMID: 29278333 DOI: 10.1021/jacs.7b11976] [Citation(s) in RCA: 135] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report the first iron-catalyzed difluoromethylation of arylzincs with difluoromethyl 2-pyridyl sulfone via selective C-S bond cleavage. This method employs the readily available, bench-stable fluoroalkyl sulfone reagent and inexpensive iron catalyst, allowing facile access to structurally diverse difluoromethylated arenes at low temperatures. The experiment employing a radical clock indicates the involvement of radical species in this iron-catalyzed difluoromethylation process.
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Affiliation(s)
- Wenjun Miao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai 200032, China
| | - Yanchuan Zhao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai 200032, China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai 200032, China
| | - Bing Gao
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai 200032, China
| | - Wei Zhang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai 200032, China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences , 345 Ling-Ling Road, Shanghai 200032, China
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245
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Tang SZ, Bian HL, Zhan ZS, Chen ME, Lv JW, Xie S, Zhang FM. p-Toluenesulfonic acid catalysed fluorination of α-branched ketones for the construction of fluorinated quaternary carbon centres. Chem Commun (Camb) 2018; 54:12377-12380. [DOI: 10.1039/c8cc06643d] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
A catalytic and concise fluorination of α-branched ketones for the construction of the challenging quaternary C–F bond could be achieved.
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Affiliation(s)
- Shi-Zhong Tang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Hong-Li Bian
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Zong-Song Zhan
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Meng-En Chen
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Jian-Wei Lv
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Shaolei Xie
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
| | - Fu-Min Zhang
- State Key Laboratory of Applied Organic Chemistry and Department of Chemistry
- Lanzhou University
- Lanzhou
- P. R. China
- Key Laboratory of Drug-Targeting of Education Ministry and Department of Medicinal Chemistry
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246
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247
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Ma Z, Chen C. Natural products as inspiration for the development of new synthetic methods. J CHIN CHEM SOC-TAIP 2018; 65:43-59. [PMID: 29430058 PMCID: PMC5800783 DOI: 10.1002/jccs.201700134] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Natural products have played an important role in shaping modern synthetic organic chemistry. In particular, their complex molecular skeletons have stimulated the development of many new synthetic methods. We highlight in this article some recent examples of synthetic design inspired by the biosynthesis of natural products.
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Affiliation(s)
- Zhiqiang Ma
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
- School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, P. R. China
| | - Chuo Chen
- Department of Biochemistry, The University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390-9038, USA
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248
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C–H Activation via Radical Processes Using Photo-Excited Ketones. TOPICS IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1007/7081_2017_15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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249
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Sheng J, Ni HQ, Bian KJ, Li Y, Wang YN, Wang XS. Nickel-catalyzed direct difluoromethylation of aryl boronic acids with BrCF2H. Org Chem Front 2018. [DOI: 10.1039/c7qo00934h] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nickel-catalyzed direct difluoromethylation of aryl boronic acids has been developed with the industrial raw material BrCF2H.
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Affiliation(s)
- Jie Sheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Hui-Qi Ni
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Kang-Jie Bian
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Yi-Ning Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
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250
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Wang H, Jui NT. Catalytic Defluoroalkylation of Trifluoromethylaromatics with Unactivated Alkenes. J Am Chem Soc 2017; 140:163-166. [PMID: 29256607 DOI: 10.1021/jacs.7b12590] [Citation(s) in RCA: 163] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
We describe a new catalytic approach to selective functionalization of the strong C-F bonds in trifluoromethylaromatic (Ar-CF3) systems. In this approach, single electron reduction of Ar-CF3 substrates (using a photoredox catalyst) results in difluorobenzylic radical formation through a C-F cleavage mechanism. These radicals undergo efficient intermolecular coupling with simple alkenes in a defluoroalkylation process where radical termination is accomplished by a polarity reversal catalyst. This mild catalytic protocol engages a wide range of substrates to give medicinally relevant fluorinated substructures with complete regiocontrol.
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Affiliation(s)
- Hengbin Wang
- Department of Chemistry and Winship Cancer Institute, Emory University , Atlanta, Georgia 30322, United States
| | - Nathan T Jui
- Department of Chemistry and Winship Cancer Institute, Emory University , Atlanta, Georgia 30322, United States
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