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Nicholls TP, Williams JR, Willans CE. Reactivities of N-heterocyclic carbenes at metal centers. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2021. [DOI: 10.1016/bs.adomc.2021.01.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Sultane PR, Ahumada G, Janssen‐Müller D, Bielawski CW. Cyclic (Aryl)(Amido)Carbenes: NHCs with Triplet‐like Reactivity. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910350] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Prakash R. Sultane
- Center for Multidimensional Carbon Materials (CMCM)Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
| | - Guillermo Ahumada
- Center for Multidimensional Carbon Materials (CMCM)Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
| | - Daniel Janssen‐Müller
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Münster Münster 48149 Germany
| | - Christopher W. Bielawski
- Center for Multidimensional Carbon Materials (CMCM)Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department Chemistry and Department of Energy EngineeringUlsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
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Sultane PR, Ahumada G, Janssen‐Müller D, Bielawski CW. Cyclic (Aryl)(Amido)Carbenes: NHCs with Triplet‐like Reactivity. Angew Chem Int Ed Engl 2019; 58:16320-16325. [DOI: 10.1002/anie.201910350] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Indexed: 11/05/2022]
Affiliation(s)
- Prakash R. Sultane
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
| | - Guillermo Ahumada
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
| | - Daniel Janssen‐Müller
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Münster 48149 Germany
| | - Christopher W. Bielawski
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department Chemistry and Department of Energy Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
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Malan FP, Singleton E, van Rooyen PH, Landman M. Tandem transfer hydrogenation–epoxidation of ketone substrates catalysed by alkene-tethered Ru( ii)–NHC complexes. NEW J CHEM 2019. [DOI: 10.1039/c9nj01220f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eight novel alkene-tethered Ru(ii)–NHC complexes were employed as catalysts in tandem transfer hydrogenation–epoxidation reactions using phenacyl bromide derivatives as substrates.
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Affiliation(s)
| | - Eric Singleton
- Department of Chemistry
- University of Pretoria
- Hatfield
- South Africa
| | | | - Marilé Landman
- Department of Chemistry
- University of Pretoria
- Hatfield
- South Africa
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Jawiczuk M, Janaszkiewicz A, Trzaskowski B. The influence of the cationic carbenes on the initiation kinetics of ruthenium-based metathesis catalysts; a DFT study. Beilstein J Org Chem 2018; 14:2872-2880. [PMID: 30546471 PMCID: PMC6278762 DOI: 10.3762/bjoc.14.266] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 11/01/2018] [Indexed: 11/30/2022] Open
Abstract
Cationic carbenes are a relatively new and rare group of ancillary ligands, which have shown their superior activity in a number of challenging catalytic reactions. In ruthenium-based metathesis catalysis they are often used as ammonium tags, to provide water-soluble, environment-friendly catalysts. In this work we performed computational studies on three cationic carbenes with the formal positive charge located at different distances from the carbene carbon. We show that the predicted initiation rates of Grubbs, indenylidene, and Hoveyda–Grubbs-like complexes incorporating these carbenes show little variance and are similar to initiation rates of standard Grubbs, indenylidene, and Hoveyda–Grubbs catalysts. In all investigated cases the partial charge of the carbene carbon atom is similar, resulting in comparable Ccarbene–Ru bond strengths and Ru–P/O dissociation Gibbs free energies.
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Affiliation(s)
- Magdalena Jawiczuk
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
| | | | - Bartosz Trzaskowski
- Centre of New Technologies, University of Warsaw, Banacha 2c, 02-097 Warszawa, Poland
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Vanicek S, Podewitz M, Stubbe J, Schulze D, Kopacka H, Wurst K, Müller T, Lippmann P, Haslinger S, Schottenberger H, Liedl KR, Ott I, Sarkar B, Bildstein B. Highly Electrophilic, Catalytically Active and Redox-Responsive Cobaltoceniumyl and Ferrocenyl Triazolylidene Coinage Metal Complexes. Chemistry 2018; 24:3742-3753. [PMID: 29214677 PMCID: PMC6100101 DOI: 10.1002/chem.201705051] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Indexed: 01/16/2023]
Abstract
A convenient access to a triad of triazoles with ferrocenyl and cobaltoceniumyl substituents is reported. N-Alkylation, deprotonation and metalation with CuI /AgI /AuI synthons affords the heteroleptic triazolylidene complexes. Due to the combination of neutral, electron-donating ferrocenyl substituents and cationic, strongly electron-withdrawing cobaltocenium substituents, the mesoionic carbene (MIC) ligands of these complexes are electronically interesting "push-pull", "pull-push" and "pull-pull" metalloligands with further switchable redox states based on their fully reversible FeII /FeIII , (ferrocene/ferrocenium) and CoIII /CoII , (cobaltocenium/cobaltocene) redox couples. These are the first examples of metal complexes of (di)cationic NHC ligands based on cobaltoceniumyl substituents. DFT calculated Tolman electronic parameter (TEP) of the new MIC ligands, show these metalloligands to be extremely electron-poor NHCs with properties unmatched in other carbene chemistry. Utilization of these multimetallic electronically tunable compounds in catalytic oxazoline synthesis and in antitumor studies are presented. Remarkably, 1 mol % of the AuI complex with the dicationic MIC ligand displays full catalytic conversion, without the need for any other additives, in less than 2 hours at ambient temperatures. These results thus firmly establish these new classes of cobaltoceniumyl based (di)cationic MIC ligands as prominent players in several branches of chemistry.
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Affiliation(s)
- Stefan Vanicek
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Jessica Stubbe
- Institute of Chemistry and Biochemistry, Inorganic ChemistryFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Dennis Schulze
- Institute of Chemistry and Biochemistry, Inorganic ChemistryFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Holger Kopacka
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Thomas Müller
- Institute of Organic ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Petra Lippmann
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBeethovenstr. 5538106BraunschweigGermany
| | - Simone Haslinger
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Herwig Schottenberger
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Klaus R. Liedl
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
| | - Ingo Ott
- Institute of Medicinal and Pharmaceutical ChemistryTechnische Universität BraunschweigBeethovenstr. 5538106BraunschweigGermany
| | - Biprajit Sarkar
- Institute of Chemistry and Biochemistry, Inorganic ChemistryFreie Universität BerlinFabeckstraße 34–3614195BerlinGermany
| | - Benno Bildstein
- Institute of General, Inorganic and Theoretical ChemistryUniversity of Innsbruck, Center for Chemistry and BiomedicineInnrain 80–826020InnsbruckAustria
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Iglesias-Sigüenza J, Izquierdo C, Díez E, Fernández R, Lassaletta JM. N-Heterotricyclic cationic carbene ligands. Synthesis, reactivity and coordination chemistry. Dalton Trans 2018. [PMID: 29528072 DOI: 10.1039/c8dt00213d] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Metal complexes based on cationic N-heterotricyclic carbenes have been synthesized and the impact of charge delocalization on their electronic properties has been analysed.
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Affiliation(s)
- Javier Iglesias-Sigüenza
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - Cristina Izquierdo
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - Elena Díez
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - Rosario Fernández
- Departamento de Química Orgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41012 Sevilla
- Spain
| | - José M. Lassaletta
- Instituto Investigaciones Químicas (CSIC-USe) and Centro de Innovación en Química Avanzada (ORFEO-CINQA)
- 41092 Sevilla
- Spain
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Affiliation(s)
- Mirko Ruamps
- LCC-CNRS, Université de Toulouse, INPT, UPS, 205 route de Narbonne, 31077 Toulouse cedex 4, France
| | - Noël Lugan
- LCC-CNRS, Université de Toulouse, INPT, UPS, 205 route de Narbonne, 31077 Toulouse cedex 4, France
| | - Vincent César
- LCC-CNRS, Université de Toulouse, INPT, UPS, 205 route de Narbonne, 31077 Toulouse cedex 4, France
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Abstract
It is well-recognized that N-heterocyclic carbene (NHC) ligands have provided a new dimension to the design of homogeneous catalysts. Part of the success of this type of ligands resides in the limitless access to a variety of topologies with tuned electronic properties, but also in the ability of a family of NHCs that are able to adapt their properties to the specific requirements of individual catalytic transformations. The term "smart" is used here to refer to switchable, multifunctional, adaptable, or tunable ligands and, in general, to all those ligands that are able to modify their steric or electronic properties to fulfill the requirements of a defined catalytic reaction. The purpose of this review is to comprehensively describe all types of smart NHC ligands by focusing attention on the catalytically relevant ligand-based reactivity.
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Affiliation(s)
- Eduardo Peris
- Institute of Advanced Materials , Universitat Jaume I , Avenida Vicente Sos Baynat s/n , Castellón E-12071 , Spain
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Schwedtmann K, Schoemaker R, Hennersdorf F, Bauzá A, Frontera A, Weiss R, Weigand JJ. Cationic 5-phosphonio-substituted N-heterocyclic carbenes. Dalton Trans 2016; 45:11384-96. [DOI: 10.1039/c6dt01871h] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Cationic NHCs featuring a phosphonium moiety in the 5-position are prepared from the reaction of imidazolium salts with a tert. phosphane. They are used as ligands for the preparation of transition metal complexes, dehydrogenation reactions of prim. and sec. phosphanes and the preparation of a N-heterocyclic olefin (NHO).
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Affiliation(s)
- Kai Schwedtmann
- Department of Chemistry and Food Chemistry
- TU Dresden
- 01062 Dresden
- Germany
| | - Robin Schoemaker
- Department of Chemistry and Food Chemistry
- TU Dresden
- 01062 Dresden
- Germany
| | - Felix Hennersdorf
- Department of Chemistry and Food Chemistry
- TU Dresden
- 01062 Dresden
- Germany
| | - Antonio Bauzá
- Department of Chemistry
- Universitat de les Illes Balears
- Palma de Mallorca
- Spain
| | - Antonio Frontera
- Department of Chemistry
- Universitat de les Illes Balears
- Palma de Mallorca
- Spain
| | - Robert Weiss
- Department of Chemistry and Pharmacy
- Friedrich-Alexander-Universität Erlangen
- 91054 Erlangen
- Germany
| | - Jan J. Weigand
- Department of Chemistry and Food Chemistry
- TU Dresden
- 01062 Dresden
- Germany
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Collins LR, Riddlestone IM, Mahon MF, Whittlesey MK. A Comparison of the Stability and Reactivity of Diamido‐ and Diaminocarbene Copper Alkoxide and Hydride Complexes. Chemistry 2015; 21:14075-84. [DOI: 10.1002/chem.201502476] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 02/05/2023]
Affiliation(s)
- Lee R. Collins
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY (UK), Fax: (+44) 1225‐386‐231
| | - Ian M. Riddlestone
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY (UK), Fax: (+44) 1225‐386‐231
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY (UK), Fax: (+44) 1225‐386‐231
| | - Michael K. Whittlesey
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY (UK), Fax: (+44) 1225‐386‐231
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Ruiz J, Mesa AF. From Diphosphino-Functionalized 1,3-Dialkylimidazolium Cations to Imidazolones through Dehydrogenative CN Coupling. Chemistry 2013; 20:102-5. [DOI: 10.1002/chem.201303773] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Indexed: 11/10/2022]
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Makhloufi A, Wahl M, Frank W, Ganter C. A New Mixed Amino–Amido N-Heterocyclic Carbene Based on Anthranilic Acid. Organometallics 2013. [DOI: 10.1021/om301152n] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Abdelaziz Makhloufi
- Institut
für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225
Düsseldorf, Germany
| | - Michaela Wahl
- Institut
für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225
Düsseldorf, Germany
| | - Walter Frank
- Institut
für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225
Düsseldorf, Germany
| | - Christian Ganter
- Institut
für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, D-40225
Düsseldorf, Germany
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Buhl H, Ganter C. Tuning the electronic properties of an N-heterocyclic carbene by charge and mesomeric effects. Chem Commun (Camb) 2013; 49:5417-9. [DOI: 10.1039/c3cc42547a] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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