1
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Babula DJ, Charman RSC, Hobson JA, Mahon MF, Liptrot DJ. Dial-a-base mechanochemical synthesis of N-heterocyclic carbene copper complexes. Dalton Trans 2024; 53:3990-3993. [PMID: 38372037 DOI: 10.1039/d4dt00334a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
Liquid assisted ball milling of [NHC]HBr (NHC = N-heterocyclic carbene) salts with copper(I) chloride, and a range of alkali metal complexes was shown to efficiently produce (NHC)CuX (NHC = normal or RE-NHC, X = halide, alkoxide, amide, alkyl, aryl; RE-NHC = ring-expanded NHC).
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Affiliation(s)
- Dawid J Babula
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
- Institute for Sustainability, University of Bath, Bath, BA2 7AY, UK
| | - Rex S C Charman
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | - Josie A Hobson
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | - David J Liptrot
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
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2
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Charman RSC, Hobson JA, Jackson RA, Mahon MF, Neale SE, Liptrot DJ. Acyclic Boryl Complexes of Copper(I). Chemistry 2024; 30:e202302704. [PMID: 37818674 DOI: 10.1002/chem.202302704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 10/10/2023] [Accepted: 10/11/2023] [Indexed: 10/12/2023]
Abstract
Reaction of (6-Dipp)CuOtBu (6-Dipp=C{NDippCH2 }2 CH2 , Dipp=2,6-iPr2 C6 H3 ) with B2 (OMe)4 provided access to (6-Dipp)CuB(OMe)2 via σ-bond metathesis. (6-Dipp)CuB(OMe)2 was characterised by NMR spectroscopy and X-ray crystallography and shown to be a monomeric acyclic boryl of copper. (6-Dipp)CuB(OMe)2 reacted with ethylene and diphenylacetylene to provide insertion compounds into the Cu-B bond which were characterised by NMR spectroscopy in both cases and X-ray crystallography in the latter. It was also competent in the rapid catalytic deoxygenation of CO2 in the presence of excess B2 (OMe)4 . Alongside π-insertion, (6-Dipp)CuB(OMe)2 reacted with LiNMe2 to provide a salt metathesis reaction at boron, giving (6-Dipp)CuB(OMe)NMe2 , a second monomeric acyclic boryl, which also cuproborated diphenylacetylene. Computational interrogation validated these acyclic boryl species to be electronically similar to (6-Dipp)CuBpin.
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Affiliation(s)
- Rex S C Charman
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Josie A Hobson
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Ross A Jackson
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - Samuel E Neale
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
| | - David J Liptrot
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, UK
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3
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Grasruck A, Parla G, Lou L, Langer J, Neiß C, Herrera A, Frieß S, Görling A, Schmid G, Dorta R. Trapping of soluble, KCl-stabilized Cu(I) hydrides with CO 2 gives crystalline formates. Chem Commun (Camb) 2023; 59:13879-13882. [PMID: 37933531 DOI: 10.1039/d3cc03033d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2023]
Abstract
Cu(I)-Hydrido complexes supported by dibenzo[b,f]azepinyl P-alkene hybrid ligands and stabilized by electrostatic interactions in a Cu-H⋯KCl⋯BR3 arrangement can be trapped with CO2 at low temperature to afford Cu(I)-formates. The complexes are isolable with and without a pendant BEt3 group and show strong Cu-O and weak B-O interactions.
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Affiliation(s)
- Alexander Grasruck
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Giorgio Parla
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Lisha Lou
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Jens Langer
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Christian Neiß
- Department Chemie und Pharmazie, Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Alberto Herrera
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Sybille Frieß
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
| | - Andreas Görling
- Department Chemie und Pharmazie, Theoretische Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 3, 91058 Erlangen, Germany
| | - Günter Schmid
- Siemens Energy Global GmbH & Co. KG, New Energy Business - Technology & Products, Freyeslebenstraße 1, 91058 Erlangen, Germany
| | - Romano Dorta
- Department Chemie und Pharmazie, Anorganische und Allgemeine Chemie, Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstraße 1, 91058 Erlangen, Germany.
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4
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Hussein AA, Ariffin A. Remote Steric and Electronic Effects of N-Heterocyclic Carbene Ligands on Alkene Reactivity and Regioselectivity toward Hydrocupration Reactions: The Role of Expanded-Ring N-Heterocyclic Carbenes. J Org Chem 2023; 88:13009-13021. [PMID: 37649423 DOI: 10.1021/acs.joc.3c01121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
Abstract
The remote groups in N-heterocyclic carbene (NHC) ligands have a significant influence on metal-catalyzed reactions. We examine how remote bulkiness, electronic groups, and expanded-ring NHCs (ER-NHCs) influence alkene reactivity and regioselectivity toward hydrocupration using density functional theory calculations. The impact of remote steric bulkiness on the Cu-H insertion rate is analyzed, revealing a strong correlation between the steric substituent constant and rate ratio, where a bulky group increases the rate due to reduced steric effects in the transition state (TS). The steric properties of the examined catalysts (with a remote group R2 = CPh3, CHPh2, CH2Ph, CH3, and H) and their corresponding TSs are found to be modulated greatly by the remote steric substitution group and the ring size of the NHC ligand. Enhanced bulkiness enhances the nucleophilic Cu-H moiety. The remote electronic groups have a smaller impact on insertion barrier compared to that of steric hindrance. Furthermore, ER-NHC exploration indicates that NHCs with over five-membered rings have a significantly negative influence on the reaction rate. Finally, with a highly bulky group (R2 = CPh3), anti-Markovnikov insertion preference is attributed to high interaction energy and improved steric properties. Overall, our findings here provide valuable insights for the development of a more effective catalyst in metal-catalyzed reactions.
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Affiliation(s)
- Aqeel A Hussein
- Department of Medical Laboratory Science, College of Science, Komar University of Science and Technology, Sulaymaniyah, Kurdistan Region 46001, Iraq
- Department of Biology, College of Science, Al-Qasim Green University, Al-Qassim, Babylon 51013, Iraq
| | - Azhar Ariffin
- Department of Chemistry, Faculty of Science, University Malaya, Kuala Lumpur 50603, Malaysia
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5
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Beamer AW, Buss JA. Synthesis, Structural Characterization, and CO 2 Reactivity of a Constitutionally Analogous Series of Tricopper Mono-, Di-, and Trihydrides. J Am Chem Soc 2023. [PMID: 37276588 DOI: 10.1021/jacs.3c04170] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The formation of hydrides at heterogeneous copper surfaces results in dramatic structural and reactivity changes, yet the morphologies of these materials and their respective roles in catalysis are not well understood. Of particular interest is the reactivity of heterogeneous copper hydrides with carbon dioxide (CO2), an early mechanistic branching point in the CO2 reduction reaction. Herein, we report the synthesis, characterization, and reactivity of tricopper compounds supported by a facially biased, chelating tris(carbene) ligand scaffold. This sterically bulky environment affords access to an isolable series of tricopper hydrides: [LCu3H]2+ (4), [LCu3H2]+ (3), and LCu3H3 (6). Single-crystal X-ray diffraction and solution NMR spectroscopy studies reveal both geometric flexibility within the Cu3 core and fluxionality of hydride ligands across the Cu3 cluster, providing both atomically precise experimental analogues of static surface species and emulating dynamic ligand behavior proposed for surfaces. Electronic structure calculations serve as a predictor of hydricity, which was likewise benchmarked experimentally via both protonolysis and hydride abstraction reactions. Increased hydride number (and commensurately lower cluster charge) results in more hydridic complexes, with a thermodynamic hydricity range spanning >30 kcal/mol. These thermochemical studies serve as an accurate predictor of CO2 reactivity. Together, this Cu3Hx series exhibits the structure/reactivity relationships proposed for catalytically active copper surfaces, validating the application of carefully designed molecular clusters toward elucidating mechanisms in surface science.
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Affiliation(s)
- Andrew W Beamer
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Joshua A Buss
- Willard Henry Dow Laboratory, Department of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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6
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English LE, Horsley Downie TM, Lyall CL, Mahon MF, McMullin CL, Neale SE, Saunders CM, Liptrot DJ. Selective hydroboration of electron-rich isocyanates by an NHC-copper(I) alkoxide. Chem Commun (Camb) 2023; 59:1074-1077. [PMID: 36621804 DOI: 10.1039/d2cc04742j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The (IPr)CuOtBu catalysed reduction of 11 aryl and alkyl isocyanates with pinacolborane gave only the boraformamides, pinBN(R)C(O)H, in most cases. Overreduction, which hampers almost all isocyanate hydroborations, was restricted to electron poor aryl isocyanates (4-NC-C6H4NCO, 4-F3C-C6H4NCO, 3-O2N-C6H4NCO). Computational analysis showed stability of [(IPr)CuH]2, which was proposed to be the catalyst resting state, drives selectivity, suggesting an approach to prevent overreduction in future work. In the case of iPrNCO, formation of this species renders overreduction kinetically inaccessible. For 4-NC-C6H4NCO, however, the barrier height for the first step of over-reduction is much lower, even relative to [(IPr)CuH]2, resulting in unselective reduction.
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Affiliation(s)
- Laura E English
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK. .,Centre for Sustainable and Circular Technologies, Bath, BA2 7AY, UK
| | | | | | - Mary F Mahon
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | | | - Samuel E Neale
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
| | | | - David J Liptrot
- Department of Chemistry, University of Bath, Bath, BA2 7AY, UK.
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7
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Tran BL, Erickson JD, Speelman AL, Bullock RM. Mechanistic Studies of Carbonyl Allylation Mediated by (NHC)CuH: Isoprene Insertion, Allylation, and β-Hydride Elimination. Inorg Chem 2023; 62:342-352. [PMID: 36525336 DOI: 10.1021/acs.inorgchem.2c03402] [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
The ability of Cu-H complexes to undergo selective insertion of unsaturated hydrocarbons under mild conditions has rendered them valuable, versatile catalysts. The direct formation of Cu allyl intermediates from unfunctionalized 1,3-dienes and transient Cu hydrides is an appealing strategy for upgrading conjugated diene feedstocks. However, empirical mechanistic studies of the underlying elementary steps and characterization of key intermediates in Cu-H catalysis are sparse. Using [(NHC)CuH]2 (NHC = N-heterocyclic carbene), we examined the steric effects of NHC ligands on two key elementary steps of CuH-catalyzed carbonyl allylation: the insertion of a diene into the Cu-H bond to produce a Cu-allyl complex, and the formation of C-C bonds from stoichiometric allylations of ketones and aldehydes. The resulting allyl and homoallylic alkoxide complexes have been characterized by NMR spectroscopy and single-crystal X-ray diffraction. Employing isolable (NHC)Cu-allyl complexes, we further evaluated the roles of the ligand size, electronic properties of carbonyl substrates, coordinating groups within the substrate, and solvent on the regioselectivity, diastereoselectivity, and relative rate of the C-C bond formation step. In contrast to the clean allylation of ketones, allylation of aldehydes provided a rare example of a formal β-hydride elimination reaction from a secondary homoallylic alkoxide species. Mechanistic studies of key elementary steps provide insights for a range of catalytic reactions of dienes mediated by hydride complexes.
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Affiliation(s)
- Ba L Tran
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jeremy D Erickson
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Amy L Speelman
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - R Morris Bullock
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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8
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Reactivity and Stability of a Ring-Expanded N-Heterocyclic Carbene Copper(I) Boryl Imidinate. INORGANICS 2022. [DOI: 10.3390/inorganics10090135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Frustrated Lewis pairs (FLPs) have evolved from a revolutionary concept to widely applied catalysts. We recently reported the ring-expanded N-heterocyclic carbene supported copper(I) boryliminomethanide, (6-Dipp)CuC(=NtBu)Bpin and noted it reacted with heterocumulenes in a fashion reminiscent of FLPs. We thus set out to explore its reactivity with a range of other substrates known to react with FLPs. This was undertaken by a series of synthetic studies using NMR spectroscopy, mass spectrometry, IR spectroscopy, and single crystal X-ray crystallography. (6-Dipp)CuC(=NtBu)Bpin was investigated for its reactivity towards water, hydrogen, and phenylacetylene. Its solution stability was also explored. Upon heating, (6-Dipp)CuC(=NtBu)Bpin decomposed to (6-Dipp)CuCN, which was characterised by SC-XRD and NMR spectroscopy, and pinBtBu. Although no reaction was observed with hydrogen, (6-Dipp)CuC(=NtBu)Bpin reacted with water to form (6-Dipp)CuC(=N(H)tBu)B(OH)pin, which was structurally characterised. In contrast to its FLP-reminiscent heterolytic cleavage reactivity towards water, (6-Dipp)CuC(=NtBu)Bpin acted as a Brønsted base towards phenyl acetylene generating (6-Dipp)CuCCPh, which was characterised by SC-XRD, IR, and NMR spectroscopy, and HC(=NtBu)Bpin
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9
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Norwine EE, Kiernicki JJ, Zeller M, Szymczak NK. Distinct Reactivity Modes of a Copper Hydride Enabled by an Intramolecular Lewis Acid. J Am Chem Soc 2022; 144:15038-15046. [PMID: 35960993 PMCID: PMC10291504 DOI: 10.1021/jacs.2c02937] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
We disclose a 1,4,7-triazacyclononane (TACN) ligand featuring an appended boron Lewis acid. Metalation with Cu(I) affords a series of tetrahedral complexes including a boron-capped cuprous hydride. We demonstrate distinct reactivity modes as a function of chemical oxidation: hydride transfer to CO2 in the copper(I) state and oxidant-induced H2 evolution as well as alkyne reduction.
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Affiliation(s)
- Emily E. Norwine
- University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - John J. Kiernicki
- University of Michigan, 930 N. University, Ann Arbor, MI 48109 (USA)
| | - Matthias Zeller
- H. C. Brown Laboratory, Purdue University, 560 Oval Dr., West Lafayette, IN 47907 (USA)
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10
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Bienenmann RLM, Schanz AJ, Ooms PL, Lutz M, Broere DLJ. A Well‐Defined Anionic Dicopper(I) Monohydride Complex that Reacts like a Cluster**. Angew Chem Int Ed Engl 2022; 61:e202202318. [PMID: 35412679 PMCID: PMC9400846 DOI: 10.1002/anie.202202318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Indexed: 11/08/2022]
Abstract
Low‐nuclearity copper hydrides are rare and few well‐defined dicopper hydrides have been reported. Herein, we describe the first example of a structurally characterized anionic dicopper hydride complex. This complex does not display typical reactivity associated with low‐nuclearity copper hydrides, such as alcoholysis or insertion reactions. Instead, its stoichiometric and catalytic reactivity is akin to that of copper hydride clusters. The distinct reactivity is ascribed to the robust dinuclear core that is bound tightly within the dinucleating ligand scaffold.
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Affiliation(s)
- Roel L. M. Bienenmann
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Alexandra J. Schanz
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Pascale L. Ooms
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Martin Lutz
- Structural Biochemistry Bijvoet Centre for Biomolecular Research Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Daniël L. J. Broere
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
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11
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Bienenmann RLM, Schanz AJ, Ooms PL, Lutz M, Broere DLJ. A Well‐Defined Anionic Dicopper(I) Monohydride Complex that Reacts like a Cluster**. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202202318] [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]
Affiliation(s)
- Roel L. M. Bienenmann
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Alexandra J. Schanz
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Pascale L. Ooms
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Martin Lutz
- Structural Biochemistry Bijvoet Centre for Biomolecular Research Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Daniël L. J. Broere
- Organic Chemistry and Catalysis Debye Institute for Nanomaterials Science Faculty of Science Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
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12
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Hirano K, Miura M. Hydroamination, Aminoboration, and Carboamination with Electrophilic Amination Reagents: Umpolung-Enabled Regio- and Stereoselective Synthesis of N-Containing Molecules from Alkenes and Alkynes. J Am Chem Soc 2022; 144:648-661. [PMID: 34986637 DOI: 10.1021/jacs.1c12663] [Citation(s) in RCA: 57] [Impact Index Per Article: 28.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Nitrogen (N) is ubiquitously found in bioactive molecules, pharmaceutical agents, and organic functional materials. Accordingly, development of new C-N bond-forming catalysis has been one of the long-standing research subjects in synthetic organic chemistry. In this Perspective, recent advances in highly selective amination reactions with electrophilic amination reagents are described: by taking advantage of the concept of nitrogen umpolung, otherwise challenging aminofunctionalizations, such as hydroamination, aminoboration, and carboamination, of readily available feedstock-like alkenes and alkynes are possible, giving densely functionalized complex and often chiral alkylamines with high selectivity. The scope, limitations, and reaction mechanism are briefly summarized.
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Affiliation(s)
- Koji Hirano
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, Suita, Osaka 565-0871, Japan
| | - Masahiro Miura
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka 565-0871, Japan
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13
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Charman RSC, Mahon MF, Lowe JP, Liptrot DJ. The structures of ring-expanded NHC supported copper(I) triphenylstannyls and their phenyl transfer reactivity towards heterocumulenes. Dalton Trans 2022; 51:831-835. [PMID: 34994747 DOI: 10.1039/d1dt03109k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Three ring-expanded N-heterocyclic carbene-supported copper(I) triphenylstannyls have been synthesised by the reaction of (RE-NHC)CuOtBu with triphenylstannane (RE-NHC = 6-Mes, 6-Dipp, 7-Dipp). The compounds were characterised by NMR spectroscopy and X-ray crystallography. Reaction of (6-Mes)CuSnPh3 with di-p-tolyl carbodiimide, phenyl isocyanate and phenylisothiocyanate gives access to a copper(I) benzamidinate, benzamide and benzothiamide respectively via phenyl transfer from the triphenylstannyl anion with concomitant formation of (Ph2Sn)n. Attempts to exploit this reactivity under a catalytic regime were hindered by rapid copper(I)-catalysed dismutation of Ph3SnH to Ph4Sn, various perphenylated tin oligomers, H2 and a metallic material thought to be Sn(0). Mechanistic insight was provided by reaction monitoring via NMR spectroscopy and mass spectrometry.
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Affiliation(s)
- Rex S C Charman
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| | - John P Lowe
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
| | - David J Liptrot
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY UK.
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14
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Kinzhalov MA, Ivanov DM, Melekhova AA, Bokach NA, Gomila RM, Frontera A, Kukushkin VY. Chameleonic Metal-bound Isocyanides: π-Donating CuI-center Imparts a Nucleophilicity to the Isocyanide Carbon toward Halogen Bonding. Inorg Chem Front 2022. [DOI: 10.1039/d2qi00034b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the structures of the isostructural cocrystals [CuI3(CNXyl)3]·CHX3 (X = Br, I), two adjacent CuI-bound isocyanide groups, whose carbon lone pairs are blocked by the ligation, exhibit nucleophilic properties induced...
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15
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Horsley Downie TM, Charman RSC, Hall JW, Mahon MF, Lowe JP, Liptrot DJ. A stable ring-expanded NHC-supported copper boryl and its reactivity towards heterocumulenes. Dalton Trans 2021; 50:16336-16342. [PMID: 34734620 DOI: 10.1039/d1dt03540a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Reaction of bis(pinacolato)diboron with (6-Dipp)CuOtBu generates a ring-expanded N-heterocyclic carbene supported copper(I) boryl, (6-Dipp)CuBpin. This compound showed remarkable stability and was characterised by NMR spectroscopy and X-ray crystallography. (6-Dipp)CuBpin readily dechalcogenated a range of heterocumulenes such as CO2, isocyanates and isothiocyanates to yield (6-Dipp)CuXBpin (X = O, S). In the case of CO2 catalytic reduction to CO is viable in the presence of excess bis(pinacolato)diboron. In contrast, in the case of iso(thio)cyanates, the isocyanide byproduct of dechalcogenation reacted with (6-Dipp)CuBpin to generate a copper(I) borylimidinate, (6-Dipp)CuC(NR)Bpin, which went on to react with heterocumulenes. This off-cycle reactivity gives selective access to a range of novel boron-containing heterocycles bonded to copper, but precludes catalytic reactivity.
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Affiliation(s)
| | - Rex S C Charman
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY, UK.
| | - Jonathan W Hall
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY, UK.
| | - John P Lowe
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY, UK.
| | - David J Liptrot
- Department of Chemistry, University of Bath. Claverton Down, Bath, BA2 7AY, UK.
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16
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Speelman AL, Tran BL, Erickson JD, Vasiliu M, Dixon DA, Bullock RM. Accelerating the insertion reactions of (NHC)Cu-H via remote ligand functionalization. Chem Sci 2021; 12:11495-11505. [PMID: 34567502 PMCID: PMC8409461 DOI: 10.1039/d1sc01911b] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 07/23/2021] [Indexed: 12/27/2022] Open
Abstract
Most ligand designs for reactions catalyzed by (NHC)Cu-H (NHC = N-heterocyclic carbene ligand) have focused on introducing steric bulk near the Cu center. Here, we evaluate the effect of remote ligand modification in a series of [(NHC)CuH]2 in which the para substituent (R) on the N-aryl groups of the NHC is Me, Et, t Bu, OMe or Cl. Although the R group is distant (6 bonds away) from the reactive Cu center, the complexes have different spectroscopic signatures. Kinetics studies of the insertion of ketone, aldimine, alkyne, and unactivated α-olefin substrates reveal that Cu-H complexes with bulky or electron-rich R groups undergo faster substrate insertion. The predominant cause of this phenomenon is destabilization of the [(NHC)CuH]2 dimer relative to the (NHC)Cu-H monomer, resulting in faster formation of Cu-H monomer. These findings indicate that remote functionalization of NHCs is a compelling strategy for accelerating the rate of substrate insertion with Cu-H species.
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Affiliation(s)
- Amy L Speelman
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Ba L Tran
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Jeremy D Erickson
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Monica Vasiliu
- Department of Chemistry and Biochemistry, University of Alabama Tuscaloosa AL 35487 USA
| | - David A Dixon
- Department of Chemistry and Biochemistry, University of Alabama Tuscaloosa AL 35487 USA
| | - R Morris Bullock
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory Richland WA 99352 USA
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17
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Persaud RR, Fang Z, Zall CM, Appel AM, Dixon DA. Computational Study of Triphosphine-Ligated Cu(I) Catalysts for Hydrogenation of CO 2 to Formate. J Phys Chem A 2021; 125:6600-6610. [PMID: 34297558 DOI: 10.1021/acs.jpca.1c04050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The catalyzed hydrogenation of CO2 to formate via a triphosphine-ligated Cu(I) was studied computationally at the density functional theory level in the presence of a self-consistent reaction field. Of the four functionals benchmarked, M06 was generally in the best agreement with the available experimentally estimated values. Two bases, DBU and TBD, were studied in the context of two proposed mechanisms in the MeCN solvent. Activation of H2 was explored by using LCu(DBU)+ to form LCuH. Dissociation of a ligand arm results in higher barriers to form the key hydride complex, LCuH. The preferred mechanism passes through a transition state, where the H2 has one H atom interacting with the copper center and the other H atom interacting with the N atom of the base, similar to H2 insertion into a frustrated Lewis pair. There is no significant difference between the choice of a base, DBU or TBD, with respect to the proposed mechanisms. We propose that the experimentally observed differences between DBU and TBD reactivities for this mechanism are due to off-pathway changes.
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Affiliation(s)
- Rudradatt R Persaud
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Zongtang Fang
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
| | - Christopher M Zall
- Department of Chemistry, Sam Houston State University, 1003 Bowers Boulevard, Huntsville, Texas 77341, United States
| | - Aaron M Appel
- Pacific Northwest National Laboratory, P.O. Box 999, MS K2-57, Richland, Washington 99352, United States
| | - David A Dixon
- Department of Chemistry and Biochemistry, The University of Alabama, Shelby Hall, Tuscaloosa, Alabama 35487-0336, United States
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18
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Hall JW, Bouchet D, Mahon MF, Whittlesey MK, Cazin CSJ. Synthetic Access to Ring-Expanded N-Heterocyclic Carbene (RE-NHC) Copper Complexes and Their Performance in Click Chemistry. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00039] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Jonathan W. Hall
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | - Damien Bouchet
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 283 (S3), Ghent 9000, Belgium
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, U.K
| | | | - Catherine S. J. Cazin
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 283 (S3), Ghent 9000, Belgium
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19
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Takebayashi S, Fayzullin RR. [Co(NHC)(CO) 3]: Isolation and Reactivity Study of a Model 17-Electron Species in the Oxo Process. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00765] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Satoshi Takebayashi
- Science and Technology Group, Okinawa Institute of Science and Technology Graduate University, 1919-1 Tancha, Onna-son, Okinawa 904-0495, Japan
| | - Robert R. Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Street, Kazan 420088, Russian Federation
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20
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Ekanayake DA, Chakraborty A, Krause JA, Guan H. Steric Effects of HN(CH2CH2PR2)2 on the Nuclearity of Copper Hydrides. Inorg Chem 2020; 59:12817-12828. [DOI: 10.1021/acs.inorgchem.0c01865] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Dewmi A. Ekanayake
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Arundhoti Chakraborty
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Hairong Guan
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
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21
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Krahfuss MJ, Radius U. N-Heterocyclic Silylenes as Metal–Metal Bridges and Metal–Halide Activators in Transition Metal Complexes. Inorg Chem 2020; 59:10976-10985. [DOI: 10.1021/acs.inorgchem.0c01462] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Mirjam J. Krahfuss
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
| | - Udo Radius
- Institut für Anorganische Chemie Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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22
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Schütz M, Muhr M, Freitag K, Gemel C, Kahlal S, Saillard JY, Da Silva ACH, Da Silva JLF, Fässler TF, Fischer RA. Contrasting Structure and Bonding of a Copper-Rich and a Zinc-Rich Intermetalloid Cu/Zn Cluster. Inorg Chem 2020; 59:9077-9085. [PMID: 32578989 DOI: 10.1021/acs.inorgchem.0c00943] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Reaction of the Cu(I) sources, [Cu5](Mes)5 and [(iDipp)CuOtBu] (Mes = mesityl; iDipp = 1,3-bis(2,6-diisopropylphenyl)-1H-imidazol-2-ylidene) with the Zn(I) complex [Zn2](Cp*)2 leads to a mixture of intermetallic Cu/Zn clusters with a distribution of species that is dependent on the stoichiometric ratio of the reactants, the reaction time, as well as the temperature. Systematic and careful investigation of the product mixtures rendered the isolation of two new clusters possible, i.e., the Zn-rich, red cluster 1, [CuZn10](Cp*)7 = [Cu(ZnZnCp*)3(ZnCp*)4], as well as the Cu-rich, dark-green cluster 2 [Cu10Zn2](Mes)6(Cp*)2. Structure and bonding of these two species was rationalized with the help of density functional theory calculations. Whereas 1 can be viewed as an 18-electron Cu center coordinated to four ZnCp* and three ZnZnCp* one-electron ligands (with some interligand bonding interaction), compound 2 is better to be described as a six-electron superatom cluster. This unusual electron count is associated with a prolate distortion from a spherical superatom structure. This unexpected situation is likely to be associated with the ZnCp* capping units that offer the possibility to strongly bind to the top and the bottom of the cluster in addition to the bridging mesityl ligands stabilizing the Cu core of the cluster.
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Affiliation(s)
- Max Schütz
- Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany.,Catalysis Research Centre, Technical University Munich, Ernst-Otto-Fischer Strasse 1, D-85748 Garching, Germany
| | - Maximilian Muhr
- Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany.,Catalysis Research Centre, Technical University Munich, Ernst-Otto-Fischer Strasse 1, D-85748 Garching, Germany
| | - Kerstin Freitag
- Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany
| | - Christian Gemel
- Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany.,Catalysis Research Centre, Technical University Munich, Ernst-Otto-Fischer Strasse 1, D-85748 Garching, Germany
| | - Samia Kahlal
- Univ Rennes, CNRS, ISCR-UMR 6226, F-35000 Rennes, France
| | | | - Augusto C H Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, PO Box 780, 13560-970 São Carlos, SP, Brazil
| | - Juarez L F Da Silva
- São Carlos Institute of Chemistry, University of São Paulo, PO Box 780, 13560-970 São Carlos, SP, Brazil
| | - Thomas F Fässler
- Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany.,Catalysis Research Centre, Technical University Munich, Ernst-Otto-Fischer Strasse 1, D-85748 Garching, Germany
| | - Roland A Fischer
- Department of Chemistry, Technical University Munich, Lichtenbergstrasse 4, D-85748 Garching, Germany.,Catalysis Research Centre, Technical University Munich, Ernst-Otto-Fischer Strasse 1, D-85748 Garching, Germany
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23
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Nakajima T, Nakamae K, Ura Y, Tanase T. Multinuclear Copper Hydride Complexes Supported by Polyphosphine Ligands. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000328] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takayuki Nakajima
- Department of Chemistry; Faculty of Science; Nara Women's University; Kita Uoya-Nishi-Machi Nara 630-8506 Japan
| | - Kanako Nakamae
- Department of Chemistry; Faculty of Science; Nara Women's University; Kita Uoya-Nishi-Machi Nara 630-8506 Japan
| | - Yasuyuki Ura
- Department of Chemistry; Faculty of Science; Nara Women's University; Kita Uoya-Nishi-Machi Nara 630-8506 Japan
| | - Tomoaki Tanase
- Department of Chemistry; Faculty of Science; Nara Women's University; Kita Uoya-Nishi-Machi Nara 630-8506 Japan
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24
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Matavos-Aramyan S, Soukhakian S, Jazebizadeh MH. Mononuclear Cu Complexes Based on Nitrogen Heterocyclic Carbene: A Comprehensive Review. Top Curr Chem (Cham) 2020; 378:39. [PMID: 32367181 DOI: 10.1007/s41061-020-00304-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 04/16/2020] [Indexed: 11/28/2022]
Abstract
During the last decade, organometallic, coordination, and catalytic chemistry of the three-dimensional metals such as copper (Cu) has been greatly affected by the emergence of nitrogen heterocyclic carbene (NHC) complexes. The NHCs, and in particular the mononuclear CuI-based ones, have been proven vastly useful in several applications such as in biosynthesis, catalysis, photochemistry, etc. This review tries to thoroughly describe a series of mononuclear CuI NHC complexes and their subcategories such as heteroleptics, and bidentate and tridentate heteroatom complexes, and give some detailed insights on their development, emergence, and applications. A brief outlook is also disclosed to enable other researchers to further develop a platform for future advances and studies in the field of CuI-based NHCs.
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Affiliation(s)
- Sina Matavos-Aramyan
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran.
| | - Sadaf Soukhakian
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran
| | - Mohammad Hossein Jazebizadeh
- Research and Development Department, Division of Chemistry, Raazi Environmental Protection Foundation, Shiraz, Iran
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25
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Cervantes‐Reyes A, Rominger F, Hashmi ASK. Sterically Demanding Ag I and Cu I N-Heterocyclic Carbene Complexes: Synthesis, Structures, Steric Parameters, and Catalytic Activity. Chemistry 2020; 26:5530-5540. [PMID: 32104933 PMCID: PMC7216994 DOI: 10.1002/chem.202000600] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 02/27/2020] [Indexed: 12/13/2022]
Abstract
The synthesis and full characterization of new air-stable AgI and CuI complexes bearing structurally bulky expanded-ring N-heterocyclic carbene (erNHC) ligands is presented. The condensation of protonated NHC salts with Ag2 O afforded a collection of AgI complexes, and their first use as ligand transfer reagents led to novel isostructural CuI or AuI complexes. In situ deprotonation of the NHC salts in the presence of a copper(I) source, provides a library of new CuI complexes. The solid-state structures feature large N-CNHC -N angles (118-128°) and almost identical angles between the aryl groups on the nitrogen atoms and the plane of the N-C-N unit of the carbene (i.e. torsion angles close to 0°). Among the steric parameters, the percent buried volume (%Vbur ) values span easily in the 50-57 % range, and that one of (9-Dipp)CuBr complex (%Vbur =57.5) overcomes to other known erNHC-metal complexes reported to date. Preliminary catalytic experiments in the copper-catalyzed coupling between N-tosylhydrazone and phenylacetylene, afforded 76-93 % product at the 0.5-2.5 mol % catalyst loading, proving the stability of CuI erNHC complexes at elevated temperatures (100 °C).
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Affiliation(s)
| | - Frank Rominger
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
- Chemistry DepartmentFaculty of ScienceKing Abdulaziz UniversityJeddah21589Saudi Arabia
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26
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Nakajima T, Tanase T. Transition Metal Clusters Constrained by Linear Tetradentate Phosphine Ligands. CHEM LETT 2020. [DOI: 10.1246/cl.200041] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Takayuki Nakajima
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Tomoaki Tanase
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
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27
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Jazzar R, Soleilhavoup M, Bertrand G. Cyclic (Alkyl)- and (Aryl)-(amino)carbene Coinage Metal Complexes and Their Applications. Chem Rev 2020; 120:4141-4168. [DOI: 10.1021/acs.chemrev.0c00043] [Citation(s) in RCA: 131] [Impact Index Per Article: 32.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Rodolphe Jazzar
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, United States
| | - Michele Soleilhavoup
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, United States
| | - Guy Bertrand
- UCSD-CNRS Joint Research Laboratory (UMI 3555), Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0358, United States
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28
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Tran BL, Neisen BD, Speelman AL, Gunasekara T, Wiedner ES, Bullock RM. Mechanistic Studies on the Insertion of Carbonyl Substrates into Cu‐H: Different Rate‐Limiting Steps as a Function of Electrophilicity. Angew Chem Int Ed Engl 2020; 59:8645-8653. [DOI: 10.1002/anie.201916406] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 02/01/2020] [Indexed: 11/11/2022]
Affiliation(s)
- Ba L. Tran
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Benjamin D. Neisen
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Amy L. Speelman
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Thilina Gunasekara
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Eric S. Wiedner
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - R. Morris Bullock
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
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29
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Tran BL, Neisen BD, Speelman AL, Gunasekara T, Wiedner ES, Bullock RM. Mechanistic Studies on the Insertion of Carbonyl Substrates into Cu‐H: Different Rate‐Limiting Steps as a Function of Electrophilicity. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916406] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Ba L. Tran
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Benjamin D. Neisen
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Amy L. Speelman
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Thilina Gunasekara
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Eric S. Wiedner
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
| | - R. Morris Bullock
- Institute for Integrated Catalysis Pacific Northwest National Laboratory Richland WA 99352 USA
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30
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Collet JW, Roose TR, Ruijter E, Maes BUW, Orru RVA. Base Metal Catalyzed Isocyanide Insertions. Angew Chem Int Ed Engl 2020; 59:540-558. [DOI: 10.1002/anie.201905838] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/01/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Jurriën W. Collet
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
- Organic SynthesisDepartment of ChemistryUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
| | - Thomas R. Roose
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Eelco Ruijter
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Bert U. W. Maes
- Organic SynthesisDepartment of ChemistryUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
| | - Romano V. A. Orru
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
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31
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Kaicharla T, Zimmermann BM, Oestreich M, Teichert JF. Using alcohols as simple H 2-equivalents for copper-catalysed transfer semihydrogenations of alkynes. Chem Commun (Camb) 2019; 55:13410-13413. [PMID: 31638107 DOI: 10.1039/c9cc06637c] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Copper(i)/N-heterocyclic carbene complexes enable a transfer semihydrogenation of alkynes employing simple and readily available alcohols such as isopropanol. The practical overall protocol circumvents the use of commonly employed high pressure equipment when using dihydrogen (H2) on the one hand, and avoids the generation of stoichiometric silicon-based waste on the other hand, when hydrosilanes are used as terminal reductants.
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Affiliation(s)
- Trinadh Kaicharla
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany.
| | - Birte M Zimmermann
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany.
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany.
| | - Johannes F Teichert
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany.
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32
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Collet JW, Roose TR, Ruijter E, Maes BUW, Orru RVA. Base Metal Catalyzed Isocyanide Insertions. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201905838] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jurriën W. Collet
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
- Organic SynthesisDepartment of ChemistryUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
| | - Thomas R. Roose
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Eelco Ruijter
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Bert U. W. Maes
- Organic SynthesisDepartment of ChemistryUniversity of Antwerp Groenenborgerlaan 171 2020 Antwerp Belgium
| | - Romano V. A. Orru
- Department of Chemistry and Pharmaceutical Sciences and Amsterdam Institute for Molecules, Medicines & Systems (AIMMS)Vrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
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33
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DiBenedetto TA, Parsons AM, Jones WD. Markovnikov-Selective Hydroboration of Olefins Catalyzed by a Copper N-Heterocyclic Carbene Complex. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00394] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tarah A. DiBenedetto
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Astrid M. Parsons
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - William D. Jones
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
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34
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Andrella NO, Xu N, Gabidullin BM, Ehm C, Baker RT. Selective Copper Complex-Catalyzed Hydrodefluorination of Fluoroalkenes and Allyl Fluorides: A Tale of Two Mechanisms. J Am Chem Soc 2019; 141:11506-11521. [PMID: 31305996 DOI: 10.1021/jacs.9b03101] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The transition to more economically friendly small-chain fluorinated groups is leading to a resurgence in the synthesis and reactivity of fluoroalkenes. One versatile method to obtain a variety of commercially relevant hydrofluoroalkenes involves the catalytic hydrodefluorination (HDF) of fluoroalkenes using silanes. In this work it is shown that copper hydride complexes of tertiary phosphorus ligands (L) can be tuned to achieve selective multiple HDF of fluoroalkenes. In one example, HDF of the hexafluoropropene dimer affords a single isomer of heptafluoro-2-methylpentene in which five fluorines have been selectively replaced with hydrogens. DFT computational studies suggest a distinct HDF mechanisms for L2CuH (bidentate or bulky monodentate phosphines) and L3CuH (small cone angle monodentate phosphines) catalysts, allowing for stereocontrol of the HDF of trifluoroethylene.
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Affiliation(s)
- Nicholas O Andrella
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation , 30 Marie Curie , University of Ottawa , Ottawa , ON K1N 6N5 Canada
| | - Nancy Xu
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation , 30 Marie Curie , University of Ottawa , Ottawa , ON K1N 6N5 Canada
| | - Bulat M Gabidullin
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation , 30 Marie Curie , University of Ottawa , Ottawa , ON K1N 6N5 Canada
| | - Christian Ehm
- Dipartimento di Scienze Chimiche , Università di Napoli Federico II , Via Cintia 80126 Napoli , Italy
| | - R Tom Baker
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation , 30 Marie Curie , University of Ottawa , Ottawa , ON K1N 6N5 Canada
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35
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Jordan AJ, Walde RK, Schultz KM, Bacsa J, Sadighi JP. Nitrosonium Reactivity of (NHC)Copper(I) Sulfide Complexes. Inorg Chem 2019; 58:9592-9596. [DOI: 10.1021/acs.inorgchem.9b01676] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Abraham J. Jordan
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Rebecca K. Walde
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Kelly M. Schultz
- Murdock Hall, Department of Chemistry, Linfield College, McMinnville, Oregon 97128, United States
| | - John Bacsa
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
- X-ray Crystallography Center, Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Joseph P. Sadighi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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36
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Nakajima T, Kamiryo Y, Kishimoto M, Imai K, Nakamae K, Ura Y, Tanase T. Synergistic Cu2 Catalysts for Formic Acid Dehydrogenation. J Am Chem Soc 2019; 141:8732-8736. [DOI: 10.1021/jacs.9b03532] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Takayuki Nakajima
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Yoshia Kamiryo
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Masayo Kishimoto
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Kaho Imai
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Kanako Nakamae
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Yasuyuki Ura
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Tomoaki Tanase
- Department of Chemistry, Faculty of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
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37
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Danopoulos AA, Simler T, Braunstein P. N-Heterocyclic Carbene Complexes of Copper, Nickel, and Cobalt. Chem Rev 2019; 119:3730-3961. [PMID: 30843688 DOI: 10.1021/acs.chemrev.8b00505] [Citation(s) in RCA: 263] [Impact Index Per Article: 52.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The emergence of N-heterocyclic carbenes as ligands across the Periodic Table had an impact on various aspects of the coordination, organometallic, and catalytic chemistry of the 3d metals, including Cu, Ni, and Co, both from the fundamental viewpoint but also in applications, including catalysis, photophysics, bioorganometallic chemistry, materials, etc. In this review, the emergence, development, and state of the art in these three areas are described in detail.
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Affiliation(s)
- Andreas A Danopoulos
- Laboratory of Inorganic Chemistry , National and Kapodistrian University of Athens , Panepistimiopolis Zografou , Athens GR 15771 , Greece.,Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| | - Thomas Simler
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
| | - Pierre Braunstein
- Université de Strasbourg, CNRS, Institut de Chimie UMR 7177 , Laboratoire de Chimie de Coordination , Strasbourg 67081 Cedex , France
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38
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Cross-coupling reactions by cooperative Pd/Cu or Ni/Cu catalysis based on the catalytic generation of organocopper nucleophiles. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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39
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Sampford KR, Carden JL, Kidner EB, Berry A, Cavell KJ, Murphy DM, Kariuki BM, Newman PD. Twisting the arm: structural constraints in bicyclic expanded-ring N-heterocyclic carbenes. Dalton Trans 2019; 48:1850-1858. [PMID: 30652174 DOI: 10.1039/c8dt04462g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A series of diaryl, mono-aryl/alkyl and dialkyl mono- and bicyclic expanded-ring N-heterocyclic carbenes (ER-NHCs) have been prepared and their complexation to Au(i) investigated through the structural analysis of fifteen Au(NHC)X and/or [Au(NHC)2]X complexes. The substituted diaryl 7-NHCs are the most sterically encumbered with large buried volume (%VB) values of 40-50% with the less flexible six-membered analogues having %VB values at least 5% smaller. Although the bicyclic systems containing fused 6- and 7-membered rings (6,7-NHCs) are constrained with relatively acute NCN bond angles, they have the largest %VB values of the dialkyl derivatives reported here, a feature related to the fixed conformation of the heterocyclic rings and the compressional effect of a pre-set methyl substituent.
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Affiliation(s)
| | - Jamie L Carden
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
| | - Edward B Kidner
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
| | - Abigail Berry
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
| | | | - Damien M Murphy
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK
| | | | - Paul D Newman
- School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK and Cardiff Catalysis Institute, School of Chemistry, Cardiff University, Cardiff, CF10 3AT, UK.
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40
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Ritter F, Mukherjee D, Spaniol TP, Hoffmann A, Okuda J. A Masked Cuprous Hydride as a Catalyst for Carbonyl Hydrosilylation in Aqueous Solutions. Angew Chem Int Ed Engl 2019; 58:1818-1822. [DOI: 10.1002/anie.201811890] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Florian Ritter
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
| | - Debabrata Mukherjee
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
- Current address: Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur West Bengal 721302 India
| | - Thomas P. Spaniol
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
| | - Alexander Hoffmann
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
| | - Jun Okuda
- Institute of Inorganic ChemistryRWTH Aachen University Landoltweg 1 52056 Aachen Germany
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41
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Ritter F, Mukherjee D, Spaniol TP, Hoffmann A, Okuda J. Ein maskiertes Kupferhydrid als Katalysator für die Carbonylhydrosilylierung in wässrigen Lösungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201811890] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Florian Ritter
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Debabrata Mukherjee
- Derzeitige Adresse: Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur Westbengalen 721302 Indien
| | - Thomas P. Spaniol
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Alexander Hoffmann
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Jun Okuda
- Institut für Anorganische ChemieRWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
- Derzeitige Adresse: Department of ChemistryIndian Institute of Technology Kharagpur Kharagpur Westbengalen 721302 Indien
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42
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Dhayal RS, van Zyl WE, Liu CW. Copper hydride clusters in energy storage and conversion. Dalton Trans 2019; 48:3531-3538. [DOI: 10.1039/c8dt04639e] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Copper hydride clusters of variable nuclearity are derived from hydrogen and HCOOH as emerging energy storage materials and models.
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Affiliation(s)
- Rajendra S. Dhayal
- Department of Chemical Sciences
- School of Basic and Applied Sciences
- Central University of Punjab
- Bathinda 151 001
- India
| | - Werner E. van Zyl
- School of Chemistry and Physics
- University of KwaZulu Natal
- Durban 4000
- South Africa
| | - C. W. Liu
- Department of Chemistry
- National Dong Hwa University
- Hualien
- Taiwan 97401
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43
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Leon NJ, Yu HC, Mazzacano TJ, Mankad NP. Mixed phosphine/carbonyl derivatives of heterobimetallic copper–iron and copper–tungsten catalysts. Polyhedron 2019. [DOI: 10.1016/j.poly.2018.09.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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44
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Romero EA, Zhao T, Nakano R, Hu X, Wu Y, Jazzar R, Bertrand G. Tandem copper hydride–Lewis pair catalysed reduction of carbon dioxide into formate with dihydrogen. Nat Catal 2018. [DOI: 10.1038/s41929-018-0140-3] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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45
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Hall JW, Unson DML, Brunel P, Collins LR, Cybulski MK, Mahon MF, Whittlesey MK. Copper-NHC-Mediated Semihydrogenation and Hydroboration of Alkynes: Enhanced Catalytic Activity Using Ring-Expanded Carbenes. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00467] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jonathan W. Hall
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Darcy M. L. Unson
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Paul Brunel
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Lee R. Collins
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Mateusz K. Cybulski
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Mary F. Mahon
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
| | - Michael K. Whittlesey
- Department of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, United Kingdom
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46
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Nakajima T, Kamiryo Y, Hachiken K, Nakamae K, Ura Y, Tanase T. Tri- and Tetranuclear Copper Hydride Complexes Supported by Tetradentate Phosphine Ligands. Inorg Chem 2018; 57:11005-11018. [DOI: 10.1021/acs.inorgchem.8b01628] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Takayuki Nakajima
- Department of Chemistry, Faculty
of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Yoshia Kamiryo
- Department of Chemistry, Faculty
of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Kanae Hachiken
- Department of Chemistry, Faculty
of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Kanako Nakamae
- Department of Chemistry, Faculty
of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Yasuyuki Ura
- Department of Chemistry, Faculty
of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
| | - Tomoaki Tanase
- Department of Chemistry, Faculty
of Science, Nara Women’s University, Kitauoya-nishi-machi, Nara 630-8506, Japan
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47
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Affiliation(s)
- Abraham J. Jordan
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
| | - Percie K. Thompson
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
- Coretta Scott King Young Women’s Leadership Academy, 1190 Northwest Drive NW, Atlanta, Georgia 30318, United States
- Parker H. Petit Institute for Bioengineering and Biosciences, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Joseph P. Sadighi
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, United States
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48
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Sebest F, Dunsford JJ, Adams M, Pivot J, Newman PD, Díez‐González S. Ring-Expanded N-Heterocyclic Carbenes for Copper-Mediated Azide-Alkyne Click Cycloaddition Reactions. ChemCatChem 2018; 10:2041-2045. [PMID: 29861792 PMCID: PMC5969269 DOI: 10.1002/cctc.201701992] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Indexed: 11/08/2022]
Abstract
A series of well-defined copper(I) complexes bearing ring-expanded N-heterocyclic carbene (NHC) ligands has been applied to the azide-alkyne cycloaddition reaction. The obtained results notably showed that the six-membered NHC ligands outperform well-established five-membered ones. [CuI(Mes-6)] displayed a remarkable catalytic activity while respecting the strict criteria for click reactions.
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Affiliation(s)
- Filip Sebest
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
| | | | - Matthew Adams
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
| | - Jeremy Pivot
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
| | | | - Silvia Díez‐González
- Department of ChemistryImperial College LondonExhibition Road, South KensingtonLondonSW7 2AZUK
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49
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50
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Ellul CE, Lowe JP, Mahon MF, Raithby PR, Whittlesey MK. [Ru3(6-NHC)(CO)10]: synthesis, characterisation and reactivity of rare 46-electron tri-ruthenium clusters. Dalton Trans 2018; 47:4518-4523. [DOI: 10.1039/c8dt00189h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
The room temperature reaction of 6-membered ring N-heterocyclic carbenes with [Ru3(CO)12] affords [Ru3(6-NHC)(CO)10], rare examples of coordinatively unsaturated, 46-electron tri-ruthenium clusters. Upon mild heating in the presence of C5H5N, H2 or PPh3, these compounds lose carbene.
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Affiliation(s)
| | - John P. Lowe
- Department of Chemistry
- University of Bath
- Claverton Down
- UK
| | - Mary F. Mahon
- Department of Chemistry
- University of Bath
- Claverton Down
- UK
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