1
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Bannykh A, Pihko PM. Carboxylate-Catalyzed C-Silylation of Terminal Alkynes. Org Lett 2024; 26:1991-1995. [PMID: 38428925 PMCID: PMC10949233 DOI: 10.1021/acs.orglett.3c04213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 02/01/2024] [Accepted: 02/07/2024] [Indexed: 03/03/2024]
Abstract
A carboxylate-catalyzed, metal-free C-silylation protocol for terminal alkynes is reported using a quaternary ammonium pivalate as the catalyst and commercially available N,O-bis(silyl)acetamides as silylating agents. The reaction proceeds under mild conditions, tolerates a range of functionalities, and enables concomitant O- or N-silylation of acidic OH or NH groups. A Hammett ρ value of +1.4 ± 0.1 obtained for para-substituted 2-arylalkynes is consistent with the proposed catalytic cycle involving a turnover-determining deprotonation step.
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Affiliation(s)
- Anton Bannykh
- Department of Chemistry and NanoScience
Center, University of Jyväskylä, P.O.B. 35, FI-40014 University of Jyväskylä, Finland
| | - Petri M. Pihko
- Department of Chemistry and NanoScience
Center, University of Jyväskylä, P.O.B. 35, FI-40014 University of Jyväskylä, Finland
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2
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Lucas Kane D, Figula BC, Balaraman K, Bertke JA, Wolf C. General alkyl fluoride functionalization via short-lived carbocation-organozincate ion pairs. Nat Commun 2024; 15:1866. [PMID: 38424080 PMCID: PMC10904780 DOI: 10.1038/s41467-024-45756-4] [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: 08/31/2023] [Accepted: 02/05/2024] [Indexed: 03/02/2024] Open
Abstract
Fluorinated organic compounds are frequently used across the chemical and life sciences. Although a large, structurally diverse pool of alkyl fluorides is nowadays available, synthetic applications trail behind the widely accepted utility of other halides. We envisioned that C(sp2)-C(sp3) cross-coupling reactions of alkyl fluorides with fluorophilic organozinc compounds should be possible through a heterolytic mechanism that involves short-lived ion pairs and uses the stability of the Zn-F bond as the thermodynamic driving force. This would be mechanistically different from previously reported radical reactions and overcome long-standing limitations of organometallic cross-coupling methodology, including competing β-hydride elimination, homodimerization and hydrodefluorination. Here, we show a practical Csp3-F bond functionalization method that expands the currently restricted synthetic space of unactivated primary, secondary and tertiary C(sp3)-F bonds but also uses benzylic, propargylic and acyl fluorides. Many functional groups and sterically demanding substrates are tolerated, which allows practical carbon-carbon bond formation and late-stage functionalization.
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Affiliation(s)
- D Lucas Kane
- Georgetown University, Chemistry Department, Washington, DC, 20057, USA
| | - Bryan C Figula
- Georgetown University, Chemistry Department, Washington, DC, 20057, USA
| | - Kaluvu Balaraman
- Georgetown University, Chemistry Department, Washington, DC, 20057, USA
| | - Jeffery A Bertke
- Georgetown University, Chemistry Department, Washington, DC, 20057, USA
| | - Christian Wolf
- Georgetown University, Chemistry Department, Washington, DC, 20057, USA.
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3
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Riuttamäki S, Bannykh A, Pihko PM. Carboxylate Catalysis: A Catalytic O-Silylative Aldol Reaction of Aldehydes and Ethyl Diazoacetate. J Org Chem 2023; 88:14396-14403. [PMID: 37768196 PMCID: PMC10594658 DOI: 10.1021/acs.joc.3c01304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Indexed: 09/29/2023]
Abstract
A mild catalytic variant of the aldol reaction between ethyl diazoacetate and aldehydes is described using a combination of N,O-bis(trimethylsilyl)acetamide and catalytic tetramethylammonium pivalate as catalyst. The reaction proceeds rapidly at ambient temperature to afford the O-silylated aldol products in good to excellent yield, and the acetamide byproducts can be removed by simple filtration.
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Affiliation(s)
| | | | - Petri M. Pihko
- Department of Chemistry and
NanoScience Center, University of Jyväskylä, P.O.B. 35, Jyväskylä FI-40014, Finland
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4
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Synthesis of mono-fluoromethyl 6,5-heteroaromatic bicycles using 1,3-difluoroacetone as a cyclising reagent. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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5
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Song X, Li YX, Zhou L, Liu N, Wu ZQ. Controlled Synthesis of One-Handed Helical Polymers Carrying Achiral Organoiodine Pendants for Enantioselective Synthesis of Quaternary All-Carbon Stereogenic Centers. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c00810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Xue Song
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
| | - Yan-Xiang Li
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
| | - Li Zhou
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
| | - Na Liu
- Department of Polymer Science and Engineering, School of Chemistry and Chemical Engineering, and Anhui Key Laboratory of Advanced Catalytic Materials and Reaction Engineering, Hefei University of Technology, Hefei 230009, Anhui, China
| | - Zong-Quan Wu
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
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6
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Zhou J, Jiang B, Fujihira Y, Zhao Z, Imai T, Shibata N. Catalyst-free carbosilylation of alkenes using silyl boronates and organic fluorides via selective C-F bond activation. Nat Commun 2021; 12:3749. [PMID: 34145264 PMCID: PMC8213744 DOI: 10.1038/s41467-021-24031-w] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 06/01/2021] [Indexed: 02/05/2023] Open
Abstract
A regioselective carbosilylation of alkenes has emerged as a powerful strategy to access molecules with functionalized silylated alkanes, by incorporating silyl and carbon groups across an alkene double bond. However, to the best of our knowledge, organic fluorides have never been used in this protocol. Here we disclose the catalyst-free carbosilylation of alkenes using silyl boronates and organic fluorides mediated by tBuOK. The main feature of this transformation is the selective activation of the C-F bond of an organic fluoride by the silyl boronate without undergoing potential side-reactions involving C-O, C-Cl, heteroaryl-CH, and even CF3 groups. Various silylated alkanes with tertiary or quaternary carbon centers that have aromatic, hetero-aromatic, and/or aliphatic groups at the β-position are synthesized in a single step from substituted or non-substituted aryl alkenes. An intramolecular variant of this carbosilylation is also achieved via the reaction of a fluoroarene with a ω-alkenyl side chain and a silyl boronate.
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Affiliation(s)
- Jun Zhou
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Bingyao Jiang
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Yamato Fujihira
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Zhengyu Zhao
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Takanori Imai
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan.
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, Japan.
- Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, Jinhua, China.
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7
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Roagna G, Ascough DMH, Ibba F, Vicini AC, Fontana A, Christensen KE, Peschiulli A, Oehlrich D, Misale A, Trabanco AA, Paton RS, Pupo G, Gouverneur V. Hydrogen Bonding Phase-Transfer Catalysis with Ionic Reactants: Enantioselective Synthesis of γ-Fluoroamines. J Am Chem Soc 2020; 142:14045-14051. [PMID: 32608977 PMCID: PMC7441491 DOI: 10.1021/jacs.0c05131] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
Ammonium
salts are used as phase-transfer catalysts for fluorination
with alkali metal fluorides. We now demonstrate that these organic
salts, specifically azetidinium triflates, are suitable substrates
for enantioselective ring opening with CsF and a chiral bis-urea catalyst. This process, which highlights the ability of hydrogen
bonding phase-transfer catalysts to couple two ionic reactants, affords
enantioenriched γ-fluoroamines in high yields. Mechanistic studies
underline the role of the catalyst for phase-transfer, and computed
transition state structures account for the enantioconvergence observed
for mixtures of achiral azetidinium diastereomers. The N-substituents
in the electrophile influence the reactivity, but the configuration
at nitrogen is unimportant for the enantioselectivity.
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Affiliation(s)
- Giulia Roagna
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - David M H Ascough
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Francesco Ibba
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Anna Chiara Vicini
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Alberto Fontana
- Discovery Chemistry, Janssen Research & Development, Janssen-Cilag S.A., Calle Jarama 75A, 45007 Toledo, Spain
| | - Kirsten E Christensen
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Aldo Peschiulli
- Discovery Sciences Medicinal Chemistry, Janssen Research & Development, Janssen Pharmaceutica N.V., Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Daniel Oehlrich
- Discovery Sciences Medicinal Chemistry, Janssen Research & Development, Janssen Pharmaceutica N.V., Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Antonio Misale
- Discovery Chemistry, Janssen Research & Development, Janssen-Cilag S.A., Calle Jarama 75A, 45007 Toledo, Spain
| | - Andrés A Trabanco
- Discovery Chemistry, Janssen Research & Development, Janssen-Cilag S.A., Calle Jarama 75A, 45007 Toledo, Spain
| | - Robert S Paton
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K.,Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Gabriele Pupo
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
| | - Véronique Gouverneur
- University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford OX1 3TA, U.K
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8
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Butcher TW, Yang JL, Amberg WM, Watkins NB, Wilkinson ND, Hartwig JF. Desymmetrization of difluoromethylene groups by C-F bond activation. Nature 2020; 583:548-553. [PMID: 32480398 PMCID: PMC10484566 DOI: 10.1038/s41586-020-2399-1] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 05/26/2020] [Indexed: 12/16/2022]
Abstract
Tertiary stereogenic centres containing one fluorine atom are valuable for medicinal chemistry because they mimic common tertiary stereogenic centres containing one hydrogen atom, but they possess distinct charge distribution, lipophilicity, conformation and metabolic stability1-3. Although tertiary stereogenic centres containing one hydrogen atom are often set by enantioselective desymmetrization reactions at one of the two carbon-hydrogen (C-H) bonds of a methylene group, tertiary stereocentres containing fluorine have not yet been constructed by the analogous desymmetrization reaction at one of the two carbon-fluorine (C-F) bonds of a difluoromethylene group3. Fluorine atoms are similar in size to hydrogen atoms but have distinct electronic properties, causing C-F bonds to be exceptionally strong and geminal C-F bonds to strengthen one another4. Thus, exhaustive defluorination typically dominates over the selective replacement of a single C-F bond, hindering the development of the enantioselective substitution of one fluorine atom to form a stereogenic centre5,6. Here we report the catalytic, enantioselective activation of a single C-F bond in an allylic difluoromethylene group to provide a broad range of products containing a monofluorinated tertiary stereogenic centre. By combining a tailored chiral iridium phosphoramidite catalyst, which controls regioselectivity, chemoselectivity and enantioselectivity, with a fluorophilic activator, which assists the oxidative addition of the C-F bond, these reactions occur in high yield and selectivity. The design principles proposed in this work extend to palladium-catalysed benzylic substitution, demonstrating the generality of the approach.
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Affiliation(s)
- Trevor W Butcher
- Department of Chemistry, University of California, Berkeley, CA, USA
| | - Jonathan L Yang
- Department of Chemistry, University of California, Berkeley, CA, USA
| | - Willi M Amberg
- Department of Chemistry, University of California, Berkeley, CA, USA
| | | | | | - John F Hartwig
- Department of Chemistry, University of California, Berkeley, CA, USA.
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9
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Umemoto T, O’Hagan D, Thrasher JS. Professor Norio Shibata, Nagoya Institute of Technology – Recipient of the 2019 American Chemical Society Award for Creative Work in Fluorine Chemistry. J Fluor Chem 2020. [DOI: 10.1016/j.jfluchem.2020.109515] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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10
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Yingcharoen P, Natongchai W, Poater A, D' Elia V. Intertwined chemistry of hydroxyl hydrogen-bond donors, epoxides and isocyanates in the organocatalytic synthesis of oxazolidinones versus isocyanurates: rational catalytic investigation and mechanistic understanding. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00987c] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The efficiency and chemoselectivity of the cycloaddition of isocyanates to epoxides to afford oxazolidinones were investigated using hydroxyl hydrogen-bond donors as organocatalysts.
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Affiliation(s)
- Prapussorn Yingcharoen
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Rayong
- Thailand
| | - Wuttichai Natongchai
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Rayong
- Thailand
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química
- Universitat de Girona
- 17003 Girona
- Spain
| | - Valerio D' Elia
- Department of Materials Science and Engineering
- School of Molecular Science and Engineering
- Vidyasirimedhi Institute of Science and Technology (VISTEC)
- Rayong
- Thailand
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11
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Wang J, Ogawa Y, Shibata N. Activation of Saturated Fluorocarbons to Synthesize Spirobiindanes, Monofluoroalkenes, and Indane Derivatives. iScience 2019; 17:132-143. [PMID: 31276957 PMCID: PMC6612000 DOI: 10.1016/j.isci.2019.06.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Revised: 06/03/2019] [Accepted: 06/12/2019] [Indexed: 12/15/2022] Open
Abstract
Fluorinated organic compounds are produced in abundance by the pharmaceutical and agrochemical industry, making such compounds attractive as building blocks for further functionalization. Unfortunately, activation of C(sp3)-F bond in saturated fluorocarbons, especially for aliphatic gem-difluoroalkanes, remains challenging. Here we describe the selective activation of inert C(sp3)-F bonds catalyzed by B(C6F5)3. In hexafluoro-2-propanol (HFIP), chemically robust aliphatic gem-difluorides are converted in high yields to the corresponding substituted 2,2′,3,3′-tetrahydro-1,1′-spirobiindenes via a B(C6F5)3-catalyzed intramolecular cascade Friedel-Crafts cyclization, not requiring a silicon-based trapping reagent. However, in the absence of a hydrogen-bonding donor solvent such as HFIP, the aliphatic gem-difluorides preferentially engage in a defluorination/elimination process that provides monofluorinated alkenes in good yields. Furthermore, a series of substituted 1-alkyl-2,3-dihydro-1H-indenes was obtained in high yield from the B(C6F5)3-catalyzed defluorinative cyclization of aliphatic secondary monofluorides in HFIP. The protocol could inspire development of a new class of main-group Lewis acid-catalyzed C(sp3)-F bond activation in general unactivated fluorocarbons. C(sp3)-F bond activation in general unactivated fluorocarbons The activation of C(sp3)-F bonds in aliphatic gem-difluoroalkanes The selective activation of inert C(sp3)-F bonds catalyzed by B(C6F5)3 An intramolecular cascade defluorinative Friedel-Crafts cyclization
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Affiliation(s)
- Jiandong Wang
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan
| | - Yuta Ogawa
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan; Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, 688 Yingbin Avenue, 321004 Jinhua, China.
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12
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Jiang LF, Ren BT, Li B, Zhang GY, Peng Y, Guan ZY, Deng QH. Nucleophilic Substitution of gem-Difluoroalkenes with TMSNu Promoted by Catalytic Amounts of Cs 2CO 3. J Org Chem 2019; 84:6557-6564. [PMID: 31090405 DOI: 10.1021/acs.joc.9b00999] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The efficient and practical nucleophilic cyanation and trifluoromethylation with appropriate trimethylsilyl nucleophiles were developed. Catalytic amounts of cheap and nontoxic Cs2CO3 were used to maintain a sufficiently high concentration of nucleophilic anion (CN- or CF3-) which could begin the catalytic cycle. The present methodologies provide diverse functionalized monofluoroalkenes bearing a cyano and trifluoromethyl group with excellent to moderate stereoselectivities.
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Affiliation(s)
- Ling-Feng Jiang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
| | - Bing-Tao Ren
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
| | - Bin Li
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
| | - Guang-Yi Zhang
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
| | - Yi Peng
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
| | - Zhen-Yu Guan
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
| | - Qing-Hai Deng
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials , Shanghai Normal University , Shanghai 200234 , P.R. China
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13
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Wang J, Tanaka J, Tokunaga E, Shibata N. Catalytic Desymmetrization of 1,3‐Difluoropropan‐2‐ols via C−F Bond Activation Using a Phosphazene Base Affords Monofluoromethyl‐Substituted Epoxides. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900157] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Jiandong Wang
- Department of Nanopharmaceutical SciencesNagoya Institute of Technology Gokiso, Showa Nagoya 466-8555 Japan
| | - Junki Tanaka
- Department of Nanopharmaceutical SciencesNagoya Institute of Technology Gokiso, Showa Nagoya 466-8555 Japan
| | - Etsuko Tokunaga
- Department of Nanopharmaceutical SciencesNagoya Institute of Technology Gokiso, Showa Nagoya 466-8555 Japan
| | - Norio Shibata
- Department of Nanopharmaceutical SciencesNagoya Institute of Technology Gokiso, Showa Nagoya 466-8555 Japan
- Institute of Advanced Fluorine-Containing MaterialsZhejiang Normal University 688 Yingbin Avenue 321004 Jinhua, China
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14
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Cui B, Jia S, Tokunaga E, Shibata N. Defluorosilylation of fluoroarenes and fluoroalkanes. Nat Commun 2018; 9:4393. [PMID: 30349026 PMCID: PMC6197272 DOI: 10.1038/s41467-018-06830-w] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Accepted: 09/28/2018] [Indexed: 11/12/2022] Open
Abstract
Direct activation of carbon–fluorine bonds (C–F) to introduce the silyl or boryl groups and generate valuable carbon–silicon (C–Si) or carbon–boron (C–B) bonds is important in the development of synthetically useful reactions, owing to the unique opportunities for further derivatization to achieve more complex molecules. Despite considerable progress of C–F bond activation to construct carbon–carbon (C–C) and carbon–heteroatom (C–X) bond formation, the defluorosilylation via C–F cleavage has been rarely demonstrated. Here, we report an ipso-silylation of aryl fluorides via cleavage of unactivated C–F bonds by a Ni catalyst under mild conditions and without the addition of any external ligand. Alkyl fluorides are also directly converted into the corresponding alkyl silanes under similar conditions, even in the absence of the Ni catalyst. Applications of this protocol in late-stage defluorosilylation of potentially bioactive pharmaceuticals and in further derivatizations are also carried out. Transformation of strong C-F bonds into C-Si bonds is an extremely useful strategy for further derivatization of organic molecules. Here, the authors report a nickel-catalyzed strategy to convert aryl fluorides into sylylated arenes while defluorosilylation of alkyl fluorides is achieved under metal-free conditions.
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Affiliation(s)
- Benqiang Cui
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Shichong Jia
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Etsuko Tokunaga
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences and Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya, 466-8555, Japan. .,Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, 688 Yingbin Avenue, 321004, Jinhua, China.
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15
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Drouin M, Paquin JF. Enantioselective palladium-catalyzed addition of malonates to 3,3-difluoropropenes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.08.034] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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16
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Wu LH, Cheng JK, Shen L, Shen ZL, Loh TP. Visible Light-Mediated Trifluoromethylation of Fluorinated Alkenes via C−F Bond Cleavage. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800740] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Liu-Hai Wu
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371, Singapore
| | - Jun-Kee Cheng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371, Singapore
| | - Liang Shen
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371, Singapore
| | - Zhi-Liang Shen
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials; Nanjing Tech University; Nanjing 210009 People's Republic of China
| | - Teck-Peng Loh
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials; Nanjing Tech University; Nanjing 210009 People's Republic of China
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences; Nanyang Technological University; Singapore 637371, Singapore
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17
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Hsieh MT, Lee KH, Kuo SC, Lin HC. Lewis acid-mediated defluorinative [3+2] cycloaddition/aromatization cascade of 2,2-difluoroethanol systems with nitriles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701581] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Min-Tsang Hsieh
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
- Chinese Medicinal Research and Development Center; China Medical University Hospital; Taiwan, R.O.C
- Natural Products Research Laboratories; UNC Eshelman School of Pharmacy; University of North Carolina; Chapel Hill, NC 27599 United States
| | - Kuo-Hsiung Lee
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
- Chinese Medicinal Research and Development Center; China Medical University Hospital; Taiwan, R.O.C
| | - Sheng-Chu Kuo
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
| | - Hui-Chang Lin
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
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18
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Cao ZY, Wang W, Liao K, Wang X, Zhou J, Ma J. Catalytic enantioselective synthesis of cyclopropanes featuring vicinal all-carbon quaternary stereocenters with a CH2F group; study of the influence of C–F⋯H–N interactions on reactivity. Org Chem Front 2018. [DOI: 10.1039/c8qo00842f] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A highly diastereo- and enantioselective synthesis of cyclopropanes with adjacent all-carbon quaternary stereocenters featuring a CH2F group is reported.
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Affiliation(s)
- Zhong-Yan Cao
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Wenmin Wang
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P R China
| | - Kui Liao
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
| | - Xiaoming Wang
- State Key Laboratory of Organometallic Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P R China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Process
- East China Normal University
- Shanghai 200062
- P. R. China
- State Key Laboratory of Organometallic Chemistry
| | - Jing Ma
- Institute of Theoretical and Computational Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
- P R China
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19
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Drouin M, Tremblay S, Paquin JF. Palladium-catalyzed synthesis of monofluoroalkenes from 3,3-difluoropropenes using dimethylmalonate and derivatives as nucleophiles. Org Biomol Chem 2017; 15:2376-2384. [PMID: 28244537 DOI: 10.1039/c7ob00376e] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
The synthesis of monofluoroalkenes bearing a malonate or its derivatives at the β position is presented. The reaction can be performed with various 3,3-difluoropropenes. A preliminary result for an enantioselective variant is also reported. Further synthetic transformations of a monofluoroalkene were also accomplished.
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Affiliation(s)
- Myriam Drouin
- CCVC, PROTEO, Département de chimie, 1045 avenue de la Médecine, Université Laval, Québec, Québec, CanadaG1V 0A6.
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20
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Liao FM, Cao ZY, Yu JS, Zhou J. Highly Stereoselective Gold-Catalyzed Coupling of Diazo Reagents and Fluorinated Enol Silyl Ethers to Tetrasubstituted Alkenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611625] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Fu-Min Liao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; East China Normal University; 3663N Zhongshan Road Shanghai 200062 China
| | - Zhong-Yan Cao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; East China Normal University; 3663N Zhongshan Road Shanghai 200062 China
| | - Jin-Sheng Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; East China Normal University; 3663N Zhongshan Road Shanghai 200062 China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes; East China Normal University; 3663N Zhongshan Road Shanghai 200062 China
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Shanghai 200032 China
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21
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Liao FM, Cao ZY, Yu JS, Zhou J. Highly Stereoselective Gold-Catalyzed Coupling of Diazo Reagents and Fluorinated Enol Silyl Ethers to Tetrasubstituted Alkenes. Angew Chem Int Ed Engl 2017; 56:2459-2463. [PMID: 28097773 DOI: 10.1002/anie.201611625] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Revised: 12/22/2016] [Indexed: 02/03/2023]
Abstract
We report a highly stereoselective synthesis of all-carbon or fluorinated tetrasubstituted alkenes from diazo reagents and fluorinated enol silyl ethers, using C-F bond as a synthetic handle. Cationic AuI catalysis plays a key role in this reaction. Remarkable fluorine effects on the reactivity and selectivity was also observed.
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Affiliation(s)
- Fu-Min Liao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663N Zhongshan Road, Shanghai, 200062, China
| | - Zhong-Yan Cao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663N Zhongshan Road, Shanghai, 200062, China
| | - Jin-Sheng Yu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663N Zhongshan Road, Shanghai, 200062, China
| | - Jian Zhou
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, East China Normal University, 3663N Zhongshan Road, Shanghai, 200062, China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai, 200032, China
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22
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Mallov I, Johnstone TC, Burns DC, Stephan DW. A model for C–F activation by electrophilic phosphonium cations. Chem Commun (Camb) 2017. [DOI: 10.1039/c7cc04057a] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The electrophilic phosphonium cation (EPC) salt [C10H6(CF3)PF(C6F5)2][B(C6F5)4] 4 exhibited structural and spectroscopic features evidencing an interaction between the CF3 and fluorophosphonium units. It thus models a key step in the proposed mechanism of main group C–F activation.
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Affiliation(s)
- Ian Mallov
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
| | | | - Darcy C. Burns
- Department of Chemistry
- University of Toronto
- Toronto
- Canada
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23
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Nishimine T, Taira H, Mori S, Matsubara O, Tokunaga E, Akiyama H, Soloshonok VA, Shibata N. Synthesis of chiral (tetrazolyl)methyl-containing acrylates via silicon-induced organocatalytic kinetic resolution of Morita–Baylis–Hillman fluorides. Chem Commun (Camb) 2017; 53:1128-1131. [DOI: 10.1039/c6cc08830a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
A new approach for the asymmetric installation of a (tetrazolyl)methyl group via Si/F activation using organocatalytic kinetic resolution of racemic MBH-fluorides.
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Affiliation(s)
- Takayuki Nishimine
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials
- Nagoya Institute of Technology
- Showa-ku
- Japan
| | - Hiromi Taira
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials
- Nagoya Institute of Technology
- Showa-ku
- Japan
| | - Satoru Mori
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials
- Nagoya Institute of Technology
- Showa-ku
- Japan
| | - Okiya Matsubara
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials
- Nagoya Institute of Technology
- Showa-ku
- Japan
| | - Etsuko Tokunaga
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials
- Nagoya Institute of Technology
- Showa-ku
- Japan
| | - Hidehiko Akiyama
- Faculty of Medical Technology
- Fujita Health University
- Kutsukake-cho
- Japan
| | - Vadim A. Soloshonok
- Department of Organic Chemistry I
- Faculty of Chemistry
- University of the Basque Country UPV/EHU
- Paseo Manuel Lardizábal 3
- 20018 San Sebastián
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences & Department of Frontier Materials
- Nagoya Institute of Technology
- Showa-ku
- Japan
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24
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