1
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Campagnolo F, Aneggi E, Baratta W, Munir T, Zuccaccia D. Diffusion Nuclear Magnetic Resonance Measurements on Cationic Gold (I) Complexes in Catalytic Conditions: Counterion and Solvent Effects. Molecules 2024; 29:3018. [PMID: 38998970 PMCID: PMC11243661 DOI: 10.3390/molecules29133018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/18/2024] [Accepted: 06/20/2024] [Indexed: 07/14/2024] Open
Abstract
The amount of free ions, ion pairs, and higher aggregate of the possible species present in a solution during the gold(I)-catalyzed alkoxylation of unsaturated hydrocarbon, i.e., ISIP (inner sphere ion pair) [(NHC)AuX] and OSIP (outer sphere ion pairs) [(NHC)Au(TME)X] [NHC 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene; TME = tetramethylethylene (2,3-bis methyl-butene); X- = Cl-, BF4-, OTf-; and OTs- BArF4- (ArF = 3,5-(CF3)2C6H3)], has been determined. The 1H and 19F DOSY NMR measurements conducted in catalytic conditions indicate that the dissociation degree (α) of the equilibrium ion pair/free ions {[(NHC)Au(TME)X] [(NHC)Au(TME)]+ + X-} depends on the nature of the counterion (X-) when chloroform is the catalytic solvent: while the compounds containing OTs- and OTf- as the counterion gave a low α (which means a high number of ion pairs) of 0.13 and 0.24, respectively, the compounds containing BF4- and BArF4- showed higher α values of 0.36 and 0.32, respectively. These results experimentally confirm previous deductions based on catalytic and theoretical data: the lower the α value, the greater the catalytic activity because the anion that can activate methanol during a nucleophilic attack, although the lower propensity to activate methanol of BF4- and BArF4-, as suggested by the DFT calculations, cannot be completely overlooked. As for the effect of the solvent, α increases as the dielectric constant increases, as expected, and in particular, green solvents with high dielectric constants show a very high α (0.90, 0.84, 0.80, and 0.70 for propylene carbonate, γ-valerolactone, acetone, and methanol, respectively), thus confirming that the moderately high activity of NHC-Au-OTf in these solvents is due to the specific effect of polar functionalities (O-H, C=O, O-R) in activating methanol. Finally, the DOSY measurements conducted in p-Cymene show the formation of quadrupole species: under these conditions, the anion can better exercise its 'template' and 'activating' roles, giving the highest TOF.
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Affiliation(s)
- Filippo Campagnolo
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Eleonora Aneggi
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Walter Baratta
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Talha Munir
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
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2
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Rölz M, Butschke B, Breit B. Azobenzene-Integrated NHC Ligands: A Versatile Platform for Visible-Light-Switchable Metal Catalysis. J Am Chem Soc 2024; 146:13210-13225. [PMID: 38709955 DOI: 10.1021/jacs.4c01138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
A new class of photoswitchable NHC ligands, named azImBA, has been developed by integrating azobenzene into a previously unreported imidazobenzoxazol-1-ylidene framework. These rigid photochromic carbenes enable precise control over confinement around a metal's coordination sphere. As a model system, gold(I) complexes of these NHCs exhibit efficient bidirectional E-Z isomerization under visible light, offering a versatile platform for reversibly photomodulating the reactivity of organogold species. Comprehensive kinetic studies of the protodeauration reaction reveal rate differences of up to 2 orders of magnitude between the E and Z isomers of the NHCs, resulting in a quasi-complete visible-light-gated ON/OFF switchable system. Such a high level of photomodulation efficiency is unprecedented for gold complexes, challenging the current state-of-the-art in photoswitchable organometallics. Thorough investigations into the ligand properties paired with structure-reactivity correlations underscored the unique ligand's steric features as a key factor for reactivity. This effective photocontrol strategy was further validated in gold(I) catalysis, enabling in situ photoswitching of catalytic activity in the intramolecular hydroalkoxylation and -amination of alkynes. Given the significance of these findings and its potential as a widely applicable, easily customizable photoswitchable ancillary ligand platform, azImBA is poised to stimulate the development of adaptive, multifunctional metal complexes.
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Affiliation(s)
- Martin Rölz
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
| | - Burkhard Butschke
- Institut für Anorganische und Analytische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
| | - Bernhard Breit
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstr. 21, 79104 Freiburg, Germany
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3
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Campagnolo F, Bevilacqua M, Baron M, Tubaro C, Biffis A, Zuccaccia D. Insights on the Anion Effect in N-heterocyclic Carbene Based Dinuclear Gold(I) Catalysts. Chempluschem 2024; 89:e202300421. [PMID: 37902252 DOI: 10.1002/cplu.202300421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 10/31/2023]
Abstract
Dinuclear bisNHC (bis(N-heterocyclic carbene)) gold(I) complexes 3 a and 4 a of general formula [Au2 Br2 (bisNHC)] were tested as catalysts in the cycloisomerization of N-(prop-2-yn-1-yl)benzamide and in the hydromethoxylation of 3-hexyne in the presence of silver(I) activators bearing different counteranions. The catalytic performance of mononuclear NHC complexes (1 a, 2 a) in the same reactions was also studied. The results highlighted the fundamental role of both NHC ligand and counterion in the catalytic cycles and activation process: dinuclear catalysts exhibit higher initial activity even under milder conditions but suffer in terms of stability with respect to mono NHCs. Furthermore, a new dinuclear bisNHC gold(I) complex 4 b of general formula [Au2 (OTs)2 (bisNHC)] (OTs=p-toluenesulfonate) was successfully synthesized and characterized by means of NMR and ESI-MS analyses.
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Affiliation(s)
- Filippo Campagnolo
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, 33100, Udine, Italy)
| | - Matteo Bevilacqua
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Marco Baron
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Cristina Tubaro
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Andrea Biffis
- Dipartimento di Scienze Chimiche, Università degli Studi di Padova, Via Marzolo 1, 35131, Padova, Italy
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Università di Udine, Via Cotonificio 108, 33100, Udine, Italy)
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4
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Morita N, Uchida S, Chiaki H, Ishii N, Tanikawa K, Tanaka K, Hashimoto Y, Tamura O. Gold(III)-Catalyzed Propargylic Substitution Reaction Followed by Cycloisomerization for Synthesis of Poly-Substituted Furans from N-Tosylpropargyl Amines with 1,3-Dicarbonyl Compounds. Molecules 2024; 29:378. [PMID: 38257291 PMCID: PMC10819120 DOI: 10.3390/molecules29020378] [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: 11/30/2023] [Revised: 12/22/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
The treatment of N-tosylpropargyl amines 1 with 1,3-dicarbonyl compounds 2 in the presence of AuBr3 (5 mol%) and AgOTf (15 mol%) afforded poly-substituted furans 3 in good-to-high yields via the gold-catalyzed cleavage of the sp3 carbon-nitrogen bond.
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Affiliation(s)
- Nobuyoshi Morita
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
| | - Shingo Uchida
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
| | - Hitomi Chiaki
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
| | - Naho Ishii
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
| | - Kentaro Tanikawa
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
| | - Kosaku Tanaka
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
- Research Foundation ITSUU Laboratory, C1232 Kanagawa Science Park R & D Building, 3-2-1 Sakado Takatsu-ku, Kawasaki 213-0012, Japan
| | - Yoshimitsu Hashimoto
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
| | - Osamu Tamura
- Department of Pharmacy, Showa Pharmaceutical University, 3-3165 Higashi-Tamagawagakuen, Machida 194-8543, Japan
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5
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Segato J, Aneggi E, Baratta W, Campagnolo F, Belpassi L, Belanzoni P, Zuccaccia D. Experimental and Theoretical Investigation of Ion Pairing in Gold(III) Catalysts. Organometallics 2023; 42:2973-2982. [PMID: 37886625 PMCID: PMC10599130 DOI: 10.1021/acs.organomet.3c00293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Indexed: 10/28/2023]
Abstract
The ion pairing structure of the possible species present in solution during the gold(III)-catalyzed hydration of alkynes: [(ppy)Au(NHC)Y]X2 and [(ppy)Au(NHC)X]X [ppy = 2-phenylpyridine, NHC = NHCiPr = 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene; NHC = NHCmes = 1,3-bis(2,4,6-trimethylphenyl)-imidazol-2-ylidene X = Cl-, BF4-, OTf-; Y = H2O and 3-hexyne] are determined. The nuclear overhauser effect nuclear magnetic resonance (NMR) experimental measurements integrated with a theoretical description of the system (full optimization of different ion pairs and calculation of the Coulomb potential surface) indicate that the preferential position of the counterion is tunable through the choice of the ancillary ligands (NHCiPr, NHCmes, ppy, and Y) in [(ppy)Au(NHC)(3-hexyne)]X2 activated complexes that undergo nucleophilic attack. The counterion can approach near NHC, pyridine ring of ppy, and gold atom. From these positions, the anion can act as a template, holding water in the right position for the outer-sphere attack, as observed in gold(I) catalysts.
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Affiliation(s)
- Jacopo Segato
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Eleonora Aneggi
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Walter Baratta
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Filippo Campagnolo
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Leonardo Belpassi
- Istituto
di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle
Ricerche c/o Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Paola Belanzoni
- Istituto
di Scienze e Tecnologie Chimiche (SCITEC), Consiglio Nazionale delle
Ricerche c/o Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università
degli Studi di Perugia, 06123 Perugia, Italy
| | - Daniele Zuccaccia
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
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6
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Ovian JM, Vojáčková P, Jacobsen EN. Enantioselective transition-metal catalysis via an anion-binding approach. Nature 2023; 616:84-89. [PMID: 36787801 PMCID: PMC10388379 DOI: 10.1038/s41586-023-05804-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 02/06/2023] [Indexed: 02/16/2023]
Abstract
Asymmetric transition-metal catalysis represents a powerful strategy for accessing enantiomerically enriched molecules1-3. The classical strategy for inducing enantioselectivity with transition-metal catalysts relies on direct complexation of chiral ligands to produce a sterically constrained reactive metal site that allows formation of the major product enantiomer while effectively inhibiting the pathway to the minor enantiomer through steric repulsion4. The chiral-ligand strategy has proven applicable to a wide variety of highly enantioselective transition-metal-catalysed reactions, but important scenarios exist that impose limits to its successful adaptation. Here, we report a new approach for inducing enantioselectivity in transition-metal-catalysed reactions that relies on neutral hydrogen-bond donors (HBDs)5,6 that bind anions of cationic transition-metal complexes to achieve enantiocontrol and rate enhancement through ion pairing together with other non-covalent interactions7-9. A cooperative anion-binding effect of a chiral bis-thiourea HBD is demonstrated to lead to high enantioselectivity (up to 99% enantiomeric excess) in intramolecular ruthenium-catalysed propargylic substitution reactions10. Experimental and computational mechanistic studies show the attractive interactions between electron-deficient arene components of the HBD and the metal complex that underlie enantioinduction and the acceleration effect.
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Affiliation(s)
- John M Ovian
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Petra Vojáčková
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA
| | - Eric N Jacobsen
- Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA.
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7
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Efforts Towards Control of Regioselectivity in the Gold(I) Catalyzed Hydration of Internal Alkynes. Effects of Solvent, Temperature and Substrate on Regioselectivity. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200812] [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]
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8
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Hobsteter A, Badajoz MA, Lo Fiego MJ, Silbestri GF. Galactopyranoside-Substituted N-Heterocyclic Carbene Gold(I) Complexes: Synthesis, Stability, and Catalytic Applications to Alkyne Hydration. ACS OMEGA 2022; 7:21788-21799. [PMID: 35785281 PMCID: PMC9245165 DOI: 10.1021/acsomega.2c01878] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
A series of novel gold(I) complexes bearing galactopyranoside-based N-heterocyclic carbene ligands have been synthesized via transmetalation of the corresponding Ag(I) complex. Gold(I) complexes have been characterized by NMR, Fourier transform infrared (FTIR), and elemental analysis. An exhaustive NMR analysis shows that the complexes are not stable when hydroxyl groups are deprotected. Catalytic studies, using the alkyne hydration as a model reaction, indicate that the synthesized complexes are active and reusable.
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9
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Mulryan D, Rodwell J, Phillips NA, Crimmin MR. Au(I) Catalyzed HF Transfer: Tandem Alkyne Hydrofluorination and Perfluoroarene Functionalization. ACS Catal 2022; 12:3411-3419. [PMID: 35433106 PMCID: PMC9007466 DOI: 10.1021/acscatal.1c05474] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 02/17/2022] [Indexed: 12/17/2022]
Abstract
![]()
HF
transfer reactions between organic substrates are potentially
useful transformations. Such reactions require the development of
catalytic systems that can promote both defluorination and fluorination
steps in a single reaction sequence. Herein, we report a catalytic
protocol in which an equivalent of HF is generated from a perfluoroarene
| nucleophile pair and transferred directly to an alkyne. The reaction
is catalyzed by [Au(IPr)NiPr2] (IPr = N,N′-1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene).
HF transfer generates two useful products in the form of functionalized
fluoroarenes and fluoroalkenes. Mechanistic studies (rate laws, KIEs,
density functional theory (DFT) calculations, competition experiments)
are consistent with the Au(I) catalyst facilitating a catalytic network
involving both concerted SNAr and hydrofluorination steps.
The nature of the nucleophile impacts the turnover-limiting step.
The cSNAr step is turnover-limiting for phenol-based nucleophiles,
while protodeuaration likely
becomes turnover-limiting for aniline-based nucleophiles. The approach
removes the need for direct handling of HF reagents in hydrofluorination
and offers possibilities to manipulate the fluorine content of organic
molecules through catalysis.
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Affiliation(s)
- Daniel Mulryan
- Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, Shepherds
Bush, London W12 0BZ, U.K
| | - Jack Rodwell
- Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, Shepherds
Bush, London W12 0BZ, U.K
| | - Nicholas A. Phillips
- Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, Shepherds
Bush, London W12 0BZ, U.K
| | - Mark R. Crimmin
- Molecular Sciences Research Hub, Imperial College London, 82 Wood Lane, Shepherds
Bush, London W12 0BZ, U.K
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10
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Unveiling the complexity of the dual gold(I) catalyzed intermolecular hydroamination of alkynes leading to vinylazoles. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2021.112090] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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11
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Gauthier R, Tzouras NV, Zhang Z, Bédard S, Saab M, Falivene L, Van Hecke K, Cavallo L, Nolan SP, Paquin JF. Gold N-Heterocyclic Carbene Catalysts for the Hydrofluorination of Alkynes Using Hydrofluoric Acid: Reaction Scope, Mechanistic Studies and the Tracking of Elusive Intermediates. Chemistry 2021; 28:e202103886. [PMID: 34739142 DOI: 10.1002/chem.202103886] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Indexed: 11/07/2022]
Abstract
An efficient and chemoselective methodology deploying gold-N-heterocyclic carbene (NHC) complexes as catalysts in the hydrofluorination of terminal alkynes using aqueous HF has been developed. Mechanistic studies shed light on an in situ generated catalyst, formed by the reaction of Brønsted basic gold pre-catalysts with HF in water, which exhibits the highest reactivity and chemoselectivity. The catalytic system has a wide alkyl substituted-substrate scope, and stoichiometric as well as catalytic reactions with tailor-designed gold pre-catalysts enable the identification of various gold species involved along the catalytic cycle. Computational studies aid in understanding the chemoselectivity observed through examination of key mechanistic steps for phosphine- and NHC-coordinated gold species bearing the triflate counterion and the elusive key complex bearing a bifluoride counterion.
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Affiliation(s)
- Raphaël Gauthier
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Nikolaos V Tzouras
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Ziyun Zhang
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Sandrine Bédard
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, G1V 0A6, Canada
| | - Marina Saab
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Laura Falivene
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Kristof Van Hecke
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Luigi Cavallo
- KAUST Catalysis Center, Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, 23955-6900, Saudi Arabia
| | - Steven P Nolan
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Jean-François Paquin
- PROTEO, CCVC, Département de chimie, Université Laval, 1045 avenue de la Médecine, Québec, QC, G1V 0A6, Canada
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12
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Escayola S, Poater J, Ramos M, Luque‐Urrutia JA, Duran J, Simon S, Solà M, Cavallo L, Nolan SP, Poater A. Chelation enforcing a dual gold configuration in the catalytic hydroxyphenoxylation of alkynes. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6362] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Sílvia Escayola
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona Girona Spain
| | - Jordi Poater
- Departament de Química Inorgànica i Orgànica and IQTCUB Universitat de Barcelona Barcelona Spain
- ICREA Barcelona Spain
| | - Miguel Ramos
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona Girona Spain
| | | | - Josep Duran
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona Girona Spain
| | - Sílvia Simon
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona Girona Spain
| | - Miquel Solà
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona Girona Spain
| | - Luigi Cavallo
- KAUST Catalysis Center (KCC) King Abdullah University of Science and Technology Thuwal Saudi Arabia
| | - Steven P. Nolan
- Department of Chemistry and Center for Sustainable Chemistry Ghent University Ghent Belgium
| | - Albert Poater
- Institut de Química Computacional i Catàlisi, Departament de Química Universitat de Girona Girona Spain
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13
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Experimental and theoretical investigation of the cycloisomerization of N-propargylcarboxamide catalyzed by NHC-Au-X in green solvents. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2021.120372] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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14
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Monitoring of the Pre-Equilibrium Step in the Alkyne Hydration Reaction Catalyzed by Au(III) Complexes: A Computational Study Based on Experimental Evidences. Molecules 2021; 26:molecules26092445. [PMID: 33922177 PMCID: PMC8122707 DOI: 10.3390/molecules26092445] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 11/18/2022] Open
Abstract
The coordination ability of the [(ppy)Au(IPr)]2+ fragment [ppy = 2-phenylpyridine, IPr = 1,3-bis(2,6-di-isopropylphenyl)-imidazol-2-ylidene] towards different anionic and neutral X ligands (X = Cl−, BF4−, OTf−, H2O, 2-butyne, 3-hexyne) commonly involved in the crucial pre-equilibrium step of the alkyne hydration reaction is computationally investigated to shed light on unexpected experimental observations on its catalytic activity. Experiment reveals that BF4− and OTf− have very similar coordination ability towards [(ppy)Au(IPr)]2+ and slightly less than water, whereas the alkyne complex could not be observed in solution at least at the NMR sensitivity. Due to the steric hindrance/dispersion interaction balance between X and IPr, the [(ppy)Au(IPr)]2+ fragment is computationally found to be much less selective than a model [(ppy)Au(NHC)]2+ (NHC = 1,3-dimethylimidazol-2-ylidene) fragment towards the different ligands, in particular OTf− and BF4−, in agreement with experiment. Effect of the ancillary ligand substitution demonstrates that the coordination ability of Au(III) is quantitatively strongly affected by the nature of the ligands (even more than the net charge of the complex) and that all the investigated gold fragments coordinate to alkynes more strongly than H2O. Remarkably, a stabilization of the water-coordinating species with respect to the alkyne-coordinating one can only be achieved within a microsolvation model, which reconciles theory with experiment. All the results reported here suggest that both the Au(III) fragment coordination ability and its proper computational modelling in the experimental conditions are fundamental issues for the design of efficient catalysts.
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15
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Sorbelli D, Segato J, Del Zotto A, Belpassi L, Zuccaccia D, Belanzoni P. The mechanism of the gold(I)-catalyzed Meyer-Schuster rearrangement of 1-phenyl-2-propyn-1-ol via 4- endo-dig cyclization. Dalton Trans 2021; 50:5154-5160. [PMID: 33710232 DOI: 10.1039/d1dt00080b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
With the aim of rationalizing the experimental counterion- and solvent-dependent reactivity in the gold(i)-catalyzed Meyer-Schuster rearrangement of 1-phenyl-2-propyn-1-ol, a computational mechanistic study unraveled the unexpected formation of a gold-oxetene intermediate via commonly unfavorable 4-endo-dig cyclization triggered by the counterion in low polarity solvents.
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Affiliation(s)
- Diego Sorbelli
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, I-06123, Perugia, Italy.
| | - Jacopo Segato
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100, Udine, Italy.
| | - Alessandro Del Zotto
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100, Udine, Italy.
| | - Leonardo Belpassi
- Institute of Chemical Sciences and Technologies "Giulio Natta" of CNR (CNR-SCITEC), c/o Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, I-06123, Perugia, Italy
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100, Udine, Italy.
| | - Paola Belanzoni
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, I-06123, Perugia, Italy. and Institute of Chemical Sciences and Technologies "Giulio Natta" of CNR (CNR-SCITEC), c/o Department of Chemistry, Biology and Biotechnology, University of Perugia, Via Elce di Sotto 8, I-06123, Perugia, Italy
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16
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Specklin D, Coffinet A, Vendier L, del Rosal I, Dinoi C, Simonneau A. Synthesis, Characterization, and Comparative Theoretical Investigation of Dinitrogen-Bridged Group 6-Gold Heterobimetallic Complexes. Inorg Chem 2021; 60:5545-5562. [PMID: 33724789 PMCID: PMC8058778 DOI: 10.1021/acs.inorgchem.0c03271] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Indexed: 01/21/2023]
Abstract
We have prepared and characterized a series of unprecedented group 6-group 11, N2-bridged, heterobimetallic [ML4(η1-N2)(μ-η1:η1-N2)Au(NHC)]+ complexes (M = Mo, W, L2 = diphosphine) by treatment of trans-[ML4(N2)2] with a cationic gold(I) complex [Au(NHC)]+. The adducts are very labile in solution and in the solid, especially in the case of molybdenum, and decomposition pathways are likely initiated by electron transfers from the zerovalent group 6 atom to gold. Spectroscopic and structural parameters point to the fact that the gold adducts are very similar to Lewis pairs formed out of strong main-group Lewis acids (LA) and low-valent, end-on dinitrogen complexes, with a bent M-N-N-Au motif. To verify how far the analogy goes, we computed the electronic structures of [W(depe)2(η1-N2)(μ-η1:η1-N2)AuNHC]+ (10W+) and [W(depe)2(η1-N2)(μ-η1:η1-N2)B(C6F5)3] (11W). A careful analysis of the frontier orbitals of both compounds shows that a filled orbital resulting from the combination of the π* orbital of the bridging N2 with a d orbital of the group 6 metal overlaps in 10W+ with an empty sd hybrid orbital at gold, whereas in 11W with an sp3 hybrid orbital at boron. The bent N-N-LA arrangement maximizes these interactions, providing a similar level of N2 "push-pull" activation in the two compounds. In the gold case, the HOMO-2 orbital is further delocalized to the empty carbenic p orbital, and an NBO analysis suggests an important electrostatic component in the μ-N2-[Au(NHC)]+ bond.
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Affiliation(s)
- David Specklin
- LCC−CNRS,
Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France
| | - Anaïs Coffinet
- LCC−CNRS,
Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France
| | - Laure Vendier
- LCC−CNRS,
Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France
| | - Iker del Rosal
- LPCNO,
CNRS, and INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Chiara Dinoi
- LPCNO,
CNRS, and INSA, Université Paul Sabatier, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Antoine Simonneau
- LCC−CNRS,
Université de Toulouse, CNRS, UPS, 205 route de Narbonne, BP44099, F-31077 Toulouse cedex 4, France
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17
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Marsicano V, Arcadi A, Aschi M, Michelet V. Experimental and computational evidence on gold-catalyzed regioselective hydration of phthalimido-protected propargylamines: an entry to β-amino ketones. Org Biomol Chem 2020; 18:9438-9447. [PMID: 33057554 DOI: 10.1039/d0ob01598a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The results of our investigations on the Au-catalyzed regioselective hydration reaction of both alkyl- and aryl-substituted N-propargyl phthalimides directed to the selective formation of the corresponding β-phthalimido ketones are described. Experimental data, in particular the observed regioselectivity, have been qualitatively supported by quantum-chemical calculations carried out on model systems in the framework of Density Functional Theory (DFT) followed by quantum theory of atoms in molecules (QTAIMS). Our results suggest that the electronic features of the initial adduct between the propargyl triple bond and the Au(i) catalyst, in particular the character of the gold-triple bond interaction, are essential for the observed regioselectivity. Other effects, such as the presence of the solvent and the formation of a H-bond between the water molecule and the phthalimido moiety, although apparently irrelevant for the regioselectivity, have proven to be kinetically and catalytically rather important.
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Affiliation(s)
- Vincenzo Marsicano
- Dipartimento di Scienze Fisiche e Chimiche Università degli Studi di L'Aquila, Via Vetoio, 67100 Coppito (AQ), Italy.
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18
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Abstract
An overview of the current state of mechanistic understanding of gold-catalyzed intermolecular alkyne hydrofunctionalization reactions is presented. Moving from the analysis of the main features of the by-now-generally accepted reaction mechanism, studies and evidences pointing out the mechanistic peculiarities of these reactions using different nucleophiles HNu that add to the alkyne triple bond are presented and discussed. The effects of the nature of the employed alkyne substrate and of the gold catalyst (employed ligands, counteranions, gold oxidation state), of additional additives and of the reaction conditions are also considered. Aim of this work is to provide the reader with a detailed mechanistic knowledge of this important reaction class, which will be invaluable for rapidly developing and optimizing synthetic protocols involving a gold-catalyzed alkyne hydrofunctionalization as a reaction step.
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19
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Öztürk BÖ, Çetinel B, Karabulut Şehitoğlu S. Encapsulation of
N
‐heterocyclic carbene–gold (I) catalysts within magnetic core/shell silica gels: A reusable alkyne hydration catalyst. Appl Organomet Chem 2020. [DOI: 10.1002/aoc.5686] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Bengi Özgün Öztürk
- Faculty of Science, Chemistry DepartmentHacettepe University Beytepe‐Ankara 06800 Turkey
| | - Begüm Çetinel
- Faculty of Science, Chemistry DepartmentHacettepe University Beytepe‐Ankara 06800 Turkey
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20
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Tzouras NV, Saab M, Janssens W, Cauwenbergh T, Van Hecke K, Nahra F, Nolan SP. Simple Synthetic Routes to N-Heterocyclic Carbene Gold(I)-Aryl Complexes: Expanded Scope and Reactivity. Chemistry 2020; 26:5541-5551. [PMID: 32077182 DOI: 10.1002/chem.202000876] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Indexed: 12/31/2022]
Abstract
The discovery of sustainable and scalable synthetic protocols leading to gold-aryl compounds bearing N-heterocyclic carbene (NHC) ligands sparked an investigation of their reactivity and potential utility as organometallic synthons. The use of a mild base and green solvents provide access to these compounds, starting from widely available boronic acids and various [Au(NHC)Cl] complexes, with reactions taking place under air, at room temperature and leading to high yields with unprecedented ease. One compound, (N,N'-bis[2,6-(di-isopropyl)phenyl]imidazol-2-ylidene)(4-methoxyphenyl)gold, ([Au(IPr)(4-MeOC6 H4 )]), was synthesized on a multigram scale and used to gauge the reactivity of this class of compounds towards C-H/N-H bonds and with various acids, revealing simple pathways to gold-based species that possess attractive properties as materials, reagents and/or catalysts.
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Affiliation(s)
- Nikolaos V Tzouras
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Marina Saab
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Wim Janssens
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Thibault Cauwenbergh
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Kristof Van Hecke
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
| | - Fady Nahra
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
- Separation and Conversion Technology Unit, VITO (Flemish Institute for Technological Research), Boeretang 200, 2400, Mol, Belgium
| | - Steven P Nolan
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000, Ghent, Belgium
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21
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Ramos M, Poater J, Villegas‐Escobar N, Gimferrer M, Toro‐Labbé A, Cavallo L, Poater A. Phenoxylation of Alkynes through Mono‐ and Dual Activation Using Group 11 (Cu, Ag, Au) Catalysts. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.201901220] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Miguel Ramos
- Institut de Química Computacional i Catàlisi Departament de Química Universitat de Girona c/ Maria Aurèlia Capmany 69 17003 Girona Catalonia Spain
| | - Jordi Poater
- Departament de Química Inorgànica i Orgànica & IQTCUB Universitat de Barcelona Martí i Franquès 1–11 08028 Barcelona Spain
- ICREA Pg. Lluís Companys 23 08010 Barcelona Spain
| | - Nery Villegas‐Escobar
- Laboratorio de Química Teórica Computacional (QTC) Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile Avenida Vicuña Mackenna 4860 7820436 Santiago Chile
| | - Martí Gimferrer
- Institut de Química Computacional i Catàlisi Departament de Química Universitat de Girona c/ Maria Aurèlia Capmany 69 17003 Girona Catalonia Spain
| | - Alejandro Toro‐Labbé
- Laboratorio de Química Teórica Computacional (QTC) Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile Avenida Vicuña Mackenna 4860 7820436 Santiago Chile
| | - Luigi Cavallo
- King Abdullah University of Science & Technology KAUST Catalysis Center (KCC) 23955–6900 Thuwal Saudi Arabia
| | - Albert Poater
- Institut de Química Computacional i Catàlisi Departament de Química Universitat de Girona c/ Maria Aurèlia Capmany 69 17003 Girona Catalonia Spain
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22
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Segato J, Del Zotto A, Belpassi L, Belanzoni P, Zuccaccia D. Hydration of alkynes catalyzed by [Au(X)(L)(ppy)]X in the green solvent γ-valerolactone under acid-free conditions: the importance of the pre-equilibrium step. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01343a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Stable and robust [Au(H2O)(NHC)(ppy)](X)2 successfully catalyses the hydration of alkynes in GVL, under acid-free conditions. DFT calculation and NMR measurements suggest that pre-equilibrium is the key step of the whole process.
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Affiliation(s)
- Jacopo Segato
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali
- Sezione di Chimica
- Università di Udine
- I-33100 Udine
- Italy
| | - Alessandro Del Zotto
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali
- Sezione di Chimica
- Università di Udine
- I-33100 Udine
- Italy
| | - Leonardo Belpassi
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
- Consiglio Nazionale delle Ricerche c/o
- Dipartimento di Chimica, Biologia e Biotecnologie
- Università degli Studi di Perugia
- 06123 Perugia
| | - Paola Belanzoni
- Istituto di Scienze e Tecnologie Chimiche “Giulio Natta” (SCITEC)
- Consiglio Nazionale delle Ricerche c/o
- Dipartimento di Chimica, Biologia e Biotecnologie
- Università degli Studi di Perugia
- 06123 Perugia
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali
- Sezione di Chimica
- Università di Udine
- I-33100 Udine
- Italy
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23
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Hydroalkoxylation of Terminal and Internal Alkynes Catalyzed by Dinuclear Gold(I) Complexes with Bridging Di(N-Heterocyclic Carbene) Ligands. Catalysts 2019. [DOI: 10.3390/catal10010001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
A series of six dinuclear gold(I) complexes with bridging bidentate N-heterocycic carbene ligands (NHCs) of general formula Au2Br2LX (L = diNHC, X = 1–6) have been studied as catalysts in the intermolecular hydroalkoxylation of terminal and internal alkynes. The best catalytic results have been obtained by using Au2Br2L4, characterized by 2,6-diisopropylphenyl wingtip substituents and a methylene bridging group between the two NHC donors. Complex Au2Br2L4 has been structurally characterized for the first time in this work, showing the presence of intramolecular aurophiclic interaction in the solid state. In the adopted reaction conditions Au2Br2L4 is able to convert challenging substrates such as diphenylacetylene. Comparative catalytic tests by using the mononuclear gold(I) complexes AuIL7 and IPrAuCl have been performed in order to determine the possible presence of cooperative effects in the catalytic process.
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24
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The pivotal role of the counterion in gold catalyzed hydration and alkoxylation of alkynes. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.06.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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25
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Fernández-Pulido Y, López R, Menéndez MI. Gold(I)-catalyzed intermolecular dioxolane addition to alkynes: the role of water. Theor Chem Acc 2019. [DOI: 10.1007/s00214-019-2460-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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26
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Shiga K, Gridnev ID, Terada M, Nakamura I. Au-catalyzed skeletal rearrangement of O-propargylic oximes via N-O bond cleavage with the aid of a Brønsted base cocatalyst. Chem Sci 2019; 10:5283-5289. [PMID: 31191884 PMCID: PMC6540908 DOI: 10.1039/c9sc00501c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 04/16/2019] [Indexed: 12/24/2022] Open
Abstract
Au-catalyzed skeletal rearrangement reaction of O-propargylic oxime proceeded via N–O bond cleavage with the aid of a Brønsted base cocatalyst.
O-Propargylic oximes that possess an electron-withdrawing aryl group on the oxime moiety undergo Au-catalyzed skeletal rearrangements via N–O bond cleavage to afford the corresponding 2H-1,3-oxazine derivatives. Our studies show that the inclusion of a Brønsted base cocatalyst not only accelerates the reaction but also switches pathways of the skeletal rearrangement reaction, realizing divergent synthesis of heterocyclic compounds. Computational studies indicate that the elimination of propargylic proton in the cyclized vinylgold intermediate is rate-determining and both electron-withdrawing substituents at the oxime moiety and base cocatalyst facilitate the proton elimination. Moreover, the protodeauration process proceeds stepwise involving N–O bond cleavage followed by recyclization to construct the oxazine core.
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Affiliation(s)
- Keigo Shiga
- Department of Chemistry , Graduate School of Science , Tohoku University , Sendai , 980-8578 , Japan
| | - Ilya D Gridnev
- Department of Chemistry , Graduate School of Science , Tohoku University , Sendai , 980-8578 , Japan
| | - Masahiro Terada
- Department of Chemistry , Graduate School of Science , Tohoku University , Sendai , 980-8578 , Japan
| | - Itaru Nakamura
- Research and Analytical Center for Giant Molecules , Graduate School of Science , Tohoku University , Sendai , 980-8578 , Japan .
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27
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Marrazzini G, Gabbiani C, Ciancaleoni G. Interplay between Gold(I)-Ligand Bond Components and Hydrogen Bonding: A Combined Experimental/Computational Study. ACS OMEGA 2019; 4:1344-1353. [PMID: 31459403 PMCID: PMC6647975 DOI: 10.1021/acsomega.8b03330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Accepted: 01/03/2019] [Indexed: 06/10/2023]
Abstract
The influence of weak interactions on the donation/back-donation bond components in the complex [(NHC)Au(SeU)]+ (NHC = N-heterocyclic carbene; SeU = selenourea) has been studied by coupling experimental and theoretical techniques. In particular, NMR 1H and pulsed-field gradient spin-echo titrations allowed us to characterize the hydrogen bond (HB) between the -NH2 moieties of SeU and the anions PF6 - and ClO4 -, whereas 77Se NMR spectroscopy allowed us to characterize the Au-Se bond. Theoretically, the Au-Se and Au-C orbital interactions have been decomposed using the natural orbital for the chemical valence framework and the bond components quantified through the charge displacement analysis. This methodology provides the quantification of the Dewar-Chatt-Duncanson (DCD) components for the Au-C and Au-Se bonds in the absence and presence of the second-sphere HB. The results presented here show that the anion has a dual mode action: it modifies the conformation of the cation by ion pairing (and this already influences the DCD components) and it induces new polarization effects that depend on the relative anion/cation relative orientation. The perchlorate polarizes SeU, enhancing the Se → Au σ donation and the Au → C back-donation and depressing the C → Au σ donation. On the contrary, the hexafluorophosphate depresses both the Se → Au and C → Au σ donations.
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28
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Wozniak DI, Hicks AJ, Sabbers WA, Dobereiner GE. Imidazolyl-phenyl (IMP) anions: a modular structure for tuning solubility and coordinating ability. Dalton Trans 2019; 48:14138-14155. [DOI: 10.1039/c9dt03511g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The effect of counteranion upon a cation's solution-phase reactivity depends on a subtle interplay of weak interactions.
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29
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Gatto M, Del Zotto A, Segato J, Zuccaccia D. Hydration of Alkynes Catalyzed by L–Au–X under Solvent- and Acid-Free Conditions: New Insights into an Efficient, General, and Green Methodology. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00689] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mattia Gatto
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Alessandro Del Zotto
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Jacopo Segato
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Daniele Zuccaccia
- Dipartimento di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
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30
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Schießl J, Schulmeister J, Doppiu A, Wörner E, Rudolph M, Karch R, Hashmi ASK. An Industrial Perspective on Counter Anions in Gold Catalysis: On Alternative Counter Anions. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201800629] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Jasmin Schießl
- Innovam; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Jürgen Schulmeister
- Innovam; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Angelino Doppiu
- Umicore AG & Co. KG; Rodenbacher Chaussee 4, D- 63457 Hanau-Wolfgang Germany
| | - Eileen Wörner
- Umicore AG & Co. KG; Rodenbacher Chaussee 4, D- 63457 Hanau-Wolfgang Germany
| | | | - Ralf Karch
- Umicore AG & Co. KG; Rodenbacher Chaussee 4, D- 63457 Hanau-Wolfgang Germany
| | - A. Stephen K. Hashmi
- Innovam; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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31
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Harris RJ, Carden RG, Duncan AN, Widenhoefer RA. Kinetics and Mechanism of the Gold-Catalyzed Intermolecular Hydroalkoxylation of Allenes with Alcohols. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02211] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Robert J. Harris
- Department of Chemistry, French Family Science
Center, Duke University, Durham, North Carolina 27708, United States
| | - Robert G. Carden
- Department of Chemistry, French Family Science
Center, Duke University, Durham, North Carolina 27708, United States
| | - Alethea N. Duncan
- Department of Chemistry, French Family Science
Center, Duke University, Durham, North Carolina 27708, United States
| | - Ross A. Widenhoefer
- Department of Chemistry, French Family Science
Center, Duke University, Durham, North Carolina 27708, United States
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32
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De Canck E, Nahra F, Bevernaege K, Vanden Broeck S, Ouwehand J, Maes D, Nolan SP, Van Der Voort P. PMO-Immobilized Au I -NHC Complexes: Heterogeneous Catalysts for Sustainable Processes. Chemphyschem 2018; 19:430-436. [PMID: 29115710 DOI: 10.1002/cphc.201701102] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Indexed: 12/14/2022]
Abstract
A stable periodic mesoporous organosilica (PMO) with accessible sulfonic acid functionalities is prepared via a one-pot-synthesis and is used as solid support for highly active catalysts, consisting of gold(I)-N-heterocyclic carbene (NHC) complexes. The gold complexes are successfully immobilized on the nanoporous hybrid material via a straightforward acid-base reaction with the corresponding [Au(OH)(NHC)] synthon. This catalyst design strategy results in a boomerang-type catalyst, allowing the active species to detach from the surface to perform the catalysis and then to recombine with the solid after all the starting material is consumed. This boomerang behavior is assessed in the hydration of alkynes. The tested catalysts were found to be active in the latter reaction, and after an acidic work-up, the IPr*-based gold catalyst can be recovered and then reused several times without any loss in efficiency.
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Affiliation(s)
- Els De Canck
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Fady Nahra
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Kevin Bevernaege
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium.,Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Sofie Vanden Broeck
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Judith Ouwehand
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Diederick Maes
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium.,Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
| | - Pascal Van Der Voort
- Center for Ordered Materials, Organometallics and Catalysis (COMOC), Department of Chemistry, Ghent University, Campus Sterre, Krijgslaan 281-Building S3, 9000, Ghent, Belgium
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33
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González-Belman OF, Jiménez-Halla JOC, Nahra F, Cazin CSJ, Poater A. The role of the metal in the dual-metal catalysed hydrophenoxylation of diphenylacetylene. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00510a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Computational studies on homo- and heterobimetallic group 11 metal-NHC complexes were carried out, providing insights into the catalysed-hydrophenoxylation of alkynes.
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Affiliation(s)
- Oscar F. González-Belman
- Institut de Química Computacional i Catàlisi
- Departament de Química
- University de Girona
- 17003 Girona
- Spain
| | | | - Fady Nahra
- Department of Chemistry
- Centre for Sustainable Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - Catherine S. J. Cazin
- Department of Chemistry
- Centre for Sustainable Chemistry
- Ghent University
- 9000 Gent
- Belgium
| | - Albert Poater
- Institut de Química Computacional i Catàlisi
- Departament de Química
- University de Girona
- 17003 Girona
- Spain
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34
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Nair AG, McBurney RT, Gatus MRD, Binding SC, Messerle BA. Gold(III) NHC Complexes for Catalyzing Dihydroalkoxylation and Hydroamination Reactions. Inorg Chem 2017; 56:12067-12075. [PMID: 28933838 DOI: 10.1021/acs.inorgchem.7b02161] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A gold(III) complex of an N-heterocyclic carbene based hemilabile ligand with two pendant pyrazole arms (1,3-bis((1H-pyrazol-3-yl)methyl)-2,3-dihydro-1H-imidazole, LH) was synthesized. Complex [LAu(III)Cl3] is an excellent catalyst for promoting dihydroalkoxylation at room temperature, even catalyzing this reaction at 0 °C. [LAu(III)Cl3] is one of the most efficient catalysts reported to date for the spirocyclization of alkynyl diols. Furthermore, [LAu(III)Cl3] catalyzed intra- and intermolecular hydroamination reactions, achieving good to excellent conversions. [LAu(III)Cl3] is a more efficient catalyst than a gold(I) analogue, [LAu(I)Cl]. The dependence of the quantity of weakly coordinating anion [BArF4]- ((3,5-trifluoromethyl)phenyl borate) present on catalysis efficiency was probed for the dihydroalkoxylation reaction. X-ray diffraction analysis of single crystals demonstrated the solid-state structure of gold complexes [LAu(III)Cl3] and [LAu(I)Cl], which displayed the expected square-planar and linear coordination geometries, respectively.
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Affiliation(s)
- Ashwin G Nair
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Roy T McBurney
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Mark R D Gatus
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Samantha C Binding
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
| | - Barbara A Messerle
- Department of Chemistry and Biomolecular Sciences, Macquarie University , Sydney 2109, Australia
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35
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Veenboer RMP, Collado A, Dupuy S, Lebl T, Falivene L, Cavallo L, Cordes DB, Slawin AMZ, Cazin CSJ, Nolan SP. Inner-Sphere versus Outer-Sphere Coordination of BF4– in a NHC-Gold(I) Complex. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00345] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Richard M. P. Veenboer
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, United Kingdom
| | - Alba Collado
- EaStCHEM,
School of Chemistry, University of Edinburgh, Joseph Black Building, David Brewster
Road, Edinburgh EH9 3FJ, United Kingdom
| | - Stéphanie Dupuy
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, United Kingdom
| | - Tomas Lebl
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, United Kingdom
| | - Laura Falivene
- Physical
Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - Luigi Cavallo
- Physical
Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal, Saudi Arabia
| | - David B. Cordes
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, United Kingdom
| | - Alexandra M. Z. Slawin
- EaStCHEM,
School of Chemistry, University of St Andrews, North Haugh, St Andrews KY16 9ST, United Kingdom
| | - Catherine S. J. Cazin
- Department
of Inorganic and Physical Chemistry, Ghent University, Building S3, Krijgslaan 281, 9000 Gent, Belgium
| | - Steven P. Nolan
- Department
of Inorganic and Physical Chemistry, Ghent University, Building S3, Krijgslaan 281, 9000 Gent, Belgium
- Department
of Chemistry, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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36
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D’Amore L, Ciancaleoni G, Belpassi L, Tarantelli F, Zuccaccia D, Belanzoni P. Unraveling the Anion/Ligand Interplay in the Reaction Mechanism of Gold(I)-Catalyzed Alkoxylation of Alkynes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00377] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Lorenzo D’Amore
- Institut
de Química Computacional i Catàlisi (IQCC), Departament
de Química, Universitat de Girona, Campus Montilivi, 17003 Girona, Catalonia, Spain
| | - Gianluca Ciancaleoni
- Dipartimento
di Chimica e Chimica Industriale, Università di Pisa, via Giuseppe
Moruzzi 13, I-56124 Pisa, Italy
| | - Leonardo Belpassi
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università di Perugia, via Elce
di Sotto 8, I-06123 Perugia, Italy
| | - Francesco Tarantelli
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università di Perugia, via Elce
di Sotto 8, I-06123 Perugia, Italy
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università di Perugia, via Elce
di Sotto 8, I-06123 Perugia, Italy
| | - Daniele Zuccaccia
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, via Cotonificio 108, I-33100 Udine, Italy
| | - Paola Belanzoni
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università di Perugia, via Elce
di Sotto 8, I-06123 Perugia, Italy
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università di Perugia, via Elce
di Sotto 8, I-06123 Perugia, Italy
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37
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Gaggioli CA, Bistoni G, Ciancaleoni G, Tarantelli F, Belpassi L, Belanzoni P. Modulating the Bonding Properties of N-Heterocyclic Carbenes (NHCs): A Systematic Charge-Displacement Analysis. Chemistry 2017; 23:7558-7569. [DOI: 10.1002/chem.201700638] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Carlo Alberto Gaggioli
- Dipartimento di Chimica, Biologia e Biotecnologie; Università degli Studi di Perugia; Via Elce di Sotto 8 06123 Perugia Italy
| | - Giovanni Bistoni
- Max Planck Institute for Chemical Energy Conversion; Stiftstrasse 34-36 45470 Mülheim an der Ruhr Germany
| | - Gianluca Ciancaleoni
- Dipartimento di Chimica e Chimica Industriale; Università di Pisa; via Giuseppe Moruzzi 13 56124 Pisa Italy
| | - Francesco Tarantelli
- Dipartimento di Chimica, Biologia e Biotecnologie; Università degli Studi di Perugia; Via Elce di Sotto 8 06123 Perugia Italy
- Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) c/o Dipartimento di Chimica, Biologia e Biotecnologie; Università degli Studi di Perugia; via Elce di Sotto 8 06123 Perugia Italy
| | - Leonardo Belpassi
- Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) c/o Dipartimento di Chimica, Biologia e Biotecnologie; Università degli Studi di Perugia; via Elce di Sotto 8 06123 Perugia Italy
| | - Paola Belanzoni
- Dipartimento di Chimica, Biologia e Biotecnologie; Università degli Studi di Perugia; Via Elce di Sotto 8 06123 Perugia Italy
- Istituto di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM) c/o Dipartimento di Chimica, Biologia e Biotecnologie; Università degli Studi di Perugia; via Elce di Sotto 8 06123 Perugia Italy
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38
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Li H, Liu J, Abosede A. O, Bao X. Computational insights into the mechanisms of Au(i)-catalysed intramolecular addition of the hydroxylamine group onto alkynes. Org Chem Front 2017. [DOI: 10.1039/c7qo00072c] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Computational studies were carried out to understand the reaction mechanisms and the origin of the substrate-dependent chemo- and regio-selectivities of the Au(i)-catalysed intramolecular addition of the hydroxylamine group onto alkynes.
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Affiliation(s)
- Hongli Li
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Jiajun Liu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Ogunlana Abosede A.
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
| | - Xiaoguang Bao
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou
- China
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39
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Casals-Cruañas È, González-Belman OF, Besalú-Sala P, Nelson DJ, Poater A. The preference for dual-gold(i) catalysis in the hydro(alkoxylation vs. phenoxylation) of alkynes. Org Biomol Chem 2017; 15:6416-6425. [DOI: 10.1039/c7ob01457k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dinuclear gold complexes and their use in catalysis have received significant recent attention, but there are few critical comparisons of mono- versus dual gold-catalysed pathways.
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Affiliation(s)
- Èric Casals-Cruañas
- Institut de Química Computacional i Catàlisi
- Departament de Química
- University de Girona
- 17003 Girona
- Spain
| | - Oscar F. González-Belman
- Institut de Química Computacional i Catàlisi
- Departament de Química
- University de Girona
- 17003 Girona
- Spain
| | - Pau Besalú-Sala
- Institut de Química Computacional i Catàlisi
- Departament de Química
- University de Girona
- 17003 Girona
- Spain
| | - David J. Nelson
- WestCHEM Department of Pure and Applied Chemistry
- University of Strathclyde
- Glasgow
- UK
| | - Albert Poater
- Institut de Química Computacional i Catàlisi
- Departament de Química
- University de Girona
- 17003 Girona
- Spain
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40
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Brill M, Nahra F, Gómez-Herrera A, Zinser C, Cordes DB, Slawin AMZ, Nolan SP. Gold-N-Heterocyclic Carbene Complexes of Mineral Acids. ChemCatChem 2016. [DOI: 10.1002/cctc.201601290] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Marcel Brill
- EaStCHEM School of Chemistry; University of St Andrews; St Andrews KY16 9ST UK
| | - Fady Nahra
- Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
| | | | - Caroline Zinser
- EaStCHEM School of Chemistry; University of St Andrews; St Andrews KY16 9ST UK
| | - David B. Cordes
- EaStCHEM School of Chemistry; University of St Andrews; St Andrews KY16 9ST UK
| | | | - Steven P. Nolan
- Department of Inorganic and Physical Chemistry; Ghent University; Krijgslaan 281-S3 9000 Gent Belgium
- Chemistry Department, College of Science; King Saud University; P.O. Box 2455 Riyadh 11451 Saudi Arabia
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41
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Zhu Y, Zhou W, Petryna EM, Rogers BR, Day CS, Jones AC. Insights into Alkene Activation by Gold: Nucleophile Activation with Base as a Trigger for Generation of Lewis Acidic Gold. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01674] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yuyang Zhu
- Department
of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, North Carolina 27109, United States
| | - Wentong Zhou
- Department
of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, North Carolina 27109, United States
| | - Ellen M. Petryna
- Department
of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, North Carolina 27109, United States
| | - Brock R. Rogers
- Department
of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, North Carolina 27109, United States
| | - Cynthia S. Day
- Department
of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, North Carolina 27109, United States
| | - Amanda C. Jones
- Department
of Chemistry, Wake Forest University, Salem Hall, Box 7486, Winston-Salem, North Carolina 27109, United States
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42
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Gatto M, Belanzoni P, Belpassi L, Biasiolo L, Del Zotto A, Tarantelli F, Zuccaccia D. Solvent-, Silver-, and Acid-Free NHC-Au-X Catalyzed Hydration of Alkynes. The Pivotal Role of the Counterion. ACS Catal 2016. [DOI: 10.1021/acscatal.6b01626] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Mattia Gatto
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Paola Belanzoni
- Dipartimento
di Chimica, Biologia e Biotecnologie, Universita’ degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Universita’ degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Leonardo Belpassi
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Universita’ degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Luca Biasiolo
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Alessandro Del Zotto
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
| | - Francesco Tarantelli
- Dipartimento
di Chimica, Biologia e Biotecnologie, Universita’ degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Universita’ degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Daniele Zuccaccia
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Universita’ degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
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43
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Jaroschik F, Simonneau A, Lemière G, Cariou K, Agenet N, Amouri H, Aubert C, Goddard JP, Lesage D, Malacria M, Gimbert Y, Gandon V, Fensterbank L. Assessing Ligand and Counterion Effects in the Noble Metal Catalyzed Cycloisomerization Reactions of 1,6-Allenynes: a Combined Experimental and Theoretical Approach. ACS Catal 2016. [DOI: 10.1021/acscatal.5b02696] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Florian Jaroschik
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Antoine Simonneau
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Gilles Lemière
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Kevin Cariou
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Nicolas Agenet
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Hani Amouri
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Corinne Aubert
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Jean-Philippe Goddard
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Denis Lesage
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Max Malacria
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
| | - Yves Gimbert
- Université Grenoble Alpes and CNRS, DCM (UMR 5250), F-38000 Grenoble, France
| | - Vincent Gandon
- Institut
de Chimie Moléculaire et des Matériaux d’Orsay,
CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay, Bâtiment
420, 91405 Orsay cedex, France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC Univ Paris 06 and
CNRS, IPCM (UMR 8232), F-75005 Paris, France
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44
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Gaggioli CA, Ciancaleoni G, Zuccaccia D, Bistoni G, Belpassi L, Tarantelli F, Belanzoni P. Strong Electron-Donating Ligands Accelerate the Protodeauration Step in Gold(I)-Catalyzed Reactions: A Quantitative Understanding of the Ligand Effect. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00346] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Carlo Alberto Gaggioli
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Gianluca Ciancaleoni
- Departamento
de Química, Universidade Federal de Santa Catarina, 88040-900 Florianópolis, Brazil
| | - Daniele Zuccaccia
- Dipartimento
di Scienze Agroalimentari, Ambientali e Animali, Sezione di Chimica, Università di Udine, Via Cotonificio 108, I-33100 Udine, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Giovanni Bistoni
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
- Max Planck Institute for Chemical Energy Conversion, Stiftstraße 34-36, 45470 Mülheim an der Ruhr, Germany
| | - Leonardo Belpassi
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Francesco Tarantelli
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Paola Belanzoni
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
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45
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Brooner REM, Brown TJ, Chee MA, Widenhoefer RA. Effect of Substitution, Ring Size, and Counterion on the Intermediates Generated in the Gold-Catalyzed Intramolecular Hydroalkoxylation of Allenes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00306] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Rachel E. M. Brooner
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
| | - Timothy J. Brown
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
| | - Mark A. Chee
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
| | - Ross A. Widenhoefer
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
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46
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Trinchillo M, Belanzoni P, Belpassi L, Biasiolo L, Busico V, D’Amora A, D’Amore L, Del Zotto A, Tarantelli F, Tuzi A, Zuccaccia D. Extensive Experimental and Computational Study of Counterion Effect in the Reaction Mechanism of NHC-Gold(I)-Catalyzed Alkoxylation of Alkynes. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00925] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Marina Trinchillo
- Dipartimento
di Scienze Chimiche, Università Federico II di Napoli, Via Cintia
4, Complesso Universitario di Monte Sant’Angelo, I-80126 Napoli, Italy
| | - Paola Belanzoni
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Leonardo Belpassi
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Luca Biasiolo
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
- Dipartimento
di Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio
108, I-33100 Udine, Italy
| | - Vincenzo Busico
- Dipartimento
di Scienze Chimiche, Università Federico II di Napoli, Via Cintia
4, Complesso Universitario di Monte Sant’Angelo, I-80126 Napoli, Italy
| | - Angela D’Amora
- Dipartimento
di Scienze Chimiche, Università Federico II di Napoli, Via Cintia
4, Complesso Universitario di Monte Sant’Angelo, I-80126 Napoli, Italy
| | - Lorenzo D’Amore
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Alessandro Del Zotto
- Dipartimento
di Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio
108, I-33100 Udine, Italy
| | - Francesco Tarantelli
- Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, Via Elce di Sotto 8, I-06123 Perugia, Italy
- Istituto
di Scienze e Tecnologie Molecolari del CNR (CNR-ISTM), c/o Dipartimento
di Chimica, Biologia e Biotecnologie, Università degli Studi di Perugia, via Elce di Sotto 8, I-06123 Perugia, Italy
| | - Angela Tuzi
- Dipartimento
di Scienze Chimiche, Università Federico II di Napoli, Via Cintia
4, Complesso Universitario di Monte Sant’Angelo, I-80126 Napoli, Italy
| | - Daniele Zuccaccia
- Dipartimento
di Chimica, Fisica e Ambiente, Università di Udine, Via Cotonificio
108, I-33100 Udine, Italy
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47
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Rocchigiani L, Macchioni A. Disclosing the multi-faceted world of weakly interacting inorganic systems by means of NMR spectroscopy. Dalton Trans 2016; 45:2785-90. [DOI: 10.1039/c5dt04620c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The potential of NMR spectroscopy to investigate inorganic systems whose structure and reactivity is affected by non-covalent interactions is described; supramolecular assemblies based on relatively unusual intermolecular forces or on more classical ones, still rather unexplored in solution, are considered.
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Affiliation(s)
| | - Alceo Macchioni
- Department of Chemistry
- Biology and Biotechnology and CIRCC
- University of Perugia
- Perugia
- Italy
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48
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Fernández GA, Chopa AB, Silbestri GF. A structure/catalytic activity study of gold(i)–NHC complexes, as well as their recyclability and reusability, in the hydration of alkynes in aqueous medium. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01278c] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Comparative studies were carried out with the addition of different silver salts. Our results indicate that the bulkier complex is the most effective and that the addition of methanol as co-solvent not only shortens reaction times but also stabilizes the less bulky complexes.
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Affiliation(s)
- Gabriela A. Fernández
- Instituto de Química del Sur (INQUISUR)
- Departamento de Química
- Universidad Nacional del Sur
- B8000CPB Bahía Blanca
- Argentina
| | - Alicia B. Chopa
- Instituto de Química del Sur (INQUISUR)
- Departamento de Química
- Universidad Nacional del Sur
- B8000CPB Bahía Blanca
- Argentina
| | - Gustavo F. Silbestri
- Instituto de Química del Sur (INQUISUR)
- Departamento de Química
- Universidad Nacional del Sur
- B8000CPB Bahía Blanca
- Argentina
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49
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Roşca DA, Wright JA, Bochmann M. An element through the looking glass: exploring the Au-C, Au-H and Au-O energy landscape. Dalton Trans 2015; 44:20785-807. [PMID: 26584519 PMCID: PMC4669034 DOI: 10.1039/c5dt03930d] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 11/12/2015] [Indexed: 11/21/2022]
Abstract
Gold, the archetypal "noble metal", used to be considered of little interest in catalysis. It is now clear that this was a misconception, and a multitude of gold-catalysed transformations has been reported. However, one consequence of the long-held view of gold as inert metal is that its organometallic chemistry contains many "unknowns", and catalytic cycles devised to explain gold's reactivity draw largely on analogies with other transition metals. How realistic are such mechanistic assumptions? In the last few years a number of key compound classes have been discovered that can provide some answers. This Perspective attempts to summarise these developments, with particular emphasis on recently discovered gold(iii) complexes with bonds to hydrogen, oxygen, alkenes and CO ligands.
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Affiliation(s)
- Dragoş-Adrian Roşca
- School of Chemistry , University of East Anglia , Norwich , NR4 7TJ , UK . ; Tel: +44 (0)16035 92044
- Max-Planck-Institut für Kohlenforschung , D-45470 Mülheim/Ruhr , Germany
| | - Joseph A. Wright
- School of Chemistry , University of East Anglia , Norwich , NR4 7TJ , UK . ; Tel: +44 (0)16035 92044
| | - Manfred Bochmann
- School of Chemistry , University of East Anglia , Norwich , NR4 7TJ , UK . ; Tel: +44 (0)16035 92044
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50
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Gómez-Suárez A, Oonishi Y, Martin AR, Vummaleti SVC, Nelson DJ, Cordes DB, Slawin AMZ, Cavallo L, Nolan SP, Poater A. On the Mechanism of the Digold(I)-Hydroxide-Catalysed Hydrophenoxylation of Alkynes. Chemistry 2015; 22:1125-32. [DOI: 10.1002/chem.201503097] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Indexed: 12/26/2022]
Affiliation(s)
- Adrián Gómez-Suárez
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews, Fife KY16 9ST UK
| | - Yoshihiro Oonishi
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews, Fife KY16 9ST UK
- Faculty of Pharmaceutical Sciences; Hokkaido University; Sapporo 060-0812 Japan
| | - Anthony R. Martin
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews, Fife KY16 9ST UK
- Institut de Chimie de Nice; UMR 7272; Université de Nice Sophia Antipolis, CNRS; Parc Valrose 06108 Nice cedex 2 France
| | - Sai V. C. Vummaleti
- KAUST Catalysis Center; Physical Sciences and Engineering Division; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - David J. Nelson
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews, Fife KY16 9ST UK
- WestCHEM Department of Pure & Applied Chemistry; University of Strathclyde, Thomas Graham Building; 295 Cathedral Street Glasgow G1 1XL UK
| | - David B. Cordes
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews, Fife KY16 9ST UK
| | - Alexandra M. Z. Slawin
- EaStCHEM School of Chemistry; University of St. Andrews; North Haugh St. Andrews, Fife KY16 9ST UK
| | - Luigi Cavallo
- KAUST Catalysis Center; Physical Sciences and Engineering Division; King Abdullah University of Science and Technology; Thuwal 23955-6900 Saudi Arabia
| | - Steven P. Nolan
- Chemistry Department; College of Science; King Saud University; P.O. Box 2455 Riyadh 11451 Saudi Arabia
| | - Albert Poater
- Institut de Química Computacional i Catàlisi and Departament de Química; Universitat de Girona; Campus Montilivi 17071 Girona, Catalonia Spain
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