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Püschel D, Hédé S, Maisuls I, Höfert SP, Woschko D, Kühnemuth R, Felekyan S, Seidel CAM, Czekelius C, Weingart O, Strassert CA, Janiak C. Enhanced Solid-State Fluorescence of Flavin Derivatives by Incorporation in the Metal-Organic Frameworks MIL-53(Al) and MOF-5. Molecules 2023; 28:molecules28062877. [PMID: 36985849 PMCID: PMC10055669 DOI: 10.3390/molecules28062877] [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: 01/25/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
The flavin derivatives 10-methyl-isoalloxazine (MIA) and 6-fluoro-10-methyl-isoalloxazine (6F-MIA) were incorporated in two alternative metal-organic frameworks, (MOFs) MIL-53(Al) and MOF-5. We used a post-synthetic, diffusion-based incorporation into microcrystalline MIL-53 powders with one-dimensional (1D) pores and an in-situ approach during the synthesis of MOF-5 with its 3D channel network. The maximum amount of flavin dye incorporation is 3.9 wt% for MIA@MIL-53(Al) and 1.5 wt% for 6F-MIA@MIL-53(Al), 0.85 wt% for MIA@MOF-5 and 5.2 wt% for 6F-MIA@MOF-5. For the high incorporation yields the probability to have more than one dye molecule in a pore volume is significant. As compared to the flavins in solution, the fluorescence spectrum of these flavin@MOF composites is broadened at the bathocromic side especially for MIA. Time-resolved spectroscopy showed that multi-exponential fluorescence lifetimes were needed to describe the decays. The fluorescence-weighted lifetime of flavin@MOF of 4 ± 1 ns also corresponds to those in solution but is significantly prolonged compared to the solid flavin dyes with less than 1 ns, thereby confirming the concept of "solid solutions" for dye@MOF composites. The fluorescence quantum yield (ΦF) of the flavin@MOF composites is about half of the solution but is significantly higher compared to the solid flavin dyes. Both the fluorescence lifetime and quantum yield of flavin@MOF decrease with the flavin loading in MIL-53 due to the formation of various J-aggregates. Theoretical calculations using plane-wave and QM/MM methods are in good correspondence with the experimental results and explain the electronic structures as well as the photophysical properties of crystalline MIA and the flavin@MOF composites. In the solid flavins, π-stacking interactions of the molecules lead to a charge transfer state with low oscillator strength resulting in aggregation-caused quenching (ACQ) with low lifetimes and quantum yields. In the MOF pores, single flavin molecules represent a major population and the computed MIA@MOF structures do not find π-stacking interactions with the pore walls but only weak van-der-Waals contacts which reasons the enhanced fluorescence lifetime and quantum yield of the flavins in the composites compared to their neat solid state. To analyze the orientation of flavins in MOFs, we measured fluorescence anisotropy images of single flavin@MOF-5 crystals and a static ensemble flavin@MIL53 microcrystals, respectively. Based on image information, anisotropy distributions and overall curve of the time-resolved anisotropy curves combined with theoretical calculations, we can prove that all fluorescent flavins species have a defined and rather homogeneous orientation in the MOF framework. In MIL-53, the transition dipole moments of flavins are orientated along the 1D channel axis, whereas in MOF-5 we resolved an average orientation that is tilted with respect to the cubic crystal lattice. Notably, the more hydrophobic 6F-MIA exhibits a higher degree order than MIA. The flexible MOF MIL-53(Al) was optimized essentially to the experimental large-pore form in the guest-free state with QuantumEspresso (QE) and with MIA molecules in the pores the structure contracted to close to the experimental narrow-pore form which was also confirmed by PXRD. In summary, the incorporation of flavins in MOFs yields solid-state materials with enhanced rigidity, stabilized conformation, defined orientation and reduced aggregations of the flavins, leading to increased fluorescence lifetime and quantum yield as controllable photo-luminescent and photo-physical properties.
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Affiliation(s)
- Dietrich Püschel
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Simon Hédé
- Institut für Theoretische Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Iván Maisuls
- Institut für Anorganische und Analytische Chemie, CeNTech, CiMIC, SoN, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, D-48149 Münster, Germany
| | - Simon-Patrick Höfert
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Dennis Woschko
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Ralf Kühnemuth
- Institut für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Suren Felekyan
- Institut für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Claus A M Seidel
- Institut für Physikalische Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Constantin Czekelius
- Institut für Organische Chemie und Makromolekulare Chemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Oliver Weingart
- Institut für Theoretische Chemie und Computerchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
| | - Cristian A Strassert
- Institut für Anorganische und Analytische Chemie, CeNTech, CiMIC, SoN, Westfälische Wilhelms-Universität Münster, Heisenbergstraße 11, D-48149 Münster, Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstraße 1, D-40225 Düsseldorf, Germany
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2
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Čubiňák M, Varma N, Oeser P, Pokluda A, Pavlovska T, Cibulka R, Sikorski M, Tobrman T. Tuning the Photophysical Properties of Flavins by Attaching an Aryl Moiety via Direct C-C Bond Coupling. J Org Chem 2023; 88:218-229. [PMID: 36525315 DOI: 10.1021/acs.joc.2c02168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Palladium-catalyzed Suzuki reactions of brominated flavin derivatives (5-deazaflavins, alloxazines, and isoalloxazines) with boronic acids or boronic acid esters that occur readily under mild conditions were shown to be an effective tool for the synthesis of a broad range of 7/8-arylflavins. In general, the introduction of an aryl/heteroaryl group by means of a direct C-C bond has been shown to be a promising approach to tuning the photophysical properties of flavin derivatives. The aryl substituents caused a bathochromic shift in the absorption spectra of up to 52 nm and prolonged the fluorescence lifetime by up to 1 order of magnitude. Moreover, arylation of flavin derivatives decreased their ability to generate singlet oxygen.
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Affiliation(s)
- Marek Čubiňák
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Naisargi Varma
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614Poznań, Poland
| | - Petr Oeser
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Adam Pokluda
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Tetiana Pavlovska
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Radek Cibulka
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28Prague 6, Czech Republic
| | - Marek Sikorski
- Faculty of Chemistry, Adam Mickiewicz University, Uniwersytetu Poznańskiego 8, 61-614Poznań, Poland
| | - Tomáš Tobrman
- Department of Organic Chemistry, University of Chemistry and Technology, Prague, Technická 5, 166 28Prague 6, Czech Republic
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3
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Arakawa Y, Sogabe Y, Minagawa K, Oshimura M, Hirano T, Ute K, Imada Y. Immobilization of a flavin molecule onto poly(methacrylic acid)s and its application in aerobic oxidation catalysis: effect of polymer stereoregularity. Org Biomol Chem 2023; 21:289-293. [PMID: 36503933 DOI: 10.1039/d2ob01834a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
The isoalloxazine ring system, called flavin, was successfully immobilized on poly(methacrylic acid)s, PMAAs, with different tacticity via post-polymerization modification under suitable conditions. The resulting flavin-containing polymers showed catalytic activity for aerobic oxidation reactions, in which the polymer stereoregularity clearly influenced their catalytic activity.
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Affiliation(s)
- Yukihiro Arakawa
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
| | - Yoshiko Sogabe
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
| | - Keiji Minagawa
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
| | - Miyuki Oshimura
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
| | - Tomohiro Hirano
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
| | - Koichi Ute
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
| | - Yasushi Imada
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima 770-8506, Japan.
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4
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Trenker S, Grunenberg L, Banerjee T, Savasci G, Poller LM, Muggli KIM, Haase F, Ochsenfeld C, Lotsch BV. A flavin-inspired covalent organic framework for photocatalytic alcohol oxidation. Chem Sci 2021; 12:15143-15150. [PMID: 34909156 PMCID: PMC8612393 DOI: 10.1039/d1sc04143f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Accepted: 11/02/2021] [Indexed: 12/02/2022] Open
Abstract
Covalent organic frameworks (COFs) offer a number of key properties that predestine them to be used as heterogeneous photocatalysts, including intrinsic porosity, long-range order, and light absorption. Since COFs can be constructed from a practically unlimited library of organic building blocks, these properties can be precisely tuned by choosing suitable linkers. Herein, we report the construction and use of a novel COF (FEAx-COF) photocatalyst, inspired by natural flavin cofactors. We show that the functionality of the alloxazine chromophore incorporated into the COF backbone is retained and study the effects of this heterogenization approach by comparison with similar molecular photocatalysts. We find that the integration of alloxazine chromophores into the framework significantly extends the absorption spectrum into the visible range, allowing for photocatalytic oxidation of benzylic alcohols to aldehydes even with low-energy visible light. In addition, the activity of the heterogeneous COF photocatalyst is less dependent on the chosen solvent, making it more versatile compared to molecular alloxazines. Finally, the use of oxygen as the terminal oxidant renders FEAx-COF a promising and “green” heterogeneous photocatalyst. In this manuscript, we report the development of a novel alloxazine COF inspired by naturally occurring flavin cofactors for photoredox catalysis.![]()
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Affiliation(s)
- Stefan Trenker
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany .,Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany.,Center for Nanoscience Schellingstr. 4 80799 Munich Germany
| | - Lars Grunenberg
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany .,Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany
| | - Tanmay Banerjee
- Department of Chemistry, Birla Institute of Technology and Science Pilani, Pilani Campus Rajasthan 333031 India
| | - Gökcen Savasci
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany .,Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany.,Center for Nanoscience Schellingstr. 4 80799 Munich Germany.,Karlsruhe Institute of Technology (KIT), IFG - Institute for Functional Interfaces Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Laura M Poller
- Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany
| | - Katharina I M Muggli
- Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany
| | - Frederik Haase
- Karlsruhe Institute of Technology (KIT), IFG - Institute for Functional Interfaces Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen Germany
| | - Christian Ochsenfeld
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany .,Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany.,Center for Nanoscience Schellingstr. 4 80799 Munich Germany.,e-conversion Cluster of Excellence Lichtenbergstr. 4a, 85748 Garching Germany
| | - Bettina V Lotsch
- Max Planck Institute for Solid State Research Heisenbergstr. 1 70569 Stuttgart Germany .,Department of Chemistry, University of Munich (LMU) Butenandtstr. 5-13 81377 Munich Germany.,Center for Nanoscience Schellingstr. 4 80799 Munich Germany.,e-conversion Cluster of Excellence Lichtenbergstr. 4a, 85748 Garching Germany
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5
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Hartman T, Reisnerová M, Chudoba J, Svobodová E, Archipowa N, Kutta RJ, Cibulka R. Photocatalytic Oxidative [2+2] Cycloelimination Reactions with Flavinium Salts: Mechanistic Study and Influence of the Catalyst Structure. Chempluschem 2021; 86:373-386. [DOI: 10.1002/cplu.202000767] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Revised: 12/22/2020] [Indexed: 01/19/2023]
Affiliation(s)
- Tomáš Hartman
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Martina Reisnerová
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Josef Chudoba
- Central Laboratories University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Eva Svobodová
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
| | - Nataliya Archipowa
- Manchester Institute of Biotechnology and School of Chemistry The University of Manchester Manchester M1 7DN United Kingdom
| | - Roger Jan Kutta
- Institute of Physical and Theoretical Chemistry University of Regensburg 93040 Regensburg Germany
| | - Radek Cibulka
- Department of Organic Chemistry University of Chemistry and Technology, Prague Technická 5 166 28 Prague 6 Czech Republic
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6
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Zhang S, Yi D, Li G, Li L, Zhao G, Tang Z. Biomimetic alloxan-catalyzed intramolecular redox reaction with O2: One-pot atom-economic synthesis of sulfinyl-functionalized benzimidazoles. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152688] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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7
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Srivastava V, Singh PK, Srivastava A, Singh PP. Synthetic applications of flavin photocatalysis: a review. RSC Adv 2021. [DOI: 10.1039/d1ra00925g] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Encouraging developments in the field of photocatalysis in last decades, biomolecules namely flavins have been observed to act as a catalyst in several photoredox-catalysed synthetic methodologies.
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Affiliation(s)
- Vishal Srivastava
- Department of Chemistry
- CMP Degree College
- University of Allahabad
- Prayagraj 211002
- India
| | - Pravin K. Singh
- Department of Chemistry
- CMP Degree College
- University of Allahabad
- Prayagraj 211002
- India
| | - Arjita Srivastava
- Department of Chemistry
- CMP Degree College
- University of Allahabad
- Prayagraj 211002
- India
| | - Praveen P. Singh
- Department of Chemistry
- United College of Engineering & Research
- Prayagraj 211010
- India
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8
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Tanikami Y, Tagami T, Sakamoto M, Arakawa Y, Mizuguchi H, Imada Y, Takayanagi T. Determination of acid dissociation constants of flavin analogues by capillary zone electrophoresis. Electrophoresis 2020; 41:1316-1325. [PMID: 32386342 DOI: 10.1002/elps.202000066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/18/2020] [Accepted: 04/27/2020] [Indexed: 11/06/2022]
Abstract
Acid dissociation constants (pKa ) of nine kinds of flavin analogues as molecular catalyst candidates were determined by CZE. Although some of the analogues are instable and degradable under the light exposure or in alkaline aqueous solutions, the effective electrophoretic mobility of the flavin analogue of interest has been measured with the residual substance. The pKa values of the flavin analogues were analyzed through the changes in the effective electrophoretic mobility with varying pH of the separation buffer. One or two steps pKa values were determined by the analysis. One of the degraded species from the flavin analogues, lumichrome, was also detected in the CZE analysis, and its pKa values were also determined. While coexisting impurities generated over the storage conditions were found in some analogues, the pKa values of the target analogues were successfully determined with the help of the CZE separations. A pressure-assisted CZE was utilized for the determination or the estimation of the pKa values of such analogues as possessing carboxylic acid moiety.
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Affiliation(s)
- Yuki Tanikami
- Graduate School of Advanced Technology and Science, Tokushima University, Tokushima, Japan
| | - Takuma Tagami
- Graduate School of Advanced Technology and Science, Tokushima University, Tokushima, Japan
| | - Mayu Sakamoto
- Department of Chemical Science and Technology, Faculty of Engineering, Tokushima University, Tokushima, Japan
| | - Yukihiro Arakawa
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
| | - Hitoshi Mizuguchi
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
| | - Yasushi Imada
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
| | - Toshio Takayanagi
- Graduate School of Technology, Industrial and Social Sciences, Tokushima University, Tokushima, Japan
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9
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Zhang S, Li G, Li L, Deng X, Zhao G, Cui X, Tang Z. Alloxan-Catalyzed Biomimetic Oxidations with Hydrogen Peroxide or Molecular Oxygen. ACS Catal 2019. [DOI: 10.1021/acscatal.9b04508] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shiqi Zhang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Guangxun Li
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Ling Li
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xiongfei Deng
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Gang Zhao
- School of Chemical Engineering, Sichuan University, Chengdu, Sichuan 610065, China
| | - Xin Cui
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
| | - Zhuo Tang
- Natural Products Research Center, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
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10
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Abstract
Nitrones are important compounds and are highly useful in many aspects. The first part describes the methods for synthesis of nitrones, which are useful and environmentally friendly. Catalytic oxidations, condensations, and other useful reactions are described. The nitrones thus obtained are key intermediates for the synthesis of biologically important nitrogen compounds. The second part describes the fundamental transformations of nitrones, which will provide the strategies and means for the construction of nitrogen compounds. The reactions with nucleophiles or radicals, C-H functionalization, and various addition reactions are described. The last reactions are particularly important for highly selective carbon-carbon bond formations. 1,3-Dipolar cycloaddition reactions are excluded because the size of the review is limited and excellent reviews have been published in Chemical Reviews.
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Affiliation(s)
- Shun-Ichi Murahashi
- Department of Chemistry, Graduate School of Engineering Science , Osaka University , 1-3, Machikaneyama , Toyonaka , Osaka 560-8531 , Japan
| | - Yasushi Imada
- Department of Applied Chemistry , Tokushima University , 2-1, Minamijosanjima , Tokushima 770-8506 , Japan
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11
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Oonishi T, Kawahara T, Arakawa Y, Minagawa K, Imada Y. Greener Preparation of 5-Ethyl-4a-hydroxyisoalloxazine and Its Use for Catalytic Aerobic Oxygenations. European J Org Chem 2019. [DOI: 10.1002/ejoc.201801865] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Takahiro Oonishi
- Department of Applied Chemistry; Tokushima University; Minamijosanjima Tokushima 770-8506 Japan
| | - Takayuki Kawahara
- Department of Applied Chemistry; Tokushima University; Minamijosanjima Tokushima 770-8506 Japan
| | - Yukihiro Arakawa
- Department of Applied Chemistry; Tokushima University; Minamijosanjima Tokushima 770-8506 Japan
| | - Keiji Minagawa
- Department of Applied Chemistry; Tokushima University; Minamijosanjima Tokushima 770-8506 Japan
- Institute of Liberal Arts and Sciences; Tokushima University; Minamijosanjima Tokushima 770-8502 Japan
| | - Yasushi Imada
- Department of Applied Chemistry; Tokushima University; Minamijosanjima Tokushima 770-8506 Japan
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12
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13
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Sakai T, Kumoi T, Ishikawa T, Nitta T, Iida H. Comparison of riboflavin-derived flavinium salts applied to catalytic H 2O 2 oxidations. Org Biomol Chem 2018; 16:3999-4007. [PMID: 29766194 DOI: 10.1039/c8ob00856f] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A series of flavinium salts, 5-ethylisoalloxazinium, 5-ethylalloxazinium, and 1,10-ethylene-bridged alloxazinium triflates, were prepared from commercially available riboflavin. This study presents a comparison between their optical and redox properties, and their catalytic activity in H2O2 oxidations of sulfide, tertiary amine, and cyclobutanone. Reflecting the difference between the π-conjugated ring structures, the flavinium salts displayed very different redox properties, with reduction potentials in the order of: 5-ethylisoalloxazinium > 5-ethylalloxazinium > 1,10-ethylene-bridged alloxazinium. A comparison of their catalytic activity revealed that 5-ethylisoalloxazinium triflate specifically oxidises sulfide and cyclobutanone, and 5-ethylalloxazinium triflate smoothly oxidises tertiary amine. 1,10-Bridged alloxazinium triflate, which can be readily obtained from riboflavin in large quantities, showed moderate catalytic activity for the H2O2 oxidation of sulfide and cyclobutanone.
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Affiliation(s)
- Takuya Sakai
- Department of Chemistry, Graduate School of Natural Science and Technology, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan.
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14
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Arakawa Y, Yamanomoto K, Kita H, Minagawa K, Tanaka M, Haraguchi N, Itsuno S, Imada Y. Design of peptide-containing N5-unmodified neutral flavins that catalyze aerobic oxygenations. Chem Sci 2017; 8:5468-5475. [PMID: 30155226 PMCID: PMC6102831 DOI: 10.1039/c7sc01933e] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2017] [Accepted: 05/20/2017] [Indexed: 11/21/2022] Open
Abstract
Simulation of the monooxygenation function of flavoenzyme (Fl-Enz) has been long-studied with N5-modified cationic flavins (FlEt+ ), but never with N5-unmodified neutral flavins (Fl) despite the fact that Fl is genuinely equal to the active center of Fl-Enz. This is because of the greater lability of 4a-hydroperoxy adduct of Fl, FlOOH , compared to those of FlEt+ , FlEtOOH , and Fl-Enz, FlOOH-Enz. In this study, Fl incorporated into a short peptide, flavopeptide (Fl-Pep), was designed by a rational top-down approach using a computational method, which could stabilize the corresponding 4a-hydroperoxy adduct (FlOOH-Pep) through intramolecular hydrogen bonds. We report catalytic chemoselective sulfoxidation as well as Baeyer-Villiger oxidation by means of Fl-Pep under light-shielding and aerobic conditions, which are the first Fl-Enz-mimetic aerobic oxygenation reactions catalyzed by Fl under non-enzymatic conditions.
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Affiliation(s)
- Yukihiro Arakawa
- Department of Applied Chemistry , Tokushima University , Minamijosanjima , Tokushima 770-8506 , Japan .
| | - Ken Yamanomoto
- Department of Applied Chemistry , Tokushima University , Minamijosanjima , Tokushima 770-8506 , Japan .
| | - Hazuki Kita
- Department of Applied Chemistry , Tokushima University , Minamijosanjima , Tokushima 770-8506 , Japan .
| | - Keiji Minagawa
- Department of Applied Chemistry , Tokushima University , Minamijosanjima , Tokushima 770-8506 , Japan .
- Institute of Liberal Arts and Sciences , Tokushima University , Minamijosanjima , Tokushima 770-8502 , Japan
| | - Masami Tanaka
- Faculty of Pharmaceutical Sciences , Tokushima Bunri University , Yamashiro , Tokushima 770-8514 , Japan
| | - Naoki Haraguchi
- Department of Environmental and Life Sciences , Toyohashi University of Technology , Toyohashi 441-8580 , Japan
| | - Shinichi Itsuno
- Department of Environmental and Life Sciences , Toyohashi University of Technology , Toyohashi 441-8580 , Japan
| | - Yasushi Imada
- Department of Applied Chemistry , Tokushima University , Minamijosanjima , Tokushima 770-8506 , Japan .
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15
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Ishikawa T, Kimura M, Kumoi T, Iida H. Coupled Flavin-Iodine Redox Organocatalysts: Aerobic Oxidative Transformation from N-Tosylhydrazones to 1,2,3-Thiadiazoles. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01535] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Tatsuro Ishikawa
- Department of Chemistry,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Maasa Kimura
- Department of Chemistry,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Takuma Kumoi
- Department of Chemistry,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
| | - Hiroki Iida
- Department of Chemistry,
Interdisciplinary Graduate School of Science and Engineering, Shimane University, 1060 Nishikawatsu, Matsue 690-8504, Japan
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16
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Arakawa Y, Oonishi T, Kohda T, Minagawa K, Imada Y. Facile Preparation of Flavinium Organocatalysts. CHEMSUSCHEM 2016; 9:2769-2773. [PMID: 27553682 DOI: 10.1002/cssc.201600846] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 07/28/2016] [Indexed: 06/06/2023]
Abstract
We developed a safe, simple, inexpensive, and environmentally benign method for preparing N(5)-ethylated flavinium organocatalysts without using hazardous reagents or inert conditions as previously required. 5-Ethyl-3-methyllumiflavinium cation was prepared from its reduced form by NaNO2 -free aerobic oxidation, which was subsequently extracted onto commercial cation-exchange resins under NaClO4 -free conditions. The resulting resin-immobilized flavinium salts were found to be effective organocatalysts for aerobic oxidation reactions.
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Affiliation(s)
- Yukihiro Arakawa
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima, 770-8506, Japan
| | - Takahiro Oonishi
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima, 770-8506, Japan
| | - Takahiro Kohda
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima, 770-8506, Japan
| | - Keiji Minagawa
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima, 770-8506, Japan
- Institute of Liberal Arts and Sciences, Tokushima University, Minamijosanjima, Tokushima, 770-8506, Japan
| | - Yasushi Imada
- Department of Applied Chemistry, Tokushima University, Minamijosanjima, Tokushima, 770-8506, Japan.
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17
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Iida H, Ishikawa T, Nomura K, Murahashi SI. Anion effect of 5-ethylisoalloxazinium salts on flavin-catalyzed oxidations with H2O2. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.08.076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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18
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Han L, Feng Y, Luo M, Yuan Z, Shao X, Xu X, Li Z. 2,2,2-Trifluoroethanol activated one-pot Mannich-like reaction of β-nitroenamines, secondary amines, and aromatic aldehydes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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19
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Pieber B, Cox DP, Kappe CO. Selective Olefin Reduction in Thebaine Using Hydrazine Hydrate and O2 under Intensified Continuous Flow Conditions. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00370] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bartholomäus Pieber
- Institute
of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
| | - D. Phillip Cox
- Noramco,
Inc., 503 Carr Road, Suite 200, Wilmington, Delaware 19809, United States
| | - C. Oliver Kappe
- Institute
of Chemistry, University of Graz, Heinrichstrasse 28, A-8010 Graz, Austria
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20
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Aerobic oxidation of hydroxylamines with nanoporous gold catalyst as an efficient synthetic method of nitrones. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.05.094] [Citation(s) in RCA: 13] [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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21
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Pereira PC, Arends IW, Sheldon RA. Optimizing the chloroperoxidase–glucose oxidase system: The effect of glucose oxidase on activity and enantioselectivity. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.02.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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22
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Iida H, Imada Y, Murahashi SI. Biomimetic flavin-catalysed reactions for organic synthesis. Org Biomol Chem 2015; 13:7599-613. [DOI: 10.1039/c5ob00854a] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Using simple riboflavin related compounds as biomimetic catalysts, catalytic oxidation of various substrates with hydrogen peroxide or molecular oxygen can be performed selectively under mild conditions. The principle of these reactions is fundamental and will provide a wide scope for environmentally benign future practical methods.
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Affiliation(s)
- H. Iida
- Department of Chemistry
- Interdisciplinary Graduate School of Science and Engineering
- Shimane University
- Matsue 690-8504
- Japan
| | - Y. Imada
- Department of Chemical Science and Technology
- Tokushima University
- Tokushima 770-8506
- Japan
| | - S.-I. Murahashi
- Department of Chemistry
- Okayama University of Science
- Okayama 700-0005
- Japan
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23
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Cibulka R. Artificial Flavin Systems for Chemoselective and Stereoselective Oxidations. European J Org Chem 2014. [DOI: 10.1002/ejoc.201403275] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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24
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Imada Y, Osaki M, Noguchi M, Maeda T, Fujiki M, Kawamorita S, Komiya N, Naota T. Flavin-Functionalized Gold Nanoparticles as an Efficient Catalyst for Aerobic Organic Transformations. ChemCatChem 2014. [DOI: 10.1002/cctc.201402619] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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25
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Zelenka J, Hartman T, Klímová K, Hampl F, Cibulka R. Phase-Transfer Catalysis in Oxidations Based on the Covalent Bonding of Hydrogen Peroxide to Amphiphilic Flavinium Salts. ChemCatChem 2014. [DOI: 10.1002/cctc.201402533] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Murahashi SI, Zhang D, Iida H, Miyawaki T, Uenaka M, Murano K, Meguro K. Flavin-catalyzed aerobic oxidation of sulfides and thiols with formic acid/triethylamine. Chem Commun (Camb) 2014; 50:10295-8. [DOI: 10.1039/c4cc05216a] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and practical method for flavin-catalyzed aerobic oxidation of sulfides and thiols with formic acid/TEA is described.
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Affiliation(s)
- Shun-Ichi Murahashi
- Department of Chemistry
- Okayama University of Science, Ridai-cho
- Okayama, Japan
| | - Dazhi Zhang
- Department of Chemistry
- Okayama University of Science, Ridai-cho
- Okayama, Japan
| | - Hiroki Iida
- Department of Molecular Design and Engineering
- Graduate School of Engineering
- Nagoya University
- Chikusa-kuNagoya, Japan
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27
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Hu YL, Fang D, Xing R. Efficient and convenient oxidation of sulfides to sulfoxides with molecular oxygen catalyzed by Mn(OAc)2 in ionic liquid [C12mim][NO3]. RSC Adv 2014. [DOI: 10.1039/c4ra06695b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
A simple, efficient, and eco-friendly procedure for aerobic oxidation of sulfides catalyzed by Mn(OAc)2/[C12mim][NO3] has been developed.
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Affiliation(s)
- Yu-Lin Hu
- College of Chemistry and Chemical Engineering
- Yancheng Teachers University
- Yancheng 224002, P. R. China
| | - Dong Fang
- College of Chemistry and Chemical Engineering
- Yancheng Teachers University
- Yancheng 224002, P. R. China
| | - Rong Xing
- College of Chemistry and Chemical Engineering
- Yancheng Teachers University
- Yancheng 224002, P. R. China
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28
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Imada Y, Kitagawa T, Iwata S, Komiya N, Naota T. Oxidation of sulfides with hydrogen peroxide catalyzed by synthetic flavin adducts with dendritic bis(acylamino)pyridines. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.11.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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29
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Kotoučová H, Strnadová I, Kovandová M, Chudoba J, Dvořáková H, Cibulka R. Biomimetic aerobic oxidative hydroxylation of arylboronic acids to phenols catalysed by a flavin derivative. Org Biomol Chem 2014; 12:2137-42. [DOI: 10.1039/c3ob42081g] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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30
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Ménová P, Dvořáková H, Eigner V, Ludvík J, Cibulka R. Electron-Deficient Alloxazinium Salts: Efficient Organocatalysts of Mild and Chemoselective Sulfoxidations with Hydrogen Peroxide. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300617] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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31
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Imada Y, Kugimiya Y, Iwata S, Komiya N, Naota T. Non-covalently dendronized flavins as organocatalysts for aerobic reduction of olefins. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.07.082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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32
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Suzuki K, Watanabe T, Murahashi SI. Oxidation of primary amines to oximes with molecular oxygen using 1,1-diphenyl-2-picrylhydrazyl and WO3/Al2O3 as catalysts. J Org Chem 2013; 78:2301-10. [PMID: 23437775 DOI: 10.1021/jo302262a] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The oxidative transformation of primary amines to their corresponding oximes proceeds with high efficiency under molecular oxygen diluted with molecular nitrogen (O2/N2 = 7/93 v/v, 5 MPa) in the presence of the catalysts 1,1-diphenyl-2-picrylhydrazyl (DPPH) and tungusten oxide/alumina (WO3/Al2O3). The method is environmentally benign, because the reaction requires only molecular oxygen as the terminal oxidant and gives water as a side product. Various alicyclic amines and aliphatic amines can be converted to their corresponding oximes in excellent yields. It is noteworthy that the oxidative transformation of primary amines proceeds chemoselectively in the presence of other functional groups. The key step of the present oxidation is a fast electron transfer from the primary amine to DPPH followed by proton transfer to give the α-aminoalkyl radical intermediate, which undergoes reaction with molecular oxygen and hydrogen abstraction to give α-aminoalkyl hydroperoxide. Subsequent reaction of the peroxide with WO3/Al2O3 gives oximes. The aerobic oxidation of secondary amines gives the corresponding nitrones. Aerobic oxidative transformation of cyclohexylamines to cyclohexanone oximes is important as a method for industrial production of ε-caprolactam, a raw material for Nylon 6.
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Affiliation(s)
- Ken Suzuki
- R&D Planning and Business Development, Asahi Kasei Chemicals Corporation, 1-105 Kanda Jinbocho, Chiyoda-ku, Tokyo 101-0051, Japan.
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33
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Imada Y, Kitagawa T, Wang HK, Komiya N, Naota T. Flavin-catalyzed aerobic oxidation of sulfides in aqueous media. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2012.11.133] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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34
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Daďová J, Kümmel S, Feldmeier C, Cibulková J, Pažout R, Maixner J, Gschwind RM, König B, Cibulka R. Aggregation Effects in Visible-Light Flavin Photocatalysts: Synthesis, Structure, and Catalytic Activity of 10-Arylflavins. Chemistry 2012. [DOI: 10.1002/chem.201202488] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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35
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Ménová P, Cibulka R. Insight into the catalytic activity of alloxazinium and isoalloxazinium salts in the oxidations of sulfides and amines with hydrogen peroxide. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcata.2012.07.012] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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36
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37
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Chen S, Foss FW. Aerobic Organocatalytic Oxidation of Aryl Aldehydes: Flavin Catalyst Turnover by Hantzsch’s Ester. Org Lett 2012; 14:5150-3. [DOI: 10.1021/ol302479b] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shuai Chen
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019, United States
| | - Frank W. Foss
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, 700 Planetarium Place, Arlington, Texas 76019, United States
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38
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Iida H, Iwahana S, Mizoguchi T, Yashima E. Main-Chain Optically Active Riboflavin Polymer for Asymmetric Catalysis and Its Vapochromic Behavior. J Am Chem Soc 2012; 134:15103-13. [DOI: 10.1021/ja306159t] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Hiroki Iida
- Department of Molecular
Design and Engineering, Graduate
School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Soichiro Iwahana
- Department of Molecular
Design and Engineering, Graduate
School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Tomohisa Mizoguchi
- Department of Molecular
Design and Engineering, Graduate
School of Engineering, Nagoya University, Nagoya 464-8603, Japan
| | - Eiji Yashima
- Department of Molecular
Design and Engineering, Graduate
School of Engineering, Nagoya University, Nagoya 464-8603, Japan
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39
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Chen S, Hossain MS, Foss FW. Organocatalytic Dakin Oxidation by Nucleophilic Flavin Catalysts. Org Lett 2012; 14:2806-9. [DOI: 10.1021/ol3010326] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shuai Chen
- The University of Texas at Arlington, Department of Chemistry and Biochemistry, Arlington, Texas 76019-0065, United States
| | - Mohammad S. Hossain
- The University of Texas at Arlington, Department of Chemistry and Biochemistry, Arlington, Texas 76019-0065, United States
| | - Frank W. Foss
- The University of Texas at Arlington, Department of Chemistry and Biochemistry, Arlington, Texas 76019-0065, United States
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40
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Ménová P, Eigner V, Čejka J, Dvořáková H, Šanda M, Cibulka R. Synthesis and structural studies of flavin and alloxazine adducts with O-nucleophiles. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.08.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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41
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Imada Y, Iida H, Kitagawa T, Naota T. Aerobic Reduction of Olefins by In Situ Generation of Diimide with Synthetic Flavin Catalysts. Chemistry 2011; 17:5908-20. [DOI: 10.1002/chem.201003278] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Indexed: 11/05/2022]
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42
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Teichert JF, den Hartog T, Hanstein M, Smit C, ter Horst B, Hernandez-Olmos V, Feringa BL, Minnaard AJ. Organocatalytic Reduction of Carbon−Carbon Double Bonds in Racemization-Sensitive Compounds. ACS Catal 2011. [DOI: 10.1021/cs100121m] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Johannes F. Teichert
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Tim den Hartog
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Miriam Hanstein
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Christian Smit
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Bjorn ter Horst
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Victor Hernandez-Olmos
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Ben L. Feringa
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Adriaan J. Minnaard
- Stratingh Institute for Chemistry, University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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43
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Murahashi SI. Development of biomimetic catalytic oxidation methods and non-salt methods using transition metal-based acid and base ambiphilic catalysts. PROCEEDINGS OF THE JAPAN ACADEMY. SERIES B, PHYSICAL AND BIOLOGICAL SCIENCES 2011; 87:242-253. [PMID: 21558760 PMCID: PMC3165902 DOI: 10.2183/pjab.87.242] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 03/11/2011] [Indexed: 05/30/2023]
Abstract
This review focuses on the development of ruthenium and flavin catalysts for environmentally benign oxidation reactions based on mimicking the functions of cytochrome P-450 and flavoenzymes, and low valent transition-metal catalysts that replace conventional acids and bases. Several new concepts and new types of catalytic reactions based on these concepts are described. (Communicated by Ryoji Noyori, M.J.A.).
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44
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Mojr V, Buděšínský M, Cibulka R, Kraus T. Alloxazine–cyclodextrin conjugates for organocatalytic enantioselective sulfoxidations. Org Biomol Chem 2011; 9:7318-26. [DOI: 10.1039/c1ob05934c] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Xu HJ, Lin YC, Wan X, Yang CY, Feng YS. Selective aerobic oxidation of sulfides to sulfoxides catalyzed by coenzyme NAD+ models. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.076] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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46
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Jurok R, Cibulka R, Dvořáková H, Hampl F, Hodačová J. Planar Chiral Flavinium Salts - Prospective Catalysts for Enantioselective Sulfoxidation Reactions. European J Org Chem 2010. [DOI: 10.1002/ejoc.201000592] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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47
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Žurek J, Cibulka R, Dvořáková H, Svoboda J. N1,N10-Ethylene-bridged flavinium salts derived from l-valinol: synthesis and catalytic activity in H2O2 oxidations. Tetrahedron Lett 2010. [DOI: 10.1016/j.tetlet.2009.12.096] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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48
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Lechner R, Kümmel S, König B. Visible light flavin photo-oxidation of methylbenzenes, styrenes and phenylacetic acids. Photochem Photobiol Sci 2010; 9:1367-77. [DOI: 10.1039/c0pp00202j] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Mojr V, Herzig V, Buděšínský M, Cibulka R, Kraus T. Flavin–cyclodextrin conjugates as catalysts of enantioselective sulfoxidations with hydrogen peroxide in aqueous media. Chem Commun (Camb) 2010; 46:7599-601. [DOI: 10.1039/c0cc02562c] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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50
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Imada Y, Kitagawa T, Ohno T, Iida H, Naota T. Neutral Flavins: Green and Robust Organocatalysts for Aerobic Hydrogenation of Olefins. Org Lett 2009; 12:32-5. [DOI: 10.1021/ol902393p] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yasushi Imada
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Takahiro Kitagawa
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Takashi Ohno
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Hiroki Iida
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
| | - Takeshi Naota
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Machikaneyama, Toyonaka, Osaka 560-8531, Japan
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