1
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Antsiburov I, Stephan J, Weininger RJJ, Gemel C, Fischer RA. Copper Imidazolin-imine Coordination Compounds as Precursors for a Cu/Al Complex. Inorg Chem 2024; 63:17331-17339. [PMID: 39258868 DOI: 10.1021/acs.inorgchem.4c02530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/12/2024]
Abstract
The reactions of [(CF3SO3Cu)2(C6H6)] with the sterically hindered imidazolin-2-imine ligands DippImTMS (1,3-Bis(2,6-diisopropylphenyl)-2-(trimethylsilylimino)imidazoline) or DippImH (1,3-bis(2,6-diisopropylphenyl) imidazolin-2-imine) lead to the formation of the linear copper(I) complexes [Cu(DippImTMS)(OTf)] (1) and [Cu(DippImH)2][OTf] (2), respectively. The triflate counteranion in 2 can be easily exchanged to the weakly coordinating [BArF] giving [Cu(DippImH)2][BArF] (3) (BArF = tetrakis[3,5-bis(trifluoromethyl)phenyl]borate). Substitution of the N-heterocyclic imine (NHI) ligand in 3 by AlCp* (Cp* = pentamethylcyclopentadienyl) gives the tetrahedral [Cu(AlCp*)4][BArF] (5). The reaction between lithiated imidazolin-2-iminate DippImLi and CuCl results in the triangular cluster [Cu3(DippIm)2Cl] (4). All products have been fully characterized by 1H- and 13C NMR, mass spectrometry, as well as SC-XRD.
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Affiliation(s)
- Ivan Antsiburov
- Technical University of Munich, School of Natural Sciences, Department of Chemistry, Chair of Inorganic and Metal-Organic Chemistry Lichtenbergstrasse 4, 85748 Garching, Germany
- Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer Strasse 1, 85748 Garching, Germany
| | - Johannes Stephan
- Technical University of Munich, School of Natural Sciences, Department of Chemistry, Chair of Inorganic and Metal-Organic Chemistry Lichtenbergstrasse 4, 85748 Garching, Germany
- Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer Strasse 1, 85748 Garching, Germany
| | - Richard J J Weininger
- Technical University of Munich, School of Natural Sciences, Department of Chemistry, Chair of Inorganic and Metal-Organic Chemistry Lichtenbergstrasse 4, 85748 Garching, Germany
- Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer Strasse 1, 85748 Garching, Germany
| | - Christian Gemel
- Technical University of Munich, School of Natural Sciences, Department of Chemistry, Chair of Inorganic and Metal-Organic Chemistry Lichtenbergstrasse 4, 85748 Garching, Germany
- Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer Strasse 1, 85748 Garching, Germany
| | - Roland A Fischer
- Technical University of Munich, School of Natural Sciences, Department of Chemistry, Chair of Inorganic and Metal-Organic Chemistry Lichtenbergstrasse 4, 85748 Garching, Germany
- Technical University of Munich, Catalysis Research Center, Ernst-Otto-Fischer Strasse 1, 85748 Garching, Germany
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2
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Zhu T, Zhan W, Fan W, Zhang X. Research on Synthesis, Structure, and Catalytic Performance of Tetranuclear Copper(I) Clusters Supported by 2-Mercaptobenz-zole-Type Ligands. Molecules 2024; 29:4228. [PMID: 39275077 PMCID: PMC11396812 DOI: 10.3390/molecules29174228] [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: 08/05/2024] [Revised: 08/26/2024] [Accepted: 09/04/2024] [Indexed: 09/16/2024] Open
Abstract
Tetrahedral copper(I) clusters [Cu4(MBIZ)4(PPh3)2] (2), [Cu4(MBOZ)4(PPh3)4] (6) (MBIZ = 2-mercaptobenzimidazole, MBOZ = 2-mercaptobenzoxazole) were prepared by regulation of the copper-thiolate clusters [Cu6(MBIZ)6] (1) and [Cu8(MBOZ)8I]- (5) with PPh3. With the presence of iodide anion, the regulation provided the iodide-containing clusters [CuI4(MBIZ)3(PPh3)3I] (3) and [CuI4(MBOZ)3(PPh3)3I] (7). The cyclic voltammogram of 3 in MeCN (0.1 M nBu4NPF6, 298 K) at a scan rate of 100 mV s-1 shows two oxidation processes at Epa = +0.11 and +0.45 V with return waves observed at Epc = +0.25 V (vs. Fc+/Fc). Complex 3 has a higher capability to lose and gain electrons in the redox processes than complexes 2, 4, 4', 6, and 7. Its thermal stability was confirmed by thermogravimetric analysis. The catalytic performance of 3 was demonstrated by the catalytic transformation of iodobenzenes to benzonitriles using AIBN as the cyanide source. The nitrile products show potential applications in the preparation of 1,3,5-triazine compounds for organic fluorescence materials.
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Affiliation(s)
- Tingyu Zhu
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350002, China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
- Fujian College, University of Chinese Academy of Sciences, Fuzhou 350002, China
| | - Wangyuan Zhan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350002, China
- College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007, China
- Fujian College, University of Chinese Academy of Sciences, Fuzhou 350002, China
| | - Weibin Fan
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350002, China
| | - Xiaofeng Zhang
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, University of Chinese Academy of Sciences, Fuzhou 350002, China
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3
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Gerz I, Aunan ES, Finelli V, Abu Rasheed M, Deplano G, Cortez S P R, Schmidtke IL, Wragg DS, Signorile M, Hylland KT, Borfecchia E, Lillerud KP, Bordiga S, Olsbye U, Amedjkouh M. Enabling a bioinspired N, N, N-copper coordination motif through spatial control in UiO-67: synthesis and reactivity. Dalton Trans 2024; 53:8141-8153. [PMID: 38483202 DOI: 10.1039/d3dt03096b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/15/2024]
Abstract
Metal-organic frameworks (MOFs) featuring zirconium-based clusters are widely used for the development of functionalized materials due to their exceptional stability. In this study, we report the synthesis of a novel N,N,N-ligand compatible with a biphenyl dicarboxylic acid-based MOF. However, the resulting copper(I) complex exhibited unexpected coordination behaviour, lacking the intended trifold coordination motif. Herein, we demonstrate the successful immobilization of a bioinspired ligand within the MOF, which preserved its crystalline and porous nature while generating a well-defined copper site. Comprehensive spectroscopic analyses, including X-ray absorption, UV/Vis, and infrared spectroscopy, were conducted to investigate the copper site and its thermal behaviour. The immobilized ligand exhibited the desired tridentate coordination to copper, providing access to a coordination motif otherwise unattainable. Notably, water molecules were also found to coordinate to copper. Upon heating, the copper centre within the MOF exhibited reversible dehydration, suggesting facile creation of open coordination sites. Furthermore, the copper site displayed reduction at elevated temperatures and subsequent susceptibility to oxidation by molecular oxygen. Lastly, both the molecular complexes and the MOF were evaluated as catalysts for the oxidation of cyclohexane using hydrogen peroxide. This work highlights the successful immobilization of a bioinspired ligand in a zirconium-based MOF, shedding light on the structural features, thermal behaviour, and catalytic potential of the resulting copper sites.
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Affiliation(s)
- Isabelle Gerz
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Erlend S Aunan
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Valeria Finelli
- Department of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15/A, I-10135, and Via P. Giuria 7, I-10125, Turin, Italy
- University School for Advanced Studies, IUSS Pavia, Palazzo del Broletto, Piazza della Vittoria 15, I-27100, Pavia, Italy
| | - Mouhammad Abu Rasheed
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Gabriele Deplano
- Department of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15/A, I-10135, and Via P. Giuria 7, I-10125, Turin, Italy
| | - Rafael Cortez S P
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Inga L Schmidtke
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Oslo, N-0315 Oslo, Norway
| | - David S Wragg
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Matteo Signorile
- Department of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15/A, I-10135, and Via P. Giuria 7, I-10125, Turin, Italy
| | - Knut T Hylland
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Elisa Borfecchia
- Department of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15/A, I-10135, and Via P. Giuria 7, I-10125, Turin, Italy
| | - Karl Petter Lillerud
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Silvia Bordiga
- Department of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15/A, I-10135, and Via P. Giuria 7, I-10125, Turin, Italy
| | - Unni Olsbye
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
| | - Mohamed Amedjkouh
- Department of Chemistry, University of Oslo, P. O. Box 1033 Blindern, N-0315 Oslo, Norway
- Centre for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1126 Blindern, N-0316 Oslo, Norway
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4
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Gridneva T, Karimata A, Bansal R, Fayzullin RR, Vasylevskyi S, Bruhacs A, Khusnutdinova JR. Deep-red photoluminescent mechanoresponsive polymers with dynamic Cu I-arylamide mechanophores. Chem Commun (Camb) 2023; 60:212-215. [PMID: 38050702 DOI: 10.1039/d3cc04643e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
We demonstrate the use of copper arylamide complexes as efficient photoluminescent mechanophores to design deep-red/near-IR emissive polymers showing reversible changes in photoluminescence intensity in the red/near-IR region in response to mechanical stretching. The mechanoresponse was repeatable over 30 cycles, showing a measurable increase of photoluminescence intensity even at a small applied stress of ca. 0.01 MPa. We demonstrate the potential of using conformationally dynamic copper amide complexes as sensitive and reversible mechanophores for near-IR imaging; systematic control over the emission range was achieved using amide modification.
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Affiliation(s)
- Tatiana Gridneva
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0412, Japan.
| | - Ayumu Karimata
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0412, Japan.
| | - Richa Bansal
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0412, Japan.
| | - Robert R Fayzullin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Street, Kazan 420088, Russian Federation
| | - Serhii Vasylevskyi
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0412, Japan.
| | - Andrew Bruhacs
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0412, Japan.
| | - Julia R Khusnutdinova
- Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha, Onna-son, Kunigami-gun, Okinawa, 904-0412, Japan.
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5
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Jia C, She Y, Lu Y, Wu M, Yang X, Chen L, Li Y. Octalithium, Tetrasodium, and Decalithium Compounds Based on Pyrrolyl Ligands: Synthesis, Structures, and Activation of the C-H Bonds of Pyrrolyl Rings and C═N Bonds of a Series of Ligands by Organolithium Reagents. Inorg Chem 2023; 62:14072-14085. [PMID: 37578854 DOI: 10.1021/acs.inorgchem.3c02208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/16/2023]
Abstract
The organometallic compounds of lithium ions have garnered continuous interest as indispensable precursors for the syntheses of organometallic complexes of main-group metals, transition metals, lanthanide metals, and actinide metals. In this work, we present a strategy for the preparation of a series of polynuclear lithium complexes. This methodology features the utilization of organolithium reagents both as metal sources to coordinate with the ligands and as nucleophilic reagents to undergo nucleophilic addition to the C═N bonds of the ligands. Reaction of a ligand HL1 [HL1 = 2-(((1-(2-(dimethylamino)ethyl)-1H-pyrrol-2-yl)methylene)amino)phenol] with n-BuLi produced complex [Li8(L1a)4]·1.5Tol (1·1.5Tol) [H2L1a = 2-((1-(1-(2-(dimethylamino)ethyl)-1H-pyrrol-2-yl)pentyl)amino)phenol]. One prominent feature regarding the formation of 1·1.5Tol is the occurrence of nucleophilic addition of n-BuLi to the C═N bond of HL1, leading to the generation of a new [L1a]2- ligand that contains both aminophenol and 1-(2-pyrrolyl)alkylamine scaffolds. The developed protocol can be adapted to a series of organolithium reagents. Compounds [Li8(L1b)4] (2) and [Li8(L1c)4] (3) were afforded by treatment of HL1 with sec-BuLi and LiCH2SiMe3, respectively. Reaction of an analogous ligand HL2 [HL2 = 2-(((1-(2-(dimethylamino)ethyl)-1H-pyrrol-2-yl)methylene)amino)-4-methylphenol] with n-BuLi generated compound [Li8(L2a)4] (4). C═N bond activation was not observed in the reaction of HL1 with NaOtBu, and the complex [Na4(L1)4]·Tol (5·Tol) was obtained. A decanuclear complex [Li10(L3a)2(L3b)2] (6) was also prepared via the reaction of HL3 [HL3 = 2-(2-((((1H-pyrrol-2-yl)methylene)amino)methyl)-1H-pyrrol-1-yl)-N,N-dimethylethan-1-amine] with t-BuLi. A remarkable feature in terms of the synthesis of 6 is the simultaneous occurrence of hydrogen atom abstraction from the C-H bond of the pyrrolyl ring and nucleophilic addition to the C═N bond of the HL3 ligand by t-BuLi. A series of amines containing biologically and physiologically important moieties were achieved by hydrolysis of the crude products from the reactions of the HL1-HL3 ligands and organolithium reagents. This work provides an efficient approach to high-nuclearity lithium compounds as well as a series of amines.
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Affiliation(s)
- Chaohong Jia
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Yeye She
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Yanhua Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Mengxiang Wu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Xiaohan Yang
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Ling Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
| | - Yahong Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, People's Republic of China
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6
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Osei MK, Mirzaei S, Bogetti X, Castro E, Rahman MA, Saxena S, Hernández Sánchez R. Synthesis of Square Planar Cu
4
Clusters. Angew Chem Int Ed Engl 2022; 61:e202209529. [DOI: 10.1002/anie.202209529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Manasseh Kusi Osei
- Department of Chemistry Rice University 6100 Main St. Houston TX 77005 USA
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Saber Mirzaei
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Xiaowei Bogetti
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Edison Castro
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Mohammad Azizur Rahman
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Sunil Saxena
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
| | - Raúl Hernández Sánchez
- Department of Chemistry Rice University 6100 Main St. Houston TX 77005 USA
- Department of Chemistry University of Pittsburgh 219 Parkman Avenue Pittsburgh PA 15260 USA
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7
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Osei MK, Mirzaei S, Bogetti X, Castro E, Rahman MA, Saxena S, Hernandez Sanchez R. Synthesis of Square Planar Cu4 Clusters. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202209529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Manasseh Kusi Osei
- University of Pittsburgh Department of Chemistry 219 Parkman Ave 15260 Pittsburgh UNITED STATES
| | - Saber Mirzaei
- University of Pittsburgh Department of Chemistry 219 Parkman Avenue 15260 Pittsburgh UNITED STATES
| | - Xiaowei Bogetti
- University of Pittsburgh Department of Chemistry 219 Parkman Ave 15260 Pittsburgh UNITED STATES
| | - Edison Castro
- University of Pittsburgh Department of Chemistry 219 Parkman Ave 15260 Pittsburgh UNITED STATES
| | - Mohammad Azizur Rahman
- University of Pittsburgh Department of Chemistry 219 Parkman Ave 15260 Pittsburgh UNITED STATES
| | - Sunil Saxena
- University of Pittsburgh Department of Chemistry 219 Parkman Ave 15260 Pittsburgh UNITED STATES
| | - Raul Hernandez Sanchez
- Rice University Wiess School of Natural Sciences Chemistry 6100 Main St. 77005 Houston UNITED STATES
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8
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Gerz I, Jannuzzi SAV, Hylland KT, Negri C, Wragg DS, Øien‐Ødegaard S, Tilset M, Olsbye U, DeBeer S, Amedjkouh M. Structural Elucidation, Aggregation, and Dynamic Behaviour of N,N,N,N-Copper(I) Schiff Base Complexes in Solid and in Solution: A Combined NMR, X-ray Spectroscopic and Crystallographic Investigation. Eur J Inorg Chem 2021; 2021:4762-4775. [PMID: 35874966 PMCID: PMC9298233 DOI: 10.1002/ejic.202100722] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 09/22/2021] [Indexed: 12/30/2022]
Abstract
A series of Cu(I) complexes of bidentate or tetradentate Schiff base ligands bearing either 1-H-imidazole or pyridine moieties were synthesized. The complexes were studied by a combination of NMR and X-ray spectroscopic techniques. The differences between the imidazole- and pyridine-based ligands were examined by 1H, 13C and 15N NMR spectroscopy. The magnitude of the 15Nimine coordination shifts was found to be strongly affected by the nature of the heterocycle in the complexes. These trends showed good correlation with the obtained Cu-Nimine bond lengths from single-crystal X-ray diffraction measurements. Variable-temperature NMR experiments, in combination with diffusion ordered spectroscopy (DOSY) revealed that one of the complexes underwent a temperature-dependent interconversion between a monomer, a dimer and a higher aggregate. The complexes bearing tetradentate imidazole ligands were further studied using Cu K-edge XAS and VtC XES, where DFT-assisted assignment of spectral features suggested that these complexes may form polynuclear oligomers in solid state. Additionally, the Cu(II) analogue of one of the complexes was incorporated into a metal-organic framework (MOF) as a way to obtain discrete, mononuclear complexes in the solid state.
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Affiliation(s)
- Isabelle Gerz
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | | | - Knut T. Hylland
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | - Chiara Negri
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | - David S. Wragg
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | - Sigurd Øien‐Ødegaard
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | - Mats Tilset
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | - Unni Olsbye
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
| | - Serena DeBeer
- Department of Inorganic SpectroscopyMax Planck Institute for Chemical Energy ConversionStiftstraße 34–3645470Mülheim an der RuhrGermany
| | - Mohamed Amedjkouh
- Department of ChemistryUniversity of OsloP. O. Box 1033 Blindern0315OsloNorway
- Centre for Materials Science and NanotechnologyUniversity of OsloP.O. Box 1126 Blindern0316OsloNorway
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9
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Liebing P, Merzweiler K. cyclo-Tetra-kis-(μ-2,4,6-tri-methyl-phenyl-κ C 1:κ C 1)bis-(tri-methyl-phosphane)-1κ P,3κ P-tetra-copper(I). IUCRDATA 2021; 6:x210594. [PMID: 36337326 PMCID: PMC9462343 DOI: 10.1107/s2414314621005940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 06/08/2021] [Indexed: 11/10/2022] Open
Abstract
The title compound, [Cu4(C9H11)4(C3H9P)2] or [Cu4(Mes)4(PMe3)2] (Mes = 2,4,6-tri-methyl-phenyl), was synthesized from copper(I) mesityl and tri-methyl-phosphane in THF as solvent. The mol-ecular structure of the complex has C 2 symmetry and consists of four copper(I) atoms bridged by four μ-mesityl groups, giving an eight-membered puckered {Cu4C4} ring. Additionally, two copper(I) atoms at opposite corners of the Cu4 rhomb are each linked to a terminal PMe3 ligand. The PMe3-bearing copper(I) atoms exhibit a distorted trigonal-planar coordination mode whereas the remaining Cu atoms linked to two mesityl groups are nearly linearly coordinated.
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Affiliation(s)
- Phil Liebing
- Martin-Luther-Universität Halle, Naturwissenschaftliche Fakultät II, Institut für Chemie, Germany
| | - Kurt Merzweiler
- Martin-Luther-Universität Halle, Naturwissenschaftliche Fakultät II, Institut für Chemie, Germany
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10
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Moglie Y, Mascaró E, Zacconi F, Radivoy G. Copper Nanoparticles Supported on Zinc Oxide as Efficient Catalyst for the
N
‐Arylation of (Hetero)cyclic and Acyclic Amides. ChemistrySelect 2021. [DOI: 10.1002/slct.202101011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yanina Moglie
- Departamento de Química INQUISUR Universidad Nacional del Sur (UNS)-CONICET Avda. Alem 1253 8000 Bahía Blanca Argentina
| | - Evangelina Mascaró
- Departamento de Química INQUISUR Universidad Nacional del Sur (UNS)-CONICET Avda. Alem 1253 8000 Bahía Blanca Argentina
| | - Flavia Zacconi
- Facultad de Química y de Farmacia Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul Santiago 7820436 Chile
- Institute for Biological and Medical Engineering Schools of Engineering Medicine and Biological Sciences Pontificia Universidad Católica de Chile Av. Vicuña Mackenna 4860 Macul Santiago 7820436 Chile
| | - Gabriel Radivoy
- Departamento de Química INQUISUR Universidad Nacional del Sur (UNS)-CONICET Avda. Alem 1253 8000 Bahía Blanca Argentina
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11
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Shoberu A, Li CK, Qian HF, Zou JP. Copper-catalyzed, N-auxiliary group-controlled switchable transannulation/nitration initiated by nitro radicals: selective synthesis of pyridoquinazolones and 3-nitroindoles. Org Chem Front 2021. [DOI: 10.1039/d1qo01141c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Within the scope of nitration reactions, the efficiency of sensitive heteroaromatics such as indoles is often eroded by various competitive oxidative decomposition pathways.
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Affiliation(s)
- Adedamola Shoberu
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Cheng-Kun Li
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Hai-Feng Qian
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
| | - Jian-Ping Zou
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry and Chemical Engineering, Soochow University, 199 Renai Street, Suzhou, Jiangsu 215123, China
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12
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Fey N, Koumi A, Malkov AV, Moseley JD, Nguyen BN, Tyler SNG, Willans CE. Mapping the properties of bidentate ligands with calculated descriptors (LKB-bid). Dalton Trans 2020; 49:8169-8178. [DOI: 10.1039/d0dt01694b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand space for bidentates has been mapped, computationally, varying donors, substituents and backbones, to give a new database, LKB-bid.
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Affiliation(s)
- Natalie Fey
- School of Chemistry
- University of Bristol
- Bristol BS8 1TS
- UK
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13
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Sadanandan S, Gupta DK. Changing stereoselectivity and regioselectivity in copper( i)-catalyzed 5- exo cyclization by chelation and rigidity in aminoalkyl radicals: synthesis towards diverse bioactive N-heterocycles. NEW J CHEM 2020. [DOI: 10.1039/c9nj05166j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Chelation, rigidity and carbon-radical positions in aminoalkyl precursors disturb the usual 2,4-trans diastereoselectivity and 5-exo mode in Cu(i)-catalyzed ATRC.
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14
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New Insights into the Reaction Capabilities of Ionic Organic Bases in Cu-Catalyzed Amination. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900109] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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15
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Nejati K, Ahmadi S, Nikpassand M, Kheirollahi Nezhad PD, Vessally E. Diaryl ethers synthesis: nano-catalysts in carbon-oxygen cross-coupling reactions. RSC Adv 2018; 8:19125-19143. [PMID: 35539660 PMCID: PMC9080655 DOI: 10.1039/c8ra02818d] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2018] [Accepted: 05/06/2018] [Indexed: 12/05/2022] Open
Abstract
The diaryl ether moiety is not only prevalent in a significant number of natural products and synthetic pharmaceuticals but also widely found in many pesticides, polymers, and ligands. Ullmann-type cross-coupling reactions between phenols and aryl halides are regarded as one of the most important methods for the synthesis of this important and versatile structural motif. In recent years, the use of nano-sized metal catalysts in this coupling reaction has attracted a lot of attention because of these catalysts with their high surface-to-volume ratio, high surface energy, and reactive morphology allows for rapid C-O bond formation under mild and ligand-free conditions. In this review we will highlight the power of these catalysts in Ullmann-type C-O cross-coupling reactions.
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Affiliation(s)
- Kamellia Nejati
- Department of Chemistry, Payame Noor University P. O. Box 19395-1697 Tehran Iran
| | - Sheida Ahmadi
- Department of Chemistry, Payame Noor University P. O. Box 19395-1697 Tehran Iran
| | | | | | - Esmail Vessally
- Department of Chemistry, Payame Noor University P. O. Box 19395-1697 Tehran Iran
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16
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Lo QA, Sale D, Braddock DC, Davies RP. Mechanistic and Performance Studies on the Ligand-Promoted Ullmann Amination Reaction. ACS Catal 2017. [DOI: 10.1021/acscatal.7b03664] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Quintin A. Lo
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - David Sale
- Process
Studies Group, Jealott’s Hill Research Centre, Syngenta, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - D. Christopher Braddock
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Robert P. Davies
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
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17
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Sherborne GJ, Adomeit S, Menzel R, Rabeah J, Brückner A, Fielding MR, Willans CE, Nguyen BN. Origins of high catalyst loading in copper(i)-catalysed Ullmann-Goldberg C-N coupling reactions. Chem Sci 2017; 8:7203-7210. [PMID: 29147546 PMCID: PMC5688446 DOI: 10.1039/c7sc02859h] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 08/29/2017] [Indexed: 12/20/2022] Open
Abstract
A mechanistic investigation of Ullmann-Goldberg reactions using soluble and partially soluble bases led to the identification of various pathways for catalyst deactivation through (i) product inhibition with amine products, (ii) by-product inhibition with inorganic halide salts, and (iii) ligand exchange by soluble carboxylate bases. The reactions using partially soluble inorganic bases showed variable induction periods, which are responsible for the reproducibility issues in these reactions. Surprisingly, more finely milled Cs2CO3 resulted in a longer induction period due to the higher concentration of the deprotonated amine/amide, leading to suppressed catalytic activity. These results have significant implications on future ligand development for the Ullmann-Goldberg reaction and on the solid form of the inorganic base as an important variable with mechanistic ramifications in many catalytic reactions.
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Affiliation(s)
- Grant J Sherborne
- Institute of Process Research & Development , School of Chemistry , University of Leeds , Woodhouse Lane , Leeds , LS2 9JT , UK .
| | - Sven Adomeit
- Leibniz Institut für Katalyse e.V , Albert-Einstein Straβe 29a , 18059 , Rostock , Germany
| | - Robert Menzel
- Institute of Process Research & Development , School of Chemistry , University of Leeds , Woodhouse Lane , Leeds , LS2 9JT , UK .
| | - Jabor Rabeah
- Leibniz Institut für Katalyse e.V , Albert-Einstein Straβe 29a , 18059 , Rostock , Germany
| | - Angelika Brückner
- Leibniz Institut für Katalyse e.V , Albert-Einstein Straβe 29a , 18059 , Rostock , Germany
| | - Mark R Fielding
- AstraZeneca , Pharmaceutical Technology and Development , Etherow T41/18, Silk Road Business Park, Charter Way , Macclesfield , SK10 2NA , UK
| | - Charlotte E Willans
- Institute of Process Research & Development , School of Chemistry , University of Leeds , Woodhouse Lane , Leeds , LS2 9JT , UK .
| | - Bao N Nguyen
- Institute of Process Research & Development , School of Chemistry , University of Leeds , Woodhouse Lane , Leeds , LS2 9JT , UK .
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18
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Peel AJ, Ackroyd R, Wheatley AEH. Metal exchange in lithiocuprates: implications for our understanding of structure and reactivity. Chem Sci 2017; 8:4904-4916. [PMID: 28959414 PMCID: PMC5603898 DOI: 10.1039/c7sc01423f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Accepted: 04/28/2017] [Indexed: 11/21/2022] Open
Abstract
New reagents have been sought for directed ortho cupration in which the use of cyanide reagents is eliminated. CuOCN reacts with excess TMPLi (TMP = 2,2,6,6-tetramethylpiperidide) in the presence of limited donor solvent to give crystals that are best represented as (TMP)2Cu0.1Li0.9(OCN)Li2(THF) 8, whereby both Lipshutz-type lithiocuprate (TMP)2Cu(OCN)Li2(THF) 8a and trinuclear (TMP)2(OCN)Li3(THF) 8b are expressed. Treatment of a hydrocarbon solution of TMP2CuLi 9a with LiOCN and THF gives pure 8a. Meanwhile, formation of 8b is systematized by reacting (TMPH2)OCN 10 with TMPH and nBuLi to give (TMP)2(OCN)Li3(THF)211. Important to the attribution of lower/higher order bonding in lithiocuprate chemistry is the observation that in crystalline 8, amide-bridging Cu and Li demonstrate clear preferences for di- and tricoordination, respectively. A large excess of Lewis base gives an 8-membered metallacycle that retains metal disorder and analyses as (TMP)2Cu1.35Li0.659 in the solid state. NMR spectroscopy identifies 9 as a mixture of (TMP)2CuLi 9a and other copper-rich species. Crystals from which the structure of 8 was obtained dissolve to yield evidence for 8b coexisting in solution with in situ-generated 9a, 11 and a kinetic variant on 9a ( i-9a), that is best viewed as an agglomerate of TMPLi and TMPCu. Moving to the use of DALi (DA = diisopropylamide), (DA)2Cu0.09Li0.91(Br)Li2(TMEDA)212 (TMEDA = N,N,N',N'-tetremethylethylenediamine) is isolated, wherein (DA)2Cu(Br)Li2(TMEDA)212a exhibits lower-order Cu coordination. The preparation of (DA)2Li(Br)Li2(TMEDA)212b was systematized using (DAH2)Br, DAH and nBuLi. Lastly, metal disorder is avoided in the 2 : 1 lithium amide : Lipshutz-type monomer adduct (DA)4Cu(OCN)Li4(TMEDA)213.
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Affiliation(s)
- Andrew J Peel
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW UK .
| | - Ryan Ackroyd
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW UK .
| | - Andrew E H Wheatley
- Department of Chemistry , University of Cambridge , Lensfield Road , Cambridge , CB2 1EW UK .
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19
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Pregosin PS. Applications of NMR diffusion methods with emphasis on ion pairing in inorganic chemistry: a mini-review. MAGNETIC RESONANCE IN CHEMISTRY : MRC 2017; 55:405-413. [PMID: 26888228 DOI: 10.1002/mrc.4394] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Revised: 11/05/2015] [Accepted: 11/11/2015] [Indexed: 06/05/2023]
Abstract
This mini-review provides a brief overview of the use of NMR diffusion methods in connection with estimating molecular weights in solution, recognizing hydrogen bonding and encapsulation processes and, primarily, identifying and estimating the varying degrees of ion pairing. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Paul S Pregosin
- Laboratorium für Anorganische Chemie, ETHZ HCI, Hönggerberg, CH-8093, Zürich, Switzerland
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20
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Lv W, Xiong B, Jiang H, Zhang M. Synthesis of 2-Alkylaminoquinolines and 1,8-Naphthyridines by Successive Ruthenium-Catalyzed Dehydrogenative Annulation andN-Alkylation Processes. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201601287] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Wan Lv
- State Key Laboratory of Pulp and Paper Engineering, and Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering; South China University of Technology; Wushan Rd-381 Guangzhou 510641 People's Republic of China
| | - Biao Xiong
- State Key Laboratory of Pulp and Paper Engineering, and Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering; South China University of Technology; Wushan Rd-381 Guangzhou 510641 People's Republic of China
| | - Huanfeng Jiang
- State Key Laboratory of Pulp and Paper Engineering, and Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering; South China University of Technology; Wushan Rd-381 Guangzhou 510641 People's Republic of China
| | - Min Zhang
- State Key Laboratory of Pulp and Paper Engineering, and Key Lab of Functional Molecular Engineering of Guangdong Province, School of Chemistry & Chemical Engineering; South China University of Technology; Wushan Rd-381 Guangzhou 510641 People's Republic of China
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21
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Jin X, Davies RP. Copper-catalysed aromatic-Finkelstein reactions with amine-based ligand systems. Catal Sci Technol 2017. [DOI: 10.1039/c7cy00538e] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient and low-cost ligand, diethylenetriamine, is shown to promote the copper catalysed Finkelstein reaction without the requirement of inert atmosphere conditions.
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Affiliation(s)
- Xiaodong Jin
- Department of Chemistry
- Imperial College London
- London
- UK
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22
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Liebing P, Freudenberg J, Heiser C, Merzweiler K. Novel Copper(I) Clusters with 2-(Diphenylphosphanyl)anilide Ligands. Synthesis and Crystal Structures of [Cu6X2(NHR)4] (X= Cl, Br, I;R= C6H4-2-PPh2). Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201600364] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Phil Liebing
- Institut für Chemie; Naturwissenschaftliche Fakultät II; Universität Halle; Kurt Mothes-Str. 2 06120 Halle Germany
| | - Jan Freudenberg
- Institut für Chemie; Naturwissenschaftliche Fakultät II; Universität Halle; Kurt Mothes-Str. 2 06120 Halle Germany
| | - Christian Heiser
- Institut für Chemie; Naturwissenschaftliche Fakultät II; Universität Halle; Kurt Mothes-Str. 2 06120 Halle Germany
| | - Kurt Merzweiler
- Institut für Chemie; Naturwissenschaftliche Fakultät II; Universität Halle; Kurt Mothes-Str. 2 06120 Halle Germany
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23
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Ram RN, Gupta DK. Direct and Stereoselective Synthesis of Diversely Substituted 2,4-trans-(NH)-Pyrrolidines by Copper(I)-Catalyzed Radical Cyclization at Low Temperature. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600844] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Ram N. Ram
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi - 110016 India
| | - Dharmendra Kumar Gupta
- Department of Chemistry; Indian Institute of Technology Delhi, Hauz Khas; New Delhi - 110016 India
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24
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Han J, Yin H, Liu C, Wang J, Jian X. Construction of donor-acceptor polymers containing thiophene-phthalazinone moiety via classic Ullmann C N coupling polymerization and their optical-electrical properties. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.08.090] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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25
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Antiñolo A, Carrillo-Hermosilla F, Fernández-Galán R, Martínez-Ferrer J, Alonso-Moreno C, Bravo I, Moreno-Blázquez S, Salgado M, Villaseñor E, Albaladejo J. Tris(pentafluorophenyl)borane as an efficient catalyst in the guanylation reaction of amines. Dalton Trans 2016; 45:10717-29. [PMID: 27278089 DOI: 10.1039/c6dt01237j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Tris(pentafluorophenyl)borane, [B(C6F5)3], has been used as an efficient catalyst in the guanylation reaction of amines with carbodiimide under mild conditions. A combined approach involving NMR spectroscopy and DFT calculations was employed to gain a better insight into the mechanistic features of this process. The results allowed us to propose a new Lewis acid-assisted Brønsted acidic pathway for the guanylation reaction. The process starts with the interaction of tris(pentafluorphenyl)borane and the amine to form the corresponding adduct, [(C6F5)3B-NRH2] , followed by a straightforward proton transfer to one of the nitrogen atoms of the carbodiimide, (i)PrN[double bond, length as m-dash]C[double bond, length as m-dash]N(i)Pr, to produce, in two consequent steps, a guanidine-borane adduct, [(C6F5)3B-NRC(N(i)PrH)2] . The rupture of this adduct liberates the guanidine product RNC(N(i)PrH)2 and interaction with additional amine restarts the catalytic cycle. DFT studies have been carried out in order to study the thermodynamic characteristics of the proposed pathway. Significant borane adducts with amines and guanidines have been isolated and characterized by multinuclear NMR in order to study the N-B interaction and to propose the existence of possible Frustrated Lewis Pairs. Additionally, the molecular structures of significant components of the catalytic cycle, namely 4-tert-butylaniline-[B(C6F5)3] adduct and both free and [B(C6F5)3]-bonded 1-(phenyl)-2,3-diisopropylguanidine, and respectively, have been established by X-ray diffraction.
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Affiliation(s)
- Antonio Antiñolo
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - Fernando Carrillo-Hermosilla
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - Rafael Fernández-Galán
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - Jaime Martínez-Ferrer
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - Carlos Alonso-Moreno
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario de Albacete, 02071-Albacete, Spain
| | - Iván Bravo
- Departamento de Química-Física, Facultad de Farmacia, Universidad de Castilla-La Mancha, Campus Universitario de Albacete, 02071-Albacete, Spain
| | - Sonia Moreno-Blázquez
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - Manuel Salgado
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - Elena Villaseñor
- Centro de Innovación en Química Avanzada (ORFEO-CINQA), Departamento de Química Inorgánica, Orgánica y Bioquímica, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain.
| | - José Albaladejo
- Departamento de Química-Física, Facultad de Ciencias y Tecnologías Químicas, Universidad de Castilla-La Mancha, Campus Universitario, E-13071 Ciudad Real, Spain
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26
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Sung S, Sale D, Braddock DC, Armstrong A, Brennan C, Davies RP. Mechanistic Studies on the Copper-Catalyzed N-Arylation of Alkylamines Promoted by Organic Soluble Ionic Bases. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00504] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Simon Sung
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - David Sale
- Process Studies
Group, Syngenta, Jealott’s Hill Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - D. Christopher Braddock
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Alan Armstrong
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
| | - Colin Brennan
- Process Studies
Group, Syngenta, Jealott’s Hill Research Centre, Bracknell, Berkshire RG42 6EY, United Kingdom
| | - Robert P. Davies
- Department
of Chemistry, Imperial College London, South Kensington, London SW7 2AZ, United Kingdom
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