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Budnikov AS, Krylov IB, Lastovko AV, Dolotov RA, Shevchenko MI, Terent'ev AO. The diacetyliminoxyl radical in oxidative functionalization of alkenes. Org Biomol Chem 2023; 21:7758-7766. [PMID: 37698014 DOI: 10.1039/d3ob00925d] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/13/2023]
Abstract
The intermolecular oxime radical addition to CC bonds was observed and studied for the first time. The diacetyliminoxyl radical was proposed as a model radical reagent for the study of oxime radical reactivity towards unsaturated substrates, which is important in the light of the active development of synthetic applications of oxime radicals. In the present work it was found that the diacetyliminoxyl radical reacts with vinylarenes and conjugated dienes to give radical addition products, whereas unconjugated alkenes can undergo radical addition or allylic hydrogen substitution by diacetyliminoxyl depending on the substrate structure. Remarkably, substituted alkenes give high yields of C-O coupling products despite the significant steric hindrance, whereas unsubstituted alkenes give lower yields of the C-O coupling products. The observed atypical C-O coupling yield dependence on the alkene structure was explained by the discovered ability of the diacetyliminoxyl radical to attack alkenes with the formation of a C-N bond instead of a C-O bond giving side products. This side process is not expected for sterically hindered alkenes due to lower steric availability of the N-atom in diacetyliminoxyl than that of the O-atom.
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Affiliation(s)
- Alexander S Budnikov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.
| | - Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.
| | - Andrey V Lastovko
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.
| | - Roman A Dolotov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.
| | - Mikhail I Shevchenko
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., 119991 Moscow, Russian Federation.
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Budnikov AS, Krylov IB, Lastovko AV, Paveliev SA, Romanenko AR, Nikishin GI, Terent'ev AO. Stable and reactive diacetyliminoxyl radical in oxidative C-O coupling with β-dicarbonyl compounds and their complexes. Org Biomol Chem 2021; 19:7581-7586. [PMID: 34524335 DOI: 10.1039/d1ob01269j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
As a rule, reactive free radicals used in organic synthesis are too labile to be isolated, whereas persistent radicals are inert and find limited synthetic application. In the present study, the unusually stable diacetyliminoxyl radical was presented as a "golden mean" between transient and stable unreactive radicals. It was successfully employed as a reagent for oxidative C-O coupling with β-dicarbonyl compounds. Using this model radical the catalytic activity of acids, bases and transition metal ions in free-radical coupling was revealed.
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Affiliation(s)
- Alexander S Budnikov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation.
| | - Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation. .,D.I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya sq., Moscow 125047, Russian Federation
| | - Andrey V Lastovko
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation. .,M. V. Lomonosov Moscow State University, 1 Leninskie Gory, Moscow 119991, Russian Federation
| | - Stanislav A Paveliev
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation.
| | - Alexander R Romanenko
- D.I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya sq., Moscow 125047, Russian Federation
| | - Gennady I Nikishin
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation.
| | - Alexander O Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry of the Russian Academy of Sciences, 47 Leninsky prosp., Moscow 119991, Russian Federation. .,D.I. Mendeleev University of Chemical Technology of Russia, 9 Miusskaya sq., Moscow 125047, Russian Federation
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3
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Liu L, Li L, Wang X, Sun R, Zhou MD, Wang H. Mn(III)-Mediated Radical Cyclization of o-Alkenyl Aromatic Isocyanides with Boronic Acids: Access to N-Unprotected 2-Aryl-3-cyanoindoles. Org Lett 2021; 23:5826-5830. [PMID: 34323503 DOI: 10.1021/acs.orglett.1c01979] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The synthesis of N-unprotected 2-aryl-3-cyanoindoles was realized via the Mn(III)-mediated radical cascade cyclization of o-alkenyl aromatic isocyanides with boronic acids. A possible mechanism involving a sequential intermolecular radical addition, intramolecular cyclization, and cleavage of the C-C bond under mild reaction conditions is proposed. Mechanism studies show that H2O or O2 might provide the oxygen source for the elimination of benzaldehyde.
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Affiliation(s)
- Lu Liu
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Lei Li
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Xin Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Ran Sun
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - Ming-Dong Zhou
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
| | - He Wang
- School of Petrochemical Engineering, Liaoning Petrochemical University, Fushun 113001, P. R. China
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Kimberley L, Sheveleva AM, Li J, Carter JH, Kang X, Smith GL, Han X, Day SJ, Tang CC, Tuna F, McInnes EJL, Yang S, Schröder M. The Origin of Catalytic Benzylic C-H Oxidation over a Redox-Active Metal-Organic Framework. Angew Chem Int Ed Engl 2021; 60:15243-15247. [PMID: 33848040 PMCID: PMC8361671 DOI: 10.1002/anie.202102313] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 03/27/2021] [Indexed: 11/22/2022]
Abstract
Selective oxidation of benzylic C-H compounds to ketones is important for the production of a wide range of fine chemicals, and is often achieved using toxic or precious metal catalysts. Herein, we report the efficient oxidation of benzylic C-H groups in a broad range of substrates under mild conditions over a robust metal-organic framework material, MFM-170, incorporating redox-active [Cu2 II (O2 CR)4 ] paddlewheel nodes. A comprehensive investigation employing electron paramagnetic resonance (EPR) spectroscopy and synchrotron X-ray diffraction has identified the critical role of the paddlewheel moiety in activating the oxidant t BuOOH (tert-butyl hydroperoxide) via partial reduction to [CuII CuI (O2 CR)4 ] species.
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Affiliation(s)
- Louis Kimberley
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | | | - Jiangnan Li
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | - Joseph H. Carter
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
- Diamond Light SourceHarwell Science CampusOxfordshireOX11 0DEUK
| | - Xinchen Kang
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | - Gemma L. Smith
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | - Xue Han
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | - Sarah J. Day
- Diamond Light SourceHarwell Science CampusOxfordshireOX11 0DEUK
| | - Chiu C. Tang
- Diamond Light SourceHarwell Science CampusOxfordshireOX11 0DEUK
| | - Floriana Tuna
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
- Photon Science InstituteUniversity of ManchesterManchesterM13 9PLUK
| | - Eric J. L. McInnes
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
- Photon Science InstituteUniversity of ManchesterManchesterM13 9PLUK
| | - Sihai Yang
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
| | - Martin Schröder
- Department of ChemistryUniversity of ManchesterManchesterM13 9PLUK
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Kimberley L, Sheveleva AM, Li J, Carter JH, Kang X, Smith GL, Han X, Day SJ, Tang CC, Tuna F, McInnes EJL, Yang S, Schröder M. The Origin of Catalytic Benzylic C−H Oxidation over a Redox‐Active Metal–Organic Framework. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102313] [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)
- Louis Kimberley
- Department of Chemistry University of Manchester Manchester M13 9PL UK
| | | | - Jiangnan Li
- Department of Chemistry University of Manchester Manchester M13 9PL UK
| | - Joseph H. Carter
- Department of Chemistry University of Manchester Manchester M13 9PL UK
- Diamond Light Source Harwell Science Campus Oxfordshire OX11 0DE UK
| | - Xinchen Kang
- Department of Chemistry University of Manchester Manchester M13 9PL UK
| | - Gemma L. Smith
- Department of Chemistry University of Manchester Manchester M13 9PL UK
| | - Xue Han
- Department of Chemistry University of Manchester Manchester M13 9PL UK
| | - Sarah J. Day
- Diamond Light Source Harwell Science Campus Oxfordshire OX11 0DE UK
| | - Chiu C. Tang
- Diamond Light Source Harwell Science Campus Oxfordshire OX11 0DE UK
| | - Floriana Tuna
- Department of Chemistry University of Manchester Manchester M13 9PL UK
- Photon Science Institute University of Manchester Manchester M13 9PL UK
| | - Eric J. L. McInnes
- Department of Chemistry University of Manchester Manchester M13 9PL UK
- Photon Science Institute University of Manchester Manchester M13 9PL UK
| | - Sihai Yang
- Department of Chemistry University of Manchester Manchester M13 9PL UK
| | - Martin Schröder
- Department of Chemistry University of Manchester Manchester M13 9PL UK
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Krylov IB, Segida OO, Budnikov AS, Terent'ev AO. Oxime‐Derived Iminyl Radicals in Selective Processes of Hydrogen Atom Transfer and Addition to Carbon‐Carbon π‐Bonds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100058] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Igor B. Krylov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Oleg O. Segida
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Alexander S. Budnikov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
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7
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Krylov IB, Paveliev SA, Budnikov AS, Terent’ev AO. Oxime radicals: generation, properties and application in organic synthesis. Beilstein J Org Chem 2020; 16:1234-1276. [PMID: 32550935 PMCID: PMC7277713 DOI: 10.3762/bjoc.16.107] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/15/2020] [Indexed: 12/16/2022] Open
Abstract
N-Oxyl radicals (compounds with an N-O• fragment) represent one of the richest families of stable and persistent organic radicals with applications ranging from catalysis of selective oxidation processes and mechanistic studies to production of polymers, energy storage, magnetic materials design and spectroscopic studies of biological objects. Compared to other N-oxyl radicals, oxime radicals (or iminoxyl radicals) have been underestimated for a long time as useful intermediates for organic synthesis, despite the fact that their precursors, oximes, are extremely widespread and easily available organic compounds. Furthermore, oxime radicals are structurally exceptional. In these radicals, the N-O• fragment is connected to an organic moiety by a double bond, whereas all other classes of N-oxyl radicals contain an R2N-O• fragment with two single C-N bonds. Although oxime radicals have been known since 1964, their broad synthetic potential was not recognized until the last decade, when numerous selective reactions of oxidative cyclization, functionalization, and coupling mediated by iminoxyl radicals were discovered. This review is focused on the synthetic methods based on iminoxyl radicals developed in the last ten years and also contains some selected data on previous works regarding generation, structure, stability, and spectral properties of these N-oxyl radicals. The reactions of oxime radicals are classified into intermolecular (oxidation by oxime radicals, oxidative C-O coupling) and intramolecular. The majority of works are devoted to intramolecular reactions of oxime radicals. These reactions are classified into cyclizations involving C-H bond cleavage and cyclizations involving a double C=C bond cleavage.
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Affiliation(s)
- Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Stanislav A Paveliev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander S Budnikov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander O Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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8
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Wójcik G, Wieszczycka K, Aksamitowski P, Zembrzuska J. Elimination of carcinogenic chromium(VI) by reduction at two-phase system. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.116410] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Han Z, Shen S, Zheng F, Hu H, Zhang J, Zhu S. Copper-catalyzed synthesis of oxime ethers from iminoxy radical (C N–O ) and maleimides via radical addition. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.151188] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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10
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One-pot synthesis of 2-amino-3,4-dicyanopyridines from ketoximes and tetracyanoethylene via Cu(I)-catalyzed cyclization. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.02.032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Moaddeli A, Rousta M, Shekouhy M, Khalili D, Samadi M, Khalafi-Nezhad A. Nanostructured Mesoporous Zinc-Incorporated Copper Oxide (NMZI-CuO): An Efficient and Reusable Nanocatalyst for the Synthesis of Esters through C−H Functionalization. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201800648] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Ali Moaddeli
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz 71454 Iran
- Legal Medicine Research Center, Legal Medicine Organization; Tehran Iran
| | - Marzieh Rousta
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz 71454 Iran
| | - Mohsen Shekouhy
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz 71454 Iran
| | - Dariush Khalili
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz 71454 Iran
| | - Mohammad Samadi
- Laboratoire de Chimie et Physique Approche Multi-échelle de Milieux Complexes (LCP-A2MC), ICPM, Département de Chimie; Université de Lorraine, 1; Bd Arago, Metz-Technopôle 57078 Metz France
| | - Ali Khalafi-Nezhad
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz 71454 Iran
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