1
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Galeotti M, Lee W, Sisti S, Casciotti M, Salamone M, Houk KN, Bietti M. Radical and Cationic Pathways in C( sp3)-H Bond Oxygenation by Dioxiranes of Bicyclic and Spirocyclic Hydrocarbons Bearing Cyclopropane Moieties. J Am Chem Soc 2023; 145:24021-24034. [PMID: 37874906 PMCID: PMC10636757 DOI: 10.1021/jacs.3c07163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Revised: 10/03/2023] [Accepted: 10/04/2023] [Indexed: 10/26/2023]
Abstract
A product and DFT computational study on the reactions of 3-ethyl-3-(trifluoromethyl)dioxirane (ETFDO) with bicyclic and spirocyclic hydrocarbons bearing cyclopropyl groups was carried out. With bicyclo[n.1.0]alkanes (n = 3-6), diastereoselective formation of the alcohol product derived from C2-H bond hydroxylation was observed, accompanied by smaller amounts of products derived from oxygenation at other sites. With 1-methylbicyclo[4.1.0]heptane, rearranged products were also observed in addition to the unrearranged products deriving from oxygenation at the most activated C2-H and C5-H bonds. With spiro[2.5]octane and 6-tert-butylspiro[2.5]octane, reaction with ETFDO occurred predominantly or exclusively at the axial C4-H to give unrearranged oxygenation products, accompanied by smaller amounts of rearranged bicyclo[4.2.0]octan-1-ols. The good to outstanding site-selectivities and diastereoselectivities are paralleled by the calculated activation free energies for the corresponding reaction pathways. Computations show that the σ* orbitals of the bicyclo[n.1.0]alkane cis or trans C2-H bonds and spiro[2.5]octanes axial C4-H bond hyperconjugatively interact with the Walsh orbitals of the cyclopropane ring, activating these bonds toward HAT to ETFDO. The detection of rearranged oxygenation products in the oxidation of 1-methylbicyclo[4.1.0]heptane, spiro[2.5]octane, and 6-tert-butylspiro[2.5]octane provides unambiguous evidence for the involvement of cationic intermediates in these reactions, representing the first examples on the operation of ET pathways in dioxirane-mediated C(sp3)-H bond oxygenations. Computations support these findings, showing that formation of cationic intermediates is associated with specific stabilizing hyperconjugative interactions between the incipient carbon radical and the cyclopropane C-C bonding orbitals that trigger ET to the incipient dioxirane derived 1,1,1-trifluoro-2-hydroxy-2-butoxyl radical.
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Affiliation(s)
- Marco Galeotti
- Dipartimento
di Scienze e Tecnologie Chimiche, Università
“Tor Vergata”, Via della Ricerca Scientifica 1, I-00133, Rome, Italy
- QBIS
Research Group, Institut de Química Computacional i Catàlisi
(IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Woojin Lee
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - Sergio Sisti
- Dipartimento
di Scienze e Tecnologie Chimiche, Università
“Tor Vergata”, Via della Ricerca Scientifica 1, I-00133, Rome, Italy
| | - Martina Casciotti
- Dipartimento
di Scienze e Tecnologie Chimiche, Università
“Tor Vergata”, Via della Ricerca Scientifica 1, I-00133, Rome, Italy
| | - Michela Salamone
- Dipartimento
di Scienze e Tecnologie Chimiche, Università
“Tor Vergata”, Via della Ricerca Scientifica 1, I-00133, Rome, Italy
| | - K. N. Houk
- Department
of Chemistry and Biochemistry, University
of California, Los Angeles, California 90095, United States
| | - Massimo Bietti
- Dipartimento
di Scienze e Tecnologie Chimiche, Università
“Tor Vergata”, Via della Ricerca Scientifica 1, I-00133, Rome, Italy
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2
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Koser L, Bach T. Total Synthesis of (-)-5-Deoxyenterocin and Attempted Late-Stage Functionalization Reactions. Chemistry 2023; 29:e202301996. [PMID: 37452638 DOI: 10.1002/chem.202301996] [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: 06/23/2023] [Revised: 07/14/2023] [Accepted: 07/14/2023] [Indexed: 07/18/2023]
Abstract
The first total synthesis of (-)-5-deoxyenterocin has been accomplished starting from pentane-1,3,5-triol (16 steps in the longest linear sequence, 0.2 % overall yield). (-)-Menthone served as the source of chirality to distinguish the enantiotopic hydroxymethyl groups of the substrate. Key steps of the synthesis include two aldol reactions to either end of the C5 -skeleton, a diastereoselective hydroxylation reaction and a biomimetic twofold intramolecular aldol reaction as the final step. Although this step suffered from geometrical constraints and was low yielding (10 %), enough synthetic material could be secured to substantiate the relative and absolute configuration of the natural product. Additional experiments were directed toward a C-H functionalization at carbon atom C5. Despite the fact that several protocols could be successfully applied to (3aR)-(+)-sclareolide as model substrate, (-)-5-deoxyenterocin withstood any selective functionalization.
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Affiliation(s)
- Lilla Koser
- Department Chemie and Catalysis Research Center (CRC), School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
| | - Thorsten Bach
- Department Chemie and Catalysis Research Center (CRC), School of Natural Sciences, Technische Universität München, Lichtenbergstraße 4, 85747, Garching, Germany
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3
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Abstract
Organosulfur functionalities are ubiquitous in nature, pharmaceuticals, agrochemicals, materials and flavourants. Historically, these moieties were introduced almost exclusively using ionic chemistry; however, radical-based methods for the installation of sulfur-based functional groups have recently come to the fore. These radical methods have enabled their late-stage introduction into complex molecules, avoiding the need to preserve labile organosulfur moieties through multistep synthetic sequences. Here, we discuss homolytic C-S bond-forming processes, with a particular emphasis on radical substitution approaches to sulfide, disulfide and sulfinyl products, and the use of sulfur dioxide and its surrogates to build sulfonyl products. We also highlight the mechanistic considerations that we hope will guide further development of radical-based strategies compatible with the various organosulfur moieties that feature in modern chemistry.
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Affiliation(s)
- Zijun Wu
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Derek A Pratt
- Department of Chemistry and Biomolecular Sciences, University of Ottawa, Ottawa, Ontario, Canada.
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4
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Castellino NJ, Montgomery AP, Danon JJ, Kassiou M. Late-stage Functionalization for Improving Drug-like Molecular Properties. Chem Rev 2023. [PMID: 37285604 DOI: 10.1021/acs.chemrev.2c00797] [Citation(s) in RCA: 31] [Impact Index Per Article: 31.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The development of late-stage functionalization (LSF) methodologies, particularly C-H functionalization, has revolutionized the field of organic synthesis. Over the past decade, medicinal chemists have begun to implement LSF strategies into their drug discovery programs, allowing for the drug discovery process to become more efficient. Most reported applications of late-stage C-H functionalization of drugs and drug-like molecules have been to rapidly diversify screening libraries to explore structure-activity relationships. However, there has been a growing trend toward the use of LSF methodologies as an efficient tool for improving drug-like molecular properties of promising drug candidates. In this review, we have comprehensively reviewed recent progress in this emerging area. Particular emphasis is placed on case studies where multiple LSF techniques were implemented to generate a library of novel analogues with improved drug-like properties. We have critically analyzed the current scope of LSF strategies to improve drug-like properties and commented on how we believe LSF can transform drug discovery in the future. Overall, we aim to provide a comprehensive survey of LSF techniques as tools for efficiently improving drug-like molecular properties, anticipating its continued uptake in drug discovery programs.
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Affiliation(s)
| | | | - Jonathan J Danon
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Michael Kassiou
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
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5
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Kalshetti RG, Rajput R, Motiwala Z, Srinivasa Reddy D, Kulkarni KA, Ramana CV. Postmodification of voxelotor (GBT 440) via [Rh]-catalyzed cross dehydrogenative coupling with olefins. Bioorg Med Chem Lett 2022; 77:129022. [DOI: 10.1016/j.bmcl.2022.129022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2022] [Revised: 09/24/2022] [Accepted: 10/06/2022] [Indexed: 11/16/2022]
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6
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Mestre J, Bernús M, Castillón S, Boutureira O. Electrophilic Reagents for the Direct Incorporation of Uncommon SCF 2CF 2H and SCF 2CF 3 Motifs. J Org Chem 2022; 87:10791-10806. [PMID: 35944166 PMCID: PMC9400389 DOI: 10.1021/acs.joc.2c01038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Indexed: 12/05/2022]
Abstract
The introduction of fluoroalkylthioether groups has attracted the attention of the drug-discovery community given the special physicochemical and pharmacokinetic features they confer to bioactive compounds, yet these are often limited to standard SCF3 and SCF2H moieties. Herein, two saccharin-based electrophilic reagents have been disclosed for the incorporation of uncommon SCF2CF2H and SCF2CF3 motifs. Their reactivity performance, multigram-scale preparation, and divergent derivatization have been thoroughly investigated with a variety of nucleophiles, including natural products and pharmaceuticals.
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Affiliation(s)
| | | | - Sergio Castillón
- Departament de Química
Analítica i Química Orgànica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo 1, 43007 Tarragona, Spain
| | - Omar Boutureira
- Departament de Química
Analítica i Química Orgànica, Universitat Rovira i Virgili, C/ Marcel·lí Domingo 1, 43007 Tarragona, Spain
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7
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Chen X, Pei C, Liu B, Li J, Zou D, Wu Y, Wu Y. Copper-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes to construct SCF 3-containing dioxodibenzothiazepines. Chem Commun (Camb) 2022; 58:8674-8677. [PMID: 35822922 DOI: 10.1039/d2cc02171d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mild and efficient Cu-assisted trifluoromethylthiolation/radical cascade cyclization of alkynes with readily available and stable AgSCF3 as the trifluoromethylthiolating reagent has been disclosed. This transformation provides an opportunity to construct a series of potential medicinally valuable trifluoromethylthio-substituted dioxodibenzothiazepines with wide functional group compatibility. This protocol opens up a new avenue for the construction of useful trifluoromethylthiolated seven-membered N-heterocycles.
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Affiliation(s)
- Xiaoyu Chen
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Congcong Pei
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Bo Liu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Jingya Li
- Tetranov Biopharm, LLC., Zhengzhou, 450052, People's Republic of China
| | - Dapeng Zou
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China.
| | - Yusheng Wu
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, Henan, 450001, People's Republic of China. .,Tetranov International, Inc., 100 Jersey Avenue, Suite A340, New Brunswick, NJ, 08901, USA.
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8
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Galeotti M, Vicens L, Salamone M, Costas M, Bietti M. Resolving Oxygenation Pathways in Manganese-Catalyzed C(sp 3)-H Functionalization via Radical and Cationic Intermediates. J Am Chem Soc 2022; 144:7391-7401. [PMID: 35417154 PMCID: PMC9052745 DOI: 10.1021/jacs.2c01466] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
![]()
The C(sp3)–H bond oxygenation of the cyclopropane-containing
mechanistic probes 6-tert-butylspiro[2.5]octane and
spiro[2.5]octane with hydrogen peroxide catalyzed by manganese complexes
bearing aminopyridine tetradentate ligands has been studied. Mixtures
of unrearranged and rearranged oxygenation products (alcohols, ketones,
and esters) are obtained, suggesting the involvement of cationic intermediates
and the contribution of different pathways following the initial hydrogen
atom transfer-based C–H bond cleavage step. Despite such a
complex mechanistic scenario, a judicious choice of the catalyst structure
and reaction conditions (solvent, temperature, and carboxylic acid)
could be employed to resolve these oxygenation pathways, leading,
with the former substrate, to conditions where a single unrearranged
or rearranged product is obtained in good isolated yield. Taken together,
the work demonstrates an unprecedented ability to precisely direct
the chemoselectivity of the C–H oxidation reaction, discriminating
among multiple pathways. In addition, these results conclusively demonstrate
that stereospecific C(sp3)–H oxidation can take
place via a cationic intermediate and that this path can become exclusive
in governing product formation, expanding the available toolbox of
aliphatic C–H bond oxygenations. The implications of these
findings are discussed in the framework of the development of synthetically
useful C–H functionalization procedures and the associated
mechanistic features.
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Affiliation(s)
- Marco Galeotti
- Dipartimento di Scienze e Tecnologie Chimiche, Università"Tor Vergata", Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
| | - Laia Vicens
- QBIS Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Michela Salamone
- Dipartimento di Scienze e Tecnologie Chimiche, Università"Tor Vergata", Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
| | - Miquel Costas
- QBIS Research Group, Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Girona E-17071, Catalonia, Spain
| | - Massimo Bietti
- Dipartimento di Scienze e Tecnologie Chimiche, Università"Tor Vergata", Via della Ricerca Scientifica, 1, I-00133 Rome, Italy
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9
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Xin J, Chen T, Tang P. Direct Trifluoromethylthiolation of Aziridines: Cation-Controlled Diverse Synthesis of Trifluoromethylthiolated Isothiocyanates and Amines. Org Lett 2022; 24:2035-2039. [PMID: 35261244 DOI: 10.1021/acs.orglett.2c00558] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The direct trifluoromethylthiolation of aziridines with AgSCF3 and iodides is reported. The β-trifluoromethylthiolated isothiocyanates and amines were selectively obtained by the changed cation of iodide. This strategy is tolerant to a wide range of functional groups with good yields and regioselectivities. In addition, the isothiocyanates can be used for further synthetic manipulation, which offered a convenient approach for SCF3-containing compounds.
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Affiliation(s)
- Jingrui Xin
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Tengying Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China
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10
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Galeotti M, Salamone M, Bietti M. Electronic control over site-selectivity in hydrogen atom transfer (HAT) based C(sp 3)-H functionalization promoted by electrophilic reagents. Chem Soc Rev 2022; 51:2171-2223. [PMID: 35229835 DOI: 10.1039/d1cs00556a] [Citation(s) in RCA: 42] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The direct functionalization of C(sp3)-H bonds represents one of the most investigated approaches to develop new synthetic methodology. Among the available strategies for intermolecular C-H bond functionalization, increasing attention has been devoted to hydrogen atom transfer (HAT) based procedures promoted by radical or radical-like reagents, that offer the opportunity to introduce a large variety of atoms and groups in place of hydrogen under mild conditions. Because of the large number of aliphatic C-H bonds displayed by organic molecules, in these processes control over site-selectivity represents a crucial issue, and the associated factors have been discussed. In this review article, attention will be devoted to the role of electronic effects on C(sp3)-H bond functionalization site-selectivity. Through an analysis of the recent literature, a detailed description of the HAT reagents employed in these processes, the associated mechanistic features and the selectivity patterns observed in the functionalization of substrates of increasing structural complexity will be provided.
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Affiliation(s)
- Marco Galeotti
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
| | - Michela Salamone
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
| | - Massimo Bietti
- Dipartimento di Scienze e Tecnologie Chimiche, Università "Tor Vergata", Via della Ricerca Scientifica, 1 I-00133 Rome, Italy.
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11
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Xiao Y, Jia Y, Huang J, Li X, Zhou Z, Zhang J, Jiang M, Zhou X, Jiang Z, Yang Z. Synthesis of SCF
3
‐Substituted Sulfonium Ylides from Sulfonium Salts or α‐Bromoacetic Esters. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202101271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Yushan Xiao
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Yimin Jia
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Jinfeng Huang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Xiangyu Li
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Zhiwen Zhou
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Jing Zhang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Mou Jiang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovative Academy of Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 People's Republic of China
| | - Xin Zhou
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in Wuhan Wuhan Institute of Physics and Mathematics Innovative Academy of Precision Measurement Science and Technology Chinese Academy of Sciences Wuhan 430071 People's Republic of China
| | - Zhong‐Xing Jiang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
| | - Zhigang Yang
- Hubei Province Engineering and Technology Research Center for Fluorinated Pharmaceuticals School of Pharmaceutical Sciences Wuhan University Wuhan 430071 People's Republic of China
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12
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Wang L, Xie L, Fang Z, Zhang Q, Li D. Tandem trifluoromethylthiolation and cyclization of N-aryl-3-butenamides with AgSCF 3: divergent access to CF 3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones. Org Chem Front 2022. [DOI: 10.1039/d2qo00207h] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A AgSCF3-mediated tandem trifluoromethylthiolaton and cyclization of N-aryl-3-butenamides was developed. It showed divergent reactivities and enabled the selective syntheses of CF3S-substituted 3,4-dihydroquinolin-2-ones and azaspiro[4,5]dienones. The selectivity was achieved through different...
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13
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Shen LY, Sun Y, Wang YQ, Li B, Yang WC, Dai P. K2S2O8-promoted radical trifluoromethylthiolation/spirocyclization for the synthesis of SCF3‑featured spiro[5,5]trienones. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132649] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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14
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Xiong YS, Zhang C, Rujian Y, Hai-Yan H, Pei W, Fu WY, Cheng JX. Silver-Mediated Radical Oxytrifluoromethylation of Unstaurated Carboxylic Acids for the Synthesis of γ-Trifluoromethylthio Lactones. Org Biomol Chem 2022; 20:2109-2114. [DOI: 10.1039/d2ob00018k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient silver-mediated oxidative trifluoromethylthiolation of unsaturated carboxylic acids to constructed trifluoromethylthiole-containing lactones has been disclosed. This protocol without added other metal-catalyst, preliminary mechanism investigations suggested that a free-radical pathway...
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15
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Rampon D, Seckler D, da Luz EQ, Paixão DB, Larroza AME, Schneider PH, Alves D. Transition metal catalysed direct sulfanylation of unreactive C-H bonds: an overview of the last two decades. Org Biomol Chem 2022; 20:6072-6177. [DOI: 10.1039/d2ob00986b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal catalysed direct sulfanylations of unreactive C-H bonds have become a unique and straightforward synthetic strategy in late-stage C-S bond formation of relevant complex molecules. Such transformations have represented...
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16
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Liu B, Wang Z, Sun K, Tang S, Wang X. Silver-Mediated Radical Trifluoromethylthiolation Cyclization: Synthesis of CF 3S-Containing Benzimidazole[2,1- a]isoquinolines. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202203053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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17
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Rajamanickam S, Saraswat M, Venkataramani S, Patel BK. Intermolecular CDC amination of remote and proximal unactivated C sp3 -H bonds through intrinsic substrate reactivity - expanding towards a traceless directing group. Chem Sci 2021; 12:15318-15328. [PMID: 34976352 PMCID: PMC8635183 DOI: 10.1039/d1sc04365j] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 10/26/2021] [Indexed: 12/12/2022] Open
Abstract
An intermolecular radical based distal selectivity in appended alkyl chains has been developed. The selectivity is maximum when the distal carbon is γ to the appended group and decreases by moving from γ → δ → ε positions. In –COO– linked alkyl chains, the same distal γ-selectivity is observed irrespective of its origin, either from the alkyl carboxy acid or alkyl alcohol. The appended groups include esters, N–H protected amines, phthaloyl, sulfone, sulfinimide, nitrile, phosphite, phosphate and borate esters. In borate esters, boron serves as a traceless directing group, which is hitherto unprecedented for any remote Csp3–H functionalization. The selectivity order follows the trend: 3° benzylic > 2° benzylic > 3° tertiary > α to keto > distal methylene (γ > δ > ε). Computations predicted the radical stability (thermodynamic factors) and the kinetic barriers as the factors responsible for such trends. Remarkably, this strategy eludes any designer catalysts, and the selectivity is due to the intrinsic substrate reactivity. An intermolecular amination at the distal methylene carbon has been realized in an appended alkyl chain with electron withdrawing groups. Traceless remote Csp3–H functionalization has been accomplished using borate esters.![]()
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Affiliation(s)
- Suresh Rajamanickam
- Department of Chemistry, Indian Institute of Technology Guwahati North Guwahati Address Assam-781039 India
| | - Mayank Saraswat
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector 81, Knowledge City, Manauli SAS Nagar 140306 India
| | - Sugumar Venkataramani
- Department of Chemical Sciences, Indian Institute of Science Education and Research (IISER) Mohali Sector 81, Knowledge City, Manauli SAS Nagar 140306 India
| | - Bhisma K Patel
- Department of Chemistry, Indian Institute of Technology Guwahati North Guwahati Address Assam-781039 India
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18
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Zhang H, Wang Q, Wang Y, Yuan Z, Gao F, Britton R. Selective Trifluoromethylthiolation of Unactivated C(sp
3
)−H Bonds Enabled by Excited Ketones. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100471] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Han Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life Sciences Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Qing Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life Sciences Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Yanan Wang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life Sciences Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Zheliang Yuan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Life Sciences Zhejiang Normal University 688 Yingbin Road Jinhua 321004 P. R. China
| | - Feng Gao
- Key Laboratory for Experimental Teratology of the Ministry of Education and Biomedical isotope research center School of basic medical sciences Cheeloo College of Medicine Shandong University Jinan Shandong 250012 P. R. China
| | - Robert Britton
- Department of Chemistry Simon Fraser University Burnaby British Columbia V5 A 1S6 Canada
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19
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Schirmer TE, Rolka AB, Karl TA, Holzhausen F, König B. Photocatalytic C-H Trifluoromethylthiolation by the Decatungstate Anion. Org Lett 2021; 23:5729-5733. [PMID: 34260256 DOI: 10.1021/acs.orglett.1c01870] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A broadly applicable method for the trifluoromethylthiolation of methylene C(sp3)-H, methine C(sp3)-H, α-oxygen C(sp3)-H, and formyl C(sp2)-H bonds is presented using the decatungstate anion as the sole catalyst. By adjusting the substrate ratio and reaction concentration, this method was applied to 40 examples in good regioselectivities, including the derivatization of natural products. Furthermore, SCF3-drug analogues were synthesized by subsequent functionalization of the SCF3 products, highlighting the importance of this photocatalyzed C-H functionalization.
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Affiliation(s)
- Tobias E Schirmer
- University of Regensburg, Institute of Organic Chemistry, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Alessa B Rolka
- University of Regensburg, Institute of Organic Chemistry, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Tobias A Karl
- University of Regensburg, Institute of Organic Chemistry, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Ferdinand Holzhausen
- University of Regensburg, Institute of Organic Chemistry, Universitätsstraße 31, 93053 Regensburg, Germany
| | - Burkhard König
- University of Regensburg, Institute of Organic Chemistry, Universitätsstraße 31, 93053 Regensburg, Germany
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20
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Nobile E, Castanheiro T, Besset T. Radical-Promoted Distal C-H Functionalization of C(sp 3 ) Centers with Fluorinated Moieties. Angew Chem Int Ed Engl 2021; 60:12170-12191. [PMID: 32897632 DOI: 10.1002/anie.202009995] [Citation(s) in RCA: 62] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 08/28/2020] [Indexed: 12/12/2022]
Abstract
Due to their unique properties, fluorinated scaffolds are pivotal compounds in pharmaceuticals, agrochemicals, and materials science. Over the last years, the development of versatile strategies for the selective synthesis of fluorinated molecules by direct C-H bond functionalization has attracted a lot of attention. In particular, the design of novel transformations based on a radical process was a bottleneck for distal C-H functionalization reactions, offering synthetic solutions for the selective introduction of fluorinated groups. This Minireview highlights the major contributions in this blossoming field. The development of new methodologies for the remote functionalization of aliphatic derivatives with various fluorinated groups based on a 1,5-hydrogen atom transfer process and a β-fragmentation reaction will be showcased and discussed.
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Affiliation(s)
- Enzo Nobile
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Thomas Castanheiro
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), 76000, Rouen, France
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21
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Nobile E, Castanheiro T, Besset T. Radical‐Promoted Distal C−H Functionalization of C(sp
3
) Centers with Fluorinated Moieties. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202009995] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Enzo Nobile
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
| | - Thomas Castanheiro
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
| | - Tatiana Besset
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
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22
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Radhika S, Abdulla CMA, Aneeja T, Anilkumar G. Silver-catalysed C–H bond activation: a recent review. NEW J CHEM 2021. [DOI: 10.1039/d1nj02156g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Transition metal catalysed C–H activations are efficient, simple, mild, cost-effective and stereoselective, and many of them are environmentally sustainable transformations.
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Affiliation(s)
- Sankaran Radhika
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - C. M. Afsina Abdulla
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Thaipparambil Aneeja
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
| | - Gopinathan Anilkumar
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
- Advanced Molecular Materials Research Centre (AMMRC), Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P.O., Kottayam, Kerala, 686560, India
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23
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Panferova LI, Zubkov MO, Kokorekin VA, Levin VV, Dilman AD. Using the Thiyl Radical for Aliphatic Hydrogen-Atom Transfer: Thiolation of Unactivated C-H Bonds. Angew Chem Int Ed Engl 2020; 60:2849-2854. [PMID: 33146419 DOI: 10.1002/anie.202011400] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/10/2020] [Indexed: 12/18/2022]
Abstract
A metal- and catalyst-free thiyl-radical-mediated activation of alkanes is described. Tetrafluoropyridinyl disulfide is used to perform thiolation of the C-H bonds under irradiation with 400 nm light-emitting diodes. The key C-H activation step is believed to proceed via hydrogen-atom abstraction effected by the fluorinated thiyl radical. Secondary, tertiary, and heteroatom-substituted C-H bonds can be involved in the thiolation reaction. The resulting sulfides have wide potential as photoredox-active radical precursors in reactions with alkenes and heteroarenes.
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Affiliation(s)
- Liubov I Panferova
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Mikhail O Zubkov
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Vladimir A Kokorekin
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Vitalij V Levin
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russian Federation
| | - Alexander D Dilman
- N. D. Zelinsky Institute of Organic Chemistry, Leninsky prosp. 47, 119991, Moscow, Russian Federation
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24
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Panferova LI, Zubkov MO, Kokorekin VA, Levin VV, Dilman AD. Using the Thiyl Radical for Aliphatic Hydrogen‐Atom Transfer: Thiolation of Unactivated C−H Bonds. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011400] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Liubov I. Panferova
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Mikhail O. Zubkov
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Vladimir A. Kokorekin
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Vitalij V. Levin
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
| | - Alexander D. Dilman
- N. D. Zelinsky Institute of Organic Chemistry Leninsky prosp. 47 119991 Moscow Russian Federation
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25
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Barday M, Blieck R, Ruyet L, Besset T. Remote trifluoromethylthiolation of alcohols under visible light. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131153] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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26
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Zhang F, Wang X, Zhou Y, Shi H, Feng Z, Ma J, Marek I. Remote Fluorination and Fluoroalkyl(thiol)ation Reactions. Chemistry 2020; 26:15378-15396. [DOI: 10.1002/chem.202003416] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Indexed: 12/22/2022]
Affiliation(s)
- Fa‐Guang Zhang
- Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Sciences Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Center of Chemical Science & Engineering Tianjin University Tianjin 300072 China
| | - Xue‐Qi Wang
- Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Sciences Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Center of Chemical Science & Engineering Tianjin University Tianjin 300072 China
| | - Yin Zhou
- Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Sciences Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Center of Chemical Science & Engineering Tianjin University Tianjin 300072 China
| | - Hong‐Song Shi
- Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Sciences Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Center of Chemical Science & Engineering Tianjin University Tianjin 300072 China
| | - Zhe Feng
- Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Sciences Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Center of Chemical Science & Engineering Tianjin University Tianjin 300072 China
| | - Jun‐An Ma
- Department of Chemistry Tianjin Key Laboratory of Molecular Optoelectronic Sciences Frontiers Science Center for Synthetic Biology (Ministry of Education), and Tianjin Collaborative Innovation Center of Chemical Science & Engineering Tianjin University Tianjin 300072 China
| | - Ilan Marek
- Schulich Faculty of Chemistry Technion-Israel Institute of Technology Haifa 3200009 Israel
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27
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Luo Z, Yang X, Tsui GC. Perfluoroalkylation of Thiosulfonates: Synthesis of Perfluoroalkyl Sulfides. Org Lett 2020; 22:6155-6159. [PMID: 32648444 DOI: 10.1021/acs.orglett.0c02235] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A practical synthesis of perfluoroalkyl sulfides is described. The method employs stable and readily accessible thiosulfonates as new electrophiles with commercial nucleophilic perfluoroalkylating reagents. The mild reaction conditions allow access to a wide variety of both aryl- and alkyl-substituted perfluoroalkyl sulfides amenable to pharmaceutical development. Furthermore, the reaction operation is straightforward, odorless, does not produce toxic wastes, and, therefore should appeal to practitioners in industrial-scale productions.
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Affiliation(s)
- Ziwei Luo
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Xinkan Yang
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
| | - Gavin Chit Tsui
- Department of Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong SAR
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28
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Yan J, Jiang M, Song L, Liu J. Oxytrifluoromethylthiolation of 2,3‐Allenoates with Trifluoromethanesulfinyl Chloride: A Synthetic Approach to Trifluoromethylthiolated 4‐Oxo‐2(E)‐alkenoates and Furans. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000304] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jun Yan
- Department of ChemistrySchool of ScienceShanghai University 99 Shangda Road Shanghai 200436 People's Republic of China
| | - Min Jiang
- Key Laboratory of Organofluorine ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences 345 Lingling Road Shanghai 200032 People's Republic of China
| | - Li‐Ping Song
- Department of ChemistrySchool of ScienceShanghai University 99 Shangda Road Shanghai 200436 People's Republic of China
| | - Jin‐Tao Liu
- Key Laboratory of Organofluorine ChemistryShanghai Institute of Organic ChemistryChinese Academy of Sciences 345 Lingling Road Shanghai 200032 People's Republic of China
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29
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Zheng C, Huang S, Liu Y, Jiang C, Zhang W, Fang G, Hong J. Geometrically Selective Denitrative Trifluoromethylthiolation of β-Nitrostyrenes with AgSCF 3 for ( E)-Vinyl Trifluoromethyl Thioethers. Org Lett 2020; 22:4868-4872. [PMID: 32479731 DOI: 10.1021/acs.orglett.0c01714] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An efficient copper(II)-promoted denitrative trifluoromethylthiolation under mild reaction conditions has been developed for vinyl trifluoromethyl thioethers to construct Cvinyl-SCF3 bonds with stable AgSCF3 as a source of the trifluoromethylthio. This reaction system tolerates a broad range of functional groups to commendably achieve a high product yield and excellent stereoselectivity of E/Z.
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Affiliation(s)
- Changge Zheng
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China.,School of Chemical Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang Uygur Autonomous Region 830052, P. R. China
| | - Shuai Huang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Yang Liu
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Chao Jiang
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
| | - Wei Zhang
- School of Chemical Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang Uygur Autonomous Region 830052, P. R. China
| | - Ge Fang
- School of Chemical Engineering, Xinjiang Agricultural University, Urumqi, Xinjiang Uygur Autonomous Region 830052, P. R. China
| | - Jianquan Hong
- Key Laboratory of Synthetic and Biological Colloids, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, Jiangsu 214122, P. R. China
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30
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Liu YL, Qing FL, Xu XH. 1,2-Bis(trifluoromethylthiolation) of Aromatic Epoxides with AgSCF 3. European J Org Chem 2020. [DOI: 10.1002/ejoc.201901836] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yin-Li Liu
- Key Laboratory of Organofluorine Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Science, Chinese Academy of Sciences; 345 Lingling Lu 200032 Shanghai China
| | - Feng-Ling Qing
- Key Laboratory of Organofluorine Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Science, Chinese Academy of Sciences; 345 Lingling Lu 200032 Shanghai China
- Key Laboratory of Science and Technology of Eco-Textiles; Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology; Donghua University; 2999 North Renmin Lu 201620 Shanghai China
| | - Xiu-Hua Xu
- Key Laboratory of Organofluorine Chemistry; Center for Excellence in Molecular Synthesis; Shanghai Institute of Organic Chemistry; University of Chinese Academy of Science, Chinese Academy of Sciences; 345 Lingling Lu 200032 Shanghai China
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31
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He G, Jiang YH, Xiao X, Lin JH, Zheng X, Du RB, Cao YC, Xiao JC. Difluorocarbene-based trifluoromethylthiolation of terminal alkynes. J Fluor Chem 2020. [DOI: 10.1016/j.jfluchem.2019.109437] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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32
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Eitzinger A, Brière JF, Cahard D, Waser M. Enantioselective catalytic synthesis of α-aryl-α-SCF 3-β 2,2-amino acids. Org Biomol Chem 2020; 18:405-408. [PMID: 31915785 PMCID: PMC6989214 DOI: 10.1039/c9ob02666e] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We herein report a novel entry towards chiral α-SCF3-β2,2-amino acids by carrying out the ammonium salt-catalyzed α-trifluoromethylthiolation of isoxazolidin-5-ones. This approach allowed for high enantioselectivities and high yields and the obtained heterocycles proved to be versatile platforms to access other targets of potential interest.
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Affiliation(s)
- Andreas Eitzinger
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria
| | | | - Dominique Cahard
- CNRS, UMR 6014 COBRA, Normandie Univ, UNIROUEN, INSA Rouen, 76000 Rouen, France
| | - Mario Waser
- Johannes Kepler University Linz, Institute of Organic Chemistry, Altenbergerstraße 69, 4040 Linz, Austria
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33
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Zhao X, Tian M, Ji L, Liu J, Lu K. Metal-Free sp3 C-SCF3 Coupling Reactions between Cycloketone Oxime Esters and S-trifluoromethyl 4-Methylbenzenesulfonothioate. Org Lett 2020; 22:863-866. [DOI: 10.1021/acs.orglett.9b04343] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Xia Zhao
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic−Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin, China, 300387
| | - Miaomiao Tian
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic−Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin, China, 300387
| | - Liangshuo Ji
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic−Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin, China, 300387
| | - Junjie Liu
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecules, Key Laboratory of Inorganic−Organic Hybrid Functional Material Chemistry, Ministry of Education, Tianjin Normal University, Tianjin, China, 300387
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, China, 300457
| | - Kui Lu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, Tianjin University of Science & Technology, Tianjin, China, 300457
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34
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Chen Y, Ma Y, Li L, Cui M, Li Z. Copper-catalyzed trifluoromethylthiolation-peroxidation of alkenes and allenes. Org Chem Front 2020. [DOI: 10.1039/d0qo00533a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cu-catalyzed trifluoromethylthiolation-peroxidation of alkenes and allenes using AgSCF3 and tert-butyl hydroperoxide has been developed. The method provides a variety of β-SCF3 and β-vinyl-SCF3 peroxides with excellent regio- and chemo-selectivities.
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Affiliation(s)
- Yuanjin Chen
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Yangyang Ma
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Liangkui Li
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Mingshuo Cui
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
| | - Zhiping Li
- Department of Chemistry
- Renmin University of China
- Beijing 100872
- China
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35
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Modak A, Pinter EN, Cook SP. Copper-Catalyzed, N-Directed Csp 3-H Trifluoromethylthiolation (-SCF 3) and Trifluoromethylselenation (-SeCF 3). J Am Chem Soc 2019; 141:18405-18410. [PMID: 31697070 DOI: 10.1021/jacs.9b10316] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
A direct and versatile copper-catalyzed trifluoromethylthiolation and trifluoromethylselenation of primary, secondary, and tertiary aliphatic C-H bonds was developed. The reaction provides direct access to molecules containing these emerging moieties in the presence of a wide range of common functional groups and in complex molecular environments.
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Affiliation(s)
- Atanu Modak
- Department of Chemistry , Indiana University , 800 East Kirkwood Avenue , Bloomington , Indiana 47405 , United States
| | - Emily N Pinter
- Department of Chemistry , Indiana University , 800 East Kirkwood Avenue , Bloomington , Indiana 47405 , United States
| | - Silas P Cook
- Department of Chemistry , Indiana University , 800 East Kirkwood Avenue , Bloomington , Indiana 47405 , United States
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36
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Zhang SB, Xu XH, Qing FL. Regioselective deoxygenative C H trifluoromethylthiolation of heteroaryl N-oxides with AgSCF3. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2019.109367] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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37
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Xu W, Wang W, Liu T, Xie J, Zhu C. Late-stage trifluoromethylthiolation of benzylic C-H bonds. Nat Commun 2019; 10:4867. [PMID: 31653853 PMCID: PMC6814834 DOI: 10.1038/s41467-019-12844-9] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Accepted: 10/04/2019] [Indexed: 11/09/2022] Open
Abstract
The benzylic positions in drugs are sites that readily react with cytochrome P450 oxidases via single-electron oxidation. New synthetic methodologies to incorporate a fluoroalkyl group at the benzylic site are continually being developed, and in this paper, we report a metal-free and site-selective organophotoredox-catalyzed trifluoromethylthiolation of benzylic C-H bonds for a wide variety of alkyl arenes and heteroarenes. The precise and predictive regioselectivity among various C(sp3)-H bonds originates from an inner-sphere benzylic radical initiation mechanism, and avoids the use of external oxidants or hydrogen atom abstractors. Its practicality stems from the trifluoromethylthiolation of a series of drugs and complex organic molecules, which is overwhelmingly selective for benzyl groups. This operationally simple protocol can provide a general and practical access to structurally diverse benzylic trifluoromethyl sulfides produced from ubiquitous benzylic C-H bonds. Large scale trifluoromethylthiolation can be achieved with continuous flow photoredox technology. Fluoroalkylation of C-H bonds is a class of reaction highly sought after in medicinal chemistry. Here, the authors report a regioselective organophotoredox-catalyzed, trifluoromethylthiolation of benzylic C-H bonds for a wide variety of alkyl (hetero)arenes, and demonstrate its utility in continuous flow.
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Affiliation(s)
- Wentao Xu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Wenliang Wang
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Tao Liu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China.
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry, Jiangsu Key Laboratory of Advanced Organic Materials, Chemistry and Biomedicine Innovation Center (ChemBIC), School of Chemistry and Chemical Engineering, Nanjing University, 210023, Nanjing, China. .,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, 200032, Shanghai, China.
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38
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Sun DW, Jiang M, Liu JT. Novel Bifunctionalization of Activated Methylene: Base-Promoted Trifluoromethylthiolation of β-Diketones with Trifluoromethanesulfinyl Chloride. Chemistry 2019; 25:10797-10802. [PMID: 31106453 DOI: 10.1002/chem.201901781] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/15/2019] [Indexed: 12/12/2022]
Abstract
A novel bifunctionalization of activated methylene was achieved successfully through the base-promoted trifluoromethylthiolation of β-diketones or β-ketoesters with trifluoromethanesulfinyl chloride. A series of α-trifluoromethylthiolated α-chloro-β-diketones and α-chloro-β-ketoesters were obtained in moderate to good yields under mild conditions. When β-diketones containing a phenyl group with a hydroxyl or amino substituent at the ortho position were used as substrates, intramolecular trifluoromethylthiolation/cyclization reaction took place to give the corresponding cyclic products. Furthermore, the protocol could be extended to perfluoroalkylthiolation with the sodium perfluoroalkanesulfinate/POCl3 system. On the basis of experimental results, plausible mechanisms are proposed.
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Affiliation(s)
- Dong-Wei Sun
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of, Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Science, 345 Lingling Road, Shanghai, 200032, China
| | - Min Jiang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of, Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Science, 345 Lingling Road, Shanghai, 200032, China
| | - Jin-Tao Liu
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of, Organic Chemistry, University of Chinese Academy of Science, Chinese Academy of Science, 345 Lingling Road, Shanghai, 200032, China
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39
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Qiu YF, Niu YJ, Wei X, Cao BQ, Wang XC, Quan ZJ. AgSCF3/Na2S2O8-Promoted Trifluoromethylthiolation/Cyclization of o-Propargyl Arylazides/o-Alkynyl Benzylazides: Synthesis of SCF3-Substituted Quinolines and Isoquinolines. J Org Chem 2019; 84:4165-4178. [DOI: 10.1021/acs.joc.9b00181] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yi-Feng Qiu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People’s Republic of China
| | - Yue-Jie Niu
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People’s Republic of China
| | - Xi Wei
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People’s Republic of China
| | - Bao-Qian Cao
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People’s Republic of China
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People’s Republic of China
| | - Zheng-Jun Quan
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, People’s Republic of China
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials, Lanzhou, Gansu 730070, People’s Republic of China
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40
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Wang F, Xu P, Cong F, Tang P. Silver-mediated oxidative functionalization of alkylsilanes. Chem Sci 2018; 9:8836-8841. [PMID: 30627401 PMCID: PMC6296296 DOI: 10.1039/c8sc03730b] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 09/22/2018] [Indexed: 11/21/2022] Open
Abstract
A general approach to the functionalization of aliphatic C-Si bonds in the presence of silver salts and oxidants has been reported. This strategy encompasses a range of valuable C-Si transformations, including the direct conversions of a C-Si bond to C-OCF3, C-OBz, C-OCOCF3, C-SCF3, C-SCN, and C-N3 bonds. Among them, trifluoromethoxylation of alkylsilanes is reported for the first time. In addition, mechanistic studies indicate that this reaction may proceed through a radical mechanism.
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Affiliation(s)
- Feng Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Peng Xu
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Fei Cong
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
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41
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He J, Chen C, Fu GC, Peters JC. Visible-Light-Induced, Copper-Catalyzed Three-Component Coupling of Alkyl Halides, Olefins, and Trifluoromethylthiolate to Generate Trifluoromethyl Thioethers. ACS Catal 2018; 8:11741-11748. [PMID: 31396434 DOI: 10.1021/acscatal.8b04094] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Photoinduced, copper-catalyzed coupling reactions are emerging as a powerful method for generating Csp3-Y (Y = C or heteroatom) bonds from alkyl electrophiles and nucleophiles. Corresponding three-component couplings of alkyl electrophiles, olefins, and nucleophiles have the potential to generate an additional Csp3-Y bond and to efficiently add functional groups to both carbons of an olefin, which serves as a readily available linchpin. In this report, we establish that a variety of electrophiles and a trifluoromethylthiolate nucleophile can add across an array of olefins (including styrenes and electron-poor olefins) in the presence of CuI/binap and blue-LED irradiation, thereby generating trifluoromethyl thioethers in good yield. The process tolerates a wide range of functional groups, and an initial survey of other nucleophiles (i.e., bromide, cyanide, and azide) suggests that this three-component coupling strategy is versatile. Mechanistic studies are consistent with a photoexcited Cu(I)/binap/SCF3 complex serving as a reductant to generate an alkyl radical from the electrophile, which likely reacts in turn with the olefin and a Cu(II)/SCF3 complex to afford the coupling product.
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Affiliation(s)
- Jian He
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Caiyou Chen
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Gregory C. Fu
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
| | - Jonas C. Peters
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125, United States
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42
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Bouchard A, Kairouz V, Manneveau M, Xiong HY, Besset T, Pannecoucke X, Lebel H. Continuous flow palladium-catalyzed trifluoromethylthiolation of C-H bonds. J Flow Chem 2018. [DOI: 10.1007/s41981-018-0023-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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43
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Zhao Y, Lin JH, Hang XC, Xiao JC. Ag-Mediated Trifluoromethylthiolation of Inert Csp3–H Bond. J Org Chem 2018; 83:14120-14125. [DOI: 10.1021/acs.joc.8b02207] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yue Zhao
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing 211800, China
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Jin-Hong Lin
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiao-Chun Hang
- Key Laboratory of Flexible Electronics (KLOFE) and Institute of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, 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, 345 Lingling Road, Shanghai 200032, China
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44
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Xiao Z, Liu Y, Zheng L, Zhou X, Xie Y, Liu C, Guo Y, Chen QY. Oxidative radical phosphonotrifluoromethylthiolation of unactivated alkenes with alkyl phosphonate, silver(I) trifluoromethanethiolate and potassium persulfate. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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45
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Xu J, Zhang Y, Qin T, Zhao X. Catalytic Regio- and Enantioselective Oxytrifluoromethylthiolation of Aliphatic Internal Alkenes by Neighboring Group Assistance. Org Lett 2018; 20:6384-6388. [DOI: 10.1021/acs.orglett.8b02672] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Jia Xu
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Yuanyuan Zhang
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Tian Qin
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
| | - Xiaodan Zhao
- Institute of Organic Chemistry & MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, P. R. China
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46
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Liu J, Zhao X, Jiang L, Yi W. Tf2
O-Promoted Trifluoromethythiolation of Various Arenes Using NaSO2
CF3. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800702] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jie Liu
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
| | - Xiaochun Zhao
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
| | - Lvqi Jiang
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
| | - Wenbin Yi
- Chemical Enginering college; Nanjing University of Science and Technology; 200 Xiao Ling Wei Street, Nanjing, Jiangsu People's Republic of China
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47
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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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48
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Sharma AK, Yadav AK, Singh KN. Silver-Catalyzed Decarboxylative Trifluoromethylthiolation of Cinnamic Acids: An Easy Access to α-Trifluoromethylthiolated Ketones. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anup Kumar Sharma
- Department of Chemistry; Centre of Advanced Study); Institute of Science; Banaras Hindu University; Varanasi 221005 India
| | - Arvind Kumar Yadav
- Department of Chemistry; Centre of Advanced Study); Institute of Science; Banaras Hindu University; Varanasi 221005 India
| | - Krishna Nand Singh
- Department of Chemistry; Centre of Advanced Study); Institute of Science; Banaras Hindu University; Varanasi 221005 India
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49
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Li J, Yang Z, Guo R, Jin MY, Wang JJ. Atom-Economical and Stereoselective Difunctionalization of Electron-Withdrawing Alkynes with N
-Trifluoromethylthiophthalimide. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800351] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Juncheng Li
- Department of Chemistry; Southern University of Science and Technology; Shenzhen Guangdong 518055 China
| | - Zhiping Yang
- Department of Chemistry; Southern University of Science and Technology; Shenzhen Guangdong 518055 China
| | - Rui Guo
- Department of Chemistry; Southern University of Science and Technology; Shenzhen Guangdong 518055 China
| | - Ming Yu Jin
- Department of Chemistry; Southern University of Science and Technology; Shenzhen Guangdong 518055 China
- Academy for Advanced Interdisciplinary Studies; Southern University of Science and Technology; Shenzhen Guangdong 518055 China
| | - Jun Joelle Wang
- Department of Chemistry; Southern University of Science and Technology; Shenzhen Guangdong 518055 China
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50
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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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