1
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Beagan DM, Rivera C, Szymczak NK. Appended Lewis Acids Enable Dioxygen Reactivity and Catalytic Oxidations with Ni(II). J Am Chem Soc 2024; 146:12375-12385. [PMID: 38661576 PMCID: PMC11148854 DOI: 10.1021/jacs.3c12399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
We disclose a suite of Ni(II) complexes featuring secondary sphere Lewis acids of varied Lewis acidity and tether lengths. Several of these complexes feature atypical behavior of Ni(II): reactivity with O2 that occurs only in the presence of a tethered Lewis acid. In situ UV-vis spectroscopy revealed that, although adducts are stable at -40 °C, complexes containing 9-borabicyclo[3.3.1]nonane (9-BBN) Lewis acids underwent irreversible oxidative deborylation when warmed to room temperature. We computationally and experimentally identified that oxidative instability of appended 9-BBN moieties can be mitigated using weaker Lewis acids such as pinacolborane (BPin). These insights enabled the realization of catalytic reactions: hydrogen atom abstraction from phenols and room temperature oxygen atom transfer to PPh3.
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Affiliation(s)
- Daniel M Beagan
- University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Carolina Rivera
- University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109, United States
| | - Nathaniel K Szymczak
- University of Michigan, 930 N. University Ave., Ann Arbor, Michigan 48109, United States
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2
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Deolka S, Govindarajan R, Khaskin E, Vasylevskyi S, Bahri J, Fayzullin RR, Roy MC, Khusnutdinova JR. Oxygen transfer reactivity mediated by nickel perfluoroalkyl complexes using molecular oxygen as a terminal oxidant. Chem Sci 2023; 14:7026-7035. [PMID: 37389265 PMCID: PMC10306096 DOI: 10.1039/d3sc01861j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 06/03/2023] [Indexed: 07/01/2023] Open
Abstract
Nickel perfluoroethyl and perfluoropropyl complexes supported by naphthyridine-type ligands show drastically different aerobic reactivity from their trifluoromethyl analogs resulting in facile oxygen transfer to perfluoroalkyl groups or oxygenation of external organic substrates (phosphines, sulfides, alkenes and alcohols) using O2 or air as a terminal oxidant. Such mild aerobic oxygenation occurs through the formation of spectroscopically detected transient high-valent NiIII and structurally characterized mixed-valent NiII-NiIV intermediates and radical intermediates, resembling O2 activation reported for some Pd dialkyl complexes. This reactivity is in contrast with the aerobic oxidation of naphthyridine-based Ni(CF3)2 complexes resulting in the formation of a stable NiIII product, which is attributed to the effect of greater steric congestion imposed by longer perfluoroalkyl chains.
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Affiliation(s)
- Shubham Deolka
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - R Govindarajan
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Eugene Khaskin
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Serhii Vasylevskyi
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Janet Bahri
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa 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
| | - Michael C Roy
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
| | - Julia R Khusnutdinova
- Coordination Chemistry and Catalysis Unit Okinawa Institute of Science and Technology Graduate University 1919-1 Tancha Onna-son 904-0495 Okinawa Japan
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3
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Chiu W, Nadeau BE, Patrick BO, Love JA. Investigating the mechanism of Ni-mediated trifluoromethylthiolation of aryl halides using AgSCF 3. Dalton Trans 2023; 52:3738-3745. [PMID: 36857666 DOI: 10.1039/d2dt03758k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
The mechanism of the Ni-catalysed trifluoromethylthiolation of aryl chlorides using AgSCF3 is studied herein. A variety of IPr NiII complexes were synthesized via oxidative addition of Ni0 to 2-(2-chloro)phenylpyridines. Their reactivity with AgSCF3 was tested by performing stoichiometric experiments, cyclic voltammetry, and NMR spectroscopic studies. CuSCF3 was shown to behave similarly to AgSCF3, while reactions with NMe4SCF3 revealed a major stoichiometric side reaction that forms a nickel fluoride complex. NMR kinetic studies revealed there is little correlation between the electron-withdrawing/donating nature of the para substituents on either the phenyl or pyridyl groups with the formation of the corresponding products. Cyclic voltammetry (CV) indicated the feasibilty of NiI/NiIII transitions, and an increased rate of formation of product was observed with increased solvent polarity. Evidence suggests that the mechanism proceeds via inner-sphere electron transfer (ET) from AgSCF3 to NiII, ultimately leading to the formation of the trifluoromethylthiolated product.
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Affiliation(s)
- Weiling Chiu
- Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
| | - Ben E Nadeau
- Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
| | - Brian O Patrick
- Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
| | - Jennifer A Love
- Department of Chemistry, The University of British Columbia, Vancouver, BC, V6T 1Z1, Canada.
- Department of Chemistry, University of Calgary, Calgary, AB, T2N 1N4, Canada
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4
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Magallon C, Griego L, Hu CH, Company A, Ribas X, Mirica LM. Organometallic Ni(II), Ni(III), and Ni(IV) Complexes Relevant to Carbon-Carbon and Carbon-Oxygen Bond Formation Reactions. Inorg Chem Front 2022. [DOI: 10.1039/d1qi01486b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis and spectroscopic and structural characterization of well-defined organometallic Ni(II) and Ni(III) complexes bearing the PyNMe3 ligand - a tetradentate N-based macrocyclic ligand which coordinates to the metal center...
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5
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Sabapathi G, Venuvanalingam P. Oxidative C–C/C–X coupling in organometallic nickel complexes: insights from DFT. NEW J CHEM 2022. [DOI: 10.1039/d2nj02480b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
NiIII and NiIV-center complexes prefer direct reductive elimination than reacting through five-coordinate intermediates. 32+ complex in the presence of Cl− undergoes Cl–Csp2 elimination preferably over Cl–Csp3 and Csp3–Csp2 elimination.
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Affiliation(s)
- Gopal Sabapathi
- Theoretical and Computational Chemistry Laboratory, School of Chemistry, Bharathidasan University, Tiruchirappalli 620024, India
| | - Ponnambalam Venuvanalingam
- Theoretical and Computational Chemistry Laboratory, School of Chemistry, Bharathidasan University, Tiruchirappalli 620024, India
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6
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Deolka S, Govindarajan R, Khaskin E, Fayzullin RR, Roy MC, Khusnutdinova JR. Photoinduced Trifluoromethylation of Arenes and Heteroarenes Catalyzed by High-Valent Nickel Complexes. Angew Chem Int Ed Engl 2021; 60:24620-24629. [PMID: 34477296 DOI: 10.1002/anie.202109953] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Indexed: 12/30/2022]
Abstract
We describe a series of air-stable NiIII complexes supported by a simple, robust naphthyridine-based ligand. Access to the high-valent oxidation state is enabled by the CF3 ligands on the nickel, while the naphthyridine exhibits either a monodentate or bidentate coordination mode that depends on the oxidation state and sterics, and enables facile aerobic oxidation of NiII to NiIII . These NiIII complexes act as efficient catalysts for photoinduced C(sp2 )-H bond trifluoromethylation reactions of (hetero)arenes using versatile synthetic protocols. This blue LED light-mediated catalytic protocol proceeds via a radical pathway and demonstrates potential in the late-stage functionalization of drug analogs.
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Affiliation(s)
- Shubham Deolka
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
| | - Ramadoss Govindarajan
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
| | - Eugene Khaskin
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
| | - Robert R Fayzullin
- Abuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 8 Arbuzov Street, Kazan, 420088, Russian Federation
| | - Michael C Roy
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
| | - Julia R Khusnutdinova
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Kunigami-gun, Okinawa, 904-0495, Japan
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7
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Deolka S, Govindarajan R, Khaskin E, Fayzullin RR, Roy MC, Khusnutdinova JR. Photoinduced Trifluoromethylation of Arenes and Heteroarenes Catalyzed by High‐Valent Nickel Complexes. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202109953] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Shubham Deolka
- Okinawa Institute of Science and Technology Graduate University Onna-son, Kunigami-gun Okinawa 904-0495 Japan
| | - Ramadoss Govindarajan
- Okinawa Institute of Science and Technology Graduate University Onna-son, Kunigami-gun Okinawa 904-0495 Japan
| | - Eugene Khaskin
- Okinawa Institute of Science and Technology Graduate University Onna-son, Kunigami-gun Okinawa 904-0495 Japan
| | - Robert R. Fayzullin
- Abuzov Institute of Organic and Physical Chemistry FRC Kazan Scientific Center of RAS 8 Arbuzov Street Kazan 420088 Russian Federation
| | - Michael C. Roy
- Okinawa Institute of Science and Technology Graduate University Onna-son, Kunigami-gun Okinawa 904-0495 Japan
| | - Julia R. Khusnutdinova
- Okinawa Institute of Science and Technology Graduate University Onna-son, Kunigami-gun Okinawa 904-0495 Japan
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8
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Na H, Watson MB, Tang F, Rath NP, Mirica LM. Photoreductive chlorine elimination from a Ni(iii)Cl 2 complex supported by a tetradentate pyridinophane ligand. Chem Commun (Camb) 2021; 57:7264-7267. [PMID: 34195702 DOI: 10.1039/d1cc02114a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein we report the isolation, characterization, and photoreactivity of a stable NiIII dichloride complex supported by a tetradentate pyridinophane N-donor ligand. Upon irradiation, this complex undergoes an efficient photoreductive chlorine elimination reaction, both in solution and the solid-state. Subsequently, the NiIIICl2 species can be regenerated via a reaction with PhICl2.
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Affiliation(s)
- Hanah Na
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
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9
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Fuchigami K, Watson MB, Tran GN, Rath NP, Mirica LM. Synthesis and Reactivity of (N2P2)Ni Complexes Stabilized by a Diphosphonite Pyridinophane Ligand. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00003] [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)
- Kei Fuchigami
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Michael B. Watson
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Giang N. Tran
- Department of Chemistry, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis, One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Liviu M. Mirica
- Department of Chemistry, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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10
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Nishimura T, Ando Y, Shinokubo H, Miyake Y. Cationic Nickel(II) Pyridinophane Complexes: Synthesis, Structures and Catalytic Activities for C–H Oxidation. CHEM LETT 2021. [DOI: 10.1246/cl.210074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tsubasa Nishimura
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yuki Ando
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Hiroshi Shinokubo
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
| | - Yoshihiro Miyake
- Department of Molecular and Macromolecular Chemistry, Graduate School of Engineering, Nagoya University, Nagoya, Aichi 464-8603, Japan
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11
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Takahashi T, Kurahashi T, Matsubara S. Nickel-Catalyzed Intermolecular Carbobromination of Alkynes. ACS Catal 2020. [DOI: 10.1021/acscatal.0c00980] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Toshifumi Takahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Takuya Kurahashi
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - Seijiro Matsubara
- Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
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12
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Nebra N. High-Valent Ni III and Ni IV Species Relevant to C-C and C-Heteroatom Cross-Coupling Reactions: State of the Art. Molecules 2020; 25:molecules25051141. [PMID: 32143336 PMCID: PMC7179250 DOI: 10.3390/molecules25051141] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 11/16/2022] Open
Abstract
Ni catalysis constitutes an active research arena with notable applications in diverse fields. By analogy with its parent element palladium, Ni catalysts provide an appealing entry to build molecular complexity via cross-coupling reactions. While Pd catalysts typically involve a M0/MII redox scenario, in the case of Ni congeners the mechanistic elucidation becomes more challenging due to their innate properties (like enhanced reactivity, propensity to undergo single electron transformations vs. 2e− redox sequences or weaker M–Ligand interaction). In recent years, mechanistic studies have demonstrated the participation of high-valent NiIII and NiIV species in a plethora of cross-coupling events, thus accessing novel synthetic schemes and unprecedented transformations. This comprehensive review collects the main contributions effected within this topic, and focuses on the key role of isolated and/or spectroscopically identified NiIII and NiIV complexes. Amongst other transformations, the resulting NiIII and NiIV compounds have efficiently accomplished: i) C–C and C–heteroatom bond formation; ii) C–H bond functionalization; and iii) N–N and C–N cyclizative couplings to forge heterocycles.
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Affiliation(s)
- Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier/CNRS UMR 5069, 118 Route de Narbonne, 31062 Toulouse, France
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13
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Negi C, Bawari D, Thakur SK, Choudhury AR, Singh S. Concise access to aluminum containing [3.3](2,6)pyridinophane and molecular bowl using 2,6-diamidopyridine modules. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.120943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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14
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Smith SM, Rath NP, Mirica LM. Axial Donor Effects on Oxidatively Induced Ethane Formation from Nickel–Dimethyl Complexes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00438] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sofia M. Smith
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry, University of Missouri−St. Louis, One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Liviu M. Mirica
- Department of Chemistry, University of Illinois at Urbana−Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
- Department of Chemistry, Washington University in St. Louis, One Brookings Drive, St. Louis, Missouri 63130-4899, United States
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15
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Bour JR, Ferguson DM, McClain EJ, Kampf JW, Sanford MS. Connecting Organometallic Ni(III) and Ni(IV): Reactions of Carbon-Centered Radicals with High-Valent Organonickel Complexes. J Am Chem Soc 2019; 141:8914-8920. [PMID: 31136162 DOI: 10.1021/jacs.9b02411] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper describes the one-electron interconversions of isolable NiIII and NiIV complexes through their reactions with carbon-centered radicals (R•). First, model NiIII complexes are shown to react with alkyl and aryl radicals to afford NiIV products. Preliminary mechanistic studies implicate a pathway involving direct addition of a carbon-centered radical to the NiIII center. This is directly analogous to the known reactivity of NiII complexes with R•, a step that is commonly implicated in catalysis. Second, a NiIV-CH3 complex is shown to react with aryl and alkyl radicals to afford C-C bonds via a proposed SH2-type mechanism. This pathway is leveraged to enable challenging H3C-CF3 bond formation under mild conditions. Overall, these investigations suggest that NiII/III/IV sequences may be viable redox pathways in high-oxidation-state nickel catalysis.
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Affiliation(s)
- James R Bour
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - Devin M Ferguson
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - Edward J McClain
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - Jeff W Kampf
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
| | - Melanie S Sanford
- Department of Chemistry , University of Michigan , 930 North University Avenue , Ann Arbor , Michigan 48109 , United States
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16
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Rajpurohit J, Shukla P, Kumar P, Das C, Vaidya S, Sundararajan M, Shanmugam M, Shanmugam M. Stabilizing Terminal Ni(III)-Hydroxide Complex Using NNN-Pincer Ligands: Synthesis and Characterization. Inorg Chem 2019; 58:6257-6267. [PMID: 31009214 DOI: 10.1021/acs.inorgchem.9b00466] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction of [Ni(COD)2] (COD; cyclooctadiene) in THF with the NNN-pincer ligand bis(imino)pyridyl (L1) reveals a susceptibility to oxidation in an inert atmosphere ([O2] level <0.5 ppm), resulting in a transient Ni:dioxygen adduct. This reactive intermediate abstracts a hydrogen atom from THF and stabilizes an uncommon Ni(III) complex. The complex is crystallographically characterized by a molecular formula of [NiIII(L1··)2-(OH)] (1). Various isotopically labeled experiments (16O/18O) assertively endorse the origin of terminal oxygen based ligand in 1 due to the activation of molecular dioxygen. The presence of proton bound to the terminal oxygen in 1 is well supported by NMR, IR spectroscopy, DFT calculations, and hydrogen atom transfer (HAT) reactions promoted by 1. The observation of shakeup satellite peaks for the primary photoelectron lines of Ni(2p) in the X-ray photoelectron spectroscopy (XPS) unambiguously confirms the paramagnetic signature associated with the distorted square planar nickel ion, which is consistent with the trivalent oxidation state assigned for the nickel ion in 1. The variable temperature magnetic susceptibility data of 1 shows dominant antiferromagnetic interactions exist among the paramagnetic centers, resulting in an overall S = 1/2 ground state. Variable temperature X-band EPR studies performed on 1 show evidence for the S = 1/2 ground state, which is consistent with magnetic data. The unusual g-tensor extracted for the ground state S = 1/2 is analyzed under a strong exchange limit of spin-coupled centers. The electronic structure predicted for 1 is in good agreement with theoretical calculations.
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Affiliation(s)
- Jitendrasingh Rajpurohit
- Department of Chemistry , Indian Institute of Technology Bombay , Powai - 400076 , Mumbai , Maharashtra , India
| | - Pragya Shukla
- Department of Chemistry , Indian Institute of Technology Bombay , Powai - 400076 , Mumbai , Maharashtra , India
| | - Pardeep Kumar
- Department of Chemistry , Indian Institute of Technology Bombay , Powai - 400076 , Mumbai , Maharashtra , India
| | - Chinmoy Das
- Department of Chemistry , Indian Institute of Technology Bombay , Powai - 400076 , Mumbai , Maharashtra , India
| | - Shefali Vaidya
- Department of Chemistry , Indian Institute of Technology Bombay , Powai - 400076 , Mumbai , Maharashtra , India
| | - Mahesh Sundararajan
- Theoretical Chemistry Section , Bhabha Atomic Research Centre , Mumbai - 400 085 , India
| | - Muralidharan Shanmugam
- Manchester Institute of Biotechnology , The University of Manchester , 131 Princes Street , Manchester - M1 7DN , U.K
| | - Maheswaran Shanmugam
- Department of Chemistry , Indian Institute of Technology Bombay , Powai - 400076 , Mumbai , Maharashtra , India
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17
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Bawari D, Negi C, Jaiswal K, Prashanth B, Choudhury AR, Singh S. Group 13 element containing conformationally rigid "N-E-N" heteroatomic bridged [3.3](2,6)pyridinophanes (E = B, Al). Chem Commun (Camb) 2018; 54:8857-8860. [PMID: 30039144 DOI: 10.1039/c8cc05154b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The first examples of group 13 element containing pyridinophanes have been assembled using heteroatom N-E-N bridges (E = B, Al). The presence of B and Al as acceptor atoms in the bridges and their coordination with pyridine nitrogen has a very strong influence on the conformational rigidity of the pyridinophanes.
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Affiliation(s)
- Deependra Bawari
- Department of Chemical Sciences, Indian Institute of Science Education and Research Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali 140306, Punjab, India.
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18
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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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19
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Khrizanforov MN, Fedorenko SV, Strekalova SO, Kholin KV, Mustafina AR, Zhilkin MY, Khrizanforova VV, Osin YN, Salnikov VV, Gryaznova TV, Budnikova YH. A Ni(iii) complex stabilized by silica nanoparticles as an efficient nanoheterogeneous catalyst for oxidative C-H fluoroalkylation. Dalton Trans 2018; 45:11976-82. [PMID: 27385649 DOI: 10.1039/c6dt01492e] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed Ni(III)-doped silica nanoparticles ([(bpy)xNi(III)]@SiO2) as a recyclable, low-leaching, and efficient oxidative functionalization nanocatalyst for aromatic C-H bonds. The catalyst is obtained by doping the complex [(bpy)3Ni(II)] on silica nanoparticles along with its subsequent electrooxidation to [(bpy)xNi(III)] without an additional oxidant. The coupling reaction of arenes with perfluoroheptanoic acid occurs with 100% conversion of reactants in a single step at room temperature under nanoheterogeneous conditions. The catalyst content is only 1% with respect to the substrates under electrochemical regeneration conditions. The catalyst can be easily separated from the reaction mixture and reused a minimum of five times. The results emphasize immobilization on the silica support and the electrochemical regeneration of Ni(III) complexes as a facile route for developing an efficient nanocatalyst for oxidative functionalization.
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Affiliation(s)
- Mikhail N Khrizanforov
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Svetlana V Fedorenko
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Sofia O Strekalova
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Kirill V Kholin
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Asiya R Mustafina
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Mikhail Ye Zhilkin
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Vera V Khrizanforova
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Yuri N Osin
- Kazan Federal University, 18 Kremlevskaya St., Kazan 420018, Russian Federation
| | - Vadim V Salnikov
- Kazan Federal University, 18 Kremlevskaya St., Kazan 420018, Russian Federation
| | - Tatyana V Gryaznova
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
| | - Yulia H Budnikova
- A.E.Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center, Russian Academy of Sciences, 8 Arbuzov Str., 420088 Kazan, Russian Federation.
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20
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Camasso NM, Canty AJ, Ariafard A, Sanford MS. Experimental and Computational Studies of High-Valent Nickel and Palladium Complexes. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00613] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nicole M. Camasso
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Allan J. Canty
- School
of Physical Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Alireza Ariafard
- School
of Physical Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Melanie S. Sanford
- Department
of Chemistry, University of Michigan, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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21
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D'Accriscio F, Borja P, Saffon-Merceron N, Fustier-Boutignon M, Mézailles N, Nebra N. C−H Bond Trifluoromethylation of Arenes Enabled by a Robust, High-Valent Nickel(IV) Complex. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706237] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Florian D'Accriscio
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier; CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Pilar Borja
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier; CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse ICT-FR2599; Université Paul Sabatier; CNRS; 31062 Toulouse Cedex France
| | - Marie Fustier-Boutignon
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier; CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Nicolas Mézailles
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier; CNRS; 118 Route de Narbonne 31062 Toulouse France
| | - Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée; Université Paul Sabatier; CNRS; 118 Route de Narbonne 31062 Toulouse France
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22
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D'Accriscio F, Borja P, Saffon-Merceron N, Fustier-Boutignon M, Mézailles N, Nebra N. C-H Bond Trifluoromethylation of Arenes Enabled by a Robust, High-Valent Nickel(IV) Complex. Angew Chem Int Ed Engl 2017; 56:12898-12902. [PMID: 28815889 DOI: 10.1002/anie.201706237] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Revised: 07/19/2017] [Indexed: 01/07/2023]
Abstract
The robust, high-valent NiIV complex [(Py)2 NiIV F2 (CF3 )2 ] (Py=pyridine) was synthesized and fully characterized by NMR spectroscopy, X-ray diffraction, and elemental analysis. It reacts with aromatic compounds at 25 °C to form the corresponding benzotrifluorides in nearly quantitative yield. The monomeric and dimeric NiIII CF3 complexes 2⋅Py and 2 were identified as key intermediates, and their structures were unambiguously determined by EPR spectroscopy and X-ray diffraction. Preliminary kinetic studies in combination with the isolation of reaction intermediates confirmed that the C-H bond-breaking/C-CF3 bond-forming sequence can occur both at NiIV CF3 and NiIII CF3 centers.
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Affiliation(s)
- Florian D'Accriscio
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Pilar Borja
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Nathalie Saffon-Merceron
- Institut de Chimie de Toulouse ICT-FR2599, Université Paul Sabatier, CNRS, 31062, Toulouse Cedex, France
| | - Marie Fustier-Boutignon
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Nicolas Mézailles
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
| | - Noel Nebra
- Laboratoire Hétérochimie Fondamentale et Appliquée, Université Paul Sabatier, CNRS, 118 Route de Narbonne, 31062, Toulouse, France
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23
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Chong E, Kampf JW, Ariafard A, Canty AJ, Sanford MS. Oxidatively Induced C-H Activation at High Valent Nickel. J Am Chem Soc 2017; 139:6058-6061. [PMID: 28425702 DOI: 10.1021/jacs.7b02387] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This communication describes a series of oxidatively induced intramolecular arene C-H activation reactions of NiII model complexes to yield NiIV σ-aryl products. These reactions proceed within 10 min at room temperature, which represents among the mildest conditions reported for C-H cleavage at a Ni center. A combination of density functional theory and preliminary experimental mechanistic studies implicate a pathway involving initial 2e- oxidation of the NiII starting materials by the F+ transfer reagent N-fluoro-2,4,6-trimethylpyridinium triflate followed by triflate-assisted C-H cleavage at NiIV to yield the products.
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Affiliation(s)
- Eugene Chong
- Department of Chemistry, University of Michigan , 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Jeff W Kampf
- Department of Chemistry, University of Michigan , 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Alireza Ariafard
- School of Physical Sciences, University of Tasmania , Hobart, Tasmania 7001, Australia
| | - Allan J Canty
- School of Physical Sciences, University of Tasmania , Hobart, Tasmania 7001, Australia
| | - Melanie S Sanford
- Department of Chemistry, University of Michigan , 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
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24
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Watson MB, Rath NP, Mirica LM. Oxidative C-C Bond Formation Reactivity of Organometallic Ni(II), Ni(III), and Ni(IV) Complexes. J Am Chem Soc 2016; 139:35-38. [PMID: 27997181 DOI: 10.1021/jacs.6b10303] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The use of the tridentate ligand 1,4,7-trimethyl-1,4,7-triazacyclononane (Me3tacn) and the cyclic alkyl/aryl C-donor ligand -CH2CMe2-o-C6H4- (cycloneophyl) allows for the synthesis of isolable organometallic NiII, NiIII, and NiIV complexes. Surprisingly, the five-coordinate NiIII complex is stable both in solution and the solid state, and exhibits limited C-C bond formation reactivity. Oxidation by one electron of this NiIII species generates a six-coordinate NiIV complex, with an acetonitrile molecule bound to Ni. Interestingly, illumination of the NiIV complex with blue LEDs results in rapid formation of the cyclic C-C product at room temperature. This reactivity has important implications for the recently developed dual Ni/photoredox catalytic systems proposed to involve high-valent organometallic Ni intermediates. Additional reactivity studies show the corresponding NiII species undergoes oxidative addition with alkyl halides, as well as rapid oxidation by O2, to generate detectable NiIII and/or NiIV intermediates and followed by C-C bond formation.
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Affiliation(s)
- Michael B Watson
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Nigam P Rath
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis , One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Liviu M Mirica
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
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25
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Meucci EA, Camasso NM, Sanford MS. An Organometalllic NiIV Complex That Participates in Competing Transmetalation and C(sp2)–O Bond-Forming Reductive Elimination Reactions. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00810] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Elizabeth A. Meucci
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Nicole M. Camasso
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Melanie S. Sanford
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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26
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Bour JR, Camasso NM, Meucci EA, Kampf JW, Canty AJ, Sanford MS. Carbon–Carbon Bond-Forming Reductive Elimination from Isolated Nickel(III) Complexes. J Am Chem Soc 2016; 138:16105-16111. [DOI: 10.1021/jacs.6b10350] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- James R. Bour
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Nicole M. Camasso
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Elizabeth A. Meucci
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Jeff W. Kampf
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
| | - Allan J. Canty
- School
of Physical Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Melanie S. Sanford
- Department
of Chemistry, University of Michigan, 930 N. University Avenue, Ann Arbor, Michigan 48109, United States
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27
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Schultz JW, Fuchigami K, Zheng B, Rath NP, Mirica LM. Isolated Organometallic Nickel(III) and Nickel(IV) Complexes Relevant to Carbon-Carbon Bond Formation Reactions. J Am Chem Soc 2016; 138:12928-12934. [PMID: 27599205 DOI: 10.1021/jacs.6b06862] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Nickel-catalyzed cross-coupling reactions are experiencing a dramatic resurgence in recent years given their ability to employ a wider range of electrophiles as well as promote stereospecific or stereoselective transformations. In contrast to the extensively studied Pd catalysts that generally employ diamagnetic intermediates, Ni systems can more easily access various oxidation states including odd-electron configurations. For example, organometallic NiIII intermediates with aryl and/or alkyl ligands are commonly proposed as the active intermediates in cross-coupling reactions. Herein, we report the first isolated NiIII-dialkyl complex and show that this species is involved in stoichiometric and catalytic C-C bond formation reactions. Interestingly, the rate of C-C bond formation from a NiIII center is enhanced in the presence of an oxidant, suggesting the involvement of transient NiIV species. Indeed, such a NiIV species was observed and characterized spectroscopically for a nickelacycle system. Overall, these studies suggest that both NiIII and NiIV species could play an important role in a range of Ni-catalyzed cross-coupling reactions, especially those involving alkyl substrates.
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Affiliation(s)
- Jason W Schultz
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Kei Fuchigami
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Bo Zheng
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
| | - Nigam P Rath
- Department of Chemistry and Biochemistry, University of Missouri-St. Louis , One University Boulevard, St. Louis, Missouri 63121-4400, United States
| | - Liviu M Mirica
- Department of Chemistry, Washington University , One Brookings Drive, St. Louis, Missouri 63130-4899, United States
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28
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Zhou W, Zheng S, Schultz JW, Rath NP, Mirica LM. Aromatic Cyanoalkylation through Double C–H Activation Mediated by Ni(III). J Am Chem Soc 2016; 138:5777-80. [DOI: 10.1021/jacs.6b02405] [Citation(s) in RCA: 57] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Wen Zhou
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Shuai Zheng
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Jason W. Schultz
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
| | - Nigam P. Rath
- Department
of Chemistry and Biochemistry, University of Missouri—St. Louis, St.
Louis, Missouri 63121-4400, United States
| | - Liviu M. Mirica
- Department
of Chemistry, Washington University, St. Louis, Missouri 63130-4899, United States
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29
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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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30
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Zhou W, Rath NP, Mirica LM. Oxidatively-induced aromatic cyanation mediated by Ni(iii). Dalton Trans 2016; 45:8693-5. [PMID: 26845423 DOI: 10.1039/c6dt00064a] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A Ni(ii) complex with two t-butylisocyanide ligands supported by a N3C(-) type tetradentate ligand was synthesized and characterized. Quantitative generation of the aromatic cyanation product, (tBu)N3C-CN, is observed by reacting this Ni(ii) complex with 1 equiv. of an oxidant. Reactivity studies suggest that this oxidatively-induced cyanation involves a heterolytic cleavage of the N-(t)Bu bond and is mediated by Ni(iii).
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Affiliation(s)
- Wen Zhou
- Department of Chemistry, Washington University, One Brookings Drive, St. Louis, Missouri 63130-4899, USA.
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31
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Zhou W, Watson MB, Zheng S, Rath NP, Mirica LM. Ligand effects on the properties of Ni(iii) complexes: aerobically-induced aromatic cyanation at room temperature. Dalton Trans 2016; 45:15886-15893. [DOI: 10.1039/c6dt02185a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ligand effect studies on (RN3C)NiIIIL2 complexes reveal aerobically-induced aromatic cyanation with tBuNC at room temperature for the (NpN3C)Ni system.
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Affiliation(s)
- Wen Zhou
- Department of Chemistry
- Washington University
- St. Louis
- USA
| | | | - Shuai Zheng
- Department of Chemistry
- Washington University
- St. Louis
- USA
| | - Nigam P. Rath
- Department of Chemistry and Biochemistry
- University of Missouri-St. Louis
- One University Boulevard
- St. Louis
- USA
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32
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Leclerc MC, Bayne JM, Lee GM, Gorelsky SI, Vasiliu M, Korobkov I, Harrison DJ, Dixon DA, Baker RT. Perfluoroalkyl Cobalt(III) Fluoride and Bis(perfluoroalkyl) Complexes: Catalytic Fluorination and Selective Difluorocarbene Formation. J Am Chem Soc 2015; 137:16064-73. [DOI: 10.1021/jacs.5b12003] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Matthew C. Leclerc
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Julia M. Bayne
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Graham M. Lee
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Serge I. Gorelsky
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Monica Vasiliu
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - Ilia Korobkov
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - Daniel J. Harrison
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
| | - David A. Dixon
- Department
of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487, United States
| | - R. Tom Baker
- Department
of Chemistry and Biomolecular Sciences and Centre for Catalysis Research
and Innovation, University of Ottawa, 30 Marie Curie, Ottawa, Ontario K1N 6N5, Canada
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33
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Bour JR, Camasso NM, Sanford MS. Oxidation of Ni(II) to Ni(IV) with Aryl Electrophiles Enables Ni-Mediated Aryl-CF3 Coupling. J Am Chem Soc 2015; 137:8034-7. [PMID: 26079544 DOI: 10.1021/jacs.5b04892] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This communication describes the synthesis and reactivity of Ni(IV)(aryl)(CF3)2 complexes supported by trispyrazolylborate and 4,4'-di-tert-butylbipyridine ligands. We demonstrate that isolable Ni(IV) complexes can be accessed under mild conditions via the oxidation of Ni(II) precursors with S-(trifluoromethyl)dibenzothiophenium triflate as well as with diaryliodonium and aryl diazonium reagents. The Ni(IV) intermediates undergo high yielding aryl-CF3 bond-forming reductive elimination. These studies support the potential viability of Ni(IV) intermediates in nickel-catalyzed coupling reactions involving diaryliodonium and aryldiazonium electrophiles.
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Affiliation(s)
- James R Bour
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Nicole M Camasso
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
| | - Melanie S Sanford
- University of Michigan, Department of Chemistry, 930 North University Avenue, Ann Arbor, Michigan 48109, United States
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