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Jordan R, Schäfer SA, Sander N, Maisuls I, Hamacher C, Friedel J, Strassert CA, Klein A. Assessing the Character of the C 6F 5 Ligand from the Electrochemical and Photophysical Properties of [Ni(C 6F 5) 2(N ∧N)] Complexes. Inorg Chem 2024; 63:11079-11091. [PMID: 38843524 DOI: 10.1021/acs.inorgchem.4c00649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2024]
Abstract
Organonickel complexes containing α-diimine ligands [Ni(C6F5)2(N∧N)] (N∧N = 2,2'-bipyridine (bpy), 2,9-dimethyl-1,10-phenanthroline (dmphen), 3,4,7,8-tetramethyl-1,10-phenanthroline (tmphen), dipyrido[3,2-a:2',3'-c]phenazine (dppz), 1,4-bis(isopropyl)-1,4-diazabutadiene (iPr-DAB), and 1,4-bis(2,6-dimethylphenyl)-1,4-diazabutadiene (Xyl-DAB) were prepared and studied structurally, spectroscopically, and electrochemically. Their molecular structures from single-crystal X-ray diffraction show near-perfect square planar Ni(II) coordination except in the case of dmphen. Primary reversible electrochemical reductions in the range from -1 to -2 V vs ferrocene/ferrocenium couple lead to mainly diimine-localized radical anion complexes, while secondary reductions in the range from -2 to -2.5 V lead to dianion complexes, as shown through spectroelectrochemistry. Irreversible metal-centered oxidations at around 0.7 V result in rapid aryl-aryl reductive elimination and formation of decafluorobiphenyl. No photoluminescence was detected for the complexes containing chromophoric α-diimine ligands at room temperature. At 77 K in frozen glassy 2-Me-THF matrices, weak photoluminescence was detected for the dmphen and tmphen derivatives, with broad emission bands peaking around 570 nm. All results are rationalized with the support of (TD-)DFT calculations, highlighting the role of the C6F5 ligand in different systems.
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Affiliation(s)
- Rose Jordan
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Sascha A Schäfer
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Noah Sander
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Ivan Maisuls
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, CiMIC, SoN, Heisenbergstraße 11, 48149 Münster, Germany
| | - Claudia Hamacher
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Joshua Friedel
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
| | - Cristian A Strassert
- Institut für Anorganische und Analytische Chemie, Universität Münster, Corrensstraße 28/30, 48149 Münster, Germany
- CeNTech, CiMIC, SoN, Heisenbergstraße 11, 48149 Münster, Germany
| | - Axel Klein
- Department of Chemistry and Biochemistry, Institute for Inorganic Chemistry, University of Cologne, Faculty for Mathematics and Natural Sciences, Greinstrasse 6, D-50939 Köln, Germany
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2
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Tripathy A, Bisoyi A, P A, Venugopal S, Yatham VR. Synergistic Merger of Ketone, Halogen Atom Transfer (XAT), and Nickel-Mediated C(sp 3)-C(sp 2) Cross-Electrophile Coupling Enabled by Light. ACS ORGANIC & INORGANIC AU 2024; 4:229-234. [PMID: 38585508 PMCID: PMC10996044 DOI: 10.1021/acsorginorgau.3c00062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2023] [Revised: 11/30/2023] [Accepted: 12/01/2023] [Indexed: 04/09/2024]
Abstract
In the present manuscript, we have developed a unique catalytic system by merging photoexcited ketone catalysis, halogen atom transfer (XAT), and nickel catalysis to forge C(sp3)-C(sp2) cross-electrophile coupling products from unactivated iodoalkanes and (hetero)aryl bromides. The synergistic catalytic system works under mild reaction conditions and tolerates a variety of functional groups; moreover, this strategy allows the late-stage modification of medicinally relevant molecules. Preliminary mechanistic studies reveal the role of the α-aminoalkyl radical, which further participates in the XAT process with alkyl iodides to generate the desired alkyl radical, which eventually intercepts with the nickel catalytic cycle to liberate the products in good to excellent yields.
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Affiliation(s)
- Alisha
Rani Tripathy
- School
of Chemistry, Indian Institute of Science
Education and Research, Thiruvananthapuram 695551, India
| | - Akash Bisoyi
- School
of Chemistry, Indian Institute of Science
Education and Research, Thiruvananthapuram 695551, India
| | - Arya P
- School
of Chemistry, Indian Institute of Science
Education and Research, Thiruvananthapuram 695551, India
| | - Sreelakshmi Venugopal
- School
of Chemistry, Indian Institute of Science
Education and Research, Thiruvananthapuram 695551, India
| | - Veera Reddy Yatham
- School
of Chemistry, Indian Institute of Science
Education and Research, Thiruvananthapuram 695551, India
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3
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Dawson G, Spielvogel EH, Diao T. Nickel-Catalyzed Radical Mechanisms: Informing Cross-Coupling for Synthesizing Non-Canonical Biomolecules. Acc Chem Res 2023; 56:3640-3653. [PMID: 38033206 PMCID: PMC10734253 DOI: 10.1021/acs.accounts.3c00588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Revised: 10/30/2023] [Accepted: 11/03/2023] [Indexed: 12/02/2023]
Abstract
Nickel excels at facilitating selective radical chemistry, playing a pivotal role in metalloenzyme catalysis and modern cross-coupling reactions. Radicals, being nonpolar and neutral, exhibit orthogonal reactivity to nucleophilic and basic functional groups commonly present in biomolecules. Harnessing this compatibility, we delve into the application of nickel-catalyzed radical pathways in the synthesis of noncanonical peptides and carbohydrates, critical for chemical biology studies and drug discovery.We previously characterized a sequential reduction mechanism that accounts for chemoselectivity in cross-electrophile coupling reactions. This catalytic cycle begins with nickel(I)-mediated radical generation from alkyl halides, followed by carbon radical capture by nickel(II) complexes, and concludes with reductive elimination. These steps resonate with mechanistic proposals in nickel-catalyzed cross-coupling, photoredox, and electrocatalytic reactions. Herein, we present our insights into each step involving radicals, including initiation, propagation, termination, and the nuances of kinetics, origins of selectivity, and ligand effects.Radical generation from C(sp3) electrophiles via one-electron oxidative addition with low-valent nickel radical intermediates provides the basis for stereoconvergent and cross-electrophile couplings. Our electroanalytical studies elucidate a concerted halogen atom abstraction mechanism, where electron transfer is coupled with halide dissociation. Using this pathway, we have developed a nickel-catalyzed stereoselective radical addition to dehydroalanine, facilitating the synthesis of noncanonical peptides. In this application, chiral ligands modulate the stereochemical outcome through the asymmetric protonation of a nickel-enolate intermediate.The capture of the alkyl radical by nickel(II) expands the scope of cross-coupling, promotes reductive elimination through the formation of high-valent nickel(III) species, and governs chemo- and stereoselectivity. We discovered that nickel(II)-aryl efficiently traps radicals with a barrier ranging from 7 to 9 kcal/mol, followed by fast reductive elimination. In contrast, nickel(II)-alkyl captures radicals to form a nickel(III) species, which was characterized by EPR spectroscopy. However, the subsequent slow reductive elimination resulted in minimal product formation. The observed high diastereoselectivity of radical capture inspired investigations into C-aryl and C-acyl glycosylation reactions. We developed a redox auxiliary that readily couples with natural carbohydrates and produces glycosyl radicals upon photoredox activation. Nickel-catalyzed cross-coupling of the glycosyl radical with bromoarenes and carboxylic acids leads to diverse non-natural glycosides that can facilitate drug discovery.Stoichiometric studies on well-defined d8-nickel complexes have showcased means to promote reductive elimination, including ligand association, oxidation, and oxidative addition.In the final section, we address the influence of auxiliary ligands on the electronic structure and redox activity of organonickel intermediates. Synthesis of a series of low-valent nickel radical complexes and characterization of their electronic structures led us to a postulate that ligand redox activity correlates with coordination geometry. Our data reveal that a change in ligand redox activity can shift the redox potentials of reaction intermediates, potentially altering the mechanism of catalytic reactions. Moreover, coordinating additives and solvents may stabilize nickel radicals during catalysis by adjusting ligand redox activity, which is consistent with known catalytic conditions.
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Affiliation(s)
- Gregory
A. Dawson
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Ethan H. Spielvogel
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Tianning Diao
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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4
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Dawson G, Lin Q, Neary MC, Diao T. Ligand Redox Activity of Organonickel Radical Complexes Governed by the Geometry. J Am Chem Soc 2023; 145:20551-20561. [PMID: 37695362 PMCID: PMC10515493 DOI: 10.1021/jacs.3c07031] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Indexed: 09/12/2023]
Abstract
Nickel-catalyzed cross-coupling reactions often employ bidentate π-acceptor N-ligands to facilitate radical pathways. This report presents the synthesis and characterization of a series of organonickel radical complexes supported by bidentate N-ligands, including bpy, phen, and pyrox, which are commonly proposed and observed intermediates in catalytic reactions. Through a comparison of relevant analogues, we have established an empirical rule governing the electronic structures of these nickel radical complexes. The N-ligands exhibit redox activity in four-coordinate, square-planar nickel radical complexes, leading to the observation of ligand-centered radicals. In contrast, these ligands do not display redox activity when supporting three-coordinate, trigonal planar nickel radical complexes, which are better described as nickel-centered radicals. This trend holds true irrespective of the nature of the actor ligands. These results provide insights into the beneficial effect of coordinating salt additives and solvents in stabilizing nickel radical intermediates during catalytic reactions by modulating the redox activity of the ligands. Understanding the electronic structures of these active intermediates can contribute to the development and optimization of nickel catalysts for cross-coupling reactions.
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Affiliation(s)
- Gregory
A. Dawson
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Qiao Lin
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Michelle C. Neary
- Department
of Chemistry, CUNY − Hunter College, 695 Park Avenue, New York, New York 10065, United States
| | - Tianning Diao
- Department
of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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5
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Zhang L, Wang X, Pu M, Chen C, Yang P, Wu YD, Chi YR, Zhou JS. Nickel-Catalyzed Enantioselective Reductive Arylation and Heteroarylation of Aldimines via an Elementary 1,4-Addition. J Am Chem Soc 2023. [PMID: 37023358 DOI: 10.1021/jacs.3c00548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Abstract
Nickel catalysts of chiral pyrox ligands promoted enantioselective reductive arylation and heteroarylation of aldimines, using directly (hetero)aryl halides and sulfonates. The catalytic arylation can also be conducted with crude aldimines generated from condensation of aldehydes and azaaryl amines. Mechanistically, density functional theory (DFT) calculations and experiments pointed to an elementary step of 1,4-addition of aryl nickel(I) complexes to N-azaaryl aldimines.
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Affiliation(s)
- Luoqiang Zhang
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Room F312, 2199 Lishui Road, Nanshan District, Shenzhen 518055, China
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Xiuhua Wang
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Room F312, 2199 Lishui Road, Nanshan District, Shenzhen 518055, China
| | - Maoping Pu
- Shenzhen Bay Laboratory, Gaoke Innovation Center, Guangqiao Road, Guangming District, Shenzhen 518107, China
| | - Caiyou Chen
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Peng Yang
- College of Chemistry, Chemical Engineering and Materials Science, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Institutes of Biomedical Sciences, Shandong Normal University, Jinan 250014, China
| | - Yun-Dong Wu
- Shenzhen Bay Laboratory, Gaoke Innovation Center, Guangqiao Road, Guangming District, Shenzhen 518107, China
- Lab of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yonggui Robin Chi
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, 637371 Singapore
| | - Jianrong Steve Zhou
- State Key Laboratory of Chemical Oncogenomics, Guangdong Provincial Key Laboratory of Chemical Genomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Room F312, 2199 Lishui Road, Nanshan District, Shenzhen 518055, China
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6
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Gafurov ZN, Sakhapov IF, Kagilev AA, Kantyukov AO, Mikhailov IK, Ganeev GR, Faizullin RR, Khayarov KR, Gerasimov AV, Yakhvarov DG. SYNTHESIS, STRUCTURE, AND PROPERTIES OF THE ORGANONICKEL σ-COMPLEX [NiBr(Pmp)(bpy)], WHERE Pmp IS 2,3,4,5,6- PENTAMETHYLPHENYL, bpy IS 2,2′-BIPYRIDINE. J STRUCT CHEM+ 2023. [DOI: 10.1134/s0022476623010080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
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7
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Le Vaillant F, Mateos Calbet A, González-Pelayo S, Reijerse EJ, Ni S, Busch J, Cornella J. Catalytic synthesis of phenols with nitrous oxide. Nature 2022; 604:677-683. [PMID: 35478236 PMCID: PMC9046086 DOI: 10.1038/s41586-022-04516-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Accepted: 02/04/2022] [Indexed: 02/01/2023]
Abstract
The development of catalytic chemical processes that enable the revalorization of nitrous oxide (N2O) is an attractive strategy to alleviate the environmental threat posed by its emissions1–6. Traditionally, N2O has been considered an inert molecule, intractable for organic chemists as an oxidant or O-atom transfer reagent, owing to the harsh conditions required for its activation (>150 °C, 50‒200 bar)7–11. Here we report an insertion of N2O into a Ni‒C bond under mild conditions (room temperature, 1.5–2 bar N2O), thus delivering valuable phenols and releasing benign N2. This fundamentally distinct organometallic C‒O bond-forming step differs from the current strategies based on reductive elimination and enables an alternative catalytic approach for the conversion of aryl halides to phenols. The process was rendered catalytic by means of a bipyridine-based ligands for the Ni centre. The method is robust, mild and highly selective, able to accommodate base-sensitive functionalities as well as permitting phenol synthesis from densely functionalized aryl halides. Although this protocol does not provide a solution to the mitigation of N2O emissions, it represents a reactivity blueprint for the mild revalorization of abundant N2O as an O source. A study demonstrates that nitrous oxide can act as the source of O in a catalytic conversion of aryl halides to phenols, releasing N2 as by-product.
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Affiliation(s)
| | - Ana Mateos Calbet
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
| | | | - Edward J Reijerse
- Max-Planck-Institut für Chemische Energiekonversion, Mülheim an der Ruhr, Germany
| | - Shengyang Ni
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
| | - Julia Busch
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany
| | - Josep Cornella
- Max-Planck-Institut für Kohlenforschung, Mülheim an der Ruhr, Germany.
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8
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Ju L, Lin Q, LiBretto NJ, Wagner CL, Hu CT, Miller JT, Diao T. Reactivity of (bi-Oxazoline)organonickel Complexes and Revision of a Catalytic Mechanism. J Am Chem Soc 2021; 143:14458-14463. [PMID: 34463481 DOI: 10.1021/jacs.1c07139] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Bi-Oxazoline (biOx) has emerged as an effective ligand framework for promoting nickel-catalyzed cross-coupling, cross-electrophile coupling, and photoredox-nickel dual catalytic reactions. This report fills the knowledge gap of the organometallic reactivity of (biOx)Ni complexes, including catalyst reduction, oxidative electrophile activation, radical capture, and reductive elimination. The biOx ligand displays no redox activity in (biOx)Ni(I) complexes, in contrast to other chelating imine and oxazoline ligands. The lack of ligand redox activity results in more negative reduction potentials of (biOx)Ni(II) complexes and accounts for the inability of zinc and manganese to reduce (biOx)Ni(II) species. On the basis of these results, we revise the formerly proposed "sequential reduction" mechanism of a (biOx)Ni-catalyzed cross-electrophile coupling reaction by excluding catalyst reduction steps.
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Affiliation(s)
- Luchuan Ju
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Qiao Lin
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Nicole J LiBretto
- Department of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47906, United States
| | - Clifton L Wagner
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Chunhua Tony Hu
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Jeffrey T Miller
- Department of Chemical Engineering, Purdue University, 480 Stadium Mall Drive, West Lafayette, Indiana 47906, United States
| | - Tianning Diao
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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9
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Lin Q, Fu Y, Liu P, Diao T. Monovalent Nickel-Mediated Radical Formation: A Concerted Halogen-Atom Dissociation Pathway Determined by Electroanalytical Studies. J Am Chem Soc 2021; 143:14196-14206. [PMID: 34432468 DOI: 10.1021/jacs.1c05255] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The recent success of nickel catalysts in stereoconvergent cross-coupling and cross-electrophile coupling reactions partly stems from the ability of monovalent nickel species to activate C(sp3) electrophiles and generate radical intermediates. This electroanalytical study of the commonly applied (bpy)Ni catalyst elucidates the mechanism of this critical step. Data rule out outer-sphere electron transfer and two-electron oxidative addition pathways. The linear free energy relationship between rates and the bond-dissociation free energies, the electronic and steric effects of the nickel complexes and the electrophiles, and DFT calculations support a variant of the halogen-atom abstraction pathway, the inner-sphere electron transfer concerted with halogen-atom dissociation. This mechanism accounts for the observed reactivity of different electrophiles in cross-coupling reactions and provides a mechanistic rationale for the chemoselectivity obtained in cross-electrophile coupling over homocoupling.
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Affiliation(s)
- Qiao Lin
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Yue Fu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Peng Liu
- Department of Chemistry, University of Pittsburgh, 219 Parkman Avenue, Pittsburgh, Pennsylvania 15260, United States
| | - Tianning Diao
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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10
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Abstract
AbstractNickel-catalyzed cross-coupling and photoredox catalytic reactions has found widespread utilities in organic synthesis. Redox processes are key intermediate steps in many catalytic cycles. As a result, it is pertinent to measure and document the redox potentials of various nickel species as precatalysts, catalysts, and intermediates. The redox potentials of a transition-metal complex are governed by its oxidation state, ligand, and the solvent environment. This article tabulates experimentally measured redox potentials of nickel complexes supported on common ligands under various conditions. This review article serves as a versatile tool to help synthetic organic and organometallic chemists evaluate the feasibility and kinetics of redox events occurring at the nickel center, when designing catalytic reactions and preparing nickel complexes.1 Introduction1.1 Scope1.2 Measurement of Formal Redox Potentials1.3 Redox Potentials in Nonaqueous Solution2 Redox Potentials of Nickel Complexes2.1 Redox Potentials of (Phosphine)Ni Complexes2.2 Redox Potentials of (Nitrogen)Ni Complexes2.3 Redox Potentials of (NHC)Ni Complexes
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11
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Gafurov ZN, Kagilev AA, Kantyukov AO, Sinyashin OG, Yakhvarov DG. The role of organonickel reagents in organophosphorus chemistry. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213889] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Eskelinen T, Buss S, Petrovskii SK, Grachova EV, Krause M, Kletsch L, Klein A, Strassert CA, Koshevoy IO, Hirva P. Photophysics and Excited State Dynamics of Cyclometalated [M(Phbpy)(CN)] (M = Ni, Pd, Pt) Complexes: A Theoretical and Experimental Study. Inorg Chem 2021; 60:8777-8789. [PMID: 34097403 DOI: 10.1021/acs.inorgchem.1c00680] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cyclometalated complexes [M(Phbpy)(CN)] (HPhbpy = 6-phenyl-2,2'-bipyridine) of the group 10 metals (Ni, Pd, and Pt) bearing a carbanionic -C∧N∧N pincer ligand were synthesized and studied in a combined experimental and computational DFT approach. All three complexes were crystallographically characterized showing closely packed dimers with head-to-tail stacking and short metal-metal contacts in the solid state. The computational models for geometries, excited states, and electronic transitions addressed both monomeric (Ni-mono, Pd-mono, and Pt-mono) and dimeric (Ni-dim, Pd-dim, and Pt-dim) entities. Photophysical properties and excited state dynamics of all title complexes were investigated in solution and in the solid at 298 and 77 K. [Ni(Phbpy)(CN)] and [Pd(Phbpy)(CN)] are virtually nonemissive in solution at 298 K, whereas [Pt(Phbpy)(CN)] shows phosphorescence in CH2Cl2 (DCM) solution (λem = 562 nm) stemming from a mixed 3MLCT/ILCT (metal-to-ligand charge transfer/intraligand charge transfer) state. At 77 K in a glassy frozen DCM:MeOH matrix, [Pd(Phbpy)(CN)] shows a remarkable emission (λem = 571 nm) with a photoluminescence quantum yield reaching almost unity, whereas [Ni(Phbpy)(CN)] is again nonemissive. Calculations on the monomeric models M-mono show that low-lying metal-centered states (MC, i.e., d-d* configuration) with dissociative character quench the photoluminescence. In the solid state, the complexes [M(Phbpy)(CN)] show defined photoluminescence bands (λem = 561 nm for Pd and 701 nm for Pt). Calculations on the dimeric models M-dim shows that the axial M···M interactions alter the photophysical properties of Pd-dim and Pt-dim toward MMLCT (metal-metal-to-ligand charge transfer) excited states with Pd-dim showing temperature-dependent emission lifetimes, suggesting thermally activated delayed fluorescence, whereas Pt-dim displayed phosphorescence with excimeric character. The metal-metal interactions were analyzed in detail with the quantum theory of atoms in molecules approach.
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Affiliation(s)
- Toni Eskelinen
- Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80100 Joensuu, Finland
| | - Stefan Buss
- CeNTech, CiMIC, SoN, Westfälische Wilhelms-Universität Münster, Heisenbergstr. 11, D-48149 Münster, Germany
| | - Stanislav K Petrovskii
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia
| | - Elena V Grachova
- Department of Chemistry, St. Petersburg State University, Universitetskii pr. 26, 198504 St. Petersburg, Russia
| | - Maren Krause
- Department of Chemistry, University of Cologne, D-50939 Cologne, Germany
| | - Lukas Kletsch
- Department of Chemistry, University of Cologne, D-50939 Cologne, Germany
| | - Axel Klein
- Department of Chemistry, University of Cologne, D-50939 Cologne, Germany
| | - Cristian A Strassert
- Institut für Anorganische und Analytische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstr. 28/30, D-48149 Münster, Germany.,CeNTech, CiMIC, SoN, Westfälische Wilhelms-Universität Münster, Heisenbergstr. 11, D-48149 Münster, Germany
| | - Igor O Koshevoy
- Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80100 Joensuu, Finland
| | - Pipsa Hirva
- Department of Chemistry, University of Eastern Finland, P.O. Box 111, FI-80100 Joensuu, Finland
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13
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Vogt N, Sandleben A, Kletsch L, Schäfer S, Chin MT, Vicic DA, Hörner G, Klein A. Role of the X Coligands in Cyclometalated [Ni(Phbpy)X] Complexes (HPhbpy = 6-Phenyl-2,2′-bipyridine). Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00237] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicolas Vogt
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
| | - Aaron Sandleben
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
| | - Lukas Kletsch
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
| | - Sascha Schäfer
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
| | - Mason T. Chin
- Department of Chemistry, Lehigh University, 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - David A. Vicic
- Department of Chemistry, Lehigh University, 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - Gerald Hörner
- Institut für Chemie, Anorganische Chemie IV, Universität Bayreuth, Universitätsstraße 30, D-95440 Bayreuth, Germany
| | - Axel Klein
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, D-50939 Köln, Germany
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14
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Wagner CL, Herrera G, Lin Q, Hu CT, Diao T. Redox Activity of Pyridine-Oxazoline Ligands in the Stabilization of Low-Valent Organonickel Radical Complexes. J Am Chem Soc 2021; 143:5295-5300. [PMID: 33792294 PMCID: PMC8851433 DOI: 10.1021/jacs.1c00440] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Low-valent organonickel radical complexes are common intermediates in cross-coupling reactions and metalloenzyme-mediated processes. The electronic structures of N-ligand supported nickel complexes appear to vary depending on the actor ligands and the coordination number. The reduction products of a series of divalent (pyrox)Ni complexes establish the redox activity of pyrox in stabilizing electron-rich Ni(II)-alkyl and -aryl complexes by adopting a ligand-centered radical configuration. The reduced pyrox imparts an enhanced trans-influence. In contrast, such redox activity was not observed in a (pyrox)Ni(I)-bromide species. The excellent capability of pyrox in stabilizing electron-rich Ni species resonates with its proclivity in promoting the reductive activation of C(sp3) electrophiles in cross-coupling reactions.
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Affiliation(s)
- Clifton L Wagner
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Gabriel Herrera
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Qiao Lin
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Chunhua T Hu
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Tianning Diao
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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15
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Bryden MA, Zysman-Colman E. Organic thermally activated delayed fluorescence (TADF) compounds used in photocatalysis. Chem Soc Rev 2021; 50:7587-7680. [PMID: 34002736 DOI: 10.1039/d1cs00198a] [Citation(s) in RCA: 151] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Organic compounds that show Thermally Activated Delayed Fluorescence (TADF) have become wildly popular as next-generation emitters in organic light emitting diodes (OLEDs). Since 2016, a subset of these have found increasing use as photocatalysts. This review comprehensively highlights their potential by documenting the diversity of the reactions where an organic TADF photocatalyst can be used in lieu of a noble metal complex photocatalyst. Beyond the small number of TADF photocatalysts that have been used to date, the analysis conducted within this review reveals the wider potential of organic donor-acceptor TADF compounds as photocatalysts. A discussion of the benefits of compounds showing TADF for photocatalysis is presented, which paints a picture of a very promising future for organic photocatalyst development.
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Affiliation(s)
- Megan Amy Bryden
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK.
| | - Eli Zysman-Colman
- Organic Semiconductor Centre, EaStCHEM School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK.
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16
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Reyes-Mata CA, Castillo I. Calix[8]arene-based Ni(II) complexes for electrocatalytic CO2 reduction. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2020.119607] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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17
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Lin Q, Diao T. Mechanism of Ni-Catalyzed Reductive 1,2-Dicarbofunctionalization of Alkenes. J Am Chem Soc 2019; 141:17937-17948. [DOI: 10.1021/jacs.9b10026] [Citation(s) in RCA: 125] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Qiao Lin
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
| | - Tianning Diao
- Department of Chemistry, New York University, 100 Washington Square East, New York, New York 10003, United States
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18
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Matsubara K, Fujii T, Hosokawa R, Inatomi T, Yamada Y, Koga Y. Fluorine-Substituted Arylphosphine for an NHC-Ni(I) System, Air-Stable in a Solid State but Catalytically Active in Solution. Molecules 2019; 24:E3222. [PMID: 31487944 PMCID: PMC6766797 DOI: 10.3390/molecules24183222] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 11/16/2022] Open
Abstract
Monovalent NHC-nickel complexes bearing triarylphosphine, in which fluorine is incorporated onto the aryl groups, have been synthesized. Tris(3,5-di(trifluoromethyl)-phenyl)phosphine efficiently gave a monovalent nickel bromide complex, whose structure was determined by X-ray diffraction analysis for the first time. In the solid state, the Ni(I) complex was less susceptible to oxidation in air than the triphenylphosphine complex, indicating greatly improved solid-state stability. In contrast, the Ni(I) complex in solution can easily liberate the phosphine, high catalytic activity toward the Kumada-Tamao-Corriu coupling of aryl bromides.
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Affiliation(s)
- Kouki Matsubara
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan.
| | - Takahiro Fujii
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan.
| | - Rion Hosokawa
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan.
| | - Takahiro Inatomi
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan
| | - Yuji Yamada
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan
| | - Yuji Koga
- Department of Chemistry, Fukuoka University, 8-19-1 Nanakuma, Fukuoka 814-0180, Japan
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19
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Zarate C, Yang H, Bezdek MJ, Hesk D, Chirik PJ. Ni(I)–X Complexes Bearing a Bulky α-Diimine Ligand: Synthesis, Structure, and Superior Catalytic Performance in the Hydrogen Isotope Exchange in Pharmaceuticals. J Am Chem Soc 2019; 141:5034-5044. [DOI: 10.1021/jacs.9b00939] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Cayetana Zarate
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Haifeng Yang
- MRL, Merck & Co, Inc., Rahway, New Jersey 07065, United States
| | - Máté J. Bezdek
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - David Hesk
- MRL, Merck & Co, Inc., Rahway, New Jersey 07065, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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20
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Garcia KJ, Gilbert MM, Weix DJ. Nickel-Catalyzed Addition of Aryl Bromides to Aldehydes To Form Hindered Secondary Alcohols. J Am Chem Soc 2019; 141:1823-1827. [PMID: 30693771 PMCID: PMC6368192 DOI: 10.1021/jacs.8b13709] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
![]()
Transition-metal-catalyzed
addition of aryl halides across carbonyls
remains poorly developed, especially for aliphatic aldehydes and hindered
substrate combinations. We report here that simple nickel complexes
of bipyridine and PyBox can catalyze the addition of aryl halides
to both aromatic and aliphatic aldehydes using zinc metal as the reducing
agent. This convenient approach tolerates acidic functional groups
that are not compatible with Grignard reactions, yet sterically hindered
substrates still couple in high yield (33 examples, 70% average yield).
Mechanistic studies show that an arylnickel, and not an arylzinc,
adds efficiently to cyclohexanecarboxaldehyde, but only in the
presence of a Lewis acid co-catalyst (ZnBr2).
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Affiliation(s)
- Kevin J Garcia
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Michael M Gilbert
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
| | - Daniel J Weix
- Department of Chemistry , University of Wisconsin-Madison , Madison , Wisconsin 53706 , United States
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21
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Inatomi T, Fukahori Y, Yamada Y, Ishikawa R, Kanegawa S, Koga Y, Matsubara K. Ni(i)–Ni(iii) cycle in Buchwald–Hartwig amination of aryl bromide mediated by NHC-ligated Ni(i) complexes. Catal Sci Technol 2019. [DOI: 10.1039/c8cy02427h] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
NHC-ligated Ni(i) intermediates in Buchwald–Hartwig amination of aryl halides were isolated and determined. The presence of a Ni(iii) intermediate was also indicated at low temperature.
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Affiliation(s)
| | - Yukino Fukahori
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Yuji Yamada
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Ryuta Ishikawa
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Shinji Kanegawa
- Institute for Advanced Materials Chemistry and Engineering
- Kyushu University
- Fukuoka 819-0395
- Japan
| | - Yuji Koga
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
| | - Kouki Matsubara
- Department of Chemistry
- Fukuoka University
- Fukuoka 814-0180
- Japan
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22
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Shen Y, Gu Y, Martin R. sp 3 C-H Arylation and Alkylation Enabled by the Synergy of Triplet Excited Ketones and Nickel Catalysts. J Am Chem Soc 2018; 140:12200-12209. [PMID: 30184423 DOI: 10.1021/jacs.8b07405] [Citation(s) in RCA: 229] [Impact Index Per Article: 38.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Triplet ketone sensitizers are of central importance within the realm of photochemical transformations. Although the radical-type character of triplet excited states of diaryl ketones suggests the viability for triggering hydrogen-atom transfer (HAT) and single-electron transfer (SET) processes, among others, their use as multifaceted catalysts in C-C bond-formation via sp3 C-H functionalization of alkane feedstocks still remains rather unexplored. Herein, we unlock a modular photochemical platform for forging C( sp3)-C( sp2) and C( sp3)-C( sp3) linkages from abundant alkane sp3 C-H bonds as functional handles using the synergy between nickel catalysts and simple, cheap and modular diaryl ketones. This method is distinguished by its wide scope that is obtained from cheap catalysts and starting precursors, thus complementing existing inner-sphere C-H functionalization protocols or recent photoredox scenarios based on iridium polypyridyl complexes. Additionally, such a platform provides a new strategy for streamlining the synthesis of complex molecules with high levels of predictable site-selectivity and preparative utility. Mechanistic experiments suggest that sp3 C-H abstraction occurs via HAT from the ketone triplet excited state. We believe this study will contribute to a more systematic utilization of triplet excited ketones as catalysts in metallaphotoredox scenarios.
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Affiliation(s)
- Yangyang Shen
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Yiting Gu
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,Departament de Química Analítica i Química Orgànica , Universitat Rovira i Virgili , c/Marcel·lí Domingo 1 , 43007 Tarragona , Spain
| | - Ruben Martin
- Institute of Chemical Research of Catalonia (ICIQ) , The Barcelona Institute of Science and Technology , Av. Països Catalans 16 , 43007 Tarragona , Spain.,ICREA , Passeig Lluïs Companys 23 , 08010 Barcelona , Spain
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23
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Sandleben A, Vogt N, Hörner G, Klein A. Redox Series of Cyclometalated Nickel Complexes [Ni((R)Ph(R′)bpy)Br]+/0/–/2– (H–(R)Ph(R′)bpy = Substituted 6-Phenyl-2,2′-bipyridine). Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00559] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Aaron Sandleben
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie, Greinstraße 6, D-50939 Köln, Germany
| | - Nicolas Vogt
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie, Greinstraße 6, D-50939 Köln, Germany
| | - Gerald Hörner
- Institut für Chemie, Theoretische Chemie, Technische Universität Berlin, Straße des 17, Juni 135, D-10623 Berlin, Germany
| | - Axel Klein
- Universität zu Köln, Department für Chemie, Institut für Anorganische Chemie, Greinstraße 6, D-50939 Köln, Germany
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24
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Jongbloed LS, Vogt N, Sandleben A, de Bruin B, Klein A, van der Vlugt JI. Nickel-Alkyl Complexes with a Reactive PNC-Pincer Ligand. Eur J Inorg Chem 2018; 2018:2408-2418. [PMID: 29937691 PMCID: PMC6001697 DOI: 10.1002/ejic.201800168] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Indexed: 11/26/2022]
Abstract
Based on previous work related to the design and application of rigid tridentate phosphine-pyridine-phenyl coordination offered by a PNC-pincer ligand upon cyclometalation to nickel, the synthesis, spectroscopic and solid state characterization and redox-reactivity of two NiII(PNC) complexes featuring either a methyl (2CH3 ) or CF3 co-ligand (2CF3 ) are described. One-electron oxidation is proposed to furnish C-C reductive elimination, as deduced from a combined chemical, electrochemical, spectroscopic and computational study. One-electron reduction results in a ligand-centered radical anion, as supported by electrochemistry, UV spectroelectrochemistry, EPR spectroscopy, and DFT calculations. This further attenuates the breadth of chemical reactivity offered by such PNC-pincer ligands.
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Affiliation(s)
- Linda S. Jongbloed
- Homogeneous, Bioinspired and Supramolecular Catalysis, van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Nicolas Vogt
- Department für ChemieInstitut für Anorganische ChemieUniversität zu KölnGreinstraße 650939KölnGermany
| | - Aaron Sandleben
- Department für ChemieInstitut für Anorganische ChemieUniversität zu KölnGreinstraße 650939KölnGermany
| | - Bas de Bruin
- Homogeneous, Bioinspired and Supramolecular Catalysis, van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Axel Klein
- Department für ChemieInstitut für Anorganische ChemieUniversität zu KölnGreinstraße 650939KölnGermany
| | - Jarl Ivar van der Vlugt
- Homogeneous, Bioinspired and Supramolecular Catalysis, van ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
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25
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Meng QY, Wang S, Huff GS, König B. Ligand-Controlled Regioselective Hydrocarboxylation of Styrenes with CO2 by Combining Visible Light and Nickel Catalysis. J Am Chem Soc 2018; 140:3198-3201. [DOI: 10.1021/jacs.7b13448] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Qing-Yuan Meng
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
| | - Shun Wang
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
| | - Gregory S. Huff
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
| | - Burkhard König
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, D-93040 Regensburg, Germany
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26
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Jacquet J, Cheaib K, Ren Y, Vezin H, Orio M, Blanchard S, Fensterbank L, Desage-El Murr M. Circumventing Intrinsic Metal Reactivity: Radical Generation with Redox-Active Ligands. Chemistry 2017; 23:15030-15034. [PMID: 28873243 DOI: 10.1002/chem.201704049] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Indexed: 01/09/2023]
Abstract
Nickel complexes have gained sustained attention as efficient catalysts in cross-coupling reactions and co-catalysts in dual systems due to their ability to react with radical species. Central to this reactivity is nickel's propensity to shuttle through several accessible redox states from Ni0 to NiIV . Here, we report the catalytic generation of trifluoromethyl radicals from a nickel complex bearing redox-active iminosemiquinone ligands. This unprecedented reactivity is enabled through ligand-based oxidation performing electron transfer to an electrophilic CF3+ source while the nickel oxidation state is preserved. Additionally, extension of this reactivity to a copper complex bearing a single redox equivalent is reported, thus providing a unified reactivity scheme. These results open new pathways in radical chemistry with redox-active ligands.
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Affiliation(s)
- Jérémy Jacquet
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Khaled Cheaib
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Yufeng Ren
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Hervé Vezin
- Laboratoire de Spectrochimie Infrarouge et Raman, Université des Sciences et Technologies de Lille, UMR CNRS 8516, 59655 Villeneuve d'Ascq Cedex, France
| | - Maylis Orio
- Aix Marseille Université, CNRS, Centrale Marseille iSm2 UMR 7313, 13397, Marseille cedex 20, France
| | - Sébastien Blanchard
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France
| | - Marine Desage-El Murr
- Sorbonne Universités, UPMC, Université Paris 06, UMR CNRS 8232, Institut Parisien de Chimie Moléculaire, France.,Institut de Chimie, Université de Strasbourg, 1 rue Blaise Pascal, 67000, Strasbourg, France
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27
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Meng QY, Wang S, König B. Carboxylation of Aromatic and Aliphatic Bromides and Triflates with CO2
by Dual Visible-Light-Nickel Catalysis. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706724] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Qing-Yuan Meng
- Institute of Organic Chemistry; Faculty of Chemistry and Pharmacy; University of Regensburg; 93040 Regensburg Germany
| | - Shun Wang
- Institute of Organic Chemistry; Faculty of Chemistry and Pharmacy; University of Regensburg; 93040 Regensburg Germany
| | - Burkhard König
- Institute of Organic Chemistry; Faculty of Chemistry and Pharmacy; University of Regensburg; 93040 Regensburg Germany
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28
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Meng QY, Wang S, König B. Carboxylation of Aromatic and Aliphatic Bromides and Triflates with CO 2 by Dual Visible-Light-Nickel Catalysis. Angew Chem Int Ed Engl 2017; 56:13426-13430. [PMID: 28834097 DOI: 10.1002/anie.201706724] [Citation(s) in RCA: 148] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Indexed: 11/09/2022]
Abstract
We report the efficient carboxylation of bromides and triflates with K2 CO3 as the source of CO2 in the presence of an organic photocatalyst in combination with a nickel complex under visible light irradiation at room temperature. The reaction is compatible with a variety of functional groups and has been successfully applied to the synthesis and derivatization of biologically active molecules. In particular, the carboxylation of unactivated cyclic alkyl bromides proceeded well with our protocol, thus extending the scope of this transformation. Spectroscopic and spectroelectrochemical investigations indicated the generation of a Ni0 species as a catalytic reactive intermediate.
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Affiliation(s)
- Qing-Yuan Meng
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040, Regensburg, Germany
| | - Shun Wang
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040, Regensburg, Germany
| | - Burkhard König
- Institute of Organic Chemistry, Faculty of Chemistry and Pharmacy, University of Regensburg, 93040, Regensburg, Germany
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29
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Manzoor A, Wienefeld P, Baird MC, Budzelaar PHM. Catalysis of Cross-Coupling and Homocoupling Reactions of Aryl Halides Utilizing Ni(0), Ni(I), and Ni(II) Precursors; Ni(0) Compounds as the Probable Catalytic Species but Ni(I) Compounds as Intermediates and Products. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00446] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Adeela Manzoor
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Patrick Wienefeld
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Michael C. Baird
- Department of Chemistry, Queen’s University, Kingston, Ontario K7L 3N6, Canada
| | - Peter H. M. Budzelaar
- Department of Chemical Sciences, Federico II University of Naples, Napoli 80126, Italy
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30
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Abstract
AbstractThe new efficient and environmentally safe methods for preparation of various classes of organic and organoelement compounds, including organonickel sigma-complexes and organophosphorus compounds bearing P–C bonds have been created using the electrochemical methods. The synthetic application of the elaborated techniques towards the process of formation of new carbon-carbon, carbon-metal and carbon-phosphorus bonds are discussed. The mechanisms of the proposed processes and the nature of the formed in the overall electrochemical process intermediates are disclosed. The elaborated methods operated in the principals of “green chemistry” can be considered as an efficient alternative to some classical methods for preparation of active catalysts, biologically active molecules and new polynuclear complexes displaying practically useful properties.
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31
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Ning X, Lu Y, Fu H, Wan H, Xu Z, Zheng S. Template-Mediated Ni(II) Dispersion in Mesoporous SiO 2 for Preparation of Highly Dispersed Ni Catalysts: Influence of Template Type. ACS APPLIED MATERIALS & INTERFACES 2017; 9:19335-19344. [PMID: 28498654 DOI: 10.1021/acsami.7b04100] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Supported Ni catalysts on three mesoporous SiO2 supports (i.e., SBA-15, MCM-41, and HMS) were prepared using a solid-state reaction between Ni(NO3)2 and organic template-occluded mesoporous SiO2. For comparison, supported Ni catalysts on mesoporous SiO2 synthesized by the conventional impregnation method were also included. The catalysts were characterized by scanning electron microscopy, X-ray diffraction, UV-vis diffuse reflectance spectroscopy, N2 adsorption, X-ray photoelectron spectroscopy, H2 temperature-programmed reduction, transmission electron microscopy, and transmission electron microscopy-energy-dispersive X-ray. The catalytic properties of the catalysts were evaluated using gas-phase catalytic hydrodechlorination of 1,2-dichloroethane. The results showed that upon grinding Ni(NO3)2 with template-occluded mesoporous SiO2, strong coordination between Ni2+ and dodecylamine was identified in the Ni(NO3)2-HMS system. Additionally, the results of H2 temperature-programmed reduction revealed that NiO in calcined NiO/HMS was reduced at higher temperature than those in calcined NiO/SBA-15 and NiO/MCM-41, reflecting the presence of a strong interaction between NiO and mesoporous SiO2 in NiO/HMS. Consistently, the average particle sizes of metallic Ni were found to be 2.7, 3.4, and 9.6 nm in H2-reduced Ni/HMS, Ni/SBA-15, and Ni/MCM-41, respectively, indicative of a much higher Ni dispersion in Ni/HMS. For the catalytic hydrodechlorination of 1,2-dichloroethane, Ni/MCM-41 synthesized by the solid-state reaction method exhibited a catalytic activity similar to that prepared by the impregnation method, while higher catalytic activities were observed on Ni/HMS and Ni/SBA-15 than on their counterparts prepared by the impregnation method. Furthermore, a higher conversion was identified on Ni/HMS than on Ni/SBA-15 and Ni/MCM-41, highlighting the importance of template type for the preparation of highly dispersed metal catalysts on mesoporous SiO2.
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Affiliation(s)
- Xin Ning
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Yiyuan Lu
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Heyun Fu
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Haiqin Wan
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Zhaoyi Xu
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
| | - Shourong Zheng
- State Key Laboratory of Pollution Control and Resource Reuse, Jiangsu Key Laboratory of Vehicle Emissions Control, School of the Environment, Nanjing University , Nanjing 210023, P.R. China
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Biewer C, Hamacher C, Kaiser A, Vogt N, Sandleben A, Chin MT, Yu S, Vicic DA, Klein A. Unsymmetrical N-Aryl-1-(pyridin-2-yl)methanimine Ligands in Organonickel(II) Complexes: More Than a Blend of 2,2'-Bipyridine and N,N-Diaryl-α-diimines? Inorg Chem 2016; 55:12716-12727. [PMID: 27989202 DOI: 10.1021/acs.inorgchem.6b01874] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The new organonickel complexes [(R-PyMA)Ni(Mes)X] [R-PyMA = N-aryl-1-(pyridin-2-yl)methanimine; aryl = phenyl, 2,6-Me2-, 3,5-Me2-, 2,4,6-Me3-, 2,6-iPr2-, 3,5-(OMe)2-, 2-NO2-4-Me-, 4-NO2-, 2-CF3-, and 2-CF3-6-F-phenyl; Mes = 2,4,6-trimethylphenyl; X = F, Cl, Br, or I] were obtained as approximate 1/1 cis and trans isomeric mixtures or pure cis isomers depending on the PyMA ligand and X. The [(R-PyMA)Ni(Mes)X] complexes with X = Br or Cl were directly synthesized from the precursors trans-[(PPh3)2Ni(Mes)X], while [(PyMA)Ni(Mes)X] derivatives with X = F or I were obtained from [(PyMA)Ni(Mes)Br] through X exchange reactions. Although density functional theory (DFT) calculations show a preference for the sterically favored cis isomers, both isomers could be observed in many cases; in three cases, even single crystals for X-ray diffraction could be obtained for the trans isomers. Possible intermediates for the isomerization were investigated by DFT calculations. All complexes were studied by multiple spectroscopic means, electrochemistry, and spectroelectrochemistry (for the reduction processes). The long-wavelength metal-to-ligand charge-transfer (MLCT) absorptions vary markedly with the R substituent of the ligand and the cathodic electrochemical potentials to a far smaller degree. Both are almost invariable upon variation of X. All of this is in line with Ni-based and π*-based lowest unoccupied molecular orbitals (LUMOs). In line with the unsymmetric character of the NPy^Nmethanimine ligand, electrochemistry and MLCT transitions seem to not correspond to the same type of π* LUMO, making these PyMA ligands more interesting than the symmetric heteroaromatic polypyridine ligands such as 2,2'-bipyridine (bpy; NPy^NPy) and N,N-diaryl-substituted aliphatic α-diimines (Nmethanimine^Nmethanimine) such as the diaza-1,3-butadienes (DAB). First attempts to use these complexes in Negishi-type cross-coupling reactions were successful.
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Affiliation(s)
- Christian Biewer
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Claudia Hamacher
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Andre Kaiser
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Nicolas Vogt
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Aaron Sandleben
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
| | - Mason T Chin
- Department of Chemistry, Lehigh University , 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - Siqi Yu
- Department of Chemistry, Lehigh University , 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - David A Vicic
- Department of Chemistry, Lehigh University , 6 East Packer Avenue, Bethlehem, Pennsylvania 18015, United States
| | - Axel Klein
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln , Greinstraße 6, D-50939 Köln, Germany
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33
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Rabeah J, Radnik J, Briois V, Maschmeyer D, Stochniol G, Peitz S, Reeker H, La Fontaine C, Brückner A. Tracing Active Sites in Supported Ni Catalysts during Butene Oligomerization by Operando Spectroscopy under Pressure. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02331] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jabor Rabeah
- Leibniz-Institut
für Katalyse e. V., an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
| | - Jörg Radnik
- Leibniz-Institut
für Katalyse e. V., an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
| | - Valérie Briois
- SOLEIL
Synchrotron, UR1-CNRS, L’Orme des Merisiers, BP48, Saint-Aubin 91192, Gif-sur Yvette, France
| | | | - Guido Stochniol
- Evonik Performance
Materials GmbH, Paul-Baumann-Str. 1, 45772 Marl, Germany
| | - Stephan Peitz
- Evonik Performance
Materials GmbH, Paul-Baumann-Str. 1, 45772 Marl, Germany
| | - Helene Reeker
- Evonik Performance
Materials GmbH, Paul-Baumann-Str. 1, 45772 Marl, Germany
| | - Camille La Fontaine
- SOLEIL
Synchrotron, UR1-CNRS, L’Orme des Merisiers, BP48, Saint-Aubin 91192, Gif-sur Yvette, France
| | - Angelika Brückner
- Leibniz-Institut
für Katalyse e. V., an der Universität Rostock, Albert-Einstein-Straße
29a, D-18059 Rostock, Germany
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34
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Jacquet J, Desage-El Murr M, Fensterbank L. Metal-Promoted Coupling Reactions Implying Ligand-Based Redox Changes. ChemCatChem 2016. [DOI: 10.1002/cctc.201600616] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jérémy Jacquet
- Sorbonne Universités, UPMC, Université Paris 06,UMR CNRS 8232, Institut Parisien de Chimie Moléculaire; France
| | - Marine Desage-El Murr
- Sorbonne Universités, UPMC, Université Paris 06,UMR CNRS 8232, Institut Parisien de Chimie Moléculaire; France
| | - Louis Fensterbank
- Sorbonne Universités, UPMC, Université Paris 06,UMR CNRS 8232, Institut Parisien de Chimie Moléculaire; France
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35
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Garner ME, Hohloch S, Maron L, Arnold J. A New Supporting Ligand in Actinide Chemistry Leads to Reactive Bis(NHC)borate-Supported Thorium Complexes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00467] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mary E. Garner
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Stephan Hohloch
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
| | - Laurent Maron
- LPCNO, Université de Toulouse, INSA Toulouse, 135 Avenue
de Rangueil, 31077 Toulouse, France
| | - John Arnold
- Department
of Chemistry, University of California, Berkeley, California 94720, United States
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36
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Zhang P, Le C“C, MacMillan DWC. Silyl Radical Activation of Alkyl Halides in Metallaphotoredox Catalysis: A Unique Pathway for Cross-Electrophile Coupling. J Am Chem Soc 2016; 138:8084-7. [PMID: 27263662 PMCID: PMC5103281 DOI: 10.1021/jacs.6b04818] [Citation(s) in RCA: 404] [Impact Index Per Article: 50.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
A strategy for cross-electrophile coupling has been developed via the merger of photoredox and transition metal catalysis. In this report, we demonstrate the use of commercially available tris(trimethylsilyl)silane with metallaphotoredox catalysis to efficiently couple alkyl bromides with aryl or heteroaryl bromides in excellent yields. We hypothesize that a photocatalytically generated silyl radical species can perform halogen-atom abstraction to activate alkyl halides as nucleophilic cross-coupling partners. This protocol allows the use of mild yet robust conditions to construct Csp(3)-Csp(2) bonds generically via a unique cross-coupling pathway.
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Affiliation(s)
- Patricia Zhang
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - Chi “Chip” Le
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
| | - David W. C. MacMillan
- Merck Center for Catalysis at Princeton University, Princeton, New Jersey 08544, United States
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37
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Yu S, Dudkina Y, Wang H, Kholin KV, Kadirov MK, Budnikova YH, Vicic DA. Accessing perfluoroalkyl nickel(II), (III), and (IV) complexes bearing a readily attached [C4F8] ligand. Dalton Trans 2016; 44:19443-6. [PMID: 26072704 DOI: 10.1039/c5dt01771h] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The [C4F8] ligand was shown to support well-defined terpyridyl nickel complexes in the +2 and +3 oxidation states. Notably, a cyclic voltammetry study of the nickel(iii) species indicates that an additional oxidation is accessible, providing a family of related fluoroalkyl nickel complexes spanning the +2 to +4 oxidation states.
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Affiliation(s)
- S Yu
- Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA 18015, USA.
| | - Y Dudkina
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, 8, Arbuzov Str., 420088 Kazan, Russian Federation
| | - H Wang
- Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA 18015, USA.
| | - K V Kholin
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, 8, Arbuzov Str., 420088 Kazan, Russian Federation
| | - M K Kadirov
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, 8, Arbuzov Str., 420088 Kazan, Russian Federation
| | - Y H Budnikova
- A.E. Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, 8, Arbuzov Str., 420088 Kazan, Russian Federation
| | - D A Vicic
- Department of Chemistry, Lehigh University, 6 E. Packer Ave., Bethlehem, PA 18015, USA.
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38
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Klein A, Rausch B, Kaiser A, Vogt N, Krest A. The cyclometalated nickel complex [(Phbpy)NiBr] (Phbpy− = 2,2′-bipyridine-6-phen-2-yl) – Synthesis, spectroscopic and electrochemical studies. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.10.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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39
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Yakhvarov DG, Khusnuriyalova AF, Sinyashin OG. Electrochemical Synthesis and Properties of Organonickel σ-Complexes. Organometallics 2014. [DOI: 10.1021/om500100q] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Dmitry G. Yakhvarov
- A. E. Arbuzov Institute
of Organic and Physical
Chemistry, Kazan Scientific Centre of the Russian Academy of Sciences, Arbuzov str. 8, 420088 Kazan, Russian Federation
- Kazan Federal University, Kremlyovskaya
str. 18, 420008 Kazan, Russian Federation
| | | | - Oleg G. Sinyashin
- A. E. Arbuzov Institute
of Organic and Physical
Chemistry, Kazan Scientific Centre of the Russian Academy of Sciences, Arbuzov str. 8, 420088 Kazan, Russian Federation
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40
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Yakhvarov DG, Petr A, Kataev V, Büchner B, Gómez-Ruiz S, Hey-Hawkins E, Kvashennikova SV, Ganushevich YS, Morozov VI, Sinyashin OG. Synthesis, structure and electrochemical properties of the organonickel complex [NiBr(Mes)(phen)] (Mes = 2,4,6-trimethylphenyl, phen = 1,10-phenanthroline). J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.11.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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41
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Szeto KC, Loges B, Merle N, Popoff N, Quadrelli A, Jia H, Berrier E, De Mallmann A, Delevoye L, Gauvin RM, Taoufik M. Vanadium Oxo Organometallic Species Supported on Silica for the Selective Non-oxidative Dehydrogenation of Propane. Organometallics 2013. [DOI: 10.1021/om400795s] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Kai C. Szeto
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Björn Loges
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Nicolas Merle
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Nicolas Popoff
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Alessandra Quadrelli
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Hongpeng Jia
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Elise Berrier
- Université Lille Nord de France, CNRS UMR8181, Unité de Catalyse et de Chimie du Solide, UCCS
USTL, F-59655 Villeneuve d’Ascq, France
| | - Aimery De Mallmann
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
| | - Laurent Delevoye
- Université Lille Nord de France, CNRS UMR8181, Unité de Catalyse et de Chimie du Solide, UCCS
USTL, F-59655 Villeneuve d’Ascq, France
| | - Régis M. Gauvin
- Université Lille Nord de France, CNRS UMR8181, Unité de Catalyse et de Chimie du Solide, UCCS
USTL, F-59655 Villeneuve d’Ascq, France
| | - Mostafa Taoufik
- Université Lyon 1, Institut
de Chimie Lyon, CPE Lyon, CNRS, UMR 5265 C2P2, LCOMS, 43 Bd du 11 Novembre 1918, F-69616 Villeurbanne Cedex, France
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42
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Yakhvarov DG, Gorbachuk EV, Sinyashin OG. Electrode Reactions of Elemental (White) Phosphorus and Phosphane PH3. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300845] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Klein A, Vicic DA, Biewer C, Kieltsch I, Stirnat K, Hamacher C. Oxidative Cleavage of CH3 and CF3 Radicals from BOXAM Nickel Complexes. Organometallics 2012. [DOI: 10.1021/om300342r] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Axel Klein
- Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße
6, D-50939 Köln, Germany
| | - David A. Vicic
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822,
United States
| | - Christian Biewer
- Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße
6, D-50939 Köln, Germany
| | - Iris Kieltsch
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822,
United States
| | - Kathrin Stirnat
- Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße
6, D-50939 Köln, Germany
| | - Claudia Hamacher
- Institut für Anorganische
Chemie, Universität zu Köln, Greinstraße
6, D-50939 Köln, Germany
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44
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Klein A, Biewer C, Hamacher C, Hurkes N, Perez Outeiral J, Paniagua EM, Schmieder A, Schüren AO, Burma PR, Ciszewski JT, Vicic DA. Binuclear Arylnickel Complexes with Bridging Bis(arylimino)‐1,4‐pyrazine Ligands. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101436] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Axel Klein
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Christian Biewer
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Claudia Hamacher
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Natascha Hurkes
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Jessica Perez Outeiral
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Erik Mora Paniagua
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Ann‐Kathrin Schmieder
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Andreas O. Schüren
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Prabhakara Rao Burma
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, HI 96822, USA
| | - James T. Ciszewski
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, HI 96822, USA
| | - David A. Vicic
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, HI 96822, USA
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45
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Yamaguchi Y, Ichioka H, Klein A, Brennessel WW, Vicic DA. Linear Bis(perfluoroalkyl) Complexes of Nickel Bipyridine. Organometallics 2012. [DOI: 10.1021/om2012776] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yoshitaka Yamaguchi
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822,
United States
- Department of Advanced Materials Chemistry, Graduate
School of Engineering, Yokohama National University, Tokiwadai 79-5, Hodogaya-ku, Yokohama, 240-8501, Japan
| | - Hiromi Ichioka
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822,
United States
| | - Axel Klein
- Universität zu Köln, Institut für Anorganische Chemie,
Greinstrasse 6, D-50939 Köln, Germany
| | - William W. Brennessel
- The X-ray Crystallographic Facility, Department of Chemistry, University of Rochester, Rochester, New York 14627,
United States
| | - David A. Vicic
- Department of Chemistry, University of Hawaii, 2545 McCarthy Mall, Honolulu, Hawaii 96822,
United States
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46
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Intramolecular rearrangement of the imine–amide ligand within the nickel coordination sphere affected by carbon monoxide. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2011.07.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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47
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Harnying W, Kaiser A, Klein A, Berkessel A. Cr/Ni-Catalyzed Vinylation of Aldehydes: A Mechanistic Study on the Catalytic Roles of Nickel and Chromium. Chemistry 2011; 17:4765-73. [DOI: 10.1002/chem.201003366] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2010] [Indexed: 11/12/2022]
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48
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Harding DJ, Harding P, Kivnang J, Adams H. Cationic tris(pyrazolyl)borate bipyrimidine complexes. TRANSIT METAL CHEM 2010. [DOI: 10.1007/s11243-010-9358-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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49
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Klein A, Schmieder A, Hurkes N, Hamacher C, Schüren AO, Feth MP, Bertagnolli H. Mono‐ and Binuclear Arylnickel Complexes of the α‐Diimine Bridging Ligand 2,2′‐Bipyrimidine (bpym). Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.200900945] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Axel Klein
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Ann‐Kathrin Schmieder
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Natascha Hurkes
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Claudia Hamacher
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Andreas O. Schüren
- Department für Chemie, Institut für Anorganische Chemie, Universität zu Köln, Greinstraße 6, 50939 Köln, Germany
| | - Martin P. Feth
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
| | - Helmut Bertagnolli
- Institut für Physikalische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany
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50
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Synthesis, characterization and crystal structure of a novel two-dimensional network formed by the reaction of a pyrazole ligand with nickel(II) ions. Polyhedron 2010. [DOI: 10.1016/j.poly.2009.11.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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