1
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Wang L, Qin W. Copper-Initiated Regiodivergent Chloropentafluorosulfanylation of 1,3-Enynes under Substrate Control. Org Lett 2024; 26:5049-5054. [PMID: 38833632 DOI: 10.1021/acs.orglett.4c01768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
A copper-catalyzed regiodivergent chloropentafluorosulfanylation strategy for 1,3-enynes using SF5Cl has been developed. The regioselectivity is dictated by the structural and substitution patterns of 1,3-enynes, enabling facile access to three classes of SF5-containing products: propargylic chlorides, 1,3-dienes, and allenes. The reaction systems involve radical species, where the transfer of a chlorine atom from SF5Cl to a carbon radical is considered the predominant pathway. Diverse types of SF5- building blocks can be synthesized through simple functional group transformations.
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Affiliation(s)
- Lin Wang
- Institute of Frontier Chemistry School of Chemistry and Chemical Engineering, Shandong University, Qingdao 266237, P. R. China
| | - Wenhui Qin
- Institute of Frontier Chemistry School of Chemistry and Chemical Engineering, Shandong University, Qingdao 266237, P. R. China
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2
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Kraemer Y, Buldt JA, Kong WY, Stephens AM, Ragan AN, Park S, Haidar ZC, Patel AH, Shey R, Dagan R, McLoughlin CP, Fettinger JC, Tantillo DJ, Pitts CR. Overcoming a Radical Polarity Mismatch in Strain-Release Pentafluorosulfanylation of [1.1.0]Bicyclobutanes: An Entryway to Sulfone- and Carbonyl-Containing SF 5-Cyclobutanes. Angew Chem Int Ed Engl 2024; 63:e202319930. [PMID: 38237059 PMCID: PMC11045327 DOI: 10.1002/anie.202319930] [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: 12/23/2023] [Indexed: 04/26/2024]
Abstract
The first assortment of achiral pentafluorosulfanylated cyclobutanes (SF5-CBs) are now synthetically accessible through strain-release functionalization of [1.1.0]bicyclobutanes (BCBs) using SF5Cl. Methods for both chloropentafluorosulfanylation and hydropentafluorosulfanylation of sulfone-based BCBs are detailed herein, as well as proof-of-concept that the logic extends to tetrafluoro(aryl)sulfanylation, tetrafluoro(trifluoromethyl)sulfanylation, and three-component pentafluorosulfanylation reactions. The methods presented enable isolation of both syn and anti isomers of SF5-CBs, but we also demonstrate that this innate selectivity can be overridden in chloropentafluorosulfanylation; that is, an anti-stereoselective variant of SF5Cl addition across sulfone-based BCBs can be achieved by using inexpensive copper salt additives. Considering the SF5 group and CBs have been employed individually as nonclassical bioisosteres, structural aspects of these unique SF5-CB "hybrid isosteres" were then contextualized using SC-XRD. From a mechanistic standpoint, chloropentafluorosulfanylation ostensibly proceeds through a curious polarity mismatch addition of electrophilic SF5 radicals to the electrophilic sites of the BCBs. Upon examining carbonyl-containing BCBs, we also observed rare instances whereby radical addition to the 1-position of a BCB occurs. The nature of the key C(sp3)-SF5 bond formation step - among other mechanistic features of the methods we disclose - was investigated experimentally and with DFT calculations. Lastly, we demonstrate compatibility of SF5-CBs with various downstream functionalizations.
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Affiliation(s)
- Yannick Kraemer
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Jón Atiba Buldt
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Wang-Yeuk Kong
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Alexander M Stephens
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Abbey N Ragan
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Soojun Park
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Zane C Haidar
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Ansh Hiten Patel
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Rachel Shey
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Roee Dagan
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Connor P McLoughlin
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - James C Fettinger
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Dean J Tantillo
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
| | - Cody Ross Pitts
- Department of Chemistry, University of California, 1 Shields Avenue, Davis, CA 95616, USA
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3
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Kucher H, Wenzel JO, Rombach D. Hydrothiolation of Triisopropylsilyl Acetylene Sulfur Pentafluoride - Charting the Chemical Space of β-SF 5 Vinyl Sulfides. Chempluschem 2024:e202400168. [PMID: 38691830 DOI: 10.1002/cplu.202400168] [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: 04/05/2024] [Revised: 04/30/2024] [Accepted: 04/30/2024] [Indexed: 05/03/2024]
Abstract
Recently, we suggested liquid and high-boiling TIPS-CC-SF5 (TASP) as a versatile reagent to access so far elusive SF5-containing building blocks by less specialized laboratories under bench-top conditions. The synthesis of non-aromatic SF5 building blocks generally requires on-site fluorination or pentafluorosulfanylation steps employing toxic and/or gaseous reagents. Herein, we underline the versatility of this reagent by reporting a benign bench-top protocol for the synthesis of Z-configured β-pentafluorosulfanylated vinyl sulfides in good to excellent yields (up to 99 %) with exclusive (Z)-diasteroselectivity and broad functional group tolerance. This method exploits an in-situ protodesilylation-hydrothiolation sequence. This so far uncharted class of compounds was characterized by means of NMR-spectroscopy as well as SC-XRD. Furthermore, we suggest the reaction to proceed via a kinetically controlled closed-shell reaction pathway, corroborated by in-silico experiments.
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Affiliation(s)
- Hannes Kucher
- Department of Chemistry and Applied Biosciences Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
| | - Jonas O Wenzel
- Department of Chemistry and Applied Biosciences Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
| | - David Rombach
- Department of Chemistry and Applied Biosciences Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
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4
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Wenzel JO, Jester F, Togni A, Rombach D. Hydroamination of Triisopropylsilyl Acetylene Sulfur Pentafluoride - a Bench-top Route to Pentafluorosulfanylated Enamines. Chemistry 2024; 30:e202304015. [PMID: 38079230 DOI: 10.1002/chem.202304015] [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: 12/01/2023] [Indexed: 01/17/2024]
Abstract
Synthetic access to a variety of aliphatic and vinylic pentafluorosulfanylated building blocks remains a major challenge in contemporary organofluorine chemistry hampering its investigation in the context of medicinal chemistry, agrochemistry and functional materials. Herein, we report a bench-top protocol to access the virtually unknown class of α-SF5 -enamines under mild reaction conditions in good to excellent yields (up to 95 %). This reaction combines the protodesilylation of the commercially available precursor TASP with the in situ hydroamination of HC≡C-SF5 . The on-site use of highly toxic gases or corrosive reagents is avoided, making access to this motif applicable to a wide chemical audience. The excellent E-diastereoselectivity of this two-step cascade reaction is suggested to be the result of the convergence of the fast Z-/E- isomerization of a vinyl anion as well as the isomerization of the iminium ion. The remarkable thermal stability of these SF5 -enamines encourages further studies of their synthetic utility.
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Affiliation(s)
- Jonas O Wenzel
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
| | - Fabian Jester
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
| | - Antonio Togni
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
| | - David Rombach
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 2, CH-8093, Zürich, Switzerland
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5
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Popek L, Cihan M, Blanchard N, Bizet V. Palladium-Catalyzed Regioselective Synthesis of 2-SF 5 -Indenols and Further Derivatizations. Angew Chem Int Ed Engl 2024; 63:e202315909. [PMID: 38116823 DOI: 10.1002/anie.202315909] [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: 10/20/2023] [Revised: 12/14/2023] [Accepted: 12/18/2023] [Indexed: 12/21/2023]
Abstract
A palladium-catalyzed synthesis of 2-SF5 -indenols has been developed by reacting commercially available boronic acid derivatives and readily accessible SF5 -alkynes. The present methodology is fully regioselective thanks to the intrinsic polarization of SF5 -alkynes. A selection of downstream functionalizations has been performed to highlight the versatility of 2-SF5 -indenols and indenones as platforms for the design of more complex SF5 -containing molecules.
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Affiliation(s)
- Lucas Popek
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000, Mulhouse, France
| | - Murat Cihan
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000, Mulhouse, France
| | - Nicolas Blanchard
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000, Mulhouse, France
| | - Vincent Bizet
- Université de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000, Mulhouse, France
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6
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Lepori M, Schmid S, Barham JP. Photoredox catalysis harvesting multiple photon or electrochemical energies. Beilstein J Org Chem 2023; 19:1055-1145. [PMID: 37533877 PMCID: PMC10390843 DOI: 10.3762/bjoc.19.81] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 07/07/2023] [Indexed: 08/04/2023] Open
Abstract
Photoredox catalysis (PRC) is a cutting-edge frontier for single electron-transfer (SET) reactions, enabling the generation of reactive intermediates for both oxidative and reductive processes via photon activation of a catalyst. Although this represents a significant step towards chemoselective and, more generally, sustainable chemistry, its efficacy is limited by the energy of visible light photons. Nowadays, excellent alternative conditions are available to overcome these limitations, harvesting two different but correlated concepts: the use of multi-photon processes such as consecutive photoinduced electron transfer (conPET) and the combination of photo- and electrochemistry in synthetic photoelectrochemistry (PEC). Herein, we review the most recent contributions to these fields in both oxidative and reductive activations of organic functional groups. New opportunities for organic chemists are captured, such as selective reactions employing super-oxidants and super-reductants to engage unactivated chemical feedstocks, and scalability up to gram scales in continuous flow. This review provides comparisons between the two techniques (multi-photon photoredox catalysis and PEC) to help the reader to fully understand their similarities, differences and potential applications and to therefore choose which method is the most appropriate for a given reaction, scale and purpose of a project.
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Affiliation(s)
- Mattia Lepori
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitatsstraße 31, 93040 Regensburg, Germany
| | - Simon Schmid
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitatsstraße 31, 93040 Regensburg, Germany
| | - Joshua P Barham
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitatsstraße 31, 93040 Regensburg, Germany
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7
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Chemistry of Pentafluorosulfanyl Derivatives and Related Analogs: From Synthesis to Applications. Chemistry 2022; 28:e202201491. [DOI: 10.1002/chem.202201491] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Indexed: 12/23/2022]
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8
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Taponard A, Jarrosson T, Khrouz L, Médebielle M, Broggi J, Tlili A. Metal-Free SF 6 Activation: A New SF 5 -Based Reagent Enables Deoxyfluorination and Pentafluorosulfanylation Reactions. Angew Chem Int Ed Engl 2022; 61:e202204623. [PMID: 35471641 DOI: 10.1002/anie.202204623] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Indexed: 12/13/2022]
Abstract
The activation of SF6 , a potent greenhouse gas, under metal-free and visible light conditions is reported. Herein, mechanistic investigations including EPR spectroscopy, NMR studies and cyclic voltammetry allowed the rational design of a new fluorinating reagent which was synthesized from the 2-electron activation of SF6 with commercially available TDAE. This new SF5 -based reagent was efficiently employed for the deoxyfluorination of CO2 and the fluorinative desulfurization of CS2 allowing the formation of useful fluorinated amines. Moreover, for the first time we demonstrated that our SF5 -based reagent could afford the mild generation of Cl-SF5 gas. This finding was exploited for the chloro-pentafluorosulfanylation of alkynes and alkenes.
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Affiliation(s)
- Alexis Taponard
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246), Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA, 43 Bd du 11 Novembre 1918, 69622, Villeurbanne, France
| | - Tristan Jarrosson
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246), Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA, 43 Bd du 11 Novembre 1918, 69622, Villeurbanne, France
| | - Lhoussain Khrouz
- ENSL, CNRS, Laboratoire de Chimie UMR 5182, 46 allée d'Italie, 69364, Lyon, France
| | - Maurice Médebielle
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246), Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA, 43 Bd du 11 Novembre 1918, 69622, Villeurbanne, France
| | - Julie Broggi
- Aix Marseille Univ, CNRS, Institut de Chimie Radicalaire (ICR)ICR UMR 7273, Faculty of Pharmacy, 27 Bd Jean Moulin, 13385, Marseille, France
| | - Anis Tlili
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246), Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA, 43 Bd du 11 Novembre 1918, 69622, Villeurbanne, France
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9
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Sani M, Zanda M. Recent Advances in the Synthesis and Medicinal Chemistry of SF5 and SF4Cl Compounds. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1845-9291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractThis short review covers the most important advances published in the literature during the last five years, concerning the synthesis, chemical modifications, and applications of SF5 and SF4Cl compounds in medicinal/bioorganic chemistry and materials science.1 Introduction2 Methods for Incorporation/Manipulation of SF4Cl/SF5 Groups2.1 Nonaromatic SF5 Compounds via Direct Pentafluorosulfanylation of Alkenes and Alkynes2.2 SF4Cl- and SF5-Aryl/Heteroaryl Derivatives3 Synthesis of SF5/SF4Cl/SF4-Substituted Small Molecules3.1 Heterocycles3.2 Amines and Amino Acids3.3 α-SF5 ketones3.4 Miscellaneous Alkyl-, Alkenyl-, and Aryl-SF5 Compounds4 Medicinal/Biological Applications4.1 Anticancer Compounds4.2 Antibacterial and Antiparasitic Compounds4.3 Central Nervous System4.4 Miscellaneous Biological Activity5 Materials Science Applications6 Conclusion
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10
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Magre M, Ni S, Cornella J. (Hetero)aryl-S VI Fluorides: Synthetic Development and Opportunities. Angew Chem Int Ed Engl 2022; 61:e202200904. [PMID: 35303387 PMCID: PMC9322316 DOI: 10.1002/anie.202200904] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Indexed: 12/12/2022]
Abstract
(Hetero)arylsulfur compounds where the S atom is in the oxidation state VI represent a large percentage of the molecular functionalities present in organic chemistry. More specifically, (hetero)aryl‐SVI fluorides have recently received enormous attention because of their potential as chemical biology probes, as a result of their reactivity in a simple, modular, and efficient manner. Whereas the synthesis and application of the level 1 fluorination at SVI atoms (sulfonyl and sulfonimidoyl fluorides) have been widely studied and reviewed, the synthetic strategies towards higher levels of fluorination (levels 2 to 5) are somewhat more limited. This Minireview evaluates and summarizes the progress in the synthesis of highly fluorinated aryl‐SVI compounds at all levels, discussing synthetic strategies, reactivity, the advantages and disadvantages of the synthetic procedures, the proposed mechanisms, and the potential upcoming opportunities.
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Affiliation(s)
- Marc Magre
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Shengyang Ni
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Josep Cornella
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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11
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Corbin DA, Cremer C, Newell BS, Patureau FW, Miyake G, Puffer KO. Effects of the Chalcogenide Identity in N‐Aryl Phenochalcogenazine Photoredox Catalysts. ChemCatChem 2022; 14:e202200485. [PMID: 36245968 PMCID: PMC9541587 DOI: 10.1002/cctc.202200485] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 06/06/2022] [Indexed: 11/06/2022]
Abstract
Phenochalcogenazines such as phenoxazines and phenothiazines have been widely employed as photoredox catalysts (PCs) in small molecule and polymer synthesis. However, the effect of the chalcogenide in these catalysts has not been fully investigated. In this work, a series of four phenochalcogenazines is synthesized to understand how the chalcogenide impacts catalyst properties and performance. Increasing the size of the chalcogenide is found to distort the PC structure, ultimately impacting the properties of each PC. For example, larger chalcogenides destabilize the PC radical cation, possibly resulting in catalyst degradation. In addition, PCs with larger chalcogenides experience increased reorganization during electron transfer, leading to slower electron transfer. Ultimately, catalyst performance is evaluated in organocatalyzed atom transfer radical polymerization and a photooxidation reaction for C(sp2)−N coupling. Results from these experiments highlight that a balance of PC properties is most beneficial for catalysis, including a long‐lived excited state, a stable radical cation, and a low reorganization energy.
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Affiliation(s)
| | - Christopher Cremer
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Institute of Organic Chemistry GERMANY
| | - Brian S. Newell
- Colorado State University Analytical Resources Core UNITED STATES
| | - Frederic W. Patureau
- RWTH Aachen University: Rheinisch-Westfalische Technische Hochschule Aachen Instit GERMANY
| | - Garret Miyake
- Colorado State University Chemistry and Biochemistry 301 W. Pitkin Street215 UCB80523United States 80523 Fort Collins UNITED STATES
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12
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Taponard A, Jarrosson T, Khrouz L, Médebielle M, Broggi J, Tlili A. Metal‐Free SF
6
Activation: A New SF
5
‐Based Reagent Enables Deoxyfluorination and Pentafluorosulfanylation Reactions. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204623] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Alexis Taponard
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246) Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA 43 Bd du 11 Novembre 1918 69622 Villeurbanne France
| | - Tristan Jarrosson
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246) Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA 43 Bd du 11 Novembre 1918 69622 Villeurbanne France
| | - Lhoussain Khrouz
- ENSL, CNRS, Laboratoire de Chimie UMR 5182 46 allée d'Italie 69364 Lyon France
| | - Maurice Médebielle
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246) Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA 43 Bd du 11 Novembre 1918 69622 Villeurbanne France
| | - Julie Broggi
- Aix Marseille Univ, CNRS Institut de Chimie Radicalaire (ICR)ICR UMR 7273 Faculty of Pharmacy 27 Bd Jean Moulin 13385 Marseille France
| | - Anis Tlili
- Institute of Chemistry and Biochemistry (ICBMS-UMR CNRS 5246) Univ Lyon, Université Lyon 1, CNRS, CPE-Lyon, INSA 43 Bd du 11 Novembre 1918 69622 Villeurbanne France
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13
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Markushyna Y, Savateev A. Light as a tool in organic photocatalysis: multi‐photon excitation and chromoselective reactions. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yevheniia Markushyna
- Max Planck Institute of Colloids and Interfaces: Max-Planck-Institut fur Kolloid und Grenzflachenforschung Department of Colloid Chemistry Am Mühlenberg 1 14476 Potsdam GERMANY
| | - Aleksandr Savateev
- Max Planck Institute of Colloids and Interfaces: Max-Planck-Institut fur Kolloid und Grenzflachenforschung Department of Colloid Chemistry GERMANY
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14
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Kim S, Nagorny P. Electrochemical Synthesis of Glycosyl Fluorides Using Sulfur(VI) Hexafluoride as the Fluorinating Agent. Org Lett 2022; 24:2294-2298. [PMID: 35298181 PMCID: PMC10543653 DOI: 10.1021/acs.orglett.2c00431] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This manuscript describes the electrochemical synthesis of 17 different glycosyl fluorides in 73-98% yields on up to a 5 g scale that relies on the use of SF6 as an inexpensive and safe fluorinating agent. Cyclic voltammetry and related mechanistic studies carried out subsequently suggest that the active fluorinating species generated through the cathodic reduction of SF6 are transient under these reductive conditions and that the sulfur and fluoride byproducts are effectively scavenged by Zn(II) to generate benign salts.
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Affiliation(s)
- Sungjin Kim
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
| | - Pavel Nagorny
- Department of Chemistry, University of Michigan, Ann Arbor, Michigan 48109, United States
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15
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Magre M, Ni S, Cornella J. (Hetero)aryl‒S(VI) Fluorides: Synthetic Development and Opportunities. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200904] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marc Magre
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry Kaiser-Wilhelm-Platz 1Muelheim an der Ruhr 45470 Muelheim an der Ruhr GERMANY
| | - Shengyang Ni
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Organometallic Chemistry Kaiser-Wilhelm-Platz 1Muelheim an der Ruhr 45470 Muelheim an der Ruhr GERMANY
| | - Josep Cornella
- Max-Planck-Institut für Kohlenforschung Organometallic Chemistry Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr GERMANY
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16
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Birepinte M, Champagne PA, Paquin J. Photoinitiated
anti
‐Hydropentafluorosulfanylation of Terminal Alkynes. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Mélodie Birepinte
- CCVC, PROTEO Département de chimie Université Laval 1045 avenue de la Médecine Québec G1V 0A6 Canada
| | - Pier Alexandre Champagne
- Department of Chemistry and Environmental Science New Jersey Institute of Technology Newark NJ 07102 USA
| | - Jean‐François Paquin
- CCVC, PROTEO Département de chimie Université Laval 1045 avenue de la Médecine Québec G1V 0A6 Canada
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17
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Haufe G. Synthesis and application of pentafluorosulfanylation reagents and derived aliphatic SF5-containing building blocks. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132656] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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18
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Birepinte M, Champagne PA, Paquin JF. Photoinitiated anti-Hydropentafluorosulfanylation of Terminal Alkynes. Angew Chem Int Ed Engl 2021; 61:e202112575. [PMID: 34716642 DOI: 10.1002/anie.202112575] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/19/2021] [Indexed: 11/10/2022]
Abstract
A photoinitiated anti-hydropentafluorosulfanylation of terminal alkynes using SF5 Cl and (TMS)3 SiH as the hydrogen atom donor is reported. This transformation generates selectively (Z)-(1-alken-1-yl)pentafluoro-λ6 -sulfanes (Z:E : >85:15), thus allowing the preparation of this previously unknown geometrical isomer. DFT calculations highlight that the selectivity is due to the intrinsic preference of SF5 -substituted vinylic radicals to adopt a cis geometry, and to increased steric contacts during the transition structures leading to the minor (E)-products.
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Affiliation(s)
- Mélodie Birepinte
- CCVC, PROTEO, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, G1V 0A6, Canada
| | - Pier Alexandre Champagne
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, 07102, USA
| | - Jean-François Paquin
- CCVC, PROTEO, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, G1V 0A6, Canada
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19
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Lefebvre G, Charron O, Cossy J, Meyer C. Radical Addition of SF 5Cl to Cyclopropenes: Synthesis of (Pentafluorosulfanyl)cyclopropanes. Org Lett 2021; 23:5491-5495. [PMID: 34170712 DOI: 10.1021/acs.orglett.1c01840] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
With the goal of accessing yet unknown SF5-cyclopropyl building blocks, the radical addition of SF5Cl to cyclopropenes was investigated. Addition of the SF5 radical occurs regioselectively at the less substituted carbon of cyclopropenes and trans to the most hindered substituent at C3, while chlorine atom transfer proceeds with moderate to high levels of diastereocontrol. The carbon-chlorine bond in the resulting adducts can undergo subsequent radical reduction or be involved in a radical cyclization.
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Affiliation(s)
- Gauthier Lefebvre
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris-PSL, CNRS, 10 rue Vauquelin, 75005 Paris, France
| | - Olivier Charron
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris-PSL, CNRS, 10 rue Vauquelin, 75005 Paris, France
| | - Janine Cossy
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris-PSL, CNRS, 10 rue Vauquelin, 75005 Paris, France
| | - Christophe Meyer
- Molecular, Macromolecular Chemistry, and Materials, ESPCI Paris-PSL, CNRS, 10 rue Vauquelin, 75005 Paris, France
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20
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Debrauwer V, Leito I, Lõkov M, Tshepelevitsh S, Parmentier M, Blanchard N, Bizet V. Synthesis and Physicochemical Properties of 2-SF 5-(Aza)Indoles, a New Family of SF 5 Heterocycles. ACS ORGANIC & INORGANIC AU 2021; 1:43-50. [PMID: 36855754 PMCID: PMC9954346 DOI: 10.1021/acsorginorgau.1c00010] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Structural diversity in heterocyclic chemistry is key to unlocking new properties and modes of action. In this regard, heterocycles embedding emerging fluorinated substituents hold great promise. Herein is described a strategy to access 2-SF5-(aza)indoles for the first time. The sequence relies on the radical addition of SF5Cl to the alkynyl π-system of 2-ethynyl anilines followed by a cyclization reaction. A telescoped sequence is proposed, making this strategy very appealing and reproducible on a gram scale. Downstream functionalizations are also demonstrated, allowing an easy diversification of N- and C3-positions. Ames test, pK a, log P, and differential scanning calorimetry measurements of several fluorinated 2-Rf-indoles are also disclosed. These studies highlight the strategic advantages that a C2-pentafluorosulfanylated motif impart to a privileged scaffold such as an indole.
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Affiliation(s)
- Vincent Debrauwer
- Université
de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France
| | - Ivo Leito
- Institute
of Chemistry, University of Tartu, Tartu 50411, Estonia
| | - Märt Lõkov
- Institute
of Chemistry, University of Tartu, Tartu 50411, Estonia
| | | | - Michael Parmentier
- Chemical
and Analytical Development, Novartis Pharma
AG, CH-4056 Basel, Switzerland
| | - Nicolas Blanchard
- Université
de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France,
| | - Vincent Bizet
- Université
de Haute-Alsace, Université de Strasbourg, CNRS, LIMA, UMR 7042, 68000 Mulhouse, France,
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21
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Rombach D, Birenheide B, Wagenknecht H. Photoredox Catalytic Pentafluorosulfanylative Domino Cyclization of α-Substituted Alkenes to Oxaheterocycles by Using SF 6. Chemistry 2021; 27:8088-8093. [PMID: 33831262 PMCID: PMC8252034 DOI: 10.1002/chem.202100767] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Indexed: 01/14/2023]
Abstract
Virtually inert sulfur hexafluoride becomes a precious pentafluorosulfanylation agent, if properly activated by photoredox catalysis, to access α-fluoro and α-alkoxy SF5 -compounds. This advanced protocol converts SF6 in the presence of alkynols as bifunctional C-C- and C-O-bond forming reagents directly into pentafluorosulfanylated oxygen-containing heterocycles in a single step from α-substituted alkenes. The proposed mechanism is supported by theoretical calculations and gives insights not only in the pentafluorosulfanylation step but also into formation of the carbon-carbon bond and is in full agreement with Baldwin's cyclization rules. The key step is a radical type 5-, 6- respectively 7-exo-dig-cyclization. The synthesized oxaheterocycles cannot be simply prepared by other synthetic methods, show a high level of structural complexity and significantly expand the scope of pentafluorosulfanylated building blocks valuable for medicinal and material chemistry.
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Affiliation(s)
- David Rombach
- Laboratory of Inorganic ChemistrySwiss Federal Institute of Technology (ETH)Vladimir-Prelog-Weg 1–5/108093ZürichSwitzerland
| | - Bernhard Birenheide
- Institute of Inorganic ChemistryKalsruhe Institute of Technology (KIT)Engesserstr. 1576131KarlsruheGermany
| | - Hans‐Achim Wagenknecht
- Institute of Organic ChemistryKarlsruhe Institute of Technology (KIT)Fritz-Haber-Weg 676131KarlsruheGermany
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