1
|
Poorjafari Jafroodi P, O Mahmoodi N. Alkaline Transition Metal‐Free Oxidative Coupling of Benzylic and Quasi Benzylic sp
3
Bonds with O
2. ChemistrySelect 2023. [DOI: 10.1002/slct.202202860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
| | - Nosrat O Mahmoodi
- Department of Chemistry, Faculty of Sciences University of Guilan PO Box 41335-1914 Rasht Iran
| |
Collapse
|
2
|
Huang W, Huang S, Sun Z, Zhang W, Zeng Z, Yuan B. Chemoenzymatic Synthesis of Sterically Hindered Biaryls by Suzuki Coupling and Vanadium Chloroperoxidase Catalyzed Halogenations. Chembiochem 2023; 24:e202200610. [PMID: 36325954 DOI: 10.1002/cbic.202200610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 11/02/2022] [Indexed: 11/06/2022]
Abstract
Halogenated biaryls are vital structural skeletons in bioactive products. In this study, an effective chemoenzymatic halogenation by vanadium-dependent chloroperoxidase from Camponotus inaequalis (CiVCPO) enabled the transformation of freely rotating biaryl bonds to sterically hindered axis. The yields were up to 84 % for the tribrominated biaryl products and up to 65 % when isolated. Furthermore, a one-pot, two-step chemoenzymatic strategy by incorporating transition metal catalyzed Suzuki coupling and the chemoenzymatic halogenation in aqueous phase were described. This strategy demonstrates a simplified one-pot reaction sequence with organometallic and biocatalytic procedures under economical and environmentally beneficial conditions that may inspire further research on synthesis of sterically hindered biaryls.
Collapse
Affiliation(s)
- Wansheng Huang
- School of Pharmacy, Hubei University of Science and Technology, 88 Xianning Avenue, Xianning, Hubei, 437100, P. R. China.,Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin, 300308, P. R. China
| | - Shengtang Huang
- School of Pharmacy, Hubei University of Science and Technology, 88 Xianning Avenue, Xianning, Hubei, 437100, P. R. China
| | - Zhoutong Sun
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin, 300308, P. R. China.,National Innovation Center for Synthetic Biotechnology, 32 West 7th Avenue, Tianjin, 300308, P. R. China
| | - Wuyuan Zhang
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin, 300308, P. R. China.,National Innovation Center for Synthetic Biotechnology, 32 West 7th Avenue, Tianjin, 300308, P. R. China
| | - Zhigang Zeng
- School of Nuclear Technology and Chemistry & Biology, Hubei Key Laboratory of Radiation Chemistry and Functional Materials, Hubei University of Science and Technology, 88 Xianning Avenue, Xianning, Hubei, 437100, P. R. China.,Hubei Industry Technology Research Institute of Intelligent Health, 88 Xianning Avenue, Xianning, Hubei, 437100, P. R. China
| | - Bo Yuan
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, 32 West 7th Avenue, Tianjin, 300308, P. R. China.,National Innovation Center for Synthetic Biotechnology, 32 West 7th Avenue, Tianjin, 300308, P. R. China
| |
Collapse
|
3
|
Direct Synthesis of Dialkylphosphites from White Phosphorus. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
4
|
Van Kerrebroeck R, Horsten T, Stevens CV. BROMIDE OXIDATION: A SAFE STRATEGY FOR ELECTROPHILIC BROMINATIONS. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200310] [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)
| | - Tomas Horsten
- Ghent University: Universiteit Gent Green Chemistry and Technology BELGIUM
| | | |
Collapse
|
5
|
Paik A, Paul S, Bhowmik S, Das R, Naveen T, Rana S. Recent Advances in First Row Transition Metal Mediated C‐H Halogenation of (Hetero)arenes and Alkanes. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200060] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Aniruddha Paik
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Sabarni Paul
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Sabyasachi Bhowmik
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Rahul Das
- University of North Bengal Department of Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India - 734013 734013 Siliguri INDIA
| | - Togati Naveen
- Sardar Vallabhbhai National Institute of Technology Department of Chemistry 395007 Surat INDIA
| | - Sujoy Rana
- University of North Bengal Chemistry Raja Rammohunpur, DarjeelingWest Bengal, India, 734013 734013 Siliguri INDIA
| |
Collapse
|
6
|
Hahn P, Köhler T, Börner M, Kersting B. Halogenation of calix[4]arenes by [I(py)2]I3·2I2†. Aust J Chem 2022. [DOI: 10.1071/ch22031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
7
|
Liang S, Hofman K, Friedrich M, Keller J, Manolikakes G. Recent Progress and Emerging Technologies towards a Sustainable Synthesis of Sulfones. CHEMSUSCHEM 2021; 14:4878-4902. [PMID: 34476903 PMCID: PMC9292207 DOI: 10.1002/cssc.202101635] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/02/2021] [Indexed: 06/12/2023]
Abstract
Sulfones play a pivotal role in modern organic chemistry. They are highly versatile building blocks and find various applications as drugs, agrochemicals, or functional materials. Therefore, sustainable access to this class of molecules is of great interest. Herein, the goal was to provide a summary on recent developments in the field of sustainable sulfone synthesis. Advances and existing limitations in traditional approaches towards sulfones were reviewed on selected examples. Furthermore, novel emerging technologies for a more sustainable sulfone synthesis and future directions were discussed.
Collapse
Affiliation(s)
- Shuai Liang
- Department of Medicinal Chemistry, School of PharmacyQingdao University Medical CollegeNo.1 Ningde Road266073QingdaoP. R. China
| | - Kamil Hofman
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Str. Geb. 54D-67663KaiserslauternGermany
| | - Marius Friedrich
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Str. Geb. 54D-67663KaiserslauternGermany
| | - Julian Keller
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Str. Geb. 54D-67663KaiserslauternGermany
| | - Georg Manolikakes
- Department of ChemistryTU KaiserslauternErwin-Schrödinger-Str. Geb. 54D-67663KaiserslauternGermany
| |
Collapse
|
8
|
Bleher K, Comba P, Faltermeier D, Gupta A, Kerscher M, Krieg S, Martin B, Velmurugan G, Yang S. Non-Heme-Iron-Mediated Selective Halogenation of Unactivated Carbon-Hydrogen Bonds. Chemistry 2021; 28:e202103452. [PMID: 34792224 PMCID: PMC9300152 DOI: 10.1002/chem.202103452] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Indexed: 12/23/2022]
Abstract
Oxidation of the iron(II) precursor [(L1)FeIICl2], where L1 is a tetradentate bispidine, with soluble iodosylbenzene (sPhIO) leads to the extremely reactive ferryl oxidant [(L1)(Cl)FeIV=O]+ with a cis disposition of the chlorido and oxido coligands, as observed in non‐heme halogenase enzymes. Experimental data indicate that, with cyclohexane as substrate, there is selective formation of chlorocyclohexane, the halogenation being initiated by C−H abstraction and the result of a rebound of the ensuing radical to an iron‐bound Cl−. The time‐resolved formation of the halogenation product indicates that this primarily results from sPhIO oxidation of an initially formed oxido‐bridged diiron(III) resting state. The high yield of up to >70 % (stoichiometric reaction) as well as the differing reactivities of free Fe2+ and Fe3+ in comparison with [(L1)FeIICl2] indicate a high complex stability of the bispidine‐iron complexes. DFT analysis shows that, due to a large driving force and small triplet‐quintet gap, [(L1)(Cl)FeIV=O]+ is the most reactive small‐molecule halogenase model, that the FeIII/radical rebound intermediate has a relatively long lifetime (as supported by experimentally observed cage escape), and that this intermediate has, as observed experimentally, a lower energy barrier to the halogenation than the hydroxylation product; this is shown to primarily be due to steric effects.
Collapse
Affiliation(s)
- Katharina Bleher
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Peter Comba
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Dieter Faltermeier
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Ashutosh Gupta
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Marion Kerscher
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Saskia Krieg
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Bodo Martin
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Gunasekaran Velmurugan
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| | - Shuyi Yang
- Universität Heidelberg, Anorganisch-Chemisches Institut und Interdisziplinäres Zentrum für Wissenschaftliches Rechnen (IWR), INF 270, 69120, Heidelberg, Germany
| |
Collapse
|
9
|
Langerman M, Hetterscheid DGH. Mechanistic Study of the Activation and the Electrocatalytic Reduction of Hydrogen Peroxide by Cu-tmpa in Neutral Aqueous Solution. ChemElectroChem 2021; 8:2783-2791. [PMID: 34589379 PMCID: PMC8453753 DOI: 10.1002/celc.202100436] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Revised: 05/04/2021] [Indexed: 11/29/2022]
Abstract
Hydrogen peroxide plays an important role as an intermediate and product in the reduction of dioxygen by copper enzymes and mononuclear copper complexes. The copper(II) tris(2-pyridylmethyl)amine complex (Cu-tmpa) has been shown to produce H2O2 as an intermediate during the electrochemical 4-electron reduction of O2. We investigated the electrochemical hydrogen peroxide reduction reaction (HPRR) by Cu-tmpa in a neutral aqueous solution. The catalytic rate constant of the reaction was shown to be one order of magnitude lower than the reduction of dioxygen. A significant solvent kinetic isotope effect (KIE) of 1.4 to 1.7 was determined for the reduction of H2O2, pointing to a Fenton-like reaction pathway as the likely catalytic mechanism, involving a single copper site that produces an intermediate copper(II) hydroxo species and a free hydroxyl radical anion in the process.
Collapse
Affiliation(s)
- Michiel Langerman
- Leiden Institute of ChemistryLeiden UniversityP.O Box 95022300 RALeidenThe Netherlands
| | | |
Collapse
|
10
|
Schlagintweit JF, Altmann PJ, Böth AD, Hofmann BJ, Jandl C, Kaußler C, Nguyen L, Reich RM, Pöthig A, Kühn FE. Activation of Molecular Oxygen by a Cobalt(II) Tetra-NHC Complex*. Chemistry 2021; 27:1311-1315. [PMID: 33125815 PMCID: PMC7898330 DOI: 10.1002/chem.202004758] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Indexed: 11/24/2022]
Abstract
The first dicobalt(III) μ2 -peroxo N-heterocyclic carbene (NHC) complex is reported. It can be quantitatively generated from a cobalt(II) compound bearing a 16-membered macrocyclic tetra-NHC ligand via facile activation of dioxygen from air at ambient conditions. The reaction proceeds via an end-on superoxo intermediate as demonstrated by EPR studies and DFT. The peroxo moiety can be cleaved upon addition of acetic acid, yielding the corresponding CoIII acetate complex going along with H2 O2 formation. In contrast, both CoII and CoIII complexes are also studied as catalysts to utilize air for olefin and alkane oxidation reactions; however, not resulting in product formation. The observations are rationalized by DFT-calculations, suggesting a nucleophilic nature of the dicobalt(III) μ2 -peroxo complex. All isolated compounds are characterized by NMR, ESI-MS, elemental analysis, EPR and SC-XRD.
Collapse
Affiliation(s)
- Jonas F. Schlagintweit
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| | - Philipp J. Altmann
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
- Single Crystal XRD Laboratory of the Catalysis Research CenterTechnische Universität MünchenErnst-Otto-Fischer-Str. 185747Garching bei MünchenGermany
| | - Alexander D. Böth
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| | - Benjamin J. Hofmann
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| | - Christian Jandl
- Single Crystal XRD Laboratory of the Catalysis Research CenterTechnische Universität MünchenErnst-Otto-Fischer-Str. 185747Garching bei MünchenGermany
| | - Clemens Kaußler
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| | - Linda Nguyen
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
- Ausbildungszentrum der Technischen Universität MünchenTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| | - Robert M. Reich
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| | - Alexander Pöthig
- Single Crystal XRD Laboratory of the Catalysis Research CenterTechnische Universität MünchenErnst-Otto-Fischer-Str. 185747Garching bei MünchenGermany
| | - Fritz E. Kühn
- Molecular CatalysisCatalysis Research Center and Department of ChemistryTechnische Universität MünchenLichtenbergstraße 485747Garching bei MünchenGermany
| |
Collapse
|
11
|
Richards K, Petit E, Legrand YM, Grison C. Eco-Friendly Methodology for the Formation of Aromatic Carbon-Heteroatom Bonds by Using Green Ionic Liquids. Chemistry 2021; 27:809-814. [PMID: 33037687 DOI: 10.1002/chem.202003827] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/23/2020] [Indexed: 11/08/2022]
Abstract
A new sustainable method is reported for the formation of aromatic carbon-heteroatom bonds under solvent-free and mild conditions (no co-oxidant, no strong acid and no toxic reagents) by using a new type of green ionic liquid. The bromination of methoxy arenes was chosen as a model reaction. The reaction methodology is based on only using natural sodium bromine, which is transformed into an electrophilic brominating reagent within an ionic liquid, easily prepared from the melted salt FeCl3 hexahydrate. Bromination reactions with this in-situ-generated reagent gave good yields and excellent regioselectivity under simple and environmentally friendly conditions. To understand the unusual bromine polarity reversal of sodium bromine without any strong oxidant, the molecular structure of the reaction medium was characterised by Raman and direct infusion electrospray ionisation mass spectroscopy (ESI-MS). An extensive computational investigation using density functional theory methods was performed to describe a mechanism that suggests indirect oxidation of Br- through new iron adducts. The versatility of the methodology was successively applied to nitration and thiocyanation of methoxy arenes using KNO3 and KSCN in melted hexahydrated FeCl3 .
Collapse
Affiliation(s)
- Kenza Richards
- Laboratoire de Chimie Bio-Inspirée et d'Innovations Ecologiques, ChimEco UMR 5021, CNRS-, Université de Montpellier, Cap Delta, 1682 Rue de la Valsière, 34790, Grabels, France
| | - Eddy Petit
- Institut Européen des Membranes, IEM UMR 5635 CNRS-Université de Montpellier, 300 Av. Prof. E. Jeanbrau, 34095, Montpellier, France
| | - Yves-Marie Legrand
- Laboratoire de Chimie Bio-Inspirée et d'Innovations Ecologiques, ChimEco UMR 5021, CNRS-, Université de Montpellier, Cap Delta, 1682 Rue de la Valsière, 34790, Grabels, France
| | - Claude Grison
- Laboratoire de Chimie Bio-Inspirée et d'Innovations Ecologiques, ChimEco UMR 5021, CNRS-, Université de Montpellier, Cap Delta, 1682 Rue de la Valsière, 34790, Grabels, France
| |
Collapse
|
12
|
Yang Y, Gao X, Zeng X, Han J, Xu B. Hydrogen-Bond-Donor Solvents Enable Catalyst-Free (Radio)-Halogenation and Deuteration of Organoborons. Chemistry 2020; 27:1297-1300. [PMID: 32966636 DOI: 10.1002/chem.202003919] [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: 08/25/2020] [Revised: 09/17/2020] [Indexed: 12/25/2022]
Abstract
A hydrogen bond donor solvent assisted (radio)halogenation and deuteration of organoborons has been developed. The reactions exhibited high functional group tolerance and needed only an ambient atmosphere. Most importantly, compared to literature methods, our conditions are more consistent with the principals of green chemistry (e.g., metal-free, strong oxidant-free, more straightforward conditions).
Collapse
Affiliation(s)
- Yi Yang
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| | - Xinyan Gao
- Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai, P. R. China
| | - Xiaojun Zeng
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| | - Junbin Han
- Institute of Radiation Medicine, Fudan University, 2094 Xietu Road, Shanghai, P. R. China
| | - Bo Xu
- Key Laboratory of Science and Technology of Eco-Textiles, Ministry of Education, College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, Shanghai, 201620, P. R. China
| |
Collapse
|
13
|
Mamontov A, Martin-Mingot A, Métayer B, Karam O, Zunino F, Bouazza F, Thibaudeau S. Complementary Site-Selective Halogenation of Nitrogen-Containing (Hetero)Aromatics with Superacids. Chemistry 2020; 26:10411-10416. [PMID: 32212405 DOI: 10.1002/chem.202000902] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Indexed: 12/11/2022]
Abstract
Site-selective functionalization of arenes that is complementary to classical aromatic substitution reactions remains a long-standing quest in organic synthesis. Exploiting the generation of halenium ion through oxidative process and the protonation of the nitrogen containing function in HF/SbF5 , the chlorination and iodination of classically inert Csp2 -H bonds of aromatic amines occurs. Furthermore, the superacid-promoted (poly)protonation of the molecules acts as a protection, favoring the late-stage selective halogenation of natural alkaloids and active pharmaceutical ingredients.
Collapse
Affiliation(s)
- Alexander Mamontov
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Superacid Group - Organic Synthesis Team, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France.,@rtMolecule, 1 rue Georges Bonnet, Bâtiment B37, 86000, Poitiers, France
| | - Agnès Martin-Mingot
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Superacid Group - Organic Synthesis Team, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France
| | - Benoit Métayer
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Superacid Group - Organic Synthesis Team, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France.,@rtMolecule, 1 rue Georges Bonnet, Bâtiment B37, 86000, Poitiers, France
| | - Omar Karam
- @rtMolecule, 1 rue Georges Bonnet, Bâtiment B37, 86000, Poitiers, France
| | - Fabien Zunino
- @rtMolecule, 1 rue Georges Bonnet, Bâtiment B37, 86000, Poitiers, France
| | - Fodil Bouazza
- @rtMolecule, 1 rue Georges Bonnet, Bâtiment B37, 86000, Poitiers, France
| | - Sébastien Thibaudeau
- Université de Poitiers, UMR-CNRS 7285, IC2MP, Superacid Group - Organic Synthesis Team, 4 rue Michel Brunet, TSA 51106, 86073, Poitiers Cedex 9, France
| |
Collapse
|
14
|
Lingkon K, Bellizzi JJ. Structure and Activity of the Thermophilic Tryptophan-6 Halogenase BorH. Chembiochem 2019; 21:1121-1128. [PMID: 31692209 DOI: 10.1002/cbic.201900667] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Indexed: 12/19/2022]
Abstract
Flavin-dependent halogenases carry out regioselective aryl halide synthesis in aqueous solution at ambient temperature and neutral pH using benign halide salts, making them attractive catalysts for green chemistry. BorH and BorF, two proteins encoded by the biosynthetic gene cluster for the chlorinated bisindole alkaloid borregomycin A, are the halogenase and flavin reductase subunits of a tryptophan-6-halogenase. Quantitative conversion of l-tryptophan (Trp) to 6-chlorotryptophan could be achieved using 1.2 mol % BorH and 2 mol % BorF. The optimal reaction temperature for Trp chlorination is 45 °C, and the melting temperatures of BorH and BorF are 48 and 50 °C respectively, which are higher than the thermal parameters for most other halogenases previously studied. Steady-state kinetic analysis of Trp chlorination by BorH determined parameters of kcat =4.42 min-1 , and KM of 9.78 μm at 45 °C. BorH exhibits a broad substrate scope, chlorinating and brominating a variety of aromatic substrates with and without indole groups. Chlorination of Trp at a 100 mg scale with 52 % crude yield, using 0.2 mol % BorH indicates that industrial scale biotransformations using BorH/BorF are feasible. The X-ray crystal structure of BorH with bound Trp provides additional evidence for the model that regioselectivity is determined by substrate positioning in the active site, showing C6 of Trp juxtaposed with the catalytic Lys79 in the same binding pose previously observed in the structure of Thal.
Collapse
Affiliation(s)
- Kazi Lingkon
- Department of Chemistry and Biochemistry, The University of Toledo, 2801 W. Bancroft St. MS 602, Toledo, OH, 43606, USA
| | - John J Bellizzi
- Department of Chemistry and Biochemistry, The University of Toledo, 2801 W. Bancroft St. MS 602, Toledo, OH, 43606, USA
| |
Collapse
|
15
|
Markushyna Y, Smith CA, Savateev A. Organic Photocatalysis: Carbon Nitride Semiconductors vs. Molecular Catalysts. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901112] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yevheniia Markushyna
- Department of Colloid Chemistry Max‐Planck Institute of Colloids and Interfaces Research Campus Golm 14476 Potsdam Germany
| | - Christene A. Smith
- Department of Colloid Chemistry Max‐Planck Institute of Colloids and Interfaces Research Campus Golm 14476 Potsdam Germany
| | - Aleksandr Savateev
- Department of Colloid Chemistry Max‐Planck Institute of Colloids and Interfaces Research Campus Golm 14476 Potsdam Germany
| |
Collapse
|
16
|
Sorabad GS, Maddani MR. Metal‐Free, Facile Synthesis of Sulfenylated Chromones and Indoles Promoted by an Aqueous HBr−DMSO System. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900402] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
17
|
Narobe R, Düsel SJS, Iskra J, König B. Photocatalytic Oxidative Iodination of Electron‐Rich Arenes. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900298] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Rok Narobe
- Institut für Organische Chemie Universität Regensburg Universitätsstraße 31 Germany
- Faculty of Chemistry and Chemical Technology University of Ljubljana Večna pot 113 Slovenia
| | - Simon J. S. Düsel
- Institut für Organische Chemie Universität Regensburg Universitätsstraße 31 Germany
| | - Jernej Iskra
- Faculty of Chemistry and Chemical Technology University of Ljubljana Večna pot 113 Slovenia
| | - Burkhard König
- Institut für Organische Chemie Universität Regensburg Universitätsstraße 31 Germany
| |
Collapse
|
18
|
Cheng X, Shan J, Tian X, Ren YL, Zhu Y. Benzylation of Arenes with Benzyl Halides under Promoter-Free and Additive-Free Conditions. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Xinqiang Cheng
- School of Chemical Engineering & Pharmaceutics; Henan University of Science and Technology; Luoyang 471003 Henan P. R. China
| | - Jiankai Shan
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 Henan Province P.R. China
| | - Xinshe Tian
- School of Chemical Engineering & Pharmaceutics; Henan University of Science and Technology; Luoyang 471003 Henan P. R. China
| | - Yun-Lai Ren
- School of Chemical Engineering & Pharmaceutics; Henan University of Science and Technology; Luoyang 471003 Henan P. R. China
| | - Yanyan Zhu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou 450001 Henan Province P.R. China
| |
Collapse
|
19
|
Singh H, Sen C, Sahoo T, Ghosh SC. A Visible Light-Mediated Regioselective Halogenation of Anilides and Quinolines by Using a Heterogeneous Cu-MnO Catalyst. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801097] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Harshvardhan Singh
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| | - Chiranjit Sen
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| | - Tapan Sahoo
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| | - Subhash Chandra Ghosh
- Natural Products and Green Chemistry Division; CSIR-Central Salt and Marine Chemicals Research Institute; G.B. Marg -364002 Bhavnagar Gujarat India
| |
Collapse
|
20
|
Das R, Kapur M. Transition-Metal-Catalyzed Site-Selective C−H Halogenation Reactions. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800142] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Riki Das
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhauri, Bhopal 462066 MP India
| | - Manmohan Kapur
- Department of Chemistry; Indian Institute of Science Education and Research Bhopal; Bhopal Bypass Road Bhauri, Bhopal 462066 MP India
| |
Collapse
|
21
|
Kumar Y, Jaiswal Y, Thakur R, Kumar A. A Straightforward Synthesis of α
-Amino Diaryl Ketones from (Hetero)Arylacetonitriles Promoted by N
-Bromosuccinimide. ChemistrySelect 2018. [DOI: 10.1002/slct.201801073] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yogesh Kumar
- Department of Chemistry; Indian Institute of Technology Patna; Bihta 801103 Bihar India
| | - Yogesh Jaiswal
- Department of Chemistry; Indian Institute of Technology Patna; Bihta 801103 Bihar India
| | - Rima Thakur
- Department of Chemistry; National Institute of Technology Patna; Patna- 800005 Bihar India
| | - Amit Kumar
- Department of Chemistry; Indian Institute of Technology Patna; Bihta 801103 Bihar India
| |
Collapse
|
22
|
Chan YC, Yeung YY. Halogen Bond Catalyzed Bromocarbocyclization. Angew Chem Int Ed Engl 2018; 57:3483-3487. [DOI: 10.1002/anie.201800261] [Citation(s) in RCA: 69] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Indexed: 01/13/2023]
Affiliation(s)
- Yuk-Cheung Chan
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| | - Ying-Yeung Yeung
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| |
Collapse
|
23
|
Affiliation(s)
- Yuk-Cheung Chan
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| | - Ying-Yeung Yeung
- Department of Chemistry; The Chinese University of Hong Kong, Shatin, N.T.; Hong Kong China
| |
Collapse
|
24
|
Li G, Dilger AK, Cheng PT, Ewing WR, Groves JT. Selective C−H Halogenation with a Highly Fluorinated Manganese Porphyrin. Angew Chem Int Ed Engl 2017; 57:1251-1255. [DOI: 10.1002/anie.201710676] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Gang Li
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | | | - Peter T. Cheng
- Bristol-Myers Squibb P. O. Box 5400 Princeton NJ 08543-5400 USA
| | | | - John T. Groves
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| |
Collapse
|
25
|
Li G, Dilger AK, Cheng PT, Ewing WR, Groves JT. Selective C−H Halogenation with a Highly Fluorinated Manganese Porphyrin. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710676] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Gang Li
- Department of Chemistry; Princeton University; Princeton NJ 08544 USA
| | - Andrew K. Dilger
- Bristol-Myers Squibb; P. O. Box 5400 Princeton NJ 08543-5400 USA
| | - Peter T. Cheng
- Bristol-Myers Squibb; P. O. Box 5400 Princeton NJ 08543-5400 USA
| | - William R. Ewing
- Bristol-Myers Squibb; P. O. Box 5400 Princeton NJ 08543-5400 USA
| | - John T. Groves
- Department of Chemistry; Princeton University; Princeton NJ 08544 USA
| |
Collapse
|
26
|
Andorfer MC, Belsare KD, Girlich AM, Lewis JC. Aromatic Halogenation by Using Bifunctional Flavin Reductase-Halogenase Fusion Enzymes. Chembiochem 2017; 18:2099-2103. [PMID: 28879681 PMCID: PMC5898195 DOI: 10.1002/cbic.201700391] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Indexed: 11/11/2022]
Abstract
The remarkable site selectivity and broad substrate scope of flavin-dependent halogenases (FDHs) has led to much interest in their potential as biocatalysts. Multiple engineering efforts have demonstrated that FDHs can be tuned for non-native substrate scope and site selectivity. FDHs have also proven useful as in vivo biocatalysts and have been successfully incorporated into biosynthetic pathways to build new chlorinated aromatic compounds in several heterologous organisms. In both cases, reduced flavin cofactor, usually supplied by a separate flavin reductase (FR), is required. Herein, we report functional synthetic, fused FDH-FR proteins containing various FDHs and FRs joined by different linkers. We show that FDH-FR fusion proteins can increase product titers compared to the individual components for in vivo biocatalysis in Escherichia coli.
Collapse
Affiliation(s)
- Mary C Andorfer
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, SCL 302, Chicago, IL, 60637, USA
| | - Ketaki D Belsare
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, SCL 302, Chicago, IL, 60637, USA
| | - Anna M Girlich
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, SCL 302, Chicago, IL, 60637, USA
| | - Jared C Lewis
- Department of Chemistry, University of Chicago, 5735 South Ellis Avenue, SCL 302, Chicago, IL, 60637, USA
| |
Collapse
|
27
|
Možina Š, Stavber S, Iskra J. Dual Catalysis for the Aerobic Oxidation of Benzyl Alcohols - Nitric Acid and Fluorinated Alcohol. European J Org Chem 2016. [DOI: 10.1002/ejoc.201601339] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Štefan Možina
- Centre of Excellence for Integrated Approaches in Chemistry and Biology of Proteins; Jamova cesta 39 1000 Ljubljana Slovenia
- Jožef Stefan International Postgraduate School; Jamova cesta 39 1000 Ljubljana Slovenia
| | - Stojan Stavber
- Department of Physical and Organic Chemistry; Jožef Stefan Institute; Jamova cesta 39 1000 Ljubljana Slovenia
- Centre of Excellence for Integrated Approaches in Chemistry and Biology of Proteins; Jamova cesta 39 1000 Ljubljana Slovenia
| | - Jernej Iskra
- Department of Physical and Organic Chemistry; Jožef Stefan Institute; Jamova cesta 39 1000 Ljubljana Slovenia
- Faculty of Chemistry and Chemical Technology; University of Ljubljana; Večna pot 113 1000 Ljubljana Slovenia
| |
Collapse
|
28
|
Li L, Ding S, Yang Y, Zhu A, Fan X, Cui M, Chen C, Zhang G. Multicomponent Aqueous Synthesis of Iodo-1,2,3-triazoles: Single-Step Models for Dual Modification of Free Peptide and Radioactive Iodo Labeling. Chemistry 2016; 23:1166-1172. [DOI: 10.1002/chem.201605034] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Lingjun Li
- Collaborative Innovation Center of Henan Province for Green; Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical; Media and Reactions, Ministry of Education; School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan 453007 P.R. China
| | - Shengqiang Ding
- Collaborative Innovation Center of Henan Province for Green; Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical; Media and Reactions, Ministry of Education; School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan 453007 P.R. China
| | - Yanping Yang
- Key Laboratory of Radiopharmaceuticals, Ministry of Education; College of Chemistry; Beijing Normal University; Beijing 100875 P.R. China
| | - Anlian Zhu
- Collaborative Innovation Center of Henan Province for Green; Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical; Media and Reactions, Ministry of Education; School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan 453007 P.R. China
| | - Xincui Fan
- Collaborative Innovation Center of Henan Province for Green; Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical; Media and Reactions, Ministry of Education; School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan 453007 P.R. China
| | - Mengchao Cui
- Key Laboratory of Radiopharmaceuticals, Ministry of Education; College of Chemistry; Beijing Normal University; Beijing 100875 P.R. China
| | - Changpo Chen
- Collaborative Innovation Center of Henan Province for Green; Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical; Media and Reactions, Ministry of Education; School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan 453007 P.R. China
| | - Guisheng Zhang
- Collaborative Innovation Center of Henan Province for Green; Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical; Media and Reactions, Ministry of Education; School of Chemistry and Chemical Engineering; Henan Normal University; Xinxiang Henan 453007 P.R. China
| |
Collapse
|
29
|
Moriyama K, Nishinohara C, Togo H. Magnesium Lewis Acid Assisted Oxidative Bromoetherification Involving Bromine Transfer from Alkyl Bromides with Aldehydes by Umpolung of Bromide. Chemistry 2016; 22:11934-9. [PMID: 27304660 DOI: 10.1002/chem.201602055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Indexed: 11/11/2022]
Abstract
An oxidative bromoetherification involving a bromine transfer from alkyl bromides upon reacting them with aldehydes in a Grignard reaction with a concurrent oxidation of bromide was developed to provide substituted tetrahydrofurans in high yields. This reaction, which proceeds through two types of bromine transfer, was promoted by the addition of a Brønsted acid. Mechanistic studies suggested that a magnesium Lewis acid activates hypobromate, which is generated in situ from the reaction of bromide and Oxone to improve the electrophilicity of the bromonium ion (Br(+) ) for the oxidative bromoetherification of alkenyl alcohols. Furthermore, the magnesium Lewis acid catalyzed oxidative bromoetherification of an alkenyl alcohol proceeded to provide a cyclization product in 92 % yield.
Collapse
Affiliation(s)
- Katsuhiko Moriyama
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan. .,Molecular Chirality Research Center, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| | - Chihiro Nishinohara
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan
| | - Hideo Togo
- Department of Chemistry, Graduate School of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba, 263-8522, Japan.
| |
Collapse
|
30
|
Liu J, Chen G, Tan Z. Copper-Catalyzed or -Mediated CH Bond Functionalizations Assisted by Bidentate Directing Groups. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600031] [Citation(s) in RCA: 195] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
31
|
Hering T, Mühldorf B, Wolf R, König B. Halogenase-inspirierte oxidative Chlorierung mittels Flavin- Photokatalyse. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201600783] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Thea Hering
- Universität Regensburg; Fakultät für Chemie und Pharmazie; 93040 Regensburg Deutschland
| | - Bernd Mühldorf
- Universität Regensburg; Fakultät für Chemie und Pharmazie; 93040 Regensburg Deutschland
| | - Robert Wolf
- Universität Regensburg; Fakultät für Chemie und Pharmazie; 93040 Regensburg Deutschland
| | - Burkhard König
- Universität Regensburg; Fakultät für Chemie und Pharmazie; 93040 Regensburg Deutschland
| |
Collapse
|
32
|
Hering T, Mühldorf B, Wolf R, König B. Halogenase-Inspired Oxidative Chlorination Using Flavin Photocatalysis. Angew Chem Int Ed Engl 2016; 55:5342-5. [PMID: 26991557 PMCID: PMC5069574 DOI: 10.1002/anie.201600783] [Citation(s) in RCA: 100] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Revised: 01/23/2016] [Indexed: 11/22/2022]
Abstract
Chlorine gas or electropositive chlorine reagents are used to prepare chlorinated aromatic compounds, which are found in pharmaceuticals, agrochemicals, and polymers, and serve as synthetic precursors for metal‐catalyzed cross‐couplings. Nature chlorinates with chloride anions, FAD‐dependent halogenases, and O2 as the oxidant. A photocatalytic oxidative chlorination is described based on the organic dye riboflavin tetraacetate mimicking the enzymatic process. The chemical process allows within the suitable arene redox potential window a broader substrate scope compared to the specific activation in the enzymatic binding pocket.
Collapse
Affiliation(s)
- Thea Hering
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany
| | - Bernd Mühldorf
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany
| | - Robert Wolf
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany.
| | - Burkhard König
- Universität Regensburg, Fakultät für Chemie und Pharmazie, 93040, Regensburg, Germany.
| |
Collapse
|
33
|
Wudarczyk J, Papamokos G, Margaritis V, Schollmeyer D, Hinkel F, Baumgarten M, Floudas G, Müllen K. Hexasubstituted Benzenes with Ultrastrong Dipole Moments. Angew Chem Int Ed Engl 2016; 55:3220-3. [DOI: 10.1002/anie.201508249] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 11/26/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Jakob Wudarczyk
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Germany
| | - George Papamokos
- Department of Physics; University of Ioannina; 451 10 Ioannina Greece
| | | | - Dieter Schollmeyer
- Institute für Organische Chemie; Johannes-Gutenberg Universität Mainz; 55128 Mainz Germany
| | - Felix Hinkel
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Germany
| | - Martin Baumgarten
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Germany
| | - George Floudas
- Department of Physics; University of Ioannina; 451 10 Ioannina Greece
| | - Klaus Müllen
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Germany
| |
Collapse
|
34
|
Wudarczyk J, Papamokos G, Margaritis V, Schollmeyer D, Hinkel F, Baumgarten M, Floudas G, Müllen K. Hexasubstituierte Benzolderivate mit ultrastarken Dipolmomenten. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201508249] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jakob Wudarczyk
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - George Papamokos
- Department of Physics; University of Ioannina; 451 10 Ioannina Griechenland
| | - Vasilis Margaritis
- Department of Physics; University of Ioannina; 451 10 Ioannina Griechenland
| | - Dieter Schollmeyer
- Institut für Organische Chemie; Johannes Gutenberg-Universität Mainz; 55128 Mainz Deutschland
| | - Felix Hinkel
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - Martin Baumgarten
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| | - George Floudas
- Department of Physics; University of Ioannina; 451 10 Ioannina Griechenland
| | - Klaus Müllen
- Max-Planck-Institut für Polymerforschung; Ackermannweg 10 55128 Mainz Deutschland
| |
Collapse
|
35
|
Badetti E, Romano F, Marchiò L, Taşkesenlioğlu S, Daştan A, Zonta C, Licini G. Effective bromo and chloro peroxidation catalysed by tungsten(vi) amino triphenolate complexes. Dalton Trans 2016; 45:14603-8. [DOI: 10.1039/c6dt01780k] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amino triphenolate tungsten(vi) complexes have been prepared and they proved to be efficient catalysts in haloperoxidation reactions using hydrogen peroxide as a terminal oxidant and inorganic sources of halides.
Collapse
Affiliation(s)
- Elena Badetti
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| | - Francesco Romano
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| | - Luciano Marchiò
- Dipartimento di Chimica
- Università degli Studi di Parma
- 43123 Parma
- Italy
| | - Sara Taşkesenlioğlu
- Ağrı İbrahim Çeçen University
- Faculty of Arts and Science
- Department of Chemistry
- Agri
- Turkey
| | - Arif Daştan
- Faculty of Science
- Department of Chemistry
- Ataturk University
- Erzurum
- Turkey
| | - Cristiano Zonta
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| | - Giulia Licini
- Dipartimento di Scienze Chimiche
- Università di Padova and CIRCC
- Padova Unit
- 35131 Padova
- Italy
| |
Collapse
|
36
|
Liu J, Zhang X, Peng H, Jiang H, Yin B. Copper Chloride-Catalyzed Aerobic Oxidative Annulation ofN-Furfuryl-β-Enaminones:Access to Polysubstituted Pyrroles and Indoles. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
37
|
Claes L, Matthessen R, Rombouts I, Stassen I, De Baerdemaeker T, Depla D, Delcour JA, Lagrain B, De Vos DE. Bio-based nitriles from the heterogeneously catalyzed oxidative decarboxylation of amino acids. CHEMSUSCHEM 2015; 8:345-352. [PMID: 25470619 DOI: 10.1002/cssc.201402801] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 10/21/2014] [Indexed: 06/04/2023]
Abstract
The oxidative decarboxylation of amino acids to nitriles was achieved in aqueous solution by in situ halide oxidation using catalytic amounts of tungstate exchanged on a [Ni,Al] layered double hydroxide (LDH), NH4 Br, and H2 O2 as the terminal oxidant. Both halide oxidation and oxidative decarboxylation were facilitated by proximity effects between the reactants and the LDH catalyst. A wide range of amino acids was converted with high yields, often >90 %. The nitrile selectivity was excellent, and the system is compatible with amide, alcohol, and in particular carboxylic acid, amine, and guanidine functional groups after appropriate neutralization. This heterogeneous catalytic system was applied successfully to convert a protein-rich byproduct from the starch industry into useful bio-based N-containing chemicals.
Collapse
Affiliation(s)
- Laurens Claes
- Centre for Surface Chemistry and Catalysis, Department of Microbial and Molecular Systems, KU Leuven, Kasteelpark Arenberg 23, 3001 Heverlee (Belgium)
| | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Zhang P, Hong L, Li G, Wang R. Sodium Halides as Halogenating Reagents: Rhodium(III)-Catalyzed Versatile and Practical Halogenation of Aryl Compounds. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400590] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
|
39
|
Liu S, Chen J, Zhang R, Zhao F, Deng GJ. Palladium-Catalyzed Desulfinative Iodination of Sodium Sulfinates and Sulfonyl Hydrazides. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402140] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
40
|
Poor CB, Andorfer MC, Lewis JC. Improving the stability and catalyst lifetime of the halogenase RebH by directed evolution. Chembiochem 2014; 15:1286-9. [PMID: 24849696 PMCID: PMC4124618 DOI: 10.1002/cbic.201300780] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Indexed: 11/09/2022]
Abstract
We previously reported that the halogenase RebH catalyzes selective halogenation of several heterocycles and carbocycles, but product yields were limited by enzyme instability. Here, we use directed evolution to engineer an RebH variant, 3-LR, with a Topt over 5 °C higher than that of wild-type, and 3-LSR, with a Tm 18 °C higher than that of wild-type. These enzymes provided significantly improved conversion (up to fourfold) for halogenation of tryptophan and several non-natural substrates. This initial evolution of RebH not only provides improved enzymes for immediate synthetic applications, but also establishes a robust protocol for further halogenase evolution.
Collapse
Affiliation(s)
| | | | - Jared C. Lewis
- Department of Chemistry, University of Chicago, 5735 S. Ellis Ave., Chicago, IL 60637, USA
| |
Collapse
|
41
|
Prebil R, Stavber S. The α-Chlorination of Aryl Methyl Ketones under Aerobic Oxidative Conditions. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201301012] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
42
|
Mal K, Sharma A, Maulik PR, Das I. PPh(3)·HBr-DMSO mediated expedient synthesis of γ-substituted β,γ-unsaturated α-ketomethylthioesters and α-bromo enals: application to the synthesis of 2-methylsulfanyl-3(2H)-furanones. Chemistry 2013; 20:662-7. [PMID: 24339245 DOI: 10.1002/chem.201303755] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 10/28/2013] [Indexed: 11/07/2022]
Abstract
An efficient chemoselective general procedure for the synthesis of γ-substituted β,γ-unsaturated α-ketomethylthioesters from α,β-unsaturated ketones has been achieved through an unprecedented PPh3 ⋅HBr-DMSO mediated oxidative bromination and Kornblum oxidation sequence. The newly developed reagent system serves admirably for the synthesis of α-bromoenals from enals. Furthermore, AuCl3 -catalyzed efficient access to 3(2H)-furanones from the above intermediates under extremely mild conditions are described.
Collapse
Affiliation(s)
- Kanchan Mal
- Chemistry Division, CSIR-Indian Institute of Chemical Biology, 4, Raja S. C. Mullick Road, Jadavpur, Kolkata 700 032 (India), Fax: (+91) 33-2473-5197
| | | | | | | |
Collapse
|
43
|
Ren YL, Shang H, Wang J, Tian X, Zhao S, Wang Q, Li F. Nitrogen Dioxide-Catalyzed Electrophilic Iodination of Arenes. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300581] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
44
|
Kee CW, Chan KM, Wong MW, Tan CH. Selective Bromination of sp3CH Bonds by Organophotoredox Catalysis. ASIAN J ORG CHEM 2013. [DOI: 10.1002/ajoc.201300169] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
45
|
Huang Z, Li F, Chen B, Lu T, Yuan Y, Yuan G. A sustainable process for catalytic oxidative bromination with molecular oxygen. CHEMSUSCHEM 2013; 6:1337-1340. [PMID: 23776057 DOI: 10.1002/cssc.201300289] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 05/04/2013] [Indexed: 06/02/2023]
Affiliation(s)
- Zhijun Huang
- Beijing National Laboratory of Molecular Science, Laboratory of New Materials, Institute of Chemistry, Chinese Academy of Sciences, Beijing, PR China
| | | | | | | | | | | |
Collapse
|
46
|
Bedrač L, Iskra J. Iodine(I) Reagents in Hydrochloric Acid-Catalyzed Oxidative Iodination of Aromatic Compounds by Hydrogen Peroxide and Iodine. Adv Synth Catal 2013. [DOI: 10.1002/adsc.201300127] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
47
|
Payne JT, Andorfer MC, Lewis JC. Regioselective Arene Halogenation using the FAD-Dependent Halogenase RebH. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300762] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
48
|
Payne JT, Andorfer MC, Lewis JC. Regioselective arene halogenation using the FAD-dependent halogenase RebH. Angew Chem Int Ed Engl 2013; 52:5271-4. [PMID: 23592388 DOI: 10.1002/anie.201300762] [Citation(s) in RCA: 114] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2013] [Indexed: 11/07/2022]
Affiliation(s)
- James T Payne
- Department of Chemistry, University of Chicago, 5735 S. Ellis Ave., Chicago, IL 60637, USA
| | | | | |
Collapse
|
49
|
|
50
|
Zhang P, Sun D, Wen M, Yang J, Zhou K, Wang Z. Hydroxyl Radical Promotes the Direct Iodination of Aromatic Compounds with Iodine in Water: A Combined Experimental and Theoretical Study. Adv Synth Catal 2012. [DOI: 10.1002/adsc.201100765] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|