1
|
Oliveira IS, Garcia MSA, Cassani NM, Oliveira ALC, Freitas LCF, Bertolini VKS, Castro J, Clauss G, Honorato J, Gadelha FR, Miguel DC, Jardim ACG, Abbehausen C. Exploring antiviral and antiparasitic activity of gold N-heterocyclic carbenes with thiolate ligands. Dalton Trans 2024. [PMID: 39171417 DOI: 10.1039/d4dt01879f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
Gold(I) N-heterocyclic carbenes have been explored for their therapeutic potential against several diseases. Neglected tropical diseases, including leishmaniasis, Chagas disease, and viral infections, such as zika, mayaro, and chikungunya, urgently require new treatment options. The emergent SARS-CoV-2 also demands significant attention. Gold complexes have shown promise as alternative treatments for these conditions. Previously, gold(I)(1,3-bis(mesityl)imidazole-2-ylidene)Cl (AuIMesCl) demonstrated significant leishmanicidal and anti-Chikungunya virus activities. In this study, we synthesized and fully characterized a series of gold(I)(1,3-bis(mesityl)imidazole-2-ylidene)(SR) complexes, where SR includes thiolate donor species such as 1,3-thiazolidine-2-thione, 1,3-benzothiazole-2-thione, 2-mercaptopyrimidine, and 2-thiouracil. These compounds were stable in solution, and ligand exchange reactions with N-acetyl-L-cysteine indicated that complexes with SR ligands are more labile than those with chloride. Although the reactions are rapid, they reach equilibrium at varying molar ratios depending on the SR ligand. The increased lability of these compounds results in higher cytotoxicity to host cells, such as Vero E6 and bone marrow-differentiated macrophages, compared to AuIMesCl. Despite this, the compounds effectively inhibited viral replication, achieving 95.5% inhibition of Zika virus replication at 2 μM with 96% host cell viability. Although active at low concentrations (∼2 μM) against Leishmania (L.) amazonensis and Trypanosoma cruzi, their high cytotoxicity for macrophages confirmed AuIMesCl as a better candidate with a higher selectivity index. This work correlates the coordination chemistry of pyrimidines and thiazolidines with their in vitro biological activities against significant diseases.
Collapse
Affiliation(s)
- Igor S Oliveira
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, Brazil.
| | - Marcus S A Garcia
- Institute of Biology, University of Campinas, Campinas, São Paulo, Brazil
| | - Natasha M Cassani
- Laboratory of Antiviral Research (LAPAV), Institute of Biomedical Sciences, Federal University of Uberlândia, Brazil
| | - Ana L C Oliveira
- Laboratory of Antiviral Research (LAPAV), Institute of Biomedical Sciences, Federal University of Uberlândia, Brazil
| | - Lara C F Freitas
- Laboratory of Antiviral Research (LAPAV), Institute of Biomedical Sciences, Federal University of Uberlândia, Brazil
| | | | - Jennyfer Castro
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, Brazil.
| | - Gustavo Clauss
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, Brazil.
| | - João Honorato
- Institute of Chemistry, University of São Paulo, Brazil
| | - Fernanda R Gadelha
- Institute of Biology, University of Campinas, Campinas, São Paulo, Brazil
| | - Danilo C Miguel
- Institute of Biology, University of Campinas, Campinas, São Paulo, Brazil
| | - Ana C G Jardim
- Laboratory of Antiviral Research (LAPAV), Institute of Biomedical Sciences, Federal University of Uberlândia, Brazil
| | - Camilla Abbehausen
- Institute of Chemistry, University of Campinas, Campinas, São Paulo, Brazil.
| |
Collapse
|
2
|
Landrini M, Patel R, Tyrrell-Thrower J, Macchioni A, Hughes DL, Tensi L, Hrobárik P, Rocchigiani L. Exploring Ligand Effects on Structure, Bonding, and Photolytic Hydride Transfer of Cationic Gold(I) Bridging Hydride Complexes of Molybdocene and Tungstenocene. Inorg Chem 2024; 63:13525-13545. [PMID: 38989543 DOI: 10.1021/acs.inorgchem.4c01655] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/12/2024]
Abstract
A diverse family of heterobimetallic bridging hydride adducts of the type [LAu(μ-H)2MCp2][X] (L = 1,3-bis(2,6-diisopropylphenyl)imidazole-2-ylidene, IPr; 1,3-bis(1-adamantyl)imidazole-2-ylidene, IAd; 1,3-bis(2,6-di-iso-propylphenyl)-5,5-dimethyl-4,6-diketopyrimidinyl-2-ylidene, DippDAC; triphenylphosphine, PPh3; 2-di-tert-butylphosphino-2',4',6'-triisopropylbiphenyl, tBuXPhos; X = SbF6-, BF4- or TfO-) was synthesized by reacting group VI metallocene dihydrides Cp2MH2 (Cp = cyclopentadienyl anion; M = Mo, W) with cationic gold(I) complexes [LAu(NCMe)][X]. Trimetallic [L'Au2(μ-H)2WCp2][X]2 and tetrametallic [L'Au2{(μ-H)2WCp2}2] [X]2 complexes (L' = rac-2,2'-bis(diphenylphosphino)-1,1'-binaphthalene or bis(diphenylphosphinomethane)) were obtained by reacting digold [L'{Au(NCMe)}2][X]2 with Cp2WH2 in a 1:1 and a 1:2 stoichiometry. Accessing such a broad structural diversity allowed us to pinpoint roles played by the ancillary ligands and group VI metals on the bonding properties of this family of bridging hydrides. In particular, a clear effect of the ligand on the interaction energy and electronic structure was observed, with important implications on photolytic reactivity. UV or visible light irradiation, indeed, leads to the selective cleavage of the heterobimetallic Au(μ-H)2M arrangement and formation of molecular gold hydrides. The photolysis was found to be chromoselective (wavelength-dependent), which can be ascribed to different charge redistributions upon excitation to the first (Kasha's reactivity) and higher (anti-Kasha's reactivity) excited states.
Collapse
Affiliation(s)
- Martina Landrini
- Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Rohan Patel
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| | - Joshua Tyrrell-Thrower
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| | - Alceo Macchioni
- Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - David L Hughes
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| | - Leonardo Tensi
- Department of Pharmaceutical Sciences, University of Perugia, Via del Liceo 1, 06123 Perugia, Italy
| | - Peter Hrobárik
- Department of Inorganic Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, SK-84215 Bratislava, Slovakia
| | - Luca Rocchigiani
- Department of Chemistry, Biology and Biotechnology, University of Perugia and CIRCC, Via Elce di Sotto 8, 06123 Perugia, Italy
- School of Chemistry, University of East Anglia, Norwich Research Park, NR4 7TJ Norwich, U.K
| |
Collapse
|
3
|
Sorroche A, Reboiro F, Monge M, López-de-Luzuriaga JM. Recent Trends in Group 11 Hydrogen Bonding. Chempluschem 2024:e202400273. [PMID: 38764413 DOI: 10.1002/cplu.202400273] [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: 04/16/2024] [Revised: 05/13/2024] [Accepted: 05/13/2024] [Indexed: 05/21/2024]
Abstract
Conventional hydrogen bonding (H-bonding) has been extensively studied in organic and biological systems. However, its role in transition metal chemistry, particularly with Group 11 metals (i. e. Cu, Ag, Au) as hydrogen bond acceptors, remains relatively unexplored. Through a combination of experimental techniques, such as Nuclear Magnetic Resonance (NMR), Infrared spectroscopy (IR), X-Ray Diffraction (XRD), and computational calculations, several aspects of H-bonding interactions with Group 11 metals are examined, shedding light on its impact on structural motifs and reactivity. These include bond strengths, geometries, and effects on electronic structures. Understanding the intricacies of hydrogen bonding within transition metal chemistry holds promise for various applications, including catalytic transformations, the construction of molecular assemblies, synthesis of complexes displaying anticancer activities, or luminescence applications (e. g. Thermally Activated Delayed Fluorescence, TADF). This review encompasses the most significant recent advances, challenges, and future prospects in this emerging field.
Collapse
Affiliation(s)
- Alba Sorroche
- Departamento de Química, Instituto de Investigación en Química (IQUR), Universidad de La Rioja, Complejo Científico-Tecnológico, 26006, Logroño, Spain
| | - Félix Reboiro
- Departamento de Química, Instituto de Investigación en Química (IQUR), Universidad de La Rioja, Complejo Científico-Tecnológico, 26006, Logroño, Spain
| | - Miguel Monge
- Departamento de Química, Instituto de Investigación en Química (IQUR), Universidad de La Rioja, Complejo Científico-Tecnológico, 26006, Logroño, Spain
| | - José María López-de-Luzuriaga
- Departamento de Química, Instituto de Investigación en Química (IQUR), Universidad de La Rioja, Complejo Científico-Tecnológico, 26006, Logroño, Spain
| |
Collapse
|
4
|
Watson BT, Dias HVR. Going for gold - the chemistry of structurally authenticated gold(I)-ethylene complexes. Chem Commun (Camb) 2024; 60:4872-4889. [PMID: 38567496 DOI: 10.1039/d4cc00676c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Gold coordination chemistry and catalysis involving unsaturated hydrocarbons such as olefins have experienced a remarkable growth during the last few decades. Despite the importance, isolable and well-characterized molecules with ethylene, the simplest and the most widely produced olefin, on gold are still limited. This review aims to cover features of, and strategies utilized to stabilize, gold-ethylene complexes and their diverse use in chemical transformations and homogeneous catalytic processes. Isolable and well-authenticated gold-ethylene complexes are important not only for structural, spectroscopic, and bonding studies but also as models for likely intermediates in gold mediated reactions of alkenes and gold-alkene species observed in the gas phase. There has also been development on AuI/III catalytic cycles. Nitrogen based ligands have been the most widely utilized ligand supports thus far for the successful stabilization of gold-ethylene adducts. Gold has a bright future in olefin chemistry and with ethylene.
Collapse
Affiliation(s)
- Brandon T Watson
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| |
Collapse
|
5
|
Mariconda A, Iacopetta D, Sirignano M, Ceramella J, D'Amato A, Marra M, Pellegrino M, Sinicropi MS, Aquaro S, Longo P. Silver and Gold Complexes with NHC-Ligands Derived from Caffeine: Catalytic and Pharmacological Activity. Int J Mol Sci 2024; 25:2599. [PMID: 38473851 DOI: 10.3390/ijms25052599] [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: 02/06/2024] [Revised: 02/19/2024] [Accepted: 02/21/2024] [Indexed: 03/14/2024] Open
Abstract
N-heterocyclic carbene (NHC) silver(I) and gold(I) complexes have found different applications in various research fields, as in medicinal chemistry for their antiproliferative, anticancer, and antibacterial activity, and in chemistry as innovative and effective catalysts. The possibility of modulating the physicochemical properties, by acting on their ligands and substituents, makes them versatile tools for the development of novel metal-based compounds, mostly as anticancer compounds. As it is known, chemotherapy is commonly adopted for the clinical treatment of different cancers, even though its efficacy is hampered by several factors. Thus, the development of more effective and less toxic drugs is still an urgent need. Herein, we reported the synthesis and characterization of new silver(I) and gold(I) complexes stabilized by caffeine-derived NHC ligands, together with their biological and catalytic activities. Our data highlight the interesting properties of this series as effective catalysts in A3-coupling and hydroamination reactions and as promising anticancer, anti-inflammatory, and antioxidant agents. The ability of these complexes in regulating different pathological aspects, and often co-promoting causes, of cancer makes them ideal leads to be further structurally functionalized and investigated.
Collapse
Affiliation(s)
- Annaluisa Mariconda
- Department of Science, University of Basilicata, Via dell'Ateneo Lucano 10, 85100 Potenza, Italy
| | - Domenico Iacopetta
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende, Italy
| | - Marco Sirignano
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Jessica Ceramella
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende, Italy
| | - Assunta D'Amato
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| | - Maria Marra
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende, Italy
| | - Michele Pellegrino
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende, Italy
| | - Maria Stefania Sinicropi
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende, Italy
| | - Stefano Aquaro
- Department of Pharmacy, Health and Nutritional Sciences, University of Calabria, Via Pietro Bucci, 87036 Arcavacata di Rende, Italy
| | - Pasquale Longo
- Department of Chemistry and Biology "A. Zambelli", University of Salerno, Via Giovanni Paolo II 132, 84084 Fisciano, Italy
| |
Collapse
|
6
|
Sirignano M, D’Amato A, Costabile C, Mariconda A, Crispini A, Scarpelli F, Longo P. Hydroamination of alkynes catalyzed by NHC-Gold(I) complexes: the non-monotonic effect of substituted arylamines on the catalyst activity. Front Chem 2023; 11:1260726. [PMID: 38124702 PMCID: PMC10731675 DOI: 10.3389/fchem.2023.1260726] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Accepted: 10/24/2023] [Indexed: 12/23/2023] Open
Abstract
Imines are valuable key compounds for synthesizing several nitrogen-containing molecules used in biological and industrial fields. They have been obtained, as highly regioselective Markovnikov products, by reacting several alkynes with arylamines in the presence of three new N-Heterocyclic carbene gold(I) complexes (3b, 4b, and 6b) together with the known 1-2b and 7b gold complexes as well as silver complexes 1-2a. Gold(I) complexes were investigated by means of NMR, mass spectroscopy, elemental analysis, and X-ray crystallographic studies. Accurate screening of co-catalysts and solvents led to identifying the best reaction conditions and the most active catalyst (2b) in the model hydroamination of phenylacetylene with aniline. Complex 2b was then tested in the hydroamination of alkynes with a wide variety of arylamines yielding a lower percentage of product when arylamines with both electron-withdrawing and electron-donating substituents were involved. Computational studies on the rate-determining step of hydroamination were conducted to shed light on the significantly different yields observed when reacting arylamines with different substituents.
Collapse
Affiliation(s)
- Marco Sirignano
- Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Fisciano, Italy
| | - Assunta D’Amato
- Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Fisciano, Italy
| | - Chiara Costabile
- Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Fisciano, Italy
| | | | - Alessandra Crispini
- Department of Chemistry and Chemical Technologies, University of Calabria, Arcavacata Di Rende, Italy
| | - Francesca Scarpelli
- Department of Chemistry and Chemical Technologies, University of Calabria, Arcavacata Di Rende, Italy
| | - Pasquale Longo
- Department of Chemistry and Biology “A. Zambelli”, University of Salerno, Fisciano, Italy
| |
Collapse
|
7
|
Röther A, Farmer JC, Portwich FL, Görls H, Kretschmer R. Anion-Dependent Reactivity of Mono- and Dinuclear Boron Cations. Chemistry 2023; 29:e202302544. [PMID: 37641815 DOI: 10.1002/chem.202302544] [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: 08/04/2023] [Revised: 08/28/2023] [Accepted: 08/28/2023] [Indexed: 08/31/2023]
Abstract
The dinuclear bis(N-heterocyclic carbene) borane adduct 2 rapidly reacts with tritylium salts at room temperature but the outcome is strongly impacted by the respective counter-ion. Using tritylium tetrakis(perfluoro-tert-butoxy)aluminate affords - depending on the solvent - either the bis(boronium) ion 4 or the hydride-bridged dication 5. In case of tritylium hexafluorophosphate, however, H/F exchange occurs between boron and phosphorus yielding the dinuclear BF3 adduct 3 along with phosphorus dihydride trifluoride. H/F exchange also takes place when using the mononuclear N-heterocyclic carbene BH3 adduct 6 and hence provides a facile route to PH2 F3 , which is usually synthesized in more complex reaction sequences regularly involving toxic hydrogen fluoride. DFT calculations shed light on the H/F exchange between the borenium ion and the [PF6 ]- counter-ion and the computed mechanism features only small barriers in line with the experimental observations.
Collapse
Affiliation(s)
- Alexander Röther
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - James C Farmer
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Flavio L Portwich
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Helmar Görls
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
| | - Robert Kretschmer
- Institute of Inorganic and Analytical Chemistry (IAAC), Friedrich Schiller University Jena, Humboldtstraße 8, 07743, Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743, Jena, Germany
- Institute of Chemistry, Chemnitz University of Technology, Straße der Nationen 62, 09111, Chemnitz, Germany
| |
Collapse
|
8
|
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.
Collapse
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
| |
Collapse
|
9
|
Greif CE, Mertens RT, Berger G, Parkin S, Awuah SG. An anti-glioblastoma gold(i)-NHC complex distorts mitochondrial morphology and bioenergetics to induce tumor growth inhibition. RSC Chem Biol 2023; 4:592-599. [PMID: 37547458 PMCID: PMC10398352 DOI: 10.1039/d3cb00051f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2023] [Accepted: 05/19/2023] [Indexed: 08/08/2023] Open
Abstract
Glioblastoma multiforme (GBM) is the most lethal brain cancer subtype, often advanced by the time of initial diagnosis. Existing treatment modalities including surgery, chemotherapy and radiation have been stymied by recurrence, metastasis, drug resistance and brain targetability. Here, we report a geometrically distinct Au(i) complex ligated by N^N-bidentate ligands and supported by a N-heterocyclic ligand that modulates mitochondrial morphology to inhibit GBM in vitro and in vivo. This work benefits from the facile preparation of anti-GBM Au(i)-NHC complexes.
Collapse
Affiliation(s)
- Charles E Greif
- Department of Chemistry, University of Kentucky Lexington Kentucky 40506 USA
| | - R Tyler Mertens
- Department of Chemistry, University of Kentucky Lexington Kentucky 40506 USA
| | - Gilles Berger
- Harvey Cushing Neuro-Oncology Laboratories, Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School Boston MA 02115 USA
- Microbiology, Bioorganic & Macromolecular Chemistry, Faculté de Pharmacie, Université libre de Bruxelles (ULB), Boulevard du Triomphe 1050 Brussels Belgium
| | - Sean Parkin
- Department of Chemistry, University of Kentucky Lexington Kentucky 40506 USA
| | - Samuel G Awuah
- Department of Chemistry, University of Kentucky Lexington Kentucky 40506 USA
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky Lexington Kentucky 40536 USA
- University of Kentucky Markey Cancer Center, University of Kentucky Lexington KY 40536 USA
| |
Collapse
|
10
|
Kosuge S, Araki Y, Tsuge K, Sugimoto K, Matsuya Y. One-Pot Synthesis of Pentasubstituted Pyridines following the Gold(I)-Catalyzed Aza-Enyne Metathesis/6π-Electrocyclization-Aromatization Sequence. J Org Chem 2023. [PMID: 37191633 DOI: 10.1021/acs.joc.3c00270] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
The one-pot de novo synthesis of pentasubstituted pyridines was realized following the process of Au(I)-autotandem catalysis and subsequent aromatization. The process involves aza-enyne metathesis with aryl propiolates to yield 1-azabutadienes and their addition/6π-electrocyclization sequence with the other propiolate units. The resultant 1,4-dihydropyridines were aromatized to furnish the pyridines in the presence of atmospheric oxygen. The aryl propiolates were regioselectively incorporated into the ring system to afford 2-arylpyridines as the sole product.
Collapse
Affiliation(s)
- Shuto Kosuge
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Yusuke Araki
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Kiyoshi Tsuge
- Faculty of Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Kenji Sugimoto
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| | - Yuji Matsuya
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan
| |
Collapse
|
11
|
Nature of the Dative Nitrogen-Coinage Metal Bond in Molecular Motors. Evaluation of NHC-M Pyrazine Bond (M=Cu, Ag, Au) from Relativistic DFT. Inorganica Chim Acta 2023. [DOI: 10.1016/j.ica.2023.121401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
12
|
Lee SY, Shetye GS, Son SR, Lee H, Klein LL, Yoshihara JK, Ma R, Franzblau SG, Cho S, Jang DS. Anti-Microbial Activity of Aliphatic Alcohols from Chinese Black Cardamom (Amomum tsao-ko) against Mycobacterium tuberculosis H37Rv. PLANTS (BASEL, SWITZERLAND) 2022; 12:34. [PMID: 36616162 PMCID: PMC9823811 DOI: 10.3390/plants12010034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 12/15/2022] [Accepted: 12/19/2022] [Indexed: 06/17/2023]
Abstract
The fruits of Amomun tsao-ko (Chinese black cardamom; Zingiberaceae) contain an abundance of essential oils, which have previously demonstrated significant antimicrobial activity. In our preliminary search for natural anti-tuberculosis agents, an acetone extract of A. tsao-ko (AAE) exhibited strong antibacterial activity against Mycobacterium tuberculosis H37Rv. Therefore, the aim of this study was to find the principal compounds in an AAE against M. tuberculosis. Nine aliphatic compounds (1−9) including a new compound (1, tsaokol B) and a new natural unsaturated aliphatic diester (6), together with three acyclic terpenoids (10−12), were isolated from an AAE by repetitive chromatography. The structures of the isolates were determined by spectroscopic data analysis. All isolates were evaluated for activity against M. tuberculosis H37Rv. Isolated compounds 1−6, and 11 had MICs ranging from 0.6−89 µg/mL. In contrast, compounds 7 to 10, and 12 had MICs that were >100 µg/mL. Tsaokol A (3) was the most active compound with MICs of 0.6 µg/mL and 1.4 µg/mL, respectively, against replicating and nonreplicating M. tuberculosis. These results are the first to illustrate the potency of tsaokol A (3) as a natural drug candidate with good selectivity for treating tuberculosis.
Collapse
Affiliation(s)
- So Young Lee
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Gauri S. Shetye
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - So-Ri Son
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
| | - Hyun Lee
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
- Biophysics Core at Research Resource Center, University of Illinois at Chicago, 1100 S. Ashland Ave, Chicago, IL 60607, USA
| | - Larry L. Klein
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Jeffrey K. Yoshihara
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Rui Ma
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Scott G. Franzblau
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Sanghyun Cho
- Institute for Tuberculosis Research, Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, USA
| | - Dae Sik Jang
- Department of Biomedical and Pharmaceutical Sciences, Graduate School, Kyung Hee University, Seoul 02447, Republic of Korea
- Department of Pharmaceutical Science, College of Pharmacy, Kyung Hee University, Seoul 02447, Republic of Korea
| |
Collapse
|
13
|
Nugegoda D, Tzouras NV, Nolan SP, Delcamp JH. N-Heterocyclic Carbene Gold Complexes in a Photocatalytic CO 2 Reduction Reaction. Inorg Chem 2022; 61:18802-18809. [DOI: 10.1021/acs.inorgchem.2c03487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dinesh Nugegoda
- Department of Chemistry and Biochemistry, University of Mississippi, 322 Coulter Hall, University Park 38677, Mississippi, United States
| | - Nikolaos V. Tzouras
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, Ghent 9000 S-3, Belgium
| | - Steven P. Nolan
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, Ghent 9000 S-3, Belgium
| | - Jared H. Delcamp
- Department of Chemistry and Biochemistry, University of Mississippi, 322 Coulter Hall, University Park 38677, Mississippi, United States
| |
Collapse
|
14
|
Navarro M, Alférez MG, de Sousa M, Miranda-Pizarro J, Campos J. Dicoordinate Au(I)-Ethylene Complexes as Hydroamination Catalysts. ACS Catal 2022; 12:4227-4241. [PMID: 35391904 PMCID: PMC8981211 DOI: 10.1021/acscatal.1c05823] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 03/12/2022] [Indexed: 01/22/2023]
Abstract
A series of gold(I)-ethylene π-complexes containing a family of bulky phosphine ligands has been prepared. The use of these sterically congested ligands is crucial to stabilize the gold(I)-ethylene bond and prevent decomposition, boosting up their catalytic performance in the highly underexplored hydroamination of ethylene. The precatalysts bearing the most sterically demanding phosphines showed the best results reaching full conversion to the hydroaminated products under notably mild conditions (1 bar of ethylene pressure at 60 °C). Kinetic analysis together with density functional theory calculations revealed that the assistance of a second molecule of the nucleophile as a proton shuttle is preferred even when using an extremely congested cavity-shaped Au(I) complex. In addition, we have measured a strong primary kinetic isotopic effect that is consistent with the involvement of X-H bond-breaking events in the protodeauration turnover-limiting step.
Collapse
Affiliation(s)
- Miquel Navarro
- Departamento
de Química Inorgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), Instituto de Investigaciones Químicas (IIQ), Consejo Superior
de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| | - Macarena G. Alférez
- Departamento
de Química Inorgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), Instituto de Investigaciones Químicas (IIQ), Consejo Superior
de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| | - Morgane de Sousa
- Departamento
de Química Inorgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), Instituto de Investigaciones Químicas (IIQ), Consejo Superior
de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| | - Juan Miranda-Pizarro
- Departamento
de Química Inorgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), Instituto de Investigaciones Químicas (IIQ), Consejo Superior
de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| | - Jesús Campos
- Departamento
de Química Inorgánica and Centro de Innovación
en Química Avanzada (ORFEO-CINQA), Instituto de Investigaciones Químicas (IIQ), Consejo Superior
de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain
| |
Collapse
|
15
|
Galassi R, Luciani L, Graiff C, Manca G. A Reinterpretation of the Imidazolate Au(I) Cyclic Trinuclear Compounds Reactivity with Iodine and Methyl Iodide with the Perspective of the Inverted Ligand Field Theory. Inorg Chem 2022; 61:3527-3539. [PMID: 35166538 PMCID: PMC8889582 DOI: 10.1021/acs.inorgchem.1c03492] [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] [Indexed: 11/29/2022]
Abstract
![]()
Coinage metal cyclic trinuclear compounds
(CTCs) are an emerging
class of metal coordination compounds that are valuable for many fine
optoelectronic applications, even though the reactivity dependence
by the different bridging ligands remains somewhat unclear. In this
work, to furnish some hints to unravel the effect of substituents
on the chemistry of Au(I) CTCs made of a specific class of bridging
ligand, we have considered two imidazolate Au(I) CTCs and the effect
of different substituents on the pyrrolic N atoms relative to classic
metal oxidations with I2 or by probing electrophilic additions.
Experimental suggestions depict a thin borderline between the addition
of MeI to the N-methyl or N-benzyl imidazolyl CTCs, which afford the
oxidized CTC in the former and the ring opening of the CTC and the
formation of carbene species in the latter. Moreover, the reactions
with iodine yield to the oxidation of the metal centers for the former
and just of a metal center in the latter, even in molar excess of
iodine. The analysis of the bond distances in the X-ray crystal structures
of the oxidized highlights that Au(III)-C and Au(III)-N bonds are
longer than observed for Au(I)–C and Au(I)–N bonds,
as formally not expected for Au(III) centers. Computational studies
converge on the attribution of these discrepancies to an additional
case of inverted ligand field (ILF), which solves the question with
a new interpretation of the Au(I)–ligand bonding in the oxidized
CTCs, which furnishes a new interpretation of the Au(I)-ligand bonding
in the oxidized CTCs, opening a discussion about addition/oxidation
reactions. Finally, the theoretical studies outputs depict energy
profiles that are compatible with the experimental results obtained
in the reaction of the two CTCs toward the addition of I2, MeI, and HCl. A revisitation
of some classic oxidation reactions of gold
centers in cyclic trinuclear compounds (CTCs) provides experimental
results leading to the opportunity to delineate the effect of imidazole
substituents in different outcomes from the reactions of CTCs with
I2 or MeI. Moreover, with the match between experimental
and theoretical results, a new interpretation of the oxidation states
of tetracoordinate gold as cases of inverted ligand field (ILF) is
discussed.
Collapse
Affiliation(s)
- Rossana Galassi
- School of Science and Technology, Chemistry Division, University of Camerino, Via Sant'Agostino, 1, I-62032, Camerino, Italy
| | - Lorenzo Luciani
- School of Science and Technology, Chemistry Division, University of Camerino, Via Sant'Agostino, 1, I-62032, Camerino, Italy
| | - Claudia Graiff
- Department of Chemistry, Life Sciences and Environmental Sustainability, Università degli Studi di Parma, Parco Area delle Scienze 17/A, 43124 Parma, Italy
| | - Gabriele Manca
- Istituto di Chimica dei Composti Organo-Metallici, CNR-ICCOM, 50019, Sesto Fiorentino, Italy
| |
Collapse
|
16
|
Tran H, Revol G, Poyser A, Barriault L. Divergent and Modular Synthesis of Terpenoid Scaffolds via a Au
I
Catalyzed One‐Pot Cascade. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202110575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Huy Tran
- Department of Chemistry and Biomolecular Sciences Centre for Catalysis, Research and Innovation University of Ottawa 10 Marie Curie Ottawa Ontario K1N6N5 Canada
| | - Guillaume Revol
- OmegaChem 480 Rue Perreault Saint-Romuald Quebec G6W7V6 Canada
| | - Alyson Poyser
- Transport Canada 330 Sparks St. Ottawa ON K1A0N8 Canada
| | - Louis Barriault
- Department of Chemistry and Biomolecular Sciences Centre for Catalysis, Research and Innovation University of Ottawa 10 Marie Curie Ottawa Ontario K1N6N5 Canada
| |
Collapse
|
17
|
Merschel A, Vishnevskiy YV, Neumann B, Stammler G, Ghadwal RS. Crystalline phosphino-functionalized mesoionic olefins (p-MIOs). Dalton Trans 2022; 51:8217-8222. [DOI: 10.1039/d2dt01314b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Phosphino-functionalized mesoionic olefins (p-MIOs), (iMIC)CHR (iMIC = PhC{N(Dipp)}2C(PPh2)C, Dipp = 2,6-iPr2C6H3; R = H 4a or Ph 4b) derived from a 1,3-imidazole based mesoionic carbene (iMIC) are reported. The p-MIOs...
Collapse
|
18
|
Rachor SG, Müller R, Wittwer P, Kaupp M, Braun T. Synthesis, Reactivity, and Bonding of Gold(I) Fluorido-Phosphine Complexes. Inorg Chem 2021; 61:357-367. [PMID: 34913690 DOI: 10.1021/acs.inorgchem.1c02959] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Gold(I) fluorido complexes with phosphine ligands have been synthesized from their respective iodido precursors. The bonding situation in comparison between complexes bearing phosphines and N-heterocyclic carbenes (NHCs) was explored quantum-chemically, obtaining similar results for both. Calculations of the 19F NMR chemical shifts match the experimental values well, including the approximately 40 ppm low-field shifts for the phosphine complexes compared to the NHC complexes, in spite of similar negative charges on fluorine. The reactivity of the highly water-sensitive gold(I) fluorido complexes was studied, resulting in substitution at the metal using trimethylsilyl reagents. The compounds studied were characterized using NMR as well as X-ray diffraction methods.
Collapse
Affiliation(s)
- Simon G Rachor
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Robert Müller
- Institut für Chemie, Theoretische Chemie/Quantenchemie, Technische Universität Berlin, Sekr. C7, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Philipp Wittwer
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Martin Kaupp
- Institut für Chemie, Theoretische Chemie/Quantenchemie, Technische Universität Berlin, Sekr. C7, Strasse des 17 Juni 135, 10623 Berlin, Germany
| | - Thomas Braun
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| |
Collapse
|
19
|
Xu S, Yang D, Zhao J, Wang B, Qu J. Formation of thiolate-bridged diiron complexes featuring anionic isocyanide originating from the activation of counterions in the outer sphere. Dalton Trans 2021; 50:18027-18035. [PMID: 34825913 DOI: 10.1039/d1dt03482k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal isocyanide complexes have attracted increasing attention owing to their versatile applications in catalytic organic transformations. Compared with metal complexes with neutral isocyanide ligands, those featuring anionic isocyanide groups are relatively rare and poorly understood. So far, there has been no report on structurally characterized metal anionic isocyanopentafluorophosphate complexes that may have potential for the development of some unique polymerization reactions. In this paper, we adopt a dicationic thiolate-bridged diiron complex as the reaction platform for the coordination activation and functionalization of cyanide. When treating with KCN, a facile salt metathesis with hexafluorophosphate anions occurred to generate monocyanide or dicyanide species. However, using trimethylsilyl cyanide as the substrate, an unsymmetrical diiron complex bearing a terminal [CNSiMe3] ligand and an anionic [NCPF5]- group derived from the activation of one non-coordinating anion PF6- was obtained in a high yield. Interestingly, due to the lability of the N-Si bond in the [CNSiMe3] ligand, it can play the role of an active site for the interaction with counter anions in the outer sphere. On one hand, this labile ligand can facilitate the activation of the P-F bond in PF6- and the C-B bond in BPh4- to afford structurally characterized thiolate-bridged diiron anionic isocyanopentafluorophosphate and isocyanotriphenylborate complexes, respectively. On the other hand, it can also interact with Lut·HCl to convert into a cyanide ligand stabilized by a hydrogen bonding interaction. This work represents a new synthetic pathway to furnish metal anionic isocyanide complexes.
Collapse
Affiliation(s)
- Sunlin Xu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.
| | - Dawei Yang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.
| | - Jinfeng Zhao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.
| | - Baomin Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.
| | - Jingping Qu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, P.R. China.
| |
Collapse
|
20
|
Sato CM, Walde RK, Bacsa J, Jordan AJ, Sadighi JP. Ligand-based control of nuclearity in (NHC)gold(I) sulfides. Dalton Trans 2021; 50:15721-15729. [PMID: 34697620 DOI: 10.1039/d1dt02616j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
N-Heterocyclic carbene (NHC) ligands support gold(I) sulfide complexes of varying nuclearity and charge. For sterically undemanding ligands, gold(I) chlorides react with sulfide to form trigold μ3-sulfido cations as the first observed products. The ligand IMes [1,3-bis(2,4,6-trimethylphenyl)imidazol-2-ylidene] supports a monomeric cation, whereas the ICy-(1,3-dicyclohexylimidazol-2-ylidene-) supported cation crystallises as a dimer linked through an aurophilic interaction. The more sterically demanding IDipp [1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene] supports a terminal hydrosulfide, a (μ-hydrosulfido)digold cation, and a μ3-sulfido cation. Use of the expanded-ring NHC 7Dipp [1,3-bis(2,6-diisopropylphenyl)-4,5,6,7-tetrahydro-1,3-diazepin-2-ylidene] allows the isolation of a neutral digold sulfide.
Collapse
Affiliation(s)
- Christopher M Sato
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| | - Rebecca K Walde
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| | - John Bacsa
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332. .,X-ray Crystallography Center, Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, USA, 30322
| | - Abraham J Jordan
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| | - Joseph P Sadighi
- School of Chemistry & Biochemistry, Georgia Institute of Technology, 901 Atlantic Drive NW, Atlanta, GA, USA, 30332.
| |
Collapse
|
21
|
Tran H, Revol G, Poyser A, Barriault L. Divergent and Modular Synthesis of Terpenoid Scaffolds via a Au I Catalyzed One-Pot Cascade. Angew Chem Int Ed Engl 2021; 61:e202110575. [PMID: 34714952 DOI: 10.1002/anie.202110575] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 10/07/2021] [Indexed: 11/08/2022]
Abstract
A one-pot cascade sequence to generate synthetically challenging polycyclic scaffolds is reported utilizing a novel Lewis acid gold catalyst for the key cyclization step, enabling the divergent synthesis of both 6,6,5-tricyclic and 6,6,6,5-tetracyclic cores through both ligand and reaction condition control. We have combined the intrinsic complexity and stereoselectivity of cycloadditions with the electronic and steric properties of gold complexes to selectively generate complex polycyclic scaffolds in a single operation.
Collapse
Affiliation(s)
- Huy Tran
- Department of Chemistry and Biomolecular Sciences, Centre for Catalysis, Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N6N5, Canada
| | - Guillaume Revol
- OmegaChem, 480 Rue Perreault, Saint-Romuald, Quebec, G6W7V6, Canada
| | - Alyson Poyser
- Transport Canada, 330 Sparks St., Ottawa, ON, K1A0N8, Canada
| | - Louis Barriault
- Department of Chemistry and Biomolecular Sciences, Centre for Catalysis, Research and Innovation, University of Ottawa, 10 Marie Curie, Ottawa, Ontario, K1N6N5, Canada
| |
Collapse
|
22
|
Navarro M, Miranda-Pizarro J, Moreno JJ, Navarro-Gilabert C, Fernández I, Campos J. A dicoordinate gold(I)-ethylene complex. Chem Commun (Camb) 2021; 57:9280-9283. [PMID: 34519292 PMCID: PMC8438763 DOI: 10.1039/d1cc02769g] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The use of the exceptionally bulky tris-2-(4,4′-di-tert-butylbiphenylyl)phosphine ligand allows the isolation and complete characterization of the first dicoordinate gold(i)–ethylene adduct, filling a missing fundamental piece on the organometallic chemistry of gold. Besides, the bonding situation of this species has been investigated by means of state-of-the-art Density Functional Theory (DFT) calculations indicating that π-backdonation plays a minor role compared with tricoordinate analogues. The use of the exceptionally bulky tris-2-(4,4′-di-tert-butylbiphenylyl)phosphine ligand allows the isolation and complete characterization of the first dicoordinate gold(i)–ethylene adduct, filling a missing fundamental piece on the organometallic chemistry of gold.![]()
Collapse
Affiliation(s)
- Miquel Navarro
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain.
| | - Juan Miranda-Pizarro
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain.
| | - Juan J Moreno
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain.
| | - Carlos Navarro-Gilabert
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain.
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Madrid 28040, Spain.
| | - Jesús Campos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Consejo Superior de Investigaciones Científicas (CSIC) and University of Sevilla, Sevilla 41092, Spain.
| |
Collapse
|
23
|
Voloshkin VA, Tzouras NV, Nolan SP. Recent advances in the synthesis and derivatization of N-heterocyclic carbene metal complexes. Dalton Trans 2021; 50:12058-12068. [PMID: 34519733 DOI: 10.1039/d1dt01847g] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
N-heterocyclic carbene (NHC) metal complexes have gained an incredible amount of attention in the course of the last two decades and have become indispensable as an intricate part of a plethora of applications. The areas of their synthesis and derivatization are constantly evolving and bring new, more sustainable, cost-effective and simpler approaches to the design of existing and next generation catalysts and materials. This article provides an overview of the latest developments, focusing on those which have appeared during the last two years.
Collapse
Affiliation(s)
- Vladislav A Voloshkin
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000 Ghent, Belgium.
| | - Nikolaos V Tzouras
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000 Ghent, Belgium.
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, Ghent University, Krijgslaan 281 (S-3), 9000 Ghent, Belgium.
| |
Collapse
|
24
|
Synthesis and coordination chemistry of silver(I), gold(I) and gold(III) complexes with picoline-functionalized benzimidazolin-2-ylidene ligands. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2021. [DOI: 10.1515/znb-2021-0087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The reactions of N-alkyl-N′-picolyl-benzimidazolium bromides or N,N′-dipicolyl-benzimidazolium bromide with silver oxide yielded the silver dicarbene complexes of the type [Ag(NHC)2][AgBr2] 1–4 (NHC = picoline-functionalized benzimidazolin-2-ylidene). The silver complexes 1–4 have been used in carbene transfer reactions to yield the gold(I) complexes of the type [AuCl(NHC)] 5–8 in good yields. A halide exchange at the metal center of complexes 5–8 with lithium bromide yielded the gold bromide complexes 9–12. Finally, the oxidation of the gold(I) centers in complexes 9–12 with elemental bromine gave the gold(III) complexes of the type [AuBr3(NHC)] 13–16. Molecular structures of selected Au(I) and Au(III) complexes have been determined by X-ray diffraction studies.
Collapse
|
25
|
Sugimoto K, Kosuge S, Sugita T, Miura Y, Tsuge K, Matsuya Y. Au(I) Catalyzed Synthesis of Densely Substituted Pyrazolines and Dihydropyridines via Sequential Aza-Enyne Metathesis/6π-Electrocyclization. Org Lett 2021; 23:3981-3985. [PMID: 33979152 DOI: 10.1021/acs.orglett.1c01171] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
A gold(I) autotandem catalysis protocol is reported for the de novo synthesis of densely substituted pyrazolines and dihydropyridines from the corresponding imine derivatives in a highly regioselective fashion via a one-pot aza-enyne metathesis/6π-electrocyclization sequence. The substituents on the nitrogen atom of the imine perfectly control the reaction pathways from the pivotal 1-azabutadiene intermediate; thus, carbazates were converted into pyrazolines via 6π-electrocyclization of α,β-unsaturated hydrazones, while aryl imines provided dihydropyridines via 6π-electrocyclization of 3-azahexatrienes.
Collapse
Affiliation(s)
- Kenji Sugimoto
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan and
| | - Shuto Kosuge
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan and
| | - Takae Sugita
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan and
| | - Yuka Miura
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan and
| | - Kiyoshi Tsuge
- Faculty of Science, University of Toyama, 3190 Gofuku, Toyama 930-8555, Japan
| | - Yuji Matsuya
- Faculty of Pharmaceutical Sciences, University of Toyama, 2630 Sugitani, Toyama 930-0194, Japan and
| |
Collapse
|
26
|
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.
Collapse
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
| |
Collapse
|
27
|
Park Y, Lee JS, Ryu J. Gold(I)‐Catalyzed Intramolecular Dehydrative Amination of Sulfamate Esters Tethered to Allylic Alcohols: A Strategy for the Synthesis of Cyclic Sulfamidates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202001330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Yunjeong Park
- College of Pharmacy & Graduate School of Pharmaceutical Sciences Ewha Womans University 52 Ewhayeodae-gil, Seodaemun-gu Seoul 03760 Republic of Korea
| | - Ji Sun Lee
- College of Pharmacy & Graduate School of Pharmaceutical Sciences Ewha Womans University 52 Ewhayeodae-gil, Seodaemun-gu Seoul 03760 Republic of Korea
| | - Jae‐Sang Ryu
- College of Pharmacy & Graduate School of Pharmaceutical Sciences Ewha Womans University 52 Ewhayeodae-gil, Seodaemun-gu Seoul 03760 Republic of Korea
| |
Collapse
|
28
|
Muñoz-Castro A, Wang G, Ponduru TT, Dias HVR. Synthesis and characterization of N-heterocyclic carbene-MOEt 2 complexes (M = Cu, Ag, Au). Analysis of solvated auxiliary-ligand free [(NHC)M] + species. Phys Chem Chem Phys 2021; 23:1577-1583. [PMID: 33406199 DOI: 10.1039/d0cp05222a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report the synthesis, characterization and computational analysis of coinage metal-ether complexes supported by N-heterocyclic carbenes (NHC), SIPr and Et2CAAC. The related water adducts are also included. The [(NHC)M]+(M = Cu, Ag, Au) species show the noteworthy ability to bind Et2O and H2O. This interaction towards Et2O and H2O is partly ascribed to a σ-hole bonding with an almost linear disposition, taking advantage of the enhanced σ-hole potential evaluated for such [(NHC)M]+ species. This enhanced ability is larger than those found for non-covalent interactions involving main group species.
Collapse
Affiliation(s)
- Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingeniería, Universidad Autonoma de Chile, El Llano Subercaseaux 2801, Santiago, Chile.
| | - Guocang Wang
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - Tharun Teja Ponduru
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry, The University of Texas at Arlington, Arlington, Texas 76019, USA.
| |
Collapse
|
29
|
π-Alkene/alkyne and carbene complexes of gold(I) stabilized by chelating ligands. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2021. [DOI: 10.1016/bs.adomc.2021.02.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
30
|
Sharp-Bucknall L, Barwise L, Bennetts JD, Albayer M, Dutton JL. Reactivity Studies of Cationic Au(III) Difluorides Supported by N Ligands. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00429] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Lachlan Sharp-Bucknall
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia 3086
| | - Lachlan Barwise
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia 3086
| | - Jason D. Bennetts
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia 3086
| | - Mohammad Albayer
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia 3086
| | - Jason L. Dutton
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, Victoria, Australia 3086
| |
Collapse
|
31
|
Manar KK, Chakrabortty S, Porwal VK, Prakash D, Thakur SK, Choudhury AR, Singh S. Two‐Coordinate Cu(I) and Au(I) Complexes Supported by BICAAC and CAAC Ligands. ChemistrySelect 2020. [DOI: 10.1002/slct.202002295] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Krishna K. Manar
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| | - Soumyadeep Chakrabortty
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| | - Vishal Kumar Porwal
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| | - Darsana Prakash
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| | - Sandeep Kumar Thakur
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| | - Angshuman Roy Choudhury
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| | - Sanjay Singh
- Department of Chemical Sciences Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81 SAS Nagar, Mohali 140306 Punjab India
| |
Collapse
|
32
|
A. C. A. Bayrakdar T, Nahra F, Davis JV, Gamage MM, Captain B, Temprado M, Marazzi M, Saab M, Hecke KV, Ormerod D, Hoff CD, Nolan SP. Dinuclear Gold(I) Complexes Bearing Alkyl-Bridged Bis(N-heterocyclic carbene) Ligands as Catalysts for Carboxylative Cyclization of Propargylamine: Synthesis, Structure, and Kinetic and Mechanistic Comparison to the Mononuclear Complex [Au(IPr)Cl]. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00404] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Tahani A. C. A. Bayrakdar
- 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
- VITO (Flemish Institute for Technological Research), Separation and Conversion Technology, Boeretang 200, B-2400 Mol, Belgium
| | - Jack V. Davis
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Mohan M. Gamage
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Burjor Captain
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Manuel Temprado
- Departamento de Química Analítica, Química Física e Ingenieŕa Química; Instituto de Investigación Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Universidad de Alcalá, Campus Universitario, 28805 Alcalá de Henares, Madrid, Spain
| | - Marco Marazzi
- Departamento de Química Analítica, Química Física e Ingenieŕa Química; Instituto de Investigación Química "Andrés M. del Río" (IQAR), Universidad de Alcalá, Universidad de Alcalá, Campus Universitario, 28805 Alcalá de Henares, Madrid, Spain
| | - Marina Saab
- 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
| | - Dominic Ormerod
- VITO (Flemish Institute for Technological Research), Separation and Conversion Technology, Boeretang 200, B-2400 Mol, Belgium
| | - Carl D. Hoff
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Steven P. Nolan
- Department of Chemistry and Centre for Sustainable Chemistry, Ghent University, Krijgslaan 281, S-3, 9000 Ghent, Belgium
| |
Collapse
|
33
|
Daugherty NT, Robilotto TJ, Bacsa J, Gray TG, Sadighi JP. A trigold carbide cation stabilized as a labile pyridine adduct. Polyhedron 2020. [DOI: 10.1016/j.poly.2020.114464] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
34
|
Dash C, Wang G, Muñoz-Castro A, Ponduru TT, Zacharias AO, Yousufuddin M, Dias HVR. Organic Azide and Auxiliary-Ligand-Free Complexes of Coinage Metals Supported by N-Heterocyclic Carbenes. Inorg Chem 2020; 59:2188-2199. [PMID: 31851494 DOI: 10.1021/acs.inorgchem.9b02771] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Organic azide complexes of copper(I) and silver(I), [(SIPr)CuN(1-Ad)NN][SbF6], [(SIPr)CuN(2-Ad)NN][SbF6], [(SIPr)CuN(Cy)NN][SbF6], and [(SIPr)AgN(1-Ad)NN][SbF6] have been synthesized by using Ag[SbF6] and the corresponding organic azides with (SIPr)CuBr and (SIPr)AgCl (SIPr = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene). The copper and silver organic azide complexes were characterized by various spectroscopic techniques and X-ray crystallography. Group trends of isoleptic Cu(I), Ag(I), and Au(I) organic azide complexes are presented on the basis of experimental data and a detailed computational study. The νasym(N3) values of the metal-bound 1-AdNNN in [(SIPr)MN(1-Ad)NN]+ follow the order Ag < Cu < Au. DFT calculations show that gold(I) forms the strongest bond with 1-AdNNN in this series, while silver has the weakest interaction. Furthermore, auxiliary ligand free coinage metal N-heterocyclic carbene complexes, [(SIPr)M][SbF6], have been synthesized via metathesis reactions of (SIPr)MCl (M = Cu, Ag, Au) with Ag[SbF6]. X-ray crystal structures of dinuclear [(SIPr)Ag]2[SbF6]2 and [(SIPr)Au]2[SbF6]2 are also reported. They show close metallophilic contacts. [(SIPr)Au]2[SbF6]2 reacts with OEt2, SMe2, and CNtBu to afford [(SIPr)Au(OEt2)][SbF6], [(SIPr)Au(SMe2)][SbF6], and [(SIPr)Au(CNtBu)][SbF6] adducts, respectively.
Collapse
Affiliation(s)
- Chandrakanta Dash
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - Guocang Wang
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - Alvaro Muñoz-Castro
- Grupo de Química Inorgánica y Materiales Moleculares, Facultad de Ingenieria , Universidad Autonoma de Chile , El Llano Subercaseaux 2801 , Santiago , Chile
| | - Tharun T Ponduru
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - Adway O Zacharias
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - Muhammed Yousufuddin
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| | - H V Rasika Dias
- Department of Chemistry and Biochemistry , The University of Texas at Arlington , Arlington , Texas 76019 , United States
| |
Collapse
|
35
|
Budagumpi S, Keri RS, Achar G, Brinda KN. Coinage Metal Complexes of Chiral N‐Heterocyclic Carbene Ligands: Syntheses and Applications in Asymmetric Catalysis. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201900859] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Srinivasa Budagumpi
- Centre for Nano and Material SciencesJain University, Jain Global Campus Bangalore 562112, Karnataka India
| | - Rangappa S. Keri
- Centre for Nano and Material SciencesJain University, Jain Global Campus Bangalore 562112, Karnataka India
| | - Gautam Achar
- Centre for Nano and Material SciencesJain University, Jain Global Campus Bangalore 562112, Karnataka India
| | - K. N. Brinda
- Centre for Nano and Material SciencesJain University, Jain Global Campus Bangalore 562112, Karnataka India
| |
Collapse
|
36
|
|
37
|
A. C. A. Bayrakdar T, Scattolin T, Ma X, Nolan SP. Dinuclear gold(i) complexes: from bonding to applications. Chem Soc Rev 2020; 49:7044-7100. [DOI: 10.1039/d0cs00438c] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The last two decades have seen a veritable explosion in the use of gold(i) complexes bearing N-heterocyclic carbene (NHC) and phosphine (PR3) ligands.
Collapse
Affiliation(s)
| | - Thomas Scattolin
- Department of Chemistry and Center for Sustainable Chemistry
- Ghent University
- Ghent
- Belgium
| | - Xinyuan Ma
- Department of Chemistry and Center for Sustainable Chemistry
- Ghent University
- Ghent
- Belgium
| | - Steven P. Nolan
- Department of Chemistry and Center for Sustainable Chemistry
- Ghent University
- Ghent
- Belgium
| |
Collapse
|
38
|
Tavakkolifard S, Sekine K, Reichert L, Ebrahimi M, Museridz K, Michel E, Rominger F, Babaahmadi R, Ariafard A, Yates BF, Rudolph M, Hashmi ASK. Gold-Catalyzed Regiospecific Annulation of Unsymmetrically Substituted 1,5-Diynes for the Precise Synthesis of Bispentalenes. Chemistry 2019; 25:12180-12186. [PMID: 31310400 PMCID: PMC6851633 DOI: 10.1002/chem.201902381] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 07/06/2019] [Indexed: 12/16/2022]
Abstract
Precise control of the selectivity in organic synthesis is important to access the desired molecules. We demonstrate a regiospecific annulation of unsymmetrically substituted 1,2-di(arylethynyl)benzene derivatives for a geometry-controlled synthesis of linear bispentalenes, which is one of the promising structures for material science. A gold-catalyzed annulation of unsymmetrically substituted 1,2-di(arylethynyl)benzene could produce two isomeric pentalenes, but both electronic and steric effects on the aromatics at the terminal position of the alkyne prove to be crucial for the selectivity; especially a regiospecific annulation was achieved with sterically blocked substituents; namely, 2,4,6-trimetyl benzene or 2,4-dimethyl benzene. This approach enables the geometrically controlled synthesis of linear bispentalenes from 1,2,4,5-tetraethynylbenzene or 2,3,6,7-tetraethynylnaphthalene. Moreover, the annulation of a series of tetraynes with a different substitution pattern regioselectively provided the bispentalene scaffolds. A computational study revealed that this is the result of a kinetic control induced by the bulky NHC ligands.
Collapse
Affiliation(s)
- Sara Tavakkolifard
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Kohei Sekine
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lisa Reichert
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Mina Ebrahimi
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Ketevan Museridz
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Elena Michel
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Frank Rominger
- Organisch-Chemisches InstitutHeidelberg UniversityIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Rasool Babaahmadi
- School of Physical Sciences (Chemistry)University of TasmaniaPrivate Bag 75HobartTAS7001Australia
| | - Alireza Ariafard
- School of Physical Sciences (Chemistry)University of TasmaniaPrivate Bag 75HobartTAS7001Australia
| | - Brian F. Yates
- School of Physical Sciences (Chemistry)University of TasmaniaPrivate Bag 75HobartTAS7001Australia
| | - Matthias Rudolph
- 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
| |
Collapse
|
39
|
Gasperini D, Greenhalgh MD, Imad R, Siddiqui S, Malik A, Arshad F, Choudhary MI, Al-Majid AM, Cordes DB, Slawin AMZ, Nolan SP, Smith AD. Chiral Au I - and Au III -Isothiourea Complexes: Synthesis, Characterization and Application. Chemistry 2019; 25:1064-1075. [PMID: 30357947 DOI: 10.1002/chem.201804653] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 10/19/2018] [Indexed: 11/09/2022]
Abstract
During an investigation into the potential union of Lewis basic isothiourea organocatalysis and gold catalysis, the formation of gold-isothiourea complexes was observed. These novel gold complexes were formed in high yield and were found to be air- and moisture stable. A series of neutral and cationic chiral gold(I) and gold(III) complexes bearing enantiopure isothiourea ligands was therefore synthesized and fully characterized. The steric and electronic properties of the isothiourea ligands was assessed through calculation of their percent buried volume and the synthesis and analysis of novel iridium(I)-isothiourea carbonyl complexes. The novel gold(I)- and gold(III)-isothiourea complexes have been applied in preliminary catalytic and biological studies, and display promising preliminary levels of catalytic activity and potency towards cancerous cell lines and clinically relevant enzymes.
Collapse
Affiliation(s)
- Danila Gasperini
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Mark D Greenhalgh
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Rehan Imad
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Shezaib Siddiqui
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Anum Malik
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Fizza Arshad
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan
| | - Muhammad Iqbal Choudhary
- H.E.J Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, Karachi, 75270, Pakistan.,Department of Biochemistry, Faculty of Science, King Abdulaziz University, Jeddah, 21412, Saudi Arabia
| | - Abdullah M Al-Majid
- Department of Chemistry and Center for Sustainable Chemistry, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Steven P Nolan
- Department of Chemistry and Center for Sustainable Chemistry, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.,Chemistry Department, College of Science, Ghent University, Krijgslaan 281, 9000, Ghent, Belgium
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| |
Collapse
|
40
|
Kreuzahler M, Daniels A, Wölper C, Haberhauer G. 1,3-Chlorine Shift to a Vinyl Cation: A Combined Experimental and Theoretical Investigation of the E-Selective Gold(I)-Catalyzed Dimerization of Chloroacetylenes. J Am Chem Soc 2019; 141:1337-1348. [PMID: 30588811 DOI: 10.1021/jacs.8b11501] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Metal-catalyzed dimerization reactions of terminal acetylenes are well known in the literature. However, only a few examples of the dimerization of halogen-substituted acetylenes are described. The products of the latter metal-catalyzed dimerization are the branched head-to-tail enynes. The formation of the corresponding linear head-to-head enynes has not been reported yet. Herein, we demonstrate by means of quantum chemical methods and experiments that the head-to-head dimerization of chloroarylacetylenes can be achieved via mono gold catalysis. Under the optimized conditions, a clean and complete conversion of the starting materials is observed and the dimeric products are obtained up to 75% NMR yield. A mechanistic investigation of the dimerization reaction reveals that the branched head-to-tail vinyl cation is energetically more stable than the corresponding linear head-to-head cation. However, the latter can rearrange by an unusual 1,3-chlorine shift, resulting in the highly stereoselective formation of the trans product, which corresponds to the gold complex of the head-to-head E-enyne. The activation barrier for this rearrangement is extremely low (ca. 2 kcal/mol). As the mono gold-catalyzed dimerization can be conducted in a preparative scale, this simple synthesis of trans-1,2-dichloroenynes makes the gold(I)-catalyzed head-to-head dimerization of chloroarylacetylenes an attractive method en route to more complex conjugated enyne systems and their congeners.
Collapse
Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische Chemie , Universität Duisburg-Essen , Universitätsstraße 7 , D-45117 Essen , Germany
| | - Alyssa Daniels
- Institut für Organische Chemie , Universität Duisburg-Essen , Universitätsstraße 7 , D-45117 Essen , Germany
| | - Christoph Wölper
- Institut für Organische Chemie , Universität Duisburg-Essen , Universitätsstraße 7 , D-45117 Essen , Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie , Universität Duisburg-Essen , Universitätsstraße 7 , D-45117 Essen , Germany
| |
Collapse
|
41
|
Kořenková M, Kremláček V, Erben M, Jirásko R, De Proft F, Turek J, Jambor R, RůŽička A, Císařová I, Dostál L. Heavier pnictinidene gold(i) complexes. Dalton Trans 2018; 47:14503-14514. [PMID: 30283956 DOI: 10.1039/c8dt03022g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
N,C,N-Chelated pnictinidenes ArE [where E = As, Sb or Bi; Ar = 2,6-(tBuN[double bond, length as m-dash]CH)2C6H3] were used as ligands for the coordination of various gold(i) complexes. Thus, the reaction of ArE with [AuCl(Me2S)] gave complexes [AuCl(ArE)] [where E = As (1) or Sb (2)] that exhibited only limited stability in solution. By contrast, the reaction of ArBi with [AuCl(Me2S)] led to the immediate deposition of gold metal and the oxidation of the bismuth atom giving ArBiCl2. The treatment of a tetrameric gold alkynyl complex [Au(C[triple bond, length as m-dash]CPh)]4 with ArAs and ArSb gave ionic compounds [Au(ArAs)2]+[Au2(C[triple bond, length as m-dash]CPh)3]- [denoted as 3+[Au2(C[triple bond, length as m-dash]CPh)3]-] and [Au(ArSb)2]+[Au(C[triple bond, length as m-dash]CPh)2]- [denoted as 4+[Au(C[triple bond, length as m-dash]CPh)2]-], respectively. Finally, the reaction of ArE with the carbene gold(i) complex [Au(IPr)(MeCN)]+[BF4]- [where IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolin-2-ylidene, MeCN = acetonitrile] produced ionic complexes [Au(IPr)(ArE)]+[BF4]- [for cations: E = As (5+), Sb (6+) or Bi (7+)]. All complexes were characterized using 1H and 13C NMR, high mass accuracy electrospray ionization mass spectrometry (ESI-MS), IR and Raman spectroscopy and (except for 1) by single-crystal X-ray diffraction analysis. Furthermore, the structure and bonding of both neutral and ionic complexes with different coordination patterns have also been investigated in detail using a Density Functional Theory (DFT) computational approach.
Collapse
Affiliation(s)
- Monika Kořenková
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ - 532, 10, Pardubice, Czech Republic.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Schießl J, Stein PM, Stirn J, Emler K, Rudolph M, Rominger F, Hashmi ASK. Strategic Approach on N
-Oxides in Gold Catalysis - A Case Study. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801007] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Jasmin Schießl
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Philipp M. Stein
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Judith Stirn
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Kirsten Emler
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Matthias Rudolph
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Frank Rominger
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - A. Stephen K. Hashmi
- Organisch-Chemisches Institut; Heidelberg University; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| |
Collapse
|
43
|
Svahn N, Moro AJ, Roma-Rodrigues C, Puttreddy R, Rissanen K, Baptista PV, Fernandes AR, Lima JC, Rodríguez L. The Important Role of the Nuclearity, Rigidity, and Solubility of Phosphane Ligands in the Biological Activity of Gold(I) Complexes. Chemistry 2018; 24:14654-14667. [DOI: 10.1002/chem.201802547] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 07/13/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Noora Svahn
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
| | - Artur J. Moro
- LAQV-REQUIMTE, Departamento de Química, CQFB; Universidade Nova de Lisboa; Monte de Caparica Portugal
| | - Catarina Roma-Rodrigues
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; Campus de Caparica 2829-516 Caparica Portugal
| | - Rakesh Puttreddy
- Department of Chemistry, Nanoscience Center; University of Jyvaskyla; P.O. Box 35 40014 Jyväskylä Finland
| | - Kari Rissanen
- Department of Chemistry, Nanoscience Center; University of Jyvaskyla; P.O. Box 35 40014 Jyväskylä Finland
| | - Pedro V. Baptista
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; Campus de Caparica 2829-516 Caparica Portugal
| | - Alexandra R. Fernandes
- UCIBIO, Departamento de Ciências da Vida, Faculdade de Ciências e Tecnologia; Universidade Nova de Lisboa; Campus de Caparica 2829-516 Caparica Portugal
| | - João Carlos Lima
- LAQV-REQUIMTE, Departamento de Química, CQFB; Universidade Nova de Lisboa; Monte de Caparica Portugal
| | - Laura Rodríguez
- Departament de Química Inorgànica i Orgànica, Secció de Química Inorgànica; Universitat de Barcelona; Martí i Franquès 1-11 08028 Barcelona Spain
- Institut de Nanociència i Nanotecnologia (IN2UB); Universitat de Barcelona; 08028 Barcelona Spain
| |
Collapse
|
44
|
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
| |
Collapse
|
45
|
Sirindil F, Nolan SP, Dagorne S, Pale P, Blanc A, de Frémont P. Synthesis, Characterization and Catalytic Activity of NHC Gold(I) Polyoxometalate Complexes. Chemistry 2018; 24:12630-12637. [DOI: 10.1002/chem.201801648] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 06/05/2018] [Indexed: 02/05/2023]
Affiliation(s)
- Fatih Sirindil
- Laboratoire de Synthèse, Réactivité Organique et Catalyse; Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
| | - Steven P. Nolan
- Department of Chemistry and Center for Sustainable Chemistry; Ghent University; Krijgslaan 281-S3 9000 Ghent Belgium
| | - Samuel Dagorne
- Equipe de Synthèse, Réactivité et Catalyse Organométalliques (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
| | - Patrick Pale
- Laboratoire de Synthèse, Réactivité Organique et Catalyse; Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
| | - Aurélien Blanc
- Laboratoire de Synthèse, Réactivité Organique et Catalyse; Institut de Chimie (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
| | - Pierre de Frémont
- Equipe de Synthèse, Réactivité et Catalyse Organométalliques (UMR 7177 CNRS); Université de Strasbourg; 4 rue Blaise Pascal, CS 90032 67081 Strasbourg France
| |
Collapse
|
46
|
Gleiter R, Haberhauer G. Cyclic Compounds Incorporating Two or Four Alkyne Units in Close Proximity - Theory and Experiments. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800072] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Rolf Gleiter
- Organisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie; Universität Duisburg-Essen; Universitätsstr. 7 45117 Essen Germany
| |
Collapse
|
47
|
Elena de Orbe M, Echavarren AM. Broadening the Scope of the Gold-Catalyzed [2+2] Cycloaddition Reaction: Synthesis of Vinylcyclobutenes and Further Transformations. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800170] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- M. Elena de Orbe
- Institute of Chemical Research of Catalonia (ICIQ); Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
| | - Antonio M. Echavarren
- Institute of Chemical Research of Catalonia (ICIQ); Barcelona Institute of Science and Technology; Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Orgànica i Analítica; Universitat Rovira i Virgili; C/ Marcel. lí Domingo s/n 43007 Tarragona Spain
| |
Collapse
|
48
|
Marichev KO, Patil SA, Bugarin A. Recent advances in the synthesis, structural diversity, and applications of mesoionic 1,2,3-triazol-5-ylidene metal complexes. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.04.013] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
49
|
Albayer M, Corbo R, Dutton JL. Well defined difluorogold(iii) complexes supported by N-ligands. Chem Commun (Camb) 2018; 54:6832-6834. [DOI: 10.1039/c8cc02535e] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Rare difluorogold(iii) complexes supported by N-ligands can be synthesized simply either from Au(i) precursors using XeF2 or Au(iii) using KF.
Collapse
Affiliation(s)
- Mohammad Albayer
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University
- Melbourne
- Australia
| | - Robert Corbo
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University
- Melbourne
- Australia
| | - Jason L. Dutton
- Department of Chemistry and Physics, La Trobe Institute for Molecular Science, La Trobe University
- Melbourne
- Australia
| |
Collapse
|
50
|
Kreuzahler M, Fabig S, Haberhauer G, Gleiter R. Au(I)-Catalyzed Dimerization of Two Alkyne Units-Interplay between Butadienyl and Cyclopropenylmethyl Cation: Model Studies and Trapping Experiments. J Org Chem 2017; 82:13572-13582. [PMID: 29149572 DOI: 10.1021/acs.joc.7b02843] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In recent years, Au(I)-catalyzed reactions proved to be a valuable tool for the synthesis of substituted cycles by cycloaromatization and cycloisomerization starting from alkynes. Despite the myriad of Au(I)-catalyzed reactions of alkynes, the mono Au(I)-catalyzed pendant to the radical dimerization of nonconjugated alkyne units has not been investigated by quantum chemical calculations. Herein, by means of quantum chemical calculations, we describe the mono Au(I)-catalyzed dimerization of two alkyne units as well as the transannular ring closure reaction of a nonconjugated diyne. We found that depending on the system and the method used either the corresponding cyclopropenylmethyl cation or the butadienyl cation represents the stable intermediate. This circumstance could be explained by different stabilizing effects. Moreover, the calculation reveals a dramatic (>1012-fold) acceleration of the Au(I)-catalyzed reaction compared to that of the noncatalyzed radical variant. Trapping experiments with a substituted 1,6-cyclodecadiyne using benzene as a solvent at room temperature as well as studies with deuterated solvents confirm the calculations. In this context, we also demonstrate that trapping of the cationic intermediate with benzene does not proceed via a Friedel-Crafts-type reaction.
Collapse
Affiliation(s)
- Mathis Kreuzahler
- Institut für Organische Chemie, Universität Duisburg-Essen , Universitätsstrasse 7, D-45117 Essen, Germany
| | - Sven Fabig
- Institut für Organische Chemie, Universität Duisburg-Essen , Universitätsstrasse 7, D-45117 Essen, Germany
| | - Gebhard Haberhauer
- Institut für Organische Chemie, Universität Duisburg-Essen , Universitätsstrasse 7, D-45117 Essen, Germany
| | - Rolf Gleiter
- Organisch-Chemisches Institut, Universität Heidelberg , Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| |
Collapse
|