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Sharma M, Perkins AM, Awoyemi RF, Schmittou AN, Raju S, Pierce BS, Donnadieu B, Wipf DO, Stokes SL, Emerson JP. Three water-soluble copper(II) N-heterocyclic carbene complexes: toward copper-catalyzed ketone reduction under sustainable conditions. Dalton Trans 2024. [PMID: 38247368 DOI: 10.1039/d3dt03406b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
A series of tridentate copper(II) N-heterocyclic carbene (NHC) complexes with imidazole, benzimidazole, and 5,6-dimethylbenzimidazole azole rings were synthesized and comprehensively characterized via X-ray crystallography, ESI-MS, cyclic voltammetry, and UV-Vis and EPR spectroscopic studies. These complexes were then utilized for the optimization of ketone reduction under sustainable conditions using 2-acetylpyridine and phenylsilane. The relationships between product formation, temperature, reaction time, and catalyst loading for the hydrogenation reactions are covered in detail. Reduction of eighteen different aliphatic, cyclic, and aromatic ketones were demonstrated, which were compatible to produce the corresponding products in moderate to good yields. These systems were used to develop related DNA-hybrid catalytic systems, but only supported weak enantioselectivity. Further thermodynamic experiments showed Cu-NHC complexes did not demonstrate specific binding to DNA, which is consistent with their limited selectivity.
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Affiliation(s)
- Mitu Sharma
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - Amanda M Perkins
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - Raymond Femi Awoyemi
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - Allison N Schmittou
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, AL, USA
| | - Selvam Raju
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - Brad S Pierce
- Department of Chemistry and Biochemistry, University of Alabama, Tuscaloosa, AL, USA
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - David O Wipf
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - Sean L Stokes
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
| | - Joseph P Emerson
- Department of Chemistry, Mississippi State University, Mississippi State, MS, USA.
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Sharma M, Adhikari B, Awoyemi RF, Perkins AM, Duckworth AK, Donnadieu B, Wipf DO, Stokes SL, Emerson JP. Copper(II) NHC Catalyst for the Formation of Phenol from Arylboronic Acid. CHEMISTRY (BASEL, SWITZERLAND) 2022; 4:560-575. [PMID: 38031556 PMCID: PMC10686634 DOI: 10.3390/chemistry4020040] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2023]
Abstract
Arylboronic acids are commonly used in modern organic chemistry to form new C-C and C-heteroatom bonds. These activated organic synthons show reactivity with heteroatoms in a range of substrates under ambient oxidative conditions. This broad reactivity has limited their use in protic, renewable solvents like water, ethanol, and methanol. Here, we report our efforts to study and optimize the activation of arylboronic acids by a copper(II) N-heterocyclic carbene (NHC) complex in aqueous solution and in a range of alcohols to generate phenol and aryl ethers, respectively. The optimized reactivity showcases the ability to make targeted C-O bonds, but also identifies conditions where water and alcohol activation could be limiting for C-C and C-heteroatom bond-forming reactions. This copper(II) complex shows strong reactivity toward arylboronic acid activation in aqueous medium at ambient temperature. The relationship between product formation and temperature and catalyst loading are described. Additionally, the effects of buffer, pH, base, and co-solvent are explored with respect to phenol and ether generation reactions. Characterization of the new copper(II) NCN-pincer complex by X-ray crystallography, HR-MS, cyclic voltammetry, FT-IR and UV-Vis spectral studies is reported.
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Affiliation(s)
- Mitu Sharma
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Bhupendra Adhikari
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Raymond Femi Awoyemi
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Amanda M. Perkins
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Alison K. Duckworth
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Bruno Donnadieu
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - David O. Wipf
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Sean L. Stokes
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
| | - Joseph P. Emerson
- Department of Chemistry, Mississippi State University, Mississippi State, MS 39762-9573, USA
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Vu T, Nguyen M, Do T, Nguyen LH, Nguyen VA, Nguyen DT. Adsorption of copper ions onto poly(1,8‐diaminonaphthalene)/graphene film for voltammetric determination of pyridoxine. ELECTROANAL 2022. [DOI: 10.1002/elan.202100643] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Trong Vu
- Hanoi University of Science and Technology VIET NAM
| | - Mai Nguyen
- Hanoi University of Science and Technology VIET NAM
| | - Thuy Do
- Institute of Chemistry and Materials VIET NAM
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Ye Q, Xu H, Wang Q, Huo X, Wang Y, Huang X, Zhou G, Lu J, Zhang J. New insights into the mechanisms of tartaric acid enhancing homogeneous and heterogeneous copper-catalyzed Fenton-like systems. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124351. [PMID: 33144019 DOI: 10.1016/j.jhazmat.2020.124351] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/04/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
The specific roles of tartaric acid (TA), as an eco-friendly ligand, in homogeneous and heterogeneous copper-catalyzed systems were systematically revealed and new mechanisms of TA enhancing the three Fenton-like processes were proposed to provide a theoretical significance in overcoming the deficiency of conventional Fenton processes. The results identified hydroxyl radical (•OH) as the main species responsible for the simultaneous decomposition of TA and metronidazole (MNZ) according to TOC removal. The ESR technique was used to detect superoxide radicals (•O2-), carbon-centered radical (•R) and hydrogen radical (•H) in the Cu2+/TA/H2O2 system, which contributed to the acceleration of the Cu2+/Cu+ redox cycle. The enhancing effect of TA on the homogeneous process was ascribed to the formation of a soluble complex with Cu2+, which favored the pH range extension, Cu+ oxidation, and radical generation. Moreover, the adsorption of TA on the catalysts surface promoted the consumption of H2O2, inducing •OH generation. The formed surface complex (≡Cu2+-TA) also accelerated the regeneration of ≡Cu+, which was confirmed by density functional theory (DFT) calculation and surface characterization analysis (SEM, XRD, and XPS). The possible degradation pathways of MNZ in TA-modified Fenton-like system were also clarified.
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Affiliation(s)
- Qian Ye
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Hao Xu
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Qingguo Wang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Xiaowei Huo
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Yunqi Wang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Xue Huang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Guanyu Zhou
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Jinfeng Lu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Jing Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China.
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Cope JD, Sheridan PE, Galloway CJ, Awoyemi RF, Stokes SL, Emerson JP. Synthesis and Characterization of a Tetradentate, N-Heterocyclic Carbene Copper(II) Complex and Its Use as a Chan–Evans–Lam Coupling Catalyst. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00552] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- James D. Cope
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Patrick E. Sheridan
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Christopher J. Galloway
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Raymond Femi Awoyemi
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Sean L. Stokes
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Joseph P. Emerson
- Department of Chemistry, Mississippi State University, Mississippi State, Mississippi 39762, United States
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Maiti M, Sadhukhan D, Thakurta S, Sen S, Zangrando E, Butcher RJ, Deka RC, Mitra S. Pseudohalide‐Controlled Assemblies of Copper–Schiff Base Complexes with an Encapsulated Sodium Ion: Synthesis, Crystal Structure, and Computational Studies. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200916] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Monami Maiti
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Kolkata 700032, India, Fax: +91‐33‐2414‐6414, http://www.jaduniv.edu.in/profile.php?uid = 19
| | - Dipali Sadhukhan
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Kolkata 700032, India, Fax: +91‐33‐2414‐6414, http://www.jaduniv.edu.in/profile.php?uid = 19
| | - Santarupa Thakurta
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Kolkata 700032, India, Fax: +91‐33‐2414‐6414, http://www.jaduniv.edu.in/profile.php?uid = 19
| | - Shubhatam Sen
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Kolkata 700032, India, Fax: +91‐33‐2414‐6414, http://www.jaduniv.edu.in/profile.php?uid = 19
| | - Ennio Zangrando
- Department of Chemical and Pharmaceutical Sciences, Via Licio Giorgieri 1, 34127 Trieste, Italy
| | - Ray J. Butcher
- Department of Chemistry, Howard University, 2400 Sixth Street NW, Washington, DC 20059, USA
| | - Ramesh C. Deka
- Department of Chemical Sciences, Tezpur University, Tezpur 784028, Assam, India
| | - Samiran Mitra
- Department of Chemistry, Jadavpur University, Raja S. C. Mullick Road, Kolkata 700032, India, Fax: +91‐33‐2414‐6414, http://www.jaduniv.edu.in/profile.php?uid = 19
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