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Abstract
Herein, we report the enantioselective total synthesis of dysiherbols A, C, and D, a unique group of 6/6/5/6/6 pentacyclic quinone/hydroquinone sesquiterpenes, featuring a photo-induced quinone-alkene [2 + 2] cycloaddition and a tandem [1,2]-anionic rearrangement/cyclopropane fragmentation as key elements. Based on our total synthesis, the originally proposed structures of dysiherbols C and D have been revised. Detailed computational studies were carried out to gain deep insight into the unprecedented [1,2]-anionic rearrangement, which revealed that the transformation, albeit a symmetry-forbidden process, proceeded through a concerted manner owing to the release of high ring-strain energy and the evolution of local aromaticity in the transition state. Taking all, the present work offers a mechanistically interesting and synthetically useful approach to accessing dysiherbols and related congeners.
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Affiliation(s)
- Shengkun Hu
- Department of Chemistry, Tsinghua University, Beijing 100084, China
| | - Yefeng Tang
- School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, China
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2
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Nemakal M, Giddaerappa, Shantharaja, Sajjan VA, Koodlur Sannegowda L. Novel amide coupled phthalocyanines: Synthesis and structure-property relationship for electrocatalysis and sensing of hydroquinone. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115657] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Aidoudi FH, Sinopoli A, Arunachalam M, Merzougui B, Aïssa B. Synthesis and Characterization of a Novel Hydroquinone Sulfonate-Based Redox Active Ionic Liquid. MATERIALS 2021; 14:ma14123259. [PMID: 34204769 PMCID: PMC8231554 DOI: 10.3390/ma14123259] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/08/2021] [Accepted: 06/09/2021] [Indexed: 11/22/2022]
Abstract
Introducing redox-active moieties into an ionic liquid (IL) structure is an exciting and attractive approach that has received increasing interest over recent years for a various range of energy applications. The so-called redox-active ionic liquids (RAILs) provide a highly versatile platform to potentially create multifunctional electroactive materials. Ionic liquids are molten salts consisting of ionic species, often having a melting point lower than 100 °C. Such liquids are obtained by combining a bulky asymmetric organic cation and a small anion. Here, we report on the synthesis of a novel RAIL, namely 1-butyl-3-methylimidazolium hydroquinone sulfonate ((BMIM)(HQS)). (BMIM)(HQS) was synthesized in a two-step procedure, starting by the quaternization of methylimidazole using butylchloride to produce 1-butyl-3-methylimidazolium chloride ((BMIM)(Cl)), and followed by the anion exchange reaction, where the chloride anion is exchanged with hydroquinone sulfonate. The resulting product was characterized by 1H NMR, 13C NMR, FT-IR spectroscopy, themogravimetric analysis, and differential scanning calorimetry, and shows a high stability up to 340 °C. Its electrochemical behavior was investigated using cyclic voltammetry at different temperatures and its viscosity analysis was also performed at variable temperatures. The electrochemical response of the presented RAIL was found to be temperature dependent and diffusion controlled. Overall, our results demonstrated that (BMIM)(mix of HQS and HSQ) is redox active and possesses high stability and low volatility, leading to the employment of this RAIL without any additional supporting electrolyte or additives.
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Enhancing the understanding of the redox properties of lithium-inserted anthraquinone derivatives by regulating molecular structure. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115172] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Méndez D, Donoso-Bustamante V, Pablo Millas-Vargas J, Pessoa-Mahana H, Araya-Maturana R, Fuentes E. Synthesis and pharmacological evaluation of acylhydroquinone derivatives as potent antiplatelet agents. Biochem Pharmacol 2020; 183:114341. [PMID: 33197432 DOI: 10.1016/j.bcp.2020.114341] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/06/2020] [Accepted: 11/09/2020] [Indexed: 12/20/2022]
Abstract
Platelets are the smallest blood cells, and their activation (platelet cohesion or aggregation) at sites of vascular injury is essential for thrombus formation. Since the use of antiplatelet therapy is an unsolved problem, there are now focused and innovative efforts to develop novel antiplatelet compounds. In this context, we assessed the antiplatelet effect of an acylhydroquinone series, synthesized by Fries rearrangement under microwave irradiation, evaluating the effect of diverse acyl chain lengths, their chlorinated derivatives, and their dimethylated derivatives both in the aromatic ring and also the effect of the introduction of a bromine atom at the terminus of the acyl chain. Findings from a primary screening of cytotoxic activity on platelets by lactate dehydrogenase assay identified 19 non-toxic compounds from the 27 acylhydroquinones evaluated. A large number of them showed IC50 values less than 10 µM acting against specific pathways of platelet aggregation. The highest activity was obtained with compound 38, it exhibited sub-micromolar IC50 of 0.98 ± 0.40, 1.10 ± 0.26, 3.98 ± 0.46, 6.79 ± 3.02 and 42.01 ± 3.48 µM against convulxin-, collagen-, TRAP-6-, PMA- and arachidonic acid-induced platelet aggregation, respectively. It also inhibited P-selectin and granulophysin expression. We demonstrated that the antiplatelet mechanism of compound 38 was through a decrease in a central target in human platelet activation as in mitochondrial function, and this could modulate a lower response of platelets to activating agonists. The results of this study show that the chemical space around ortho-carbonyl hydroquinone moiety is a rich source of biologically active compounds, signaling that the acylhydroquinone scaffold has a promising role in antiplatelet drug research.
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Affiliation(s)
- Diego Méndez
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | | | | | - Hernán Pessoa-Mahana
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Chile
| | | | - Eduardo Fuentes
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile.
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6
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Kramer CAC, da Silva ARL, de Carvalho LS. Influence of phenylpropanoid units of lignin and its oxidized derivatives on the stability and βO4 binding properties: DFT and QTAIM approach. Org Biomol Chem 2020; 18:5897-5905. [PMID: 32685944 DOI: 10.1039/d0ob01171a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Obtaining lignin products is currently one of the great challenges, mainly because of its stable and poorly reactive structure. This work used a DFT and QTAIM approach, seeking to understand the influence of lignin structure on the reactivity and βO4 binding properties of 18 model structures. The computational modeling used confirmed that lignins derived from more oxygenated monomers have a smaller HOMO-LUMO gap, and therefore are less stable. In the developed study, the replacement of alpha hydroxyl with a carbonyl was able to abruptly change the electron topology, reducing binding energy in βO4 indicating which SHOX model is more susceptible to breakage.
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Affiliation(s)
- Carlos Augusto Cabral Kramer
- Energy Technology Laboratory, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59075-000, Brazil.
| | - Amison Rick Lopes da Silva
- Theory Chemistry Group, Analytical Chemistry and Chemical Physics Department, Federal University of Ceará, Fortaleza, Ceará 60455-900, Brazil.
| | - Luciene Santos de Carvalho
- Energy Technology Laboratory, Institute of Chemistry, Federal University of Rio Grande do Norte, Natal, Rio Grande do Norte 59075-000, Brazil
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Patel BR, Noroozifar M, Kerman K. Prussian blue-doped nanosized polyaniline for electrochemical detection of benzenediol isomers. Anal Bioanal Chem 2020; 412:1769-1784. [PMID: 32043201 DOI: 10.1007/s00216-020-02400-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Revised: 12/17/2019] [Accepted: 01/09/2020] [Indexed: 12/14/2022]
Abstract
Simultaneous speciation of benzenediol isomers (BDIs), 1,2-benzenediol (catechol, CC), 1,3-benzenediol (resorcinol, RS), and 1,4-benzenediol (hydroquinone, HQ), was investigated by differential pulse voltammetry (DPV) using a graphite paste electrode (GPE) modified with Prussian blue-polyaniline nanocomposite. The modified GPE showed good stability, sensitivity, and selectivity properties for all the three BDIs. Prussian blue-doped nanosized polyaniline (PBNS-PANI) was synthesized first by using mechanochemical reactions between aniline and ferric chloride hexahydrate as the oxidants and then followed by the addition of potassium hexacyanoferrate(II) in a solid-state and template-free technique. The material was characterized by scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS). The DPV measurements are performed in phosphate electrolyte solution with pH 4.0 at a potential range of - 0.1 to 1.0 V. The proposed modified electrode displayed a strong, stable, and continuous three well-separated oxidation peaks towards electrooxidation at potentials 0.20, 0.31, and 0.76 V for HQ, CC, and RS, respectively. The calibration curves were linear from 1 to 350.5 μM for both HQ and CC, while for RS, it was from 2 to 350.5 μM. The limit of detection was determined to be 0.18, 0.01, and 0.02 μM for HQ, CC, and RS, respectively. The analytical performance of the PBNS-PANI/GPE has been evaluated for simultaneous determination of HQ, CC, and RS in creek water, commercial hair dye, and skin whitening cream samples with satisfactory recoveries between 90 and 106%. Overall, we demonstrated that the presence of NS-PANI and PB resulted in a large redox-active surface area that enabled a promising analytical platform for simultaneous detection of BDIs. Graphical abstract.
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Affiliation(s)
- Bhargav R Patel
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
| | - Meissam Noroozifar
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada
| | - Kagan Kerman
- Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, ON, M1C 1A4, Canada.
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Pavitt AS, Tratnyek PG. Electrochemical characterization of natural organic matter by direct voltammetry in an aprotic solvent. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2019; 21:1664-1683. [PMID: 31576393 DOI: 10.1039/c9em00313d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The complex and indeterminant composition of NOM makes characterization of its redox properties challenging. Approaches that have been taken to address this challenge include chemical probe reactions, potentiometric titrations, chronocoulometry, and voltammetry. In this study, we revisit the use of direct voltammetric methods in aprotic solvents by applying an expanded and refined suite of methods to a large set of NOM samples and model compounds (54 NOM samples from 10 different sources, 7 NOM model compounds, and 2 fresh extracts of plant materials that are high in redox-active quinonoid model compounds dissolved in DMSO). Refinements in the methods of fitting the data obtained by staircase cyclic voltammetry (SCV) provided improved definition of peaks, and square wave voltammetry (SWV), performed under the same conditions as SCV, provided even more reliable identification and quantitation of peaks. Further evidence is provided that DMSO improves the electrode response by unfolding some of the tertiary structure of NOM polymers, thereby allowing greater contact between redox active functional groups and the electrode surface. We averaged experimental peak potentials for all NOM compounds and calculated potentials in water. Average values for Epa1, Epc1, and Ep1 in DMSO were -0.866 ± 0.069, -1.35 ± 0.071, and -0.831 ± 0.051 V vs. Ag/Ag+, and -0.128, -0.613, and -0.0930 V vs. SHE in water. In addition to peak potentials, the breadth of SCV peaks was quantified as a way to characterize the degree to which the redox activity of NOM is due to a continuum of contributing functional groups. The average breadth values were 1.63 ± 0.24, 1.28 ± 0.34, and 0.648 ± 0.15 V for Epa1, Epc1, and Ep1 respectively. Comparative analysis of the overall dataset-from SCV and SWV on all NOMs and model compounds-revealed that NOM redox properties vary over a narrower range than expected based on model compound properties. This lack of diversity in redox properties of NOM is similar to conclusions from other recent work on the molecular structure of NOM, all of which could be the result of selectivity in the common extraction methods used to obtain the materials.
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Affiliation(s)
- Ania S Pavitt
- OHSU-PSU School of Public Health, Oregon Health & Science University, 3181 SW Sam Jackson Park Road, Portland, OR 97239, USA.
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9
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Daniluk M, Buchowicz W, Koszytkowska‐Stawińska M, Jarząbek K, Jarzembska KN, Kamiński R, Piszcz M, Laudy AE, Tyski S. Ferrocene Amino Acid Ester Uracil Conjugates: Synthesis, Structure, Electrochemistry and Antimicrobial Evaluation. ChemistrySelect 2019. [DOI: 10.1002/slct.201902518] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Maria Daniluk
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | - Włodzimierz Buchowicz
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | | | - Karolina Jarząbek
- King Władysław IV High School in Warsaw Jagiellońska 38 03-719 Warsaw Poland
| | | | - Radosław Kamiński
- Department of ChemistryUniversity of Warsaw Żwirki i Wigury 101 02-089 Warsaw Poland
| | - Michał Piszcz
- Faculty of ChemistryWarsaw University of Technology Noakowskiego 3 00-664 Warsaw Poland
| | - Agnieszka E. Laudy
- Department of Pharmaceutical MicrobiologyMedical University of Warsaw Żwirki i Wigury 61, Warsaw Poland
| | - Stefan Tyski
- Department of Pharmaceutical MicrobiologyMedical University of Warsaw Żwirki i Wigury 61, Warsaw Poland
- Department of Antibiotics and MicrobiologyNational Medicines Institute Chełmska 30/34 00-725 Warsaw Poland
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Baschieri A, Amorati R, Valgimigli L, Sambri L. 1-Methyl-1,4-cyclohexadiene as a Traceless Reducing Agent for the Synthesis of Catechols and Hydroquinones. J Org Chem 2019; 84:13655-13664. [DOI: 10.1021/acs.joc.9b01898] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Andrea Baschieri
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via S. Giacomo 11, 40126 Bologna, Italy
| | - Riccardo Amorati
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via S. Giacomo 11, 40126 Bologna, Italy
| | - Luca Valgimigli
- Dipartimento di Chimica “G. Ciamician”, Università di Bologna, Via S. Giacomo 11, 40126 Bologna, Italy
| | - Letizia Sambri
- Dipartimento di Chimica Industriale “T. Montanari”Università di Bologna, Viale Risorgimento 4, 40136 Bologna, Italy
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11
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Electrochemical Technologies for Detecting and Degrading Benzoquinone Using Diamond Films. ChemElectroChem 2019. [DOI: 10.1002/celc.201900541] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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12
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Wang J, Qian P, Hu K, Zha Z, Wang Z. Electrocatalytic Fixation of Carbon Dioxide with Amines and Arylketones. ChemElectroChem 2019. [DOI: 10.1002/celc.201801724] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiawei Wang
- Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials ScienceUniversity of Science and Technology of China Hefei Anhui China
| | - Peng Qian
- Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials ScienceUniversity of Science and Technology of China Hefei Anhui China
| | - Kangfei Hu
- Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials ScienceUniversity of Science and Technology of China Hefei Anhui China
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials ScienceUniversity of Science and Technology of China Hefei Anhui China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale CAS Key Laboratory of Soft Matter Chemistry & Center for Excellence in Molecular Synthesis of Chinese Academy of Sciences Collaborative Innovation Center of Suzhou Nano Science and Technology & School of Chemistry and Materials ScienceUniversity of Science and Technology of China Hefei Anhui China
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13
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Martínez-Cifuentes M, Monroy-Cárdenas M, Millas-Vargas JP, Weiss-López BE, Araya-Maturana R. Assessing Parameter Suitability for the Strength Evaluation of Intramolecular Resonance Assisted Hydrogen Bonding in o-Carbonyl Hydroquinones. Molecules 2019; 24:E280. [PMID: 30646498 PMCID: PMC6359028 DOI: 10.3390/molecules24020280] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 12/27/2018] [Accepted: 01/08/2019] [Indexed: 01/17/2023] Open
Abstract
Intramolecular hydrogen bond (IMHB) interactions have attracted considerable attention due to their central role in molecular structure, chemical reactivity, and interactions of biologically active molecules. Precise correlations of the strength of IMHB's with experimental parameters are a key goal in order to model compounds for drug discovery. In this work, we carry out an experimental (NMR) and theoretical (DFT) study of the IMHB in a series of structurally similar o-carbonyl hydroquinones. Geometrical parameters, as well as Natural Bond Orbital (NBO) and Quantum Theory of Atoms in Molecules (QTAIM) parameters for IMHB were compared with experimental NMR data. Three DFT functionals were employed to calculated theoretical parameters: B3LYP, M06-2X, and ωB97XD. O…H distance is the most suitable geometrical parameter to distinguish among similar IMHBs. Second order stabilization energies ΔEij(2) from NBO analysis and hydrogen bond energy (EHB) obtained from QTAIM analysis also properly distinguishes the order in strength of the studied IMHB. ΔEij(2) from NBO give values for the IMHB below 30 kcal/mol, while EHB from QTAIM analysis give values above 30 kcal/mol. In all cases, the calculated parameters using ωB97XD give the best correlations with experimental ¹H-NMR chemical shifts for the IMHB, with R² values around 0.89. Although the results show that these parameters correctly reflect the strength of the IMHB, when the weakest one is removed from the analysis, arguing experimental considerations, correlations improve significantly to values around 0.95 for R².
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Affiliation(s)
- Maximiliano Martínez-Cifuentes
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, Casilla 9845, Santiago 8940577, Chile.
| | - Matías Monroy-Cárdenas
- Instituto de Química de Recursos Naturales, Universidad de Talca, Av. Lircay s/n, Casilla 747, Talca 3460000, Chile.
| | - Juan Pablo Millas-Vargas
- Instituto de Química de Recursos Naturales, Universidad de Talca, Av. Lircay s/n, Casilla 747, Talca 3460000, Chile.
| | - Boris E Weiss-López
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Santiago 7800003, Chile.
| | - Ramiro Araya-Maturana
- Instituto de Química de Recursos Naturales, Universidad de Talca, Av. Lircay s/n, Casilla 747, Talca 3460000, Chile.
- Programa de Investigación Asociativa en Cáncer Gástrico (PIA-CG), Universidad de Talca, Talca 3460000, Chile.
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Platelet mitochondrial dysfunction and mitochondria-targeted quinone-and hydroquinone-derivatives: Review on new strategy of antiplatelet activity. Biochem Pharmacol 2018; 156:215-222. [DOI: 10.1016/j.bcp.2018.08.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Accepted: 08/21/2018] [Indexed: 01/03/2023]
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Lopes da Silva AR, Jhones dos Santos A, Martínez-Huitle CA. Electrochemical measurements and theoretical studies for understanding the behavior of catechol, resorcinol and hydroquinone on the boron doped diamond surface. RSC Adv 2018; 8:3483-3492. [PMID: 35542960 PMCID: PMC9077693 DOI: 10.1039/c7ra12257h] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 01/08/2018] [Indexed: 12/04/2022] Open
Abstract
Using electrochemical techniques (cyclic voltammetry (CV) and differential pulse voltammetry (DPV)) with a boron-doped diamond (BDD) electrode it was possible to study the behavior of hydroquinone (HQ), catechol (CT) and resorcinol (RS), in aqueous solutions as well as to associate the electrochemical profiles with computational simulations. It led to understanding the factors that influence the direct electrooxidation of HQ, CT and RS on the BDD surface. Theoretical calculations demonstrated that the compounds with lower HOMO energy and high ionization potential (IP) are more stable, showing a higher Epa, denoting that HOMO energies and IP are related to the difficulty of oxidizing (losing an electron) a specific compound. Analyzing the electro-oxidation reactions of HQ, CT and RS by using computational calculations, it was possible to verify the reversibility behavior, direct oxidation pathway and the possible intermediates formed during electron-transfer. The results clearly demonstrated that the reversibility was attained for HQ and CT, while this behavior is not feasible, thermodynamically speaking, for RS and this was confirmed by DFT calculations. For direct oxidation mechanisms, HQ and CT are quickly oxidized, but RS produces stable intermediates. These experimental and theoretical results also explain the behavior when the compounds were analyzed by electroanalytical techniques, suggesting that the interactions by direct electron-transfer determine the stability of response (sensitivity) as well as the limit of detection. The results are described and discussed in light of the existing literature. Using electrochemical techniques it was possible to study the behavior of hydroquinone, catechol and resorcinol, at boron doped diamond surface in aqueous solutions as well as to associate the electrochemical profiles with computational simulations.![]()
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Affiliation(s)
- Amison Rick Lopes da Silva
- Laboratório de Eletroquímica Ambiental e Aplicada (LEAA)
- Institute of Chemistry
- Federal University of Rio Grande do Norte
- Natal
- Brazil
| | - Alexsandro Jhones dos Santos
- Laboratório de Eletroquímica Ambiental e Aplicada (LEAA)
- Institute of Chemistry
- Federal University of Rio Grande do Norte
- Natal
- Brazil
| | - Carlos Alberto Martínez-Huitle
- Laboratório de Eletroquímica Ambiental e Aplicada (LEAA)
- Institute of Chemistry
- Federal University of Rio Grande do Norte
- Natal
- Brazil
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Nagaraja C, Venkatesha TV. The influence of electron donating tendency on electrochemical oxidative behavior of hydroquinone: Experimental and theoretical investigations. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2017.12.035] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Celis-Salazar PJ, Epley CC, Ahrenholtz SR, Maza WA, Usov PM, Morris AJ. Proton-Coupled Electron Transport in Anthraquinone-Based Zirconium Metal–Organic Frameworks. Inorg Chem 2017; 56:13741-13747. [DOI: 10.1021/acs.inorgchem.7b01656] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Charity C. Epley
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | | | - William A. Maza
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Pavel M. Usov
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Amanda J. Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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Intermolecular hydrogen bonds between 1,4-benzoquinones and HF molecule: Synergetic effects, reduction potentials and electron affinities. J Mol Graph Model 2017; 77:86-93. [PMID: 28850896 DOI: 10.1016/j.jmgm.2017.08.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 08/10/2017] [Accepted: 08/11/2017] [Indexed: 11/20/2022]
Abstract
Some biological activities of quinones can be attributed to the H-bonding ability of acceptor oxygen atoms. According to the results obtained from the quantum mechanical calculations performed on a wide variety of complexes between the 1,4-benzoquinone (BQ) derivatives and HF molecules, the interplay between H-bonds and individual H-bond interaction energies (EHB) can be affected by the substituents placed on the six-membered ring of BQ. The total binding energies of complexes become more negative by the electron donating substituents (EDSs) while the changes are reversed by the electron withdrawing substituents (EWSs). The mutual interplay between the X-BQ⋯(HF)n (n=1-3) interactions has been investigated using the geometrical parameters, synergetic energies (SE) and the EHB values. Hydrogen bonding decreases the reduction potentials (E0red) and increases the electron affinities (EA) of X-BQ derivatives. Linear relationships have been observed between the E0red (and EA) values and the Hammett constants of substituents.
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Martínez-Cifuentes M, Cardona W, Saitz C, Weiss-López B, Araya-Maturana R. A Study about Regioisomeric Hydroquinones with Multiple Intramolecular Hydrogen Bonding. Molecules 2017; 22:molecules22040593. [PMID: 28387716 PMCID: PMC6153943 DOI: 10.3390/molecules22040593] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 03/27/2017] [Accepted: 04/04/2017] [Indexed: 11/19/2022] Open
Abstract
A theoretical exploration about hydrogen bonding in a series of synthetic regioisomeric antitumor tricyclic hydroquinones is presented. The stabilization energy for the intramolecular hydrogen bond (IHB) formation in four structurally different situations were evaluated: (a) IHB between the proton of a phenolic hydroxyl group and an ortho-carbonyl group (forming a six-membered ring); (b) between the oxygen atom of a phenolic hydroxyl group and the proton of an hydroxyalkyl group (seven membered ring); (c) between the proton of a phenolic hydroxyl group with the oxygen atom of the hydroxyl group of a hydroxyalkyl moiety (seven-membered ring); and (d) between the proton of a phenolic hydroxyl group and an oxygen atom directly bonded to the aromatic ring in ortho position (five-membered ring). A conformational analysis for the rotation around the hydroxyalkyl substituent is also performed. It is observed that there is a correspondence between the conformational energies and the IHB. The strongest intramolecular hydrogen bonds are those involving a phenolic proton and a carbonyl oxygen atom, forming a six-membered ring, and the weakest are those involving a phenolic proton with the oxygen atom of the chromenone, forming five-membered rings. Additionally, the synthesis and structural assignment of two pairs of regioisomeric hydroquinones, by 2D-NMR experiments, are reported. These results can be useful in the design of biologically-active molecules.
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Affiliation(s)
- Maximiliano Martínez-Cifuentes
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, Casilla 9845, Santiago 8940577, Chile.
| | - Wilson Cardona
- Departamento de Ciencias Químicas, Facultad de Ciencias Exactas, Universidad Andrés Bello, Autopista Concepción-Talcahuano 7100, Talcahuano 4300866, Chile.
| | - Claudio Saitz
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Casilla 233, Santiago 8380494, Chile.
| | - Boris Weiss-López
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Santiago 7800003, Chile.
| | - Ramiro Araya-Maturana
- Instituto de Química de Recursos Naturales, Universidad de Talca, Av. Lircay s/n, Casilla 747, Talca 3460000, Chile.
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Martínez-Cifuentes M, Clavijo-Allancan G, Zuñiga-Hormazabal P, Aranda B, Barriga A, Weiss-López B, Araya-Maturana R. Protonation Sites, Tandem Mass Spectrometry and Computational Calculations of o-Carbonyl Carbazolequinone Derivatives. Int J Mol Sci 2016; 17:ijms17071071. [PMID: 27399676 PMCID: PMC4964447 DOI: 10.3390/ijms17071071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Revised: 06/10/2016] [Accepted: 06/28/2016] [Indexed: 11/16/2022] Open
Abstract
A series of a new type of tetracyclic carbazolequinones incorporating a carbonyl group at the ortho position relative to the quinone moiety was synthesized and analyzed by tandem electrospray ionization mass spectrometry (ESI/MS-MS), using Collision-Induced Dissociation (CID) to dissociate the protonated species. Theoretical parameters such as molecular electrostatic potential (MEP), local Fukui functions and local Parr function for electrophilic attack as well as proton affinity (PA) and gas phase basicity (GB), were used to explain the preferred protonation sites. Transition states of some main fragmentation routes were obtained and the energies calculated at density functional theory (DFT) B3LYP level were compared with the obtained by ab initio quadratic configuration interaction with single and double excitation (QCISD). The results are in accordance with the observed distribution of ions. The nature of the substituents in the aromatic ring has a notable impact on the fragmentation routes of the molecules.
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Affiliation(s)
- Maximiliano Martínez-Cifuentes
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Las Palmeras 3360, Casilla 9845, Santiago 7800003, Chile.
| | - Graciela Clavijo-Allancan
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Santiago 7800003, Chile.
| | - Pamela Zuñiga-Hormazabal
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Santiago 7800003, Chile.
| | - Braulio Aranda
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Santiago 7800003, Chile.
| | - Andrés Barriga
- Unidad de Espectrometría de Masas, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santos Dumont 964, Casilla 233, Santiago 8380494, Chile.
| | - Boris Weiss-López
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras 3425, Casilla 653, Santiago 7800003, Chile.
| | - Ramiro Araya-Maturana
- Instituto de Química de Recursos Naturales, Universidad de Talca, Av. Lircay s/n, Casilla 747, Talca 3460000, Chile.
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21
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Namazian M, Zare HR, Yousofian-Varzaneh H. Electrochemical behavior of tetrafluoro-p-benzoquinone at the presence of carbon dioxide: Experimental and theoretical studies. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.159] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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Wang Z, Li A, Gou L, Ren J, Zhai G. Computational electrochemistry study of derivatives of anthraquinone and phenanthraquinone analogues: the substitution effect. RSC Adv 2016. [DOI: 10.1039/c6ra19128b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Effects of functional group position on the calculated redox potential for the single electron-withdrawing group substitution of phenanthraquinone analogues.
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Affiliation(s)
- Zhen Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Anyang Li
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
| | - Lei Gou
- School of Materials Science and Engineering
- Chang'an University
- Xi'an
- China
| | - Jingzheng Ren
- Department of Technology and Innovation
- University of Southern Denmark
- Odense M
- Denmark
| | - Gaohong Zhai
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- Ministry of Education
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710127
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Li Y, Gao H, Zhang Z, Qian P, Bi M, Zha Z, Wang Z. Electrochemical synthesis of α-enaminones from aryl ketones. Chem Commun (Camb) 2016; 52:8600-3. [DOI: 10.1039/c6cc03709g] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A novel approach to realize the synthesis of α-enaminones via electrochemical oxidation was developed under mild conditions.
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Affiliation(s)
- Yanan Li
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Huihui Gao
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Zhenlei Zhang
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Peng Qian
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Meixiang Bi
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Zhenggen Zha
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Zhiyong Wang
- Hefei National Laboratory for Physical Sciences at Microscale
- CAS Key Laboratory of Soft Matter Chemistry and Department of Chemistry & Collaborative Innovation Center of Suzhou Nano Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
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Martínez-Cifuentes M, Salazar R, Escobar CA, Weiss-López BE, Santos LS, Araya-Maturana R. Correlating experimental electrochemistry and theoretical calculations in 2′-hydroxy chalcones: the role of the intramolecular hydrogen bond. RSC Adv 2015. [DOI: 10.1039/c5ra10140a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
The molecular structure and electrochemical behaviour of a series of 2′-hydroxychalcones were studied. Results show the importance of the intramolecular hydrogen bond and the methoxy substituent pattern on the redox properties of these compounds.
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Affiliation(s)
| | - Ricardo Salazar
- Laboratorio de Electroquímica MedioAmbiental
- LEQMA
- Departamento de Química de los Materiales
- Facultad de Química y Biología
- Universidad de Santiago de Chile, USACh
| | - Carlos A. Escobar
- Departamento de Ciencias Químicas
- Universidad Andres Bello
- Santiago
- Chile
| | | | - Leonardo S. Santos
- Laboratorio de Síntesis Asimétrica
- Instituto de Química de los Recursos Naturales
- Universidad de Talca
- Talca
- Chile
| | - Ramiro Araya-Maturana
- Departamento de Química Orgánica y Fisicoquímica
- Facultad de Ciencias Químicas Y Farmacéuticas
- Universidad de Chile
- Santiago 1
- Chile
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