1
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Panda S, Phan H, Dunietz EM, Brueggemeyer MT, Hota PK, Siegler MA, Jose A, Bhadra M, Solomon EI, Karlin KD. Intramolecular Phenolic H-Atom Abstraction by a N 3ArOH Ligand-Supported (μ-η 2:η 2-Peroxo)dicopper(II) Species Relevant to the Active Site Function of oxy-Tyrosinase. J Am Chem Soc 2024; 146:14942-14947. [PMID: 38775712 PMCID: PMC11193493 DOI: 10.1021/jacs.4c04402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Synthetic side-on peroxide-bound dicopper(II) (SP) complexes are important for understanding the active site structure/function of many copper-containing enzymes. This work highlights the formation of new {CuII(μ-η2:η2-O22-)CuII} complexes (with electronic absorption and resonance Raman (rR) spectroscopic characterization) using tripodal N3ArOH ligands at -135 °C, which spontaneously participate in intramolecular phenolic H-atom abstraction (HAA). This results in the generation of bis(phenoxyl radical)bis(μ-OH)dicopper(II) intermediates, substantiated by their EPR/UV-vis/rR spectroscopic signatures and crystal structural determination of a diphenoquinone dicopper(I) complex derived from ligand para-C═C coupling. The newly observed chemistry in these ligand-Cu systems is discussed with respect to (a) our Cu-MeAN (tridentate N,N,N',N',N″-pentamethyldipropylenetriamine)-derived model SP species, which was unreactive toward exogenous monophenol addition (J. Am. Chem. Soc. 2012, 134, 8513-8524), emphasizing the impact of intramolecularly tethered ArOH groups, and (b) recent advances in understanding the mechanism of action of the tyrosinase (Ty) enzyme.
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Affiliation(s)
- Sanjib Panda
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Hai Phan
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Eleanor M Dunietz
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | | | - Pradip Kumar Hota
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Maxime A Siegler
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Anex Jose
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Mayukh Bhadra
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Kenneth D Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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2
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Siebe L, Butenuth C, Stammler A, Bögge H, Walleck S, Glaser T. Generation and Reactivity of μ-1,2-Peroxo Cu IICu II and Bis-μ-oxo Cu IIICu III Species and Catalytic Hydroxylation of Benzene to Phenol with Hydrogen Peroxide. Inorg Chem 2024; 63:2627-2639. [PMID: 38243916 DOI: 10.1021/acs.inorgchem.3c03914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2024]
Abstract
Tetradentate-N4 ligands stabilize dinuclear {CuII(μ-1,2-peroxo)CuII} and {CuIII(μ-O)2CuIII} species, and CuII complexes of these ligands were reported to catalyze the oxidation of benzene with H2O2. Here, we report {CuII(μ-1,2-peroxo)CuII} and {CuIII(μ-O)2CuIII} intermediates of dinucleating bis(tetradentate-N4) ligands depending on the absence or presence of 6-methyl substituents on the terminal pyridine donors, respectively, generated either from {CuICuI} precursors with O2 or from {CuIICuII} precursors with H2O2 and NEt3. Both intermediates are not stable even at low temperatures, but they show no electrophilic HAT reactivity with DHA. Catalytic investigations on the hydroxylation of benzene with excess H2O2 between 30 and 50 °C indicate that both radical-based and {Cu2On}-based mechanisms depend strongly on the catalytic conditions. In the presence of a radical scavenger, TONs of ∼920/∼720 have been achieved without/with the 6-methyl group of the ligand. Although {CuII(μ-OH)CuII} reacts with excess H2O2 at -40 °C to {CuII(OOH)}2 species, these are only stable for seconds at 20 °C and cannot account for catalytic oxidations over a period of 24 h at 30-50 °C.
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Affiliation(s)
- Lena Siebe
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Christoph Butenuth
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Anja Stammler
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Hartmut Bögge
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Stephan Walleck
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
| | - Thorsten Glaser
- Lehrstuhl für Anorganische Chemie I, Fakultät für Chemie, Universität Bielefeld, Universitätsstr. 25, D-33615 Bielefeld, Germany
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3
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Kc K, Woods T, Olshansky L. Ligand Modifications Produce Two-Step Magnetic Switching in a Cobalt(dioxolene) Complex. Angew Chem Int Ed Engl 2023; 62:e202311790. [PMID: 37733206 PMCID: PMC10615740 DOI: 10.1002/anie.202311790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/20/2023] [Accepted: 09/21/2023] [Indexed: 09/22/2023]
Abstract
Mononuclear monodioxolene valence tautomeric (VT) cobalt complexes typically exist in their low spin (l.s.) CoIII (cat2- ) and high spin (h.s.) CoII (sq⋅- ) forms (cat2- =catecholato, and sq⋅- =seminquinonato forms of 3,5-di-t Bu-1,2-dioxolene), which reversibly interconvert via temperature-dependent intramolecular electron transfer. Typically, the remaining four coordination sites on cobalt are supported by a tetradentate ligand whose properties influence the temperature at which VT occurs. We report that replacing one chelating pyridyl arm of tris(2-pyridylmethyl)amine (tpa) with a weaker field ortho-anisole moiety facilitates access to a third magnetic state, and examine a series of related complexes. Variable temperature crystallographic, magnetic, calorimetric, and spectroscopic studies support that this third state is consistent with l.s. CoII (sq⋅- ). Thus, our ligand modifications not only provide access to the VT transition from l.s. CoIII (cat2- ) to l.s. CoII (sq⋅- ), but at higher temperatures, the complex undergoes spin crossover from l.s. CoII (sq⋅- ) to h.s. CoII (sq⋅- ), representing the first example of two-step magnetic switching in a mononuclear monodioxolene cobalt complex. We hypothesize that ligand dynamicity may facilitate access to the rarely observed l.s. CoII (sq⋅- ) intermediate state, suggesting a new design criterion in the development of stimulus-responsive multi-state molecular switches.
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Affiliation(s)
- Khadanand Kc
- Department of Chemistry, Center for Biophysics and Quantitative Biology, Materials Research Laboratory, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Toby Woods
- George L. Clark X-Ray Facility and 3 M Materials Laboratory, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA
| | - Lisa Olshansky
- Department of Chemistry, Center for Biophysics and Quantitative Biology, Materials Research Laboratory, University of Illinois, Urbana-Champaign, Urbana, Illinois, 61801, USA
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4
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Noß C, Göttlich R, Schindler S. Photochemically Mediated Toluene Oxidation through a Copper Complex. Chemistry 2023; 29:e202301142. [PMID: 37194744 DOI: 10.1002/chem.202301142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/17/2023] [Accepted: 05/17/2023] [Indexed: 05/18/2023]
Abstract
A method is described to photochemically oxidize toluene selectively to benzaldehyde, an essential compound in the chemical industry. Copper(I) complexes with different ligands were applied in combination with [Ru(bipy)3 ](PF6 )2 and dioxygen as the oxidant. As a result, a "dioxygen adduct" copper complex, for example, a peroxido complex, is formed as the active species. The copper(II) complex obtained after oxidation can be photochemically reduced to the starting copper(I) species, and the process can be repeated continuously. The ligand tris(2-methylpyridyl)amine (tmpa) led to the highest conversion rates.
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Affiliation(s)
- Christian Noß
- Institute for Inorganic and Analytical Chemistry, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
- Institute for Organic Chemistry, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
| | - Richard Göttlich
- Institute for Organic Chemistry, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
| | - Siegfried Schindler
- Institute for Inorganic and Analytical Chemistry, Justus-Liebig-University Gießen, Heinrich-Buff-Ring 17, 35392, Gießen, Germany
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5
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Koley S, Cayton KT, González-Montiel GA, Yadav MR, Orsi DL, Intelli AJ, Cheong PHY, Altman RA. Cu(II)-Catalyzed Unsymmetrical Dioxidation of gem-Difluoroalkenes to Generate α,α-Difluorinated-α-phenoxyketones. J Org Chem 2022; 87:10710-10725. [PMID: 35914193 PMCID: PMC9391295 DOI: 10.1021/acs.joc.2c00925] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A Cu-based catalyst system convergently couples gem-difluoroalkenes with phenols under aerobic conditions to deliver α,α-difluorinated-α-phenoxyketones, an unstudied hybrid fluorinated functional group. Composed of α,α-difluorinated ketone and α,α-difluorinated ether moieties, these compounds have rarely been reported as a synthetic intermediate. Computational predictions and later experimental corroboration suggest that the phenoxy-substituted fluorinated ketone's sp3-hybridized hydrate form is energetically favored relative to the respective nonether variant and that perturbation of the electronic character of the ketone can further encourage the formation of the hydrate. The more facile conversion between ketone and hydrate forms suggests that analogues should readily covalently inhibit proteases and other enzymes. Further functionalization of the ketone group enables access to other useful fluorinated functional groups.
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Affiliation(s)
- Suvajit Koley
- Department of Medicinal Chemistry and Molecular Pharmacology; Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Kaylee T. Cayton
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, USA
| | | | - M. Ramu Yadav
- Department of Chemistry, MS-723, IIT Delhi, Hauz Khas, New Delhi, India 110016
| | - Douglas L. Orsi
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts 02142, USA
| | - Andrew J. Intelli
- Department of Medicinal Chemistry and Molecular Pharmacology; Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, Oregon 97331, USA
| | - Ryan A. Altman
- Department of Medicinal Chemistry and Molecular Pharmacology; Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, USA
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6
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Li R, Khan FST, Tapia M, Hematian S. Oxygenation of copper(I) complexes containing fluorine tagged tripodal tetradentate chelates: significant ligand electronic effects. J COORD CHEM 2022. [DOI: 10.1080/00958972.2022.2107429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Affiliation(s)
- Runzi Li
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Firoz Shah Tuglak Khan
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Marcos Tapia
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Shabnam Hematian
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC, USA
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7
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Rajeev A, Balamurugan M, Sankaralingam M. Rational Design of First-Row Transition Metal Complexes as the Catalysts for Oxidation of Arenes: A Homogeneous Approach. ACS Catal 2022. [DOI: 10.1021/acscatal.2c01928] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Anjana Rajeev
- Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
| | - Mani Balamurugan
- Department of Materials Science and Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea
| | - Muniyandi Sankaralingam
- Bioinspired & Biomimetic Inorganic Chemistry Lab, Department of Chemistry, National Institute of Technology Calicut, Kozhikode, Kerala 673601, India
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8
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Griffin PJ, Charette BJ, Burke JH, Vura-Weis J, Schaller RD, Gosztola DJ, Olshansky L. Toward Improved Charge Separation through Conformational Control in Copper Coordination Complexes. J Am Chem Soc 2022; 144:12116-12126. [PMID: 35762527 DOI: 10.1021/jacs.2c02580] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The continued development of solar energy as a renewable resource necessitates new approaches to sustaining photodriven charge separation (CS). We present a bioinspired approach in which photoinduced conformational rearrangements at a ligand are translated into changes in coordination geometry and environment about a bound metal ion. Taking advantage of the differential coordination properties of CuI and CuII, these dynamics aim to facilitate intramolecular electron transfer (ET) from CuI to the ligand to create a CS state. The synthesis and photophysical characterization of CuCl(dpaaR) (dpaa = dipicolylaminoacetophenone, with R = H and OMe) are presented. These ligands incorporate a fluorophore that gives rise to a twisted intramolecular charge transfer (TICT) excited state. Excited-state ligand twisting provides a tetragonal coordination geometry capable of capturing CuII when an internal ortho-OMe binding site is present. NMR, IR, electron paramagnetic resonance (EPR), and optical spectroscopies, X-ray diffraction, and electrochemical methods establish the ground-state properties of these CuI and CuII complexes. The photophysical dynamics of the CuI complexes are explored by time-resolved photoluminescence and optical transient absorption spectroscopies. Relative to control complexes lacking a TICT-active ligand, the lifetimes of CS states are enhanced ∼1000-fold. Further, the presence of the ortho-OMe substituent greatly enhances the lifetime of the TICT* state and biases the coordination environment toward CuII. The presence of CuI decreases photoinduced degradation from 14 to <2% but does not result in significant quenching via ET. Factors affecting CS in these systems are discussed, laying the groundwork for our strategy toward solar energy conversion.
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Affiliation(s)
- Paul J Griffin
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Bronte J Charette
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - John H Burke
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Josh Vura-Weis
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - David J Gosztola
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Lisa Olshansky
- Department of Chemistry, University of Illinois Urbana-Champaign, 600 South Mathews Avenue, Urbana, Illinois 61801, United States
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9
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Charette BJ, Griffin PJ, Zimmerman CM, Olshansky L. Conformationally dynamic copper coordination complexes. Dalton Trans 2022; 51:6212-6219. [PMID: 35357384 PMCID: PMC9188647 DOI: 10.1039/d2dt00312k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The interplay between oxidation state and coordination geometry dictates both kinetic and thermodynamic properties underlying electron transfer events in copper coordination complexes. An ability to stabilize both CuI and CuII oxidation states in a single conformationally dynamic chelating ligand allows access to controlled redox reactivity. We report an analysis of the conformational dynamics of CuI complexes bearing dipicolylaniline (dpaR) ligands, with ortho-aniline substituents R = H and R = OMe. Variable temperature NMR spectroscopy and electrochemical experiments suggest that in solution at room temperature, an equilibrium exists between two conformers. Two metal-centered redox events are observed which, bolstered by structural information from single crystal X-ray diffraction and solution information from EPR and NMR spectroscopies, are ascribed to the CuII/I couple in planar and tetrahedral conformations. Activation and equilibrium parameters for these structural interconversions are presented and provide entry to leveraging redox-triggered conformational dynamics at Cu.
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Affiliation(s)
- Bronte J Charette
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.
| | - Paul J Griffin
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.
| | - Claire M Zimmerman
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.
| | - Lisa Olshansky
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, Illinois, 61801, USA.
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10
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Petrillo A, Hoffmann A, Becker J, Herres‐Pawlis S, Schindler S. Copper Mediated Intramolecular vs. Intermolecular Oxygenations: The Spacer makes the Difference! Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alexander Petrillo
- Institute of Inorganic and Analytical Chemistry Justus-Liebig-University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Alexander Hoffmann
- Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1a 52074 Aachen Germany
| | - Jonathan Becker
- Institute of Inorganic and Analytical Chemistry Justus-Liebig-University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
| | - Sonja Herres‐Pawlis
- Institute of Inorganic Chemistry RWTH Aachen University Landoltweg 1a 52074 Aachen Germany
| | - Siegfried Schindler
- Institute of Inorganic and Analytical Chemistry Justus-Liebig-University Giessen Heinrich-Buff-Ring 17 35392 Giessen Germany
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11
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Ahmad Bhat I, Avinash I, Kumar Sachan S, Singh S, Anantharaman G. Efficient Synthesis of Cu(II)‐
N
‐Heterocyclic Carbene Complexes in Water and Their Activity Towards Aerobic Alcohol Oxidation. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100631] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Irshad Ahmad Bhat
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Iruthayaraj Avinash
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Sharad Kumar Sachan
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
| | - Sadhana Singh
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208016 India
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12
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Zhong X, Bouchey CJ, Kabir E, Tolman WB. Using a monocopper-superoxo complex to prepare multicopper-peroxo species relevant to proposed enzyme intermediates. J Inorg Biochem 2021; 222:111498. [PMID: 34120095 PMCID: PMC9835715 DOI: 10.1016/j.jinorgbio.2021.111498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Revised: 05/29/2021] [Accepted: 05/29/2021] [Indexed: 01/16/2023]
Abstract
With the goal of generating a (peroxo)tricopper species analogous to the Peroxy Intermediate proposed for multicopper oxidases, solutions of the copper-superoxide complex [K(Krypt)][LCuO2] (L = N,N'-bis(2,6-diisopropylphenyl)-2,6-pyridinedicarboxamide, Krypt = 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) were reacted with the dicopper(I) complex [(TPBN)Cu2(MeCN)2][PF6]2 at -70 °C (TPBN = N,N,N',N'-tetrakis-(2-pyridylmethyl)-1,4-diaminobutane). A metastable intermediate formed, which on the basis of UV-vis, EPR, and resonance Raman spectroscopy was proposed to derive from reaction of two equivalents of the copper-superoxide with one equivalent of the dicopper(I) complex to yield a complex with two (peroxo)dicopper moieties rather than the desired (peroxo)tricopper PI model. A similar intermediate formed upon reaction of [K(Krypt)][LCuO2] with [(BPMA)Cu(MeCN)][PF6] (BPMA = N,N-bis(2-pyridylmethyl)-methyl-amine), which contained the same donor set as provided by TPBN. Comparison of resonance Raman data and consideration of structural preferences for LCuX species led to hypothesis of a μ-η1:η2-peroxo structure for both intermediates.
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Affiliation(s)
- Xinzhe Zhong
- Department of Chemistry, Washington University in St. Louis, One Brookings Hall, Campus Box 1134, St. Louis, MO 63130-4899, United States of America
| | - Caitlin J. Bouchey
- Department of Chemistry, Washington University in St. Louis, One Brookings Hall, Campus Box 1134, St. Louis, MO 63130-4899, United States of America,Department of Chemistry, University of Minnesota, 207 Pleasant St. SE, Minneapolis, MN 55455, United States of America
| | - Evanta Kabir
- Department of Chemistry, Washington University in St. Louis, One Brookings Hall, Campus Box 1134, St. Louis, MO 63130-4899, United States of America
| | - William B. Tolman
- Department of Chemistry, Washington University in St. Louis, One Brookings Hall, Campus Box 1134, St. Louis, MO 63130-4899, United States of America,Corresponding author. (W.B. Tolman)
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13
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Brückmann T, Becker J, Würtele C, Seuffert MT, Heuler D, Müller-Buschbaum K, Weiß M, Schindler S. Characterization of copper complexes with derivatives of the ligand (2-aminoethyl)bis(2-pyridylmethyl)amine (uns-penp) and their reactivity towards oxygen. J Inorg Biochem 2021; 223:111544. [PMID: 34333248 DOI: 10.1016/j.jinorgbio.2021.111544] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Revised: 07/05/2021] [Accepted: 07/12/2021] [Indexed: 11/18/2022]
Abstract
A series of copper(I) complexes with ligands derived from the tripodal ligand (2-aminoethyl)bis(2-pyridylmethyl)amine (uns-penp) have been structurally characterized and their redox chemistry analyzed by cyclic voltammetry. While the redox potentials of most of the complexes were similar their reactivity towards dioxygen was quite different. While the complex with a ferrocene derived ligand of uns-penp reacted in solution at low temperatures in a two-step reaction from the preliminary formed mononuclear end-on superoxido complex to a quite stable dinuclear peroxido complex it did not react with dioxygen in the solid state. Other complexes also did not react with dioxygen in the solid state while some showed a reversible formation to a green compound, indicating formation of an end-on superoxido complex that unfortunately so far could not be characterized. In contrast, copper complexes with the Me2uns-penp and Et-iProp-uns-penp formed dinuclear peroxido complexes in a solid-state reaction. While the reaction of dioxygen with the [Cu(Me2uns-penp]BPh4 was quite slow an instant reaction took place for [Cu(Et-iProp-uns-penp]BPh. Very unusual, it turned out that crystals of the copper(I) complex that could be structurally characterized still were crystalline when reacted with dioxygen. Therefore, it was possible to solve the structure of the corresponding dinuclear peroxido complex directly from the same batch of crystals. The crystalline structures of the copper(I) and copper(II) complex revealed that the reason for this is the fact, that the copper(I) complex is kind of preorganized for the uptake of dioxygen and does not really change in its overall structure when being oxidized.
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Affiliation(s)
- Tim Brückmann
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Jonathan Becker
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Christian Würtele
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Marcel Thomas Seuffert
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Dominik Heuler
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Klaus Müller-Buschbaum
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany
| | - Morten Weiß
- Fakultät für Biologie, Chemie und Geowissenschaften, Universität Bayreuth, Universitätsstrasse 30, 95447 Bayreuth, Germany
| | - Siegfried Schindler
- Institut für Anorganische und Analytische Chemie, Justus-Liebig-Universität, Heinrich-Buff-Ring 17, 35392 Gießen, Germany.
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14
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Stöhr F, Kulhanek N, Becker J, Göttlich R, Schindler S. Reactivity of Copper(I) Complexes Containing Ligands Derived from (1
S
,3
R
)‐Camphoric Acid with Dioxygen. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100187] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Fabian Stöhr
- Institute for Inorganic and Analytical Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Niclas Kulhanek
- Institute for Organic Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Jonathan Becker
- Institute for Inorganic and Analytical Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Richard Göttlich
- Institute for Organic Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Siegfried Schindler
- Institute for Inorganic and Analytical Chemistry Justus-Liebig-University Gießen Heinrich-Buff-Ring 17 35392 Gießen Germany
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15
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Rhoda HM, Plessers D, Heyer AJ, Bols ML, Schoonheydt RA, Sels BF, Solomon EI. Spectroscopic Definition of a Highly Reactive Site in Cu-CHA for Selective Methane Oxidation: Tuning a Mono-μ-Oxo Dicopper(II) Active Site for Reactivity. J Am Chem Soc 2021; 143:7531-7540. [PMID: 33970624 DOI: 10.1021/jacs.1c02835] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Using UV-vis and resonance Raman spectroscopy, we identify a [Cu2O]2+ active site in O2 and N2O activated Cu-CHA that reacts with methane to form methanol at low temperature. The Cu-O-Cu angle (120°) is smaller than that for the [Cu2O]2+ core on Cu-MFI (140°), and its coordination geometry to the zeolite lattice is different. Site-selective kinetics obtained by operando UV-vis show that the [Cu2O]2+ core on Cu-CHA is more reactive than the [Cu2O]2+ site in Cu-MFI. From DFT calculations, we find that the increased reactivity of Cu-CHA is a direct reflection of the strong [Cu2OH]2+ bond formed along the H atom abstraction reaction coordinate. A systematic evaluation of these [Cu2O]2+ cores reveals that the higher O-H bond strength in Cu-CHA is due to the relative orientation of the two planes of the coordinating bidentate O-Al-O T-sites that connect the [Cu2O]2+ core to the zeolite lattice. This work along with our earlier study ( J. Am. Chem. Soc, 2018, 140, 9236-9243) elucidates how zeolite lattice constraints can influence active site reactivity.
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Affiliation(s)
- Hannah M Rhoda
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Dieter Plessers
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Alexander J Heyer
- Department of Chemistry, Stanford University, Stanford, California 94305, United States
| | - Max L Bols
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Robert A Schoonheydt
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Bert F Sels
- Department of Microbial and Molecular Systems, Center for Sustainable Catalysis and Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| | - Edward I Solomon
- Department of Chemistry, Stanford University, Stanford, California 94305, United States.,Photon Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, United States
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16
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Gawlig C, Jung J, Mollenhauer D, Schindler S. Synthesis and characterization of copper complexes with tripodal ligands bearing amino acid groups. Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202000320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Christopher Gawlig
- Justus-Liebig-Universität Gießen Institut für Anorganische und Analytische Chemie Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Jannis Jung
- Justus-Liebig-Universität Gießen Institut für Physikalische Chemie Heinrich-Buff-Ring 17 35392 Gießen Germany
- Center for Materials Research (ZfM/LaMa) Justus-Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
| | - Doreen Mollenhauer
- Justus-Liebig-Universität Gießen Institut für Physikalische Chemie Heinrich-Buff-Ring 17 35392 Gießen Germany
- Center for Materials Research (ZfM/LaMa) Justus-Liebig University Giessen Heinrich-Buff-Ring 16 35392 Giessen Germany
| | - Siegfried Schindler
- Justus-Liebig-Universität Gießen Institut für Anorganische und Analytische Chemie Heinrich-Buff-Ring 17 35392 Gießen Germany
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17
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Immobilization of a copper complex based on the tripodal ligand (2‐aminoethyl)bis(2‐pyridylmethyl)amine (uns‐penp). Z Anorg Allg Chem 2021. [DOI: 10.1002/zaac.202100022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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18
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Marquardt M, Cula B, Budhija V, Dallmann A, Schwalbe M. Structural Determination of an Unusual Cu I -Porphyrin-π-Bond in a Hetero-Pacman Cu-Zn-Complex. Chemistry 2021; 27:3991-3996. [PMID: 33405305 PMCID: PMC7986761 DOI: 10.1002/chem.202004945] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Revised: 12/17/2020] [Indexed: 12/02/2022]
Abstract
The synthesis and characterization of a hetero‐dinuclear compound is presented, in which a copper(I) trishistidine type coordination unit is positioned directly above a zinc porphyrin unit. The close distance between the two coordination fragments is secured by a rigid xanthene backbone, and a unique (intramolecular) copper porphyrin‐π‐bond was determined for the first time in the molecular structure. This structural motif was further analyzed by temperature‐dependent NMR studies: In solution at room temperature the coordinative bond fluctuates, while it can be frozen at low temperatures. Preliminary reactivity studies revealed a reduced reactivity of the copper(I) moiety towards dioxygen. The results adumbrate why nature is avoiding metal porphyrin‐π‐bonds by fixing reactive metal centers in a predetermined distance to each other within multimetallic enzymatic reaction centers.
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Affiliation(s)
- Michael Marquardt
- Institute of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Beatrice Cula
- Institute of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Vishal Budhija
- Institute of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - André Dallmann
- Institute of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
| | - Matthias Schwalbe
- Institute of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Strasse 2, 12489, Berlin, Germany
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19
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Anjana SS, Varghese B, Murthy NN. Coligand modulated oxidative O-demethylation of a methyl ether appended tetradentate N-ligand in Co(ii) complexes. Dalton Trans 2020; 49:3187-3197. [PMID: 31967148 DOI: 10.1039/c9dt04609g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Two Co(ii) complexes of the formula CoLOMeX2 (X = Cl- (1a); X = I- (1b)), where LOMe is 2-methoxy-N,N-bis(pyridin-2-ylmethyl) aniline, were synthesized and their structure, spectra and reactivity were studied. Upon oxidation of 1a and 1b, the ligand LOMe undergoes demethylation at the metal centre resulting in the formation of Co(iii) complexes with modified phenoxide ligands. This is the very first example of oxidative O-demethylation reported at a Co(ii) centre. The oxidative behaviour exhibits a striking dependence on the nature of coligands coordinated to the metal centre. The Co(ii) complex 1a with stronger chloro coligands requires a strong oxidising agent like t-BuOOH for oxidative demethylation and the subsequent formation of a mononuclear Co(iii) complex with a demethylated ligand, CoLO-Cl2 (2). On the other hand, complex 1b with weaker iodo coligands undergoes oxidation in the presence of the weak oxidant O2 to form a dihydroxo bridged binuclear Co(iii) complex [Co2(LO-)2(OH)2]2+ (3) with modified phenoxide ligands. The oxidation of 1b to 3 is monitored and the intermediate Co(ii) iodo aqua complex [CoLOMeI(H2O)]+ and Co(ii) diaqua complex [CoLOMe(H2O)2]2+ are isolated and characterised.
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Affiliation(s)
- S S Anjana
- Department of Chemistry, IIT Madras, Chennai 600 036, India.
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20
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A copper complex based catalytic conversion and isolation of carbonate from CO2 for the carbon sequestration process. J IND ENG CHEM 2020. [DOI: 10.1016/j.jiec.2019.11.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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21
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Chen S, Chen W, Chen X, Chen G, Ackermann L, Tian X. Copper(I)-Catalyzed Oxyamination of β,γ-Unsaturated Hydrazones: Synthesis of Dihydropyrazoles. Org Lett 2019; 21:7787-7790. [DOI: 10.1021/acs.orglett.9b02733] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Shanshan Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Wenming Chen
- Department of Pharmaceutical Production Center, The First Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, Hunan 410007, China
| | - Xu Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Guifang Chen
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie, Georg-August-Universität, Tammannstraße 2, 37077 Göttingen, Germany
| | - Xu Tian
- Key Laboratory of Molecular Target & Clinical Pharmacology and the State Key Laboratory of Respiratory Disease, School of Pharmaceutical Sciences & the Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou, Guangdong 511436, China
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22
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Schön F, Biebl F, Greb L, Leingang S, Grimm‐Lebsanft B, Teubner M, Buchenau S, Kaifer E, Rübhausen MA, Himmel H. On the Metal Cooperativity in a Dinuclear Copper–Guanidine Complex for Aliphatic C−H Bond Cleavage by Dioxygen. Chemistry 2019; 25:11257-11268. [DOI: 10.1002/chem.201901906] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Florian Schön
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Florian Biebl
- Institut für Nanostruktur- und FestkörperphysikUniversität Hamburg and Center for Free Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany
| | - Lutz Greb
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Simone Leingang
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Benjamin Grimm‐Lebsanft
- Institut für Nanostruktur- und FestkörperphysikUniversität Hamburg and Center for Free Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany
| | - Melissa Teubner
- Institut für Nanostruktur- und FestkörperphysikUniversität Hamburg and Center for Free Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany
| | - Sören Buchenau
- Institut für Nanostruktur- und FestkörperphysikUniversität Hamburg and Center for Free Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Michael A. Rübhausen
- Institut für Nanostruktur- und FestkörperphysikUniversität Hamburg and Center for Free Electron Laser Science Luruper Chaussee 149 22761 Hamburg Germany
| | - Hans‐Jörg Himmel
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
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23
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Noh H, Cho J. Synthesis, characterization and reactivity of non-heme 1st row transition metal-superoxo intermediates. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2018.12.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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24
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Quist DA, Ehudin MA, Karlin KD. Unprecedented direct cupric-superoxo conversion to a bis- μ-oxo dicopper(III) complex and resulting oxidative activity. Inorganica Chim Acta 2019; 485:155-161. [PMID: 30988551 PMCID: PMC6461407 DOI: 10.1016/j.ica.2018.10.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Investigations of small molecule copper-dioxygen chemistry can and have provided fundamental insights into enzymatic processes (e.g., copper metalloenzyme dioxygen binding geometries and their associated spectroscopy and substrate reactivity). Strategically designing copper-binding ligands has allowed for insight into properties that favor specific (di)copper-dioxygen species. Herein, the tetradentate tripodal TMPA-based ligand (TMPA = tris((2-pyridyl)methyl)amine) possessing a methoxy moiety in the 6-pyridyl position on one arm (OCH3TMPA) was investigated. This system allows for a trigonal bipyramidal copper(II) geometry as shown by the UV-vis and EPR spectra of the cupric complex [(OCH3TMPA)CuII(OH2)](ClO4)2. Cyclic voltammetry experiments determined the reduction potential of this copper(II) species to be -0.35 V vs. Fc+/0 in acetonitrile, similar to other TMPA-derivatives bearing sterically bulky 6-pyridyl substituents. The copper-dioxygen reactivity is also analogous to these TMPA-derivatives, affording a bis-μ-oxo dicopper(III) complex, [{(OCH3TMPA)CuIII}2(O2-)2]2+, upon oxygenation of the copper(I) complex [(OCH3TMPA)CuI](B(C6F5)4) at cryogenic temperatures in 2-methyltetrahydrofuran. This highly reactive intermediate is capable of oxidizing phenolic substrates through a net hydrogen atom abstraction. However, after bubbling of the precursor copper(I) complex with dioxygen at very low temperatures (-135 °C), a cupric superoxide species, [(OCH3TMPA)CuII(O2 •-)]+, is initially formed before slowly converting to [{(OCH3TMPA)CuIII}2(O2-)2]2+. This appears to be the first instance of the direct conversion of a cupric superoxide to a bis-μ-oxo dicopper(III) species in copper(I)-dioxygen chemistry.
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Affiliation(s)
- David A. Quist
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Melanie A. Ehudin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Kenneth D. Karlin
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
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25
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Huang R, Cao C, Liu J, Sun D, Song W. N-Doped carbon nanofibers derived from bacterial cellulose as an excellent metal-free catalyst for selective oxidation of arylalkanes. Chem Commun (Camb) 2019; 55:1935-1938. [DOI: 10.1039/c9cc00185a] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
N-Doped carbon nanofibers derived from one-step pyrolysis of low-cost bacterial cellulose with the assistance of urea were an excellent metal-free carbocatalyst for selective oxidation of arylalkanes.
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Affiliation(s)
- Runkun Huang
- Beijing National Laboratory for Molecular Sciences
- Laboratory of Molecular Nanostructures and Nanotechnology
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Changyan Cao
- Beijing National Laboratory for Molecular Sciences
- Laboratory of Molecular Nanostructures and Nanotechnology
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Jian Liu
- Beijing National Laboratory for Molecular Sciences
- Laboratory of Molecular Nanostructures and Nanotechnology
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
| | - Dongping Sun
- Institute of Chemicobiology and Functional Materials
- Nanjing University of Science and Technology
- Nanjing
- P. R. China
| | - Weiguo Song
- Beijing National Laboratory for Molecular Sciences
- Laboratory of Molecular Nanostructures and Nanotechnology
- CAS Research/Education Center for Excellence in Molecular Sciences
- Institute of Chemistry
- Chinese Academy of Sciences
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26
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Isaac JA, Thibon-Pourret A, Durand A, Philouze C, Le Poul N, Belle C. High-valence CuIICuIII species in action: demonstration of aliphatic C–H bond activation at room temperature. Chem Commun (Camb) 2019; 55:12711-12714. [DOI: 10.1039/c9cc04422a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electrochemically generated CuIICuIII mixed-valence species promotes activation of strong aliphatic C–H bonds (i.e. toluene), turning from stoichiometric to catalytic upon addition of a base.
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Affiliation(s)
| | | | - Amélie Durand
- Université Grenoble Alpes
- CNRS
- ICMG
- 38000 Grenoble
- France
| | | | - Nicolas Le Poul
- Université de Bretagne Occidentale
- CNRS UMR 6521
- 29238 Brest
- France
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27
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Gao WC, Cheng YF, Shang YZ, Chang HH, Li X, Zhou R, Qiao Y, Wei WL. Copper(II)-Catalyzed Four-Component Oxysulfonylation/Diazenylation: Synthesis of α-Arylhydrazo-β-keto Sulfones. J Org Chem 2018; 83:11956-11962. [DOI: 10.1021/acs.joc.8b01843] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Wen-Chao Gao
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Yu-Fei Cheng
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Yu-Zhu Shang
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Hong-Hong Chang
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Xing Li
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Rong Zhou
- College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, P. R. China
| | - Yan Qiao
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
| | - Wen-Long Wei
- State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P. R. China
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28
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Busa AV, Lalancette R, Nordlander E, Onani M. New copper(II) salicylaldimine derivatives for mild oxidation of cyclohexane. J CHEM SCI 2018. [DOI: 10.1007/s12039-018-1455-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Cook BJ, Di Francesco GN, Kieber-Emmons MT, Murray LJ. A Tricopper(I) Complex Competent for O Atom Transfer, C–H Bond Activation, and Multiple O2 Activation Steps. Inorg Chem 2018; 57:11361-11368. [DOI: 10.1021/acs.inorgchem.8b00921] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Brian J. Cook
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | - Gianna N. Di Francesco
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
| | | | - Leslie J. Murray
- Center for Catalysis and Florida Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200, United States
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30
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Suseelan AS, Varghese B, Edamana P, Murthy NN. Reagent‐Regulated Oxidative
O
‐Demethylation of a Ferrous Complex Stabilized by a Tetradentate N Ligand with a Methoxyphenyl Substituent. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201700946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Babu Varghese
- Sophisticated Analytical Instruments Facility (SAIF) IIT Madras 600036 Chennai India
| | - Prasad Edamana
- Sophisticated Analytical Instruments Facility (SAIF) IIT Madras 600036 Chennai India
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31
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Asahi M, Yamazaki SI, Morimoto Y, Itoh S, Ioroi T. Crystal structure and oxygen reduction reaction (ORR) activity of copper(II) complexes of pyridylmethylamine ligands containing a carboxy group. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.10.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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32
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Ho WC, Chung K, Ingram AJ, Waymouth RM. Pd-Catalyzed Aerobic Oxidation Reactions: Strategies To Increase Catalyst Lifetimes. J Am Chem Soc 2018; 140:748-757. [PMID: 29244945 DOI: 10.1021/jacs.7b11372] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The palladium complex [(neocuproine)Pd(μ-OAc)]2[OTf]2 (1, neocuproine = 2,9-dimethyl-1,10-phenanthroline) is an effective catalyst precursor for the selective oxidation of primary and secondary alcohols, vicinal diols, polyols, and carbohydrates. Both air and benzoquinone can be used as terminal oxidants, but aerobic oxidations are accompanied by oxidative degradation of the neocuproine ligand, thus necessitating high Pd loadings. Several strategies to improve aerobic catalyst lifetimes were devised, guided by mechanistic studies of catalyst deactivation. These studies implicate a radical autoxidation mechanism initiated by H atom abstraction from the neocuproine ligand. Ligand modifications designed to retard H atom abstractions as well as the addition of sacrificial H atom donors increase catalyst lifetimes and lead to higher turnover numbers (TON) under aerobic conditions. Additional investigations revealed that the addition of benzylic hydroperoxides or styrene leads to significant increases in TON as well. Mechanistic studies suggest that benzylic hydroperoxides function as H atom donors and that styrene is effective at intercepting Pd hydrides. These strategies enabled the selective aerobic oxidation of polyols on preparative scales using as little as 0.25 mol % of Pd, a major improvement over previous work.
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Affiliation(s)
- Wilson C Ho
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | - Kevin Chung
- Department of Chemistry, Stanford University , Stanford, California 94305, United States.,Formosa Plastics Corporation , 201 Formosa Drive, Point Comfort, Texas 77978, United States
| | - Andrew J Ingram
- Department of Chemistry, Stanford University , Stanford, California 94305, United States.,James R. Randall Research Center, Archer Daniels Midland Company , Decatur, Illinois 62521, United States
| | - Robert M Waymouth
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
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33
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Li ST, Braun-Cula B, Hoof S, Limberg C. Copper(i) complexes based on ligand systems with two different binding sites: synthesis, structures and reaction with O 2. Dalton Trans 2018; 47:544-560. [PMID: 29239430 DOI: 10.1039/c7dt03752j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis of the ligand systems L1 and L2 with two different N3-binding sites linked through a dibenzofuran spacer and their coordination properties towards a variety of CuI precursors are reported. The reaction of L1 with copper halides leads to the formation of a bimetallic species [(L1)(CuICl)2] (1), and metallodimers [((L1)(CuIX)2)2(μ-(Cu)(μ-X)2)] (2: X = Br, 3: X = I) in which two dicopper complexes are bridged by a (μ-(Cu)(μ-X)2)-moiety whereas L2 reacts with copper chloride to afford {[Cu(L2)Cl2]}n (8). Furthermore, starting from L1 in combination with copper(i) salts of weakly coordinating anions the dicopper complexes [(L1)(CuI(NCCH3))2](BF4)2 (4), [(L1)(CuI(NCCH3))(Cu(Y))](Y) (5: Y = OTf, 6: Y = ClO4) and [(L1)(Cu(dppe))](PF6)2 (7) were isolated, and employing L2, the complexes [(L2)(CuI(NCCH3))2](Z)2 (9: Z = PF6, 10: Z = OTf) and [(L2)(Cu(dppe))](PF6)2 (11) were obtained. Complexes 4-6 as well as 9 and 10 react rapidly with O2 to form metastable O2 adducts in acetone at -90 °C, where O2 is bound between the two copper centers within one dicopper molecule, as evidenced by UV/Vis spectroscopy, kinetic investigations, Raman spectroscopy and studies with ligands containing the isolated donor sites. The reactivity of the O2 adducts towards selected substrates was also investigated, showing their ability to act as electrophiles as well as nucleophiles.
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Affiliation(s)
- S T Li
- Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Str. 2, 12489 Berlin, Germany.
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34
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Haldar S, Vijaykumar G, Carrella L, Musie GT, Bera M. Structure and properties of a novel staircase-like decanuclear [CuII10] cluster supported by carbonate and carboxylate bridges. NEW J CHEM 2018. [DOI: 10.1039/c7nj03714g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
A novel staircase-like decanuclear copper(ii) cluster composed of a pair of [CuII5] pentameric units that are linked together exclusively by two μ2:η2:η1carbonate ligands is reported. The cluster also shows a rare μ3:η2:η1:η1bridging coordination mode of benzoate groups of the ligand.
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Affiliation(s)
| | - Gonela Vijaykumar
- Department of Chemical Sciences
- Indian Institute of Science Education & Research Kolkata
- Mohanpur
- India
| | - Luca Carrella
- Institut fur Anorganische Chemie und Analytische Chemie
- Johannes-Gutenberg Universität Mainz
- D-55128 Mainz
- Germany
| | - Ghezai T. Musie
- Department of Chemistry
- The University of Texas at San Antonio
- San Antonio
- USA
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35
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Zelenay B, Besora M, Monasterio Z, Ventura-Espinosa D, White AJP, Maseras F, Díez-González S. Copper-mediated reduction of azides under seemingly oxidising conditions: catalytic and computational studies. Catal Sci Technol 2018. [DOI: 10.1039/c8cy00515j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The reduction of aryl azides in the presence of water and air and without an obvious reducing agent is reported.
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Affiliation(s)
- Benjamin Zelenay
- Department of Chemistry
- Imperial College London
- SW7 2AZ London
- UK
- Institute of Chemical Research of Catalonia (ICIQ)
| | - Maria Besora
- Institute of Chemical Research of Catalonia (ICIQ)
- The Barcelona Institute of Science and Technology
- 43007 Tarragona
- Spain
| | | | | | | | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ)
- The Barcelona Institute of Science and Technology
- 43007 Tarragona
- Spain
- Departament de Química
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36
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Stumpf TDJ, Steinbach M, Würtele C, Becker J, Becker S, Fröhlich R, Göttlich R, Schindler S. Reactivity of Copper Complexes with Bis(piperidinyl)methane and Bis(quinolinyl)methane Ligands. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700755] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Tim-Daniel J. Stumpf
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Manfred Steinbach
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Christian Würtele
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Jonathan Becker
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Sabine Becker
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Roland Fröhlich
- Institute for Organic Chemistry; WWU Münster; Corrensstraße 40 48149 Münster Germany
| | - Richard Göttlich
- Institute for Organic Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
| | - Siegfried Schindler
- Institute for Inorganic and Analytical Chemistry; Justus-Liebig-University Gießen; Heinrich-Buff-Ring 17 35392 Gießen Germany
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37
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Sutradhar M, Alegria EC, Roy Barman T, Scorcelletti F, Guedes da Silva MFC, Pombeiro AJ. Microwave-assisted peroxidative oxidation of toluene and 1-phenylethanol with monomeric keto and polymeric enol aroylhydrazone Cu(II) complexes. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.07.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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38
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Li T, Fu C, Ma Q, Sang Z, Yang Y, Yang H, Lv R, Li B. Cobalt/Copper-Cocatalyzed Synthesis of Imidazo[1,2-a:3,4-a′]dipyridiniums from 2H-[1,2′-Bipyridin]-2-ones and 2-Bromoacetophenones. J Org Chem 2017; 82:10263-10270. [DOI: 10.1021/acs.joc.7b01742] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ting Li
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
| | - Chen Fu
- College
of Pharmaceutical Sciences, Southwest University, Chongqing 400715, P. R. China
| | - Qinge Ma
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
| | - Zhipei Sang
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
| | - Yuhan Yang
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
| | - Hao Yang
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
| | - Rongrong Lv
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
| | - Bo Li
- College
of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang, Henan 473061, P. R. China
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39
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Meury M, Knop M, Seebeck FP. Structural Basis for Copper-Oxygen Mediated C−H Bond Activation by the Formylglycine-Generating Enzyme. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702901] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Marcel Meury
- Department for Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| | - Matthias Knop
- Department for Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| | - Florian P. Seebeck
- Department for Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
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40
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Meury M, Knop M, Seebeck FP. Structural Basis for Copper-Oxygen Mediated C−H Bond Activation by the Formylglycine-Generating Enzyme. Angew Chem Int Ed Engl 2017; 56:8115-8119. [DOI: 10.1002/anie.201702901] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Indexed: 12/21/2022]
Affiliation(s)
- Marcel Meury
- Department for Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| | - Matthias Knop
- Department for Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
| | - Florian P. Seebeck
- Department for Chemistry; University of Basel; St. Johanns-Ring 19 4056 Basel Switzerland
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41
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Anjana SS, Varghese B, Prasad E. Dinuclear cobalt(II) complexes with double phosphate ester bridges and tetradentate ligands having anisole or quinoline appendages. Acta Crystallogr C 2017; 73:492-497. [DOI: 10.1107/s2053229617007355] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 05/17/2017] [Indexed: 11/11/2022] Open
Abstract
Phosphate esters provide a rigid and stable polymeric backbone in nucleic acids. Metal complexes with phosphate ester groups have been synthesized as structural and spectroscopic models of phosphate-containing enzymes. Dinucleating ligands are used extensively to synthesize model complexes since they provide the support required to stabilize such complexes. The crystal structures of two dinuclear CoII complexes, namely bis(μ-diphenyl phosphato-κ2
O:O′)bis({2-methoxy-N,N-bis[(pyridin-2-yl)methyl]aniline-κ4
N,N′,N′′,O}cobalt(II)) bis(perchlorate), [Co(C12H10O4P)2(C19H19N3O)2](ClO4)2, and bis(μ-diphenyl phosphato-κ2
O:O′)bis({N,N-bis[(pyridin-2-yl)methyl]quinolin-8-amine-κ4
N,N′,N′′,O}cobalt(II)) bis(perchlorate), [Co(C12H10O4P)2(C21H18N4)2](ClO4)2, with tetradentate 2-methoxy-N,N-bis[(pyridin-2-yl)methyl]aniline (L
1) and N,N-bis[(pyridin-2-yl)methyl]quinolin-8-amine (L
2) ligands are reported. The complexes have similar structures, with distorted octahedral geometries around the metal centres. Both are centrosymmetric (Z′ = 0.5), with the CoII centres doubly bridged by diphenyl phosphate ester groups. A number of aromatic–aromatic interactions are present and differ between the two complexes as the anisole group in L
1 is replaced by a quinoline group in L
2. A detailed study of these interactions is presented.
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42
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Tsuji T, Zaoputra AA, Hitomi Y, Mieda K, Ogura T, Shiota Y, Yoshizawa K, Sato H, Kodera M. Specific Enhancement of Catalytic Activity by a Dicopper Core: Selective Hydroxylation of Benzene to Phenol with Hydrogen Peroxide. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702291] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tomokazu Tsuji
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
| | - Antonius Andre Zaoputra
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
| | - Yutaka Hitomi
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
| | - Kaoru Mieda
- Department of Life Science University of Hyogo Kouto, 2-1, Ako-gun Kamigori-cho Hyogo 678-1297 Japan
| | - Takashi Ogura
- Department of Life Science University of Hyogo Kouto, 2-1, Ako-gun Kamigori-cho Hyogo 678-1297 Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering Kyushu University Fukuoka 819-0395 Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering Kyushu University Fukuoka 819-0395 Japan
| | - Hiroyasu Sato
- Application Laboratory Rigaku Corporation, Akishima Tokyo 196-8666 Japan
| | - Masahito Kodera
- Department of Molecular Chemistry and Biochemistry Doshisha University, Kyotanabe Kyoto 610-0321 Japan
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43
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Tsuji T, Zaoputra AA, Hitomi Y, Mieda K, Ogura T, Shiota Y, Yoshizawa K, Sato H, Kodera M. Specific Enhancement of Catalytic Activity by a Dicopper Core: Selective Hydroxylation of Benzene to Phenol with Hydrogen Peroxide. Angew Chem Int Ed Engl 2017; 56:7779-7782. [PMID: 28561921 DOI: 10.1002/anie.201702291] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 03/30/2017] [Indexed: 11/11/2022]
Abstract
A dicopper(II) complex, stabilized by the bis(tpa) ligand 1,2-bis[2-[bis(2-pyridylmethyl)aminomethyl]-6-pyridyl]ethane (6-hpa), [Cu2 (μ-OH)(6-hpa)]3+ , was synthesized and structurally characterized. This complex catalyzed selective hydroxylation of benzene to phenol using H2 O2 , thus attaining large turnover numbers (TONs) and high H2 O2 efficiency. The TON after 40 hours for the phenol production exceeded 12000 in MeCN at 50 °C under N2 , the highest value reported for benzene hydroxylation with H2 O2 catalyzed by homogeneous complexes. At 22 % benzene conversion, phenol (95.2 %) and p-benzoquinone (4.8 %) were produced. The mechanism of H2 O2 activation and benzene hydroxylation is proposed.
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Affiliation(s)
- Tomokazu Tsuji
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Antonius Andre Zaoputra
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Yutaka Hitomi
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
| | - Kaoru Mieda
- Department of Life Science, University of Hyogo, Kouto, 2-1, Ako-gun, Kamigori-cho, Hyogo, 678-1297, Japan
| | - Takashi Ogura
- Department of Life Science, University of Hyogo, Kouto, 2-1, Ako-gun, Kamigori-cho, Hyogo, 678-1297, Japan
| | - Yoshihito Shiota
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kazunari Yoshizawa
- Institute for Materials Chemistry and Engineering, Kyushu University, Fukuoka, 819-0395, Japan
| | - Hiroyasu Sato
- Application Laboratory, Rigaku Corporation, Akishima, Tokyo, 196-8666, Japan
| | - Masahito Kodera
- Department of Molecular Chemistry and Biochemistry, Doshisha University, Kyotanabe, Kyoto, 610-0321, Japan
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44
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Elwell CE, Gagnon NL, Neisen BD, Dhar D, Spaeth AD, Yee GM, Tolman WB. Copper-Oxygen Complexes Revisited: Structures, Spectroscopy, and Reactivity. Chem Rev 2017; 117:2059-2107. [PMID: 28103018 PMCID: PMC5963733 DOI: 10.1021/acs.chemrev.6b00636] [Citation(s) in RCA: 445] [Impact Index Per Article: 63.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A longstanding research goal has been to understand the nature and role of copper-oxygen intermediates within copper-containing enzymes and abiological catalysts. Synthetic chemistry has played a pivotal role in highlighting the viability of proposed intermediates and expanding the library of known copper-oxygen cores. In addition to the number of new complexes that have been synthesized since the previous reviews on this topic in this journal (Mirica, L. M.; Ottenwaelder, X.; Stack, T. D. P. Chem. Rev. 2004, 104, 1013-1046 and Lewis, E. A.; Tolman, W. B. Chem. Rev. 2004, 104, 1047-1076), the field has seen significant expansion in the (1) range of cores synthesized and characterized, (2) amount of mechanistic work performed, particularly in the area of organic substrate oxidation, and (3) use of computational methods for both the corroboration and prediction of proposed intermediates. The scope of this review has been limited to well-characterized examples of copper-oxygen species but seeks to provide a thorough picture of the spectroscopic characteristics and reactivity trends of the copper-oxygen cores discussed.
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Affiliation(s)
- Courtney E Elwell
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Nicole L Gagnon
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Benjamin D Neisen
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Debanjan Dhar
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Andrew D Spaeth
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - Gereon M Yee
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
| | - William B Tolman
- Department of Chemistry, Center for Metals in Biocatalysis, University of Minnesota , 207 Pleasant St. SE, Minneapolis, Minnesota 55455, United States
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45
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Liu H, Wang M, Li H, Luo N, Xu S, Wang F. New protocol of copper-catalyzed oxidative C(CO) C bond cleavage of aryl and aliphatic ketones to organic acids using O2 as the terminal oxidant. J Catal 2017. [DOI: 10.1016/j.jcat.2016.12.016] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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46
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Wang Y, Liu H, Zhang X, Zhang Z, Huang D. Experimental and mechanistic insights into copper(ii)–dioxygen catalyzed oxidative N-dealkylation of N-(2-pyridylmethyl)phenylamine and its derivatives. Org Biomol Chem 2017; 15:9164-9168. [DOI: 10.1039/c7ob02192e] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
An efficient Cu(ii)/O2 catalytic system was experimentally explored for the N-dealkylation of PyCH2NHPh and its derivatives via C–H bond activation.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Haixiong Liu
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Xiaofeng Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Zilong Zhang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
| | - Deguang Huang
- State Key Laboratory of Structural Chemistry
- Fujian Institute of Research on the Structure of Matter
- Chinese Academy of Sciences
- Fuzhou
- China
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47
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Genovino J, Sames D, Hamann LG, Touré BB. Die Erschließung von Wirkstoffmetaboliten durch übergangsmetallkatalysierte C-H-Oxidation: die Leber als Inspiration für die Synthese. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602644] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Julien Genovino
- Pfizer Inc.; Worldwide Medicinal Chemistry, Cardiovascular, Metabolic, and Endocrine Diseases (CVMED); 558 Eastern Point Road Groton CT 06340 USA
| | - Dalibor Sames
- Columbia University; Department of Chemistry and Neurotechnology Center; 3000 Broadway MC3101 New York NY 10027 USA
| | - Lawrence G. Hamann
- Novartis Institutes for Biomedical Sciences (NIBR), Global Discovery Chemistry (GDC); 181 Massachusetts Avenue Cambridge MA 02139 USA
| | - B. Barry Touré
- Novartis Institutes for Biomedical Sciences (NIBR), Global Discovery Chemistry (GDC); 100 Technology Square Cambridge MA 02139 USA
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48
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Genovino J, Sames D, Hamann LG, Touré BB. Accessing Drug Metabolites via Transition-Metal Catalyzed C-H Oxidation: The Liver as Synthetic Inspiration. Angew Chem Int Ed Engl 2016; 55:14218-14238. [PMID: 27723189 DOI: 10.1002/anie.201602644] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 06/08/2016] [Indexed: 11/07/2022]
Abstract
Can classical and modern chemical C-H oxidation reactions complement biotransformation in the synthesis of drug metabolites? We have surveyed the literature in an effort to try to answer this important question of major practical significance in the pharmaceutical industry. Drug metabolites are required throughout all phases of the drug discovery and development process; however, their synthesis is still an unsolved problem. This Review, not intended to be comprehensive or historical, highlights relevant applications of chemical C-H oxidation reactions, electrochemistry and microfluidic technologies to drug templates in order to access drug metabolites, and also highlights promising reactions to this end. Where possible or appropriate, the contrast with biotransformation is drawn. In doing so, we have tried to identify gaps where they exist in the hope to spur further activity in this very important research area.
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Affiliation(s)
- Julien Genovino
- Pfizer Inc., Worldwide Medicinal Chemistry, Cardiovascular, Metabolic, and Endocrine Diseases (CVMED), 558 Eastern Point Road, Groton, CT, 06340, USA
| | - Dalibor Sames
- Columbia University, Department of Chemistry and Neurotechnology Center, 3000 Broadway MC3101, New York, NY, 10027, USA
| | - Lawrence G Hamann
- Novartis Institutes for Biomedical Sciences (NIBR), Global Discovery Chemistry (GDC), 181 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - B Barry Touré
- Novartis Institutes for Biomedical Sciences (NIBR), Global Discovery Chemistry (GDC), 100 Technology Square, Cambridge, MA, 02139, USA.
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49
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Li ST, Braun-Cula B, Hoof S, Dürr M, Ivanović-Burmazović I, Limberg C. Ligands with Two Different Binding Sites and O2Reactivity of their Copper(I) Complexes. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600420] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sin Ting Li
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Beatrice Braun-Cula
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Santina Hoof
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Germany
| | - Maximilian Dürr
- Universität Erlangen-Nürnberg; Lehrstuhl für Bioanorganische Chemie; Egerlandstraße 1 91058 Erlangen Germany
| | - Ivana Ivanović-Burmazović
- Universität Erlangen-Nürnberg; Lehrstuhl für Bioanorganische Chemie; Egerlandstraße 1 91058 Erlangen Germany
| | - Christian Limberg
- Institut für Chemie; Humboldt-Universität zu Berlin; Brook-Taylor-Str. 2 12489 Berlin Germany
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50
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Synthesis and mechanism study of a dimeric tetranuclear carbonate-bridged copper(II) complex resulting from CO2 fixation by controlling O2 concentration. INORG CHEM COMMUN 2016. [DOI: 10.1016/j.inoche.2016.03.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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