51
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Lu X, Kawazu R, Song J, Yoshigoe Y, Torigoe T, Kuninobu Y. Regioselective C-H Trifluoromethylation of Aromatic Compounds by Inclusion in Cyclodextrins. Org Lett 2021; 23:4327-4331. [PMID: 33989009 DOI: 10.1021/acs.orglett.1c01259] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A regioselective radical C-H trifluoromethylation of aromatic compounds was developed using cyclodextrins (CDs) as additives. The C-H trifluoromethylation proceeded with high regioselectivity to afford the product in good yield, even on the gram scale. In the presence of CDs, some substrates underwent a single trifluoromethylation selectively, whereas mixtures of single- and double-trifluoromethylated products were formed in the absence of the CD. 1H NMR experiments indicated that the regioselectivity was controlled by the inclusion of a substrate inside the CD cavity.
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Affiliation(s)
- Xu Lu
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - Ryohei Kawazu
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - Jizhou Song
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - Yusuke Yoshigoe
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - Takeru Torigoe
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan.,Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
| | - Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan.,Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga-shi, Fukuoka 816-8580, Japan
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52
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Wang L, Perveen S, Ouyang Y, Zhang S, Jiao J, He G, Nie Y, Li P. Well-Defined, Versatile and Recyclable Half-Sandwich Nickelacarborane Catalyst for Selective Carbene-Transfer Reactions. Chemistry 2021; 27:5754-5760. [PMID: 33458881 DOI: 10.1002/chem.202005014] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/30/2020] [Indexed: 11/11/2022]
Abstract
Catalytic carbene-transfer reactions constitute a class of highly useful transformations in organic synthesis. Although catalysts based on a range of transition-metals have been reported, the readily accessible nickel(II)-based complexes have been rarely used. Herein, an air-stable nickel(II)-carborane complex is reported as a well-defined, versatile and recyclable catalyst for selective carbene transfer reactions with low catalyst loading under mild conditions. This catalyst is effective for several types of reactions including diastereoselective cyclopropanation, epoxidation, selective X-H insertions (X = C, N, O, S, Si), particularly for the unprotected substrates. This represents a rare example of carborane ligands in base metal catalysis.
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Affiliation(s)
- Linghua Wang
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, P. R. China
| | - Saima Perveen
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Yizhao Ouyang
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, P. R. China
| | - Shuai Zhang
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, P. R. China
| | - Jiao Jiao
- Department of Applied Chemistry, School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China.,Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
| | - Gang He
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, P. R. China
| | - Yong Nie
- Institute for Smart Materials & Engineering, University of Jinan, Jinan, Shandong, 250022, P. R. China
| | - Pengfei Li
- Frontier Institute of Science and Technology, Xi'an Jiaotong University, Xi'an, Shaanxi, 710054, P. R. China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, 300071, P. R. China.,Xi'an Key Laboratory of Sustainable Energy Materials Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi, 710049, P. R. China
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53
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Kuninobu Y, Torigoe T. Regioselective C-H Trifluoromethylation of Heteroaromatic Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200302] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Yoichiro Kuninobu
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
| | - Takeru Torigoe
- Institute for Materials Chemistry and Engineering, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
- Department of Molecular and Material Sciences, Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, 6-1 Kasugakoen, Kasuga, Fukuoka 816-8580, Japan
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54
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Vaishak TB, Soumya PK, Saranya PV, Anilkumar G. Recent advances and prospects in the iron-catalyzed trifluoromethylation reactions. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00499a] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The development of effective methods to create a C–CF3 bond has attracted great attention in organofluorine chemistry and also in homogeneous catalysis.
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Affiliation(s)
| | | | | | - Gopinathan Anilkumar
- School of Chemical Sciences
- Mahatma Gandhi University
- Kottayam
- 686560 India
- Advanced Molecular Materials Research Centre (AMMRC)
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55
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Abstract
This review highlights important developments in nickel-catalysed mono-, di- and tri-fluoromethylation, trifluoromethylthiolation and trifluoromethylselenolation.
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Affiliation(s)
- Pravya P. Nair
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
| | - Rose Mary Philip
- School of Chemical Sciences, Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
| | - Gopinathan Anilkumar
- Institute for Integrated Programmes and Research in Basic Sciences (IIRBS), Mahatma Gandhi University, Priyadarsini Hills P O, Kottayam, Kerala, 686560 India
- 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
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56
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Le Vaillant F, Reijerse EJ, Leutzsch M, Cornella J. Dialkyl Ether Formation at High-Valent Nickel. J Am Chem Soc 2020; 142:19540-19550. [PMID: 33143423 PMCID: PMC7677934 DOI: 10.1021/jacs.0c07381] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Indexed: 12/15/2022]
Abstract
In this article, we investigated the I2-promoted cyclic dialkyl ether formation from 6-membered oxanickelacycles originally reported by Hillhouse. A detailed mechanistic investigation based on spectroscopic and crystallographic analysis revealed that a putative reductive elimination to forge C(sp3)-OC(sp3) using I2 might not be operative. We isolated a paramagnetic bimetallic NiIII intermediate featuring a unique Ni2(OR)2 (OR = alkoxide) diamond-like core complemented by a μ-iodo bridge between the two Ni centers, which remains stable at low temperatures, thus permitting its characterization by NMR, EPR, X-ray, and HRMS. At higher temperatures (>-10 °C), such bimetallic intermediate thermally decomposes to afford large amounts of elimination products together with iodoalkanols. Observation of the latter suggests that a C(sp3)-I bond reductive elimination occurs preferentially to any other challenging C-O bond reductive elimination. Formation of cyclized THF rings is then believed to occur through cyclization of an alcohol/alkoxide to the recently forged C(sp3)-I bond. The results of this article indicate that the use of F+ oxidants permits the challenging C(sp3)-OC(sp3) bond formation at a high-valent nickel center to proceed in good yields while minimizing deleterious elimination reactions. Preliminary investigations suggest the involvement of a high-valent bimetallic NiIII intermediate which rapidly extrudes the C-O bond product at remarkably low temperatures. The new set of conditions permitted the elusive synthesis of diethyl ether through reductive elimination, a remarkable feature currently beyond the scope of Ni.
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Affiliation(s)
- Franck Le Vaillant
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Edward J. Reijerse
- Max-Planck-Institut
für Chemische Energiekonversion, Stiftstrasse 34−36, Mülheim an der Ruhr 45470, Germany
| | - Markus Leutzsch
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Josep Cornella
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
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57
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McDarmont SL, McMillen CD, Temelso B, Pienkos JA. Exploiting a C–F Activation Strategy to Generate Novel Tris(pyrazolyl)methane Ligands. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000270] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sarah L. McDarmont
- Department of Chemistry & Physics The University of Tennessee at Chattanooga Chattanooga TN USA
| | | | - Berhane Temelso
- Division of Information Technology College of Charleston Charleston SC USA
| | - Jared A. Pienkos
- Department of Chemistry & Physics The University of Tennessee at Chattanooga Chattanooga TN USA
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58
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Pang Y, Lee JW, Kubota K, Ito H. Solid‐State Radical C−H Trifluoromethylation Reactions Using Ball Milling and Piezoelectric Materials. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009844] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yadong Pang
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Joo Won Lee
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Koji Kubota
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Hajime Ito
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
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59
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Pang Y, Lee JW, Kubota K, Ito H. Solid‐State Radical C−H Trifluoromethylation Reactions Using Ball Milling and Piezoelectric Materials. Angew Chem Int Ed Engl 2020; 59:22570-22576. [DOI: 10.1002/anie.202009844] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Yadong Pang
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Joo Won Lee
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Koji Kubota
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
| | - Hajime Ito
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD) Hokkaido University Sapporo Hokkaido 060-8628 Japan
- Division of Applied Chemistry Graduate School of Engineering Hokkaido University Sapporo Hokkaido 060-8628 Japan
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60
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61
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Hu W, Pan S, Xu X, Vicic DA, Qing F. Nickel‐Mediated Trifluoromethylation of Phenol Derivatives by Aryl C−O Bond Activation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202004116] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Wei‐Qiang Hu
- 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 Shanghai 200032 China
| | - Shen Pan
- 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 Shanghai 200032 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 Shanghai 200032 China
| | - David A. Vicic
- Department of Chemistry Lehigh University 6 E. Packer Avenue Bethlehem PA 18015 USA
| | - 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 Shanghai 200032 China
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62
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Burai Patrascu M, Pottel J, Pinus S, Bezanson M, Norrby PO, Moitessier N. From desktop to benchtop with automated computational workflows for computer-aided design in asymmetric catalysis. Nat Catal 2020. [DOI: 10.1038/s41929-020-0468-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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63
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Barata‐Vallejo S, Postigo A. New Visible‐Light‐Triggered Photocatalytic Trifluoromethylation Reactions of Carbon–Carbon Multiple Bonds and (Hetero)Aromatic Compounds. Chemistry 2020; 26:11065-11084. [DOI: 10.1002/chem.202000856] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/14/2020] [Indexed: 01/10/2023]
Affiliation(s)
- Sebastian Barata‐Vallejo
- Department of Organic ChemistryUniversidad de Buenos Aires, Facultad de Farmacia y Bioquímica Junin 954 CP 1113 Buenos Aires Argentina
- ISOFConsiglio Nazionale delle Ricerche Via P. Gobetti 101 40129 Bologna Italy
| | - Al Postigo
- Department of Organic ChemistryUniversidad de Buenos Aires, Facultad de Farmacia y Bioquímica Junin 954 CP 1113 Buenos Aires Argentina
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64
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Hu WQ, Pan S, Xu XH, Vicic DA, Qing FL. Nickel-Mediated Trifluoromethylation of Phenol Derivatives by Aryl C-O Bond Activation. Angew Chem Int Ed Engl 2020; 59:16076-16082. [PMID: 32452144 DOI: 10.1002/anie.202004116] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/15/2020] [Indexed: 12/18/2022]
Abstract
The increasing pharmaceutical importance of trifluoromethylarenes has stimulated the development of more efficient trifluoromethylation reactions. Tremendous efforts have focused on copper- and palladium-mediated/catalyzed trifluoromethylation of aryl halides. In contrast, no general method exists for the conversion of widely available inert electrophiles, such as phenol derivatives, into the corresponding trifluoromethylated arenes. Reported herein is a practical nickel-mediated trifluoromethylation of phenol derivatives with readily available trimethyl(trifluoromethyl)silane (TMSCF3 ). The strategy relies on PMe3 -promoted oxidative addition and transmetalation, and CCl3 CN-induced reductive elimination. The broad utility of this transformation has been demonstrated through the direct incorporation of trifluoromethyl into aromatic and heteroaromatic systems, including biorelevant compounds.
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Affiliation(s)
- Wei-Qiang Hu
- 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, Shanghai, 200032, China
| | - Shen Pan
- 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, Shanghai, 200032, 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, Shanghai, 200032, China
| | - David A Vicic
- Department of Chemistry, Lehigh University, 6 E. Packer Avenue, Bethlehem, PA, 18015, USA
| | - 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, Shanghai, 200032, China
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65
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Hys VY, Shevchuk OI, Vashchenko BV, Karpenko OV, Gorlova AO, Grygorenko OO. Functionalization of 2-Trifluoromethyl-1H
-pyrrole: A Convenient Entry into Advanced Fluorinated Building Blocks Including all Isomeric 2-(Trifluoromethyl)prolines. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000519] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Vasyl Yu. Hys
- Enamine Ltd.; Chervonotkatska Street 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv; Volodymyrska Street 60 01601 Kyiv Ukraine
| | | | - Bohdan V. Vashchenko
- Enamine Ltd.; Chervonotkatska Street 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv; Volodymyrska Street 60 01601 Kyiv Ukraine
| | | | - Alina O. Gorlova
- Enamine Ltd.; Chervonotkatska Street 78 02094 Kyiv Ukraine
- Institute of Organic Chemistry; National Academy of Sciences of Ukraine; Murmanska Street 5 02094 Kyiv Ukraine
| | - Oleksandr O. Grygorenko
- Enamine Ltd.; Chervonotkatska Street 78 02094 Kyiv Ukraine
- Taras Shevchenko National University of Kyiv; Volodymyrska Street 60 01601 Kyiv Ukraine
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66
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Abstract
In spite of only a few naturally occurring products having one or more fluorine atoms, organofluorine compounds have been widely utilized in pharmaceutical, agrochemical, and functional material science fields due to the characteristic properties of the fluorine atom. Therefore, the development of new methods for the introduction of fluorine-containing functional groups has been a long-standing research topic. This article discusses our contributions to this area. The first topic is on the trifluoromethylations of C-C multiple bonds using Togni reagent based on our working hypothesis that hypervalent iodine could be activated by coordination of the carbonyl moiety to the Lewis acid catalyst. The second topic relates to asymmetric fluorofunctionalization of alkenes. A newly designed phase-transfer catalyst consisting of a carboxylate anion functioning as a phase-transfer agent and a primary hydroxyl group as a site that captures the anionic substrate was revealed to be an effective catalyst for asymmetric fluorolactonization. Inspired by the mechanistic studies of fluorolactonization, we produced a linked binaphthyl dicarboxylate catalyst, which catalyzes the 6-endo-fluorocyclization and the deprotonative fluorination of allylic amides in a highly enantioselective manner. The third topic is on C-H fluorofunctionalizations using either catalysis or photoactivation. Benzylic trifluoromethylation, which is still a rare reaction, using Togni reagent and aromatic C-H trifluoromethylation using Umemoto reagent under simple photoirradiation conditions were achieved. In addition, the Csp3-H fluorination of alkyl phthalimide derivatives is demonstrated.
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67
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Nebra N. High-Valent Ni III and Ni IV Species Relevant to C-C and C-Heteroatom Cross-Coupling Reactions: State of the Art. Molecules 2020; 25:molecules25051141. [PMID: 32143336 PMCID: PMC7179250 DOI: 10.3390/molecules25051141] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 11/16/2022] Open
Abstract
Ni catalysis constitutes an active research arena with notable applications in diverse fields. By analogy with its parent element palladium, Ni catalysts provide an appealing entry to build molecular complexity via cross-coupling reactions. While Pd catalysts typically involve a M0/MII redox scenario, in the case of Ni congeners the mechanistic elucidation becomes more challenging due to their innate properties (like enhanced reactivity, propensity to undergo single electron transformations vs. 2e− redox sequences or weaker M–Ligand interaction). In recent years, mechanistic studies have demonstrated the participation of high-valent NiIII and NiIV species in a plethora of cross-coupling events, thus accessing novel synthetic schemes and unprecedented transformations. This comprehensive review collects the main contributions effected within this topic, and focuses on the key role of isolated and/or spectroscopically identified NiIII and NiIV complexes. Amongst other transformations, the resulting NiIII and NiIV compounds have efficiently accomplished: i) C–C and C–heteroatom bond formation; ii) C–H bond functionalization; and iii) N–N and C–N cyclizative couplings to forge heterocycles.
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Affiliation(s)
- Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier/CNRS UMR 5069, 118 Route de Narbonne, 31062 Toulouse, France
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68
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Ji YL, He XH, Li G, Ai YY, Li HP, Peng C, Han B. Substrate-directed chemo- and regioselective synthesis of polyfunctionalized trifluoromethylarenes via organocatalytic benzannulation. Org Chem Front 2020. [DOI: 10.1039/c9qo01436e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Highly chemo- and regioselective substrate-directed benzannulation of trisubstituted CF3-alkenes and 2-benzylidenemalononitriles or 2-nitroallylic acetates has been achieved via Michael-initiated [4 + 2] or Rauhut–Currier-initiated [3 + 3] annulation.
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Affiliation(s)
- Yan-Ling Ji
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
| | - Xiang-Hong He
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
| | - Guo Li
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
| | - Yue-Yan Ai
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
| | - He-Ping Li
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
| | - Cheng Peng
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
| | - Bo Han
- Hospital of Chengdu University of Traditional Chinese Medicine
- State Key Laboratory of Southwestern Chinese Medicine Resources
- School of Pharmacy
- Chengdu University of Traditional Chinese Medicine
- Chengdu
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