1
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Liu ZQ. What about the progress in the synthesis of flavonoid from 2020? Eur J Med Chem 2022; 243:114671. [DOI: 10.1016/j.ejmech.2022.114671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 08/06/2022] [Accepted: 08/06/2022] [Indexed: 11/04/2022]
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2
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Alfieri ML, Panzella L, Amorati R, Cariola A, Valgimigli L, Napolitano A. Role of Sulphur and Heavier Chalcogens on the Antioxidant Power and Bioactivity of Natural Phenolic Compounds. Biomolecules 2022; 12:90. [PMID: 35053239 PMCID: PMC8774257 DOI: 10.3390/biom12010090] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/03/2022] [Accepted: 01/04/2022] [Indexed: 02/06/2023] Open
Abstract
The activity of natural phenols is primarily associated to their antioxidant potential, but is ultimately expressed in a variety of biological effects. Molecular scaffold manipulation of this large variety of compounds is a currently pursued approach to boost or modulate their properties. Insertion of S/Se/Te containing substituents on phenols may increase/decrease their H-donor/acceptor ability by electronic and stereo-electronic effects related to the site of substitution and geometrical constrains. Oxygen to sulphur/selenium isosteric replacement in resveratrol or ferulic acid leads to an increase in the radical scavenging activity with respect to the parent phenol. Several chalcogen-substituted phenols inspired by Vitamin E and flavonoids have been prepared, which in some cases prove to be chain-breaking antioxidants, far better than the natural counterparts. Conjugation of catechols with biological thiols (cysteine, glutathione, dihydrolipoic acid) is easily achieved by addition to the corresponding ortho-quinones. Noticeable examples of compounds with potentiated antioxidant activities are the human metabolite 5-S-cysteinyldopa, with high iron-induced lipid peroxidation inhibitory activity, due to strong iron (III) binding, 5-S-glutathionylpiceatannol a most effective inhibitor of nitrosation processes, and 5-S-lipoylhydroxytyrosol, and its polysulfides that proved valuable oxidative-stress protective agents in various cellular models. Different methodologies have been used for evaluation of the antioxidant power of these compounds against the parent compounds. These include kinetics of inhibition of lipid peroxidation alkylperoxyl radicals, common chemical assays of radical scavenging, inhibition of the OH• mediated hydroxylation/oxidation of model systems, ferric- or copper-reducing power, scavenging of nitrosating species. In addition, computational methods allowed researchers to determine the Bond Dissociation Enthalpy values of the OH groups of chalcogen modified phenolics and predict the best performing derivative. Finally, the activity of Se and Te containing compounds as mimic of glutathione peroxidase has been evaluated, together with other biological activities including anticancer action and (neuro)protective effects in various cellular models. These and other achievements are discussed and rationalized to guide future development in the field.
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Affiliation(s)
- Maria Laura Alfieri
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, I-80126 Naples, Italy; (M.L.A.); (L.P.)
| | - Lucia Panzella
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, I-80126 Naples, Italy; (M.L.A.); (L.P.)
| | - Riccardo Amorati
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via S. Giacomo 11, I-40126 Bologna, Italy; (R.A.); (A.C.)
| | - Alice Cariola
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via S. Giacomo 11, I-40126 Bologna, Italy; (R.A.); (A.C.)
| | - Luca Valgimigli
- Department of Chemistry “Giacomo Ciamician”, University of Bologna, Via S. Giacomo 11, I-40126 Bologna, Italy; (R.A.); (A.C.)
| | - Alessandra Napolitano
- Department of Chemical Sciences, University of Naples “Federico II”, Via Cintia 21, I-80126 Naples, Italy; (M.L.A.); (L.P.)
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3
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Smolyaninov IV, Burmistrova DA, Arsenyev MV, Almyasheva NR, Ivanova ES, Smolyaninova SA, Pashchenko KP, Poddel'sky AI, Berberova NT. Catechol‐ and Phenol‐Containing Thio‐Schiff Bases: Synthesis, Electrochemical Properties and Biological Evaluation. ChemistrySelect 2021. [DOI: 10.1002/slct.202102246] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Ivan V. Smolyaninov
- Department of Chemistry Astrakhan State Technical University 16 Tatischeva str. Astrakhan 414056 Russia
| | - Daria A. Burmistrova
- Department of Chemistry Astrakhan State Technical University 16 Tatischeva str. Astrakhan 414056 Russia
| | - Maxim V. Arsenyev
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences 49 Tropinina str. 603137 Nizhny Novgorod Russia
| | - Nailya R. Almyasheva
- Gause Institute of New Antibiotics 11/1 Bolshaya Pirogovskaya str. Moscow 119021 Russian Federation
| | - Ekaterina S. Ivanova
- Blokhin National Medical Research Center of Oncology 24 Kashirskoye Shosse Moscow 115478 Russian Federation
| | - Susanna A. Smolyaninova
- Department of Chemistry Astrakhan State Technical University 16 Tatischeva str. Astrakhan 414056 Russia
| | - Konstantin P. Pashchenko
- Department of Chemistry Astrakhan State Technical University 16 Tatischeva str. Astrakhan 414056 Russia
| | - Andrey I. Poddel'sky
- G.A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences 49 Tropinina str. 603137 Nizhny Novgorod Russia
| | - Nadezhda T. Berberova
- Department of Chemistry Astrakhan State Technical University 16 Tatischeva str. Astrakhan 414056 Russia
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4
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Protective Role of Natural and Semi-Synthetic Tocopherols on TNFα-Induced ROS Production and ICAM-1 and Cl-2 Expression in HT29 Intestinal Epithelial Cells. Antioxidants (Basel) 2021; 10:antiox10020160. [PMID: 33499140 PMCID: PMC7911239 DOI: 10.3390/antiox10020160] [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: 11/18/2020] [Revised: 12/31/2020] [Accepted: 01/19/2021] [Indexed: 12/12/2022] Open
Abstract
Vitamin E, a fat-soluble compound, possesses both antioxidant and non-antioxidant properties. In this study we evaluated, in intestinal HT29 cells, the role of natural tocopherols, α-Toc and δ-Toc, and two semi-synthetic derivatives, namely bis-δ-Toc sulfide (δ-Toc)2S and bis-δ-Toc disulfide (δ-Toc)2S2, on TNFα-induced oxidative stress, and intercellular adhesion molecule-1 (ICAM-1) and claudin-2 (Cl-2) expression. The role of tocopherols was compared to that of N-acetylcysteine (NAC), an antioxidant precursor of glutathione synthesis. The results show that all tocopherol containing derivatives used, prevented TNFα-induced oxidative stress and the increase of ICAM-1 and Cl-2 expression, and that (δ-Toc)2S and (δ-Toc)2S2 are more effective than δ-Toc and α-Toc. The beneficial effects demonstrated were due to tocopherol antioxidant properties, but suppression of TNFα-induced Cl-2 expression seems not only to be related with antioxidant ability. Indeed, while ICAM-1 expression is strongly related to the intracellular redox state, Cl-2 expression is TNFα-up-regulated by both redox and non-redox dependent mechanisms. Since ICAM-1 and Cl-2 increase intestinal bowel diseases, and cause excessive recruitment of immune cells and alteration of the intestinal barrier, natural and, above all, semi-synthetic tocopherols may have a potential role as a therapeutic support against intestinal chronic inflammation, in which TNFα represents an important proinflammatory mediator.
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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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Donoso-Bustamante V, Borrego EA, Schiaffino-Bustamante Y, Gutiérrez DA, Millas-Vargas JP, Fuentes-Retamal S, Correa P, Carrillo I, Aguilera RJ, Miranda D, Chávez-Báez I, Pulgar R, Urra FA, Varela-Ramírez A, Araya-Maturana R. An acylhydroquinone derivative produces OXPHOS uncoupling and sensitization to BH3 mimetic ABT-199 (Venetoclax) in human promyelocytic leukemia cells. Bioorg Chem 2020; 100:103935. [PMID: 32454391 DOI: 10.1016/j.bioorg.2020.103935] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 05/02/2020] [Accepted: 05/11/2020] [Indexed: 12/16/2022]
Abstract
Since cancer cells have different mitochondrial bioenergetic requirements than non-cancerous cells, therapeutic inhibition of its mitochondrial functionality continues to be an important target for anticancer drug discovery. In this study, a series of acylhydroquinones with different acyl-chain length, and their chlorinated derivatives, in the aromatic ring, synthesized by Fries rearrangement under microwave irradiation, were evaluated for their anticancer activity in two leukemia cell lines. Findings from the primary and secondary screening of the 18 acylhydroquinones, tested at 5 µM on acute promyelocytic leukemia HL-60 and acute lymphoblastic leukemia CEM cells lines, identified an acylchlorohydroquinone (12) with a highly selective anti-proliferative effect toward HL-60 cells. This compound induced S-phase arrest in the cell cycle progression of HL-60 cells with insignificant toxicity on leukemic CEM cells and non-cancerous Hs27 cells. In HL-60 leukemic cells, 12 triggered increased mitochondrial NADH oxidation, increased respiration in presence of oligomycin (state 4o), mitochondrial depolarization, and ROS production, suggesting an uncoupling of OXPHOS. This provoked a metabolic adaptation dependent on AMPK/ACC/autophagy axis, having the mitochondrial β-oxidation a pro-survival role since the combination of 12 and etomoxir, a carnitine palmitoyl-transferase (CPT) inhibitor promoted extensive HL-60 cell death. Finally, 12-induced metabolic stress sensitized to HL-60 cells to cell death by the FDA-approved anti-leukemic drug ABT-199, a BH3 mimetic. Therefore, our results suggest that acylchlorohydroquinone is a promising scaffold in anti-promyelocytic leukemia drug research.
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Affiliation(s)
- Viviana Donoso-Bustamante
- Instituto de Química de Recursos Naturales, Universidad de Talca, Chile; Programa de Investigación Asociativa en Cáncer Gástrico, Universidad de Talca, Chile
| | - Edgar A Borrego
- Border Biomedical Research Center, Department of Biological Sciences, The University of Texas at El Paso, USA
| | | | - Denisse A Gutiérrez
- Border Biomedical Research Center, Department of Biological Sciences, The University of Texas at El Paso, USA
| | - Juan Pablo Millas-Vargas
- Instituto de Química de Recursos Naturales, Universidad de Talca, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile
| | - Sebastián Fuentes-Retamal
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile; Programa de Investigación Asociativa en Cáncer Gástrico, Universidad de Talca, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile
| | - Pablo Correa
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile
| | - Ileana Carrillo
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Renato J Aguilera
- Border Biomedical Research Center, Department of Biological Sciences, The University of Texas at El Paso, USA
| | - Dante Miranda
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Ignacio Chávez-Báez
- Network for Snake Venom Research and Drug Discovery, Santiago, Chile; Laboratorio de Genómica y Genética de Interacciones Biológicas, INTA-Universidad de Chile, Santiago, Chile
| | - Rodrigo Pulgar
- Network for Snake Venom Research and Drug Discovery, Santiago, Chile; Laboratorio de Genómica y Genética de Interacciones Biológicas, INTA-Universidad de Chile, Santiago, Chile
| | - Félix A Urra
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile.
| | - Armando Varela-Ramírez
- Border Biomedical Research Center, Department of Biological Sciences, The University of Texas at El Paso, USA.
| | - Ramiro Araya-Maturana
- Instituto de Química de Recursos Naturales, Universidad de Talca, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile.
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7
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Méndez D, Urra FA, Millas-Vargas JP, Alarcón M, Rodríguez-Lavado J, Palomo I, Trostchansky A, Araya-Maturana R, Fuentes E. Synthesis of antiplatelet ortho-carbonyl hydroquinones with differential action on platelet aggregation stimulated by collagen or TRAP-6. Eur J Med Chem 2020; 192:112187. [PMID: 32155530 DOI: 10.1016/j.ejmech.2020.112187] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 02/23/2020] [Accepted: 02/24/2020] [Indexed: 02/07/2023]
Abstract
Cardiovascular diseases are the leading cause of death in the world. Platelets have a major role in cardiovascular events as they bind to the damaged endothelium activating and forming thrombi. Although some hydroquinone scaffold-containing compounds have known antiplatelet activities, currently there is a lack of evidence on the antiplatelet activity of hydroquinones carrying electron attractor groups. In this work, we evaluate the antiplatelet effect of a series of ortho-carbonyl hydroquinone derivatives on cytotoxicity and function of human platelets, using collagen and thrombin receptor activator peptide 6 (TRAP-6) as agonists. Our structure-activity relationship study shows that gem-diethyl/methyl substitutions and the addition/modifications of the third ring of ortho-carbonyl hydroquinone scaffold influence on the selective index (IC50 TRAP-6/IC50 Collagen) and the inhibitory capacity of platelet aggregation. Compounds 3 and 8 inhibit agonist-induced platelet aggregation in a non-competitive manner with IC50 values of 1.77 ± 2.09 μM (collagen) and 11.88 ± 4.59 μM (TRAP-6), respectively and show no cytotoxicity. Both compounds do not affect intracellular calcium levels and mitochondrial bioenergetics. Consistently, they reduce the expression of P-selectin, activation of glycoprotein IIb/IIIa, and release of adenosine triphosphate and CD63 from platelet. Our findings may be used for further development of new drugs in platelet-related thrombosis diseases.
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Affiliation(s)
- Diego Méndez
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | - Félix A Urra
- Molecular and Clinical Pharmacology Program, Institute of Biomedical Sciences, Faculty of Medicine, University of Chile, Santiago, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile.
| | - Juan Pablo Millas-Vargas
- Instituto de Química de Recursos Naturales, Programa de Investigación Asociativa en Cáncer Gástrico (PIA-CG), Universidad de Talca, Talca, Chile
| | - Marcelo Alarcón
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | - Julio Rodríguez-Lavado
- Departamento de Química Orgánica y Fisicoquímica, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago, Chile
| | - Iván Palomo
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile
| | - Andrés Trostchansky
- Departamento de Bioquímica and Center for Free Radical and Biomedical Research, Facultad de Medicina, Universidad de la República, Montevideo, Uruguay
| | - Ramiro Araya-Maturana
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile; Instituto de Química de Recursos Naturales, Programa de Investigación Asociativa en Cáncer Gástrico (PIA-CG), Universidad de Talca, Talca, Chile; Network for Snake Venom Research and Drug Discovery, Santiago, Chile.
| | - Eduardo Fuentes
- Thrombosis Research Center, Medical Technology School, Department of Clinical Biochemistry and Immunohaematology, Faculty of Health Sciences, Universidad de Talca, Talca, Chile.
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8
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Viglianisi C, Menichetti S. Chain Breaking Antioxidant Activity of Heavy (S, Se, Te) Chalcogens Substituted Polyphenols. Antioxidants (Basel) 2019; 8:antiox8100487. [PMID: 31623080 PMCID: PMC6826409 DOI: 10.3390/antiox8100487] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 12/13/2022] Open
Abstract
Polyphenols are probably the most important family of natural and synthetic chain-breaking antioxidants. Since long ago, chemists have studied how structural (bioinspired) modifications can improve the antioxidant activity of these compounds in terms of reaction rate with radical reactive oxygen species (ROS), catalytic character, multi-defence action, hydrophilicity/lipophilicity, biodistribution etc. In this framework, we will discuss the effect played on the overall antioxidant profile by the insertion of heavy chalcogens (S, Se and Te) in the phenolic skeleton.
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Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
| | - Stefano Menichetti
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy.
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9
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Viglianisi C, Vasa K, Tanini D, Capperucci A, Amorati R, Valgimigli L, Baschieri A, Menichetti S. Ditocopheryl Sulfides and Disulfides: Synthesis and Antioxidant Profile. Chemistry 2019; 25:9108-9116. [PMID: 31017702 DOI: 10.1002/chem.201901537] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Indexed: 12/14/2022]
Abstract
Symmetrical ditocopheryl disulfides (Toc)2 S2 and symmetrical and unsymmetrical ditocopheryl sulfides (Toc)2 S were simply prepared under remarkably mild conditions with complete control of the regiochemistry by using δ-, γ-, and β-tocopheryl-N-thiophthalimides (Toc-NSPht) as common starting materials. The roles of sulfur atom(s), H-bond and aryl ring substitution pattern on the antioxidant profile of these new compounds, which were assembled by linking together two tocopheryl units, are also discussed.
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Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Kristian Vasa
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Damiano Tanini
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Antonella Capperucci
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
| | - Riccardo Amorati
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna, Italy
| | - Luca Valgimigli
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna, Italy
| | - Andrea Baschieri
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126, Bologna, Italy
| | - Stefano Menichetti
- Department of Chemistry "Ugo Schiff", University of Florence, Via Della Lastruccia 3-13, Sesto Fiorentino, Firenze, Italy
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Smolyaninov IV, Pitikova OV, Korchagina EO, Poddel'sky AI, Fukin GK, Luzhnova SA, Tichkomirov AM, Ponomareva EN, Berberova NT. Catechol thioethers with physiologically active fragments: Electrochemistry, antioxidant and cryoprotective activities. Bioorg Chem 2019; 89:103003. [PMID: 31132599 DOI: 10.1016/j.bioorg.2019.103003] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2019] [Revised: 05/15/2019] [Accepted: 05/19/2019] [Indexed: 12/16/2022]
Abstract
A number of asymmetrical thioethers based on 3,5-di-tert-butylcatechol containing sulfur atom bonding with physiologically active groups in the sixth position of aromatic ring have been synthesized and the electrochemical properties, antioxidant, cryoprotective activities of new thioethers have been evaluated. Cyclic voltammetry was used to estimate the oxidation potentials of thioethers in acetonitrile. The electrooxidation of compounds at the first stage leads to the formation of o-benzoquinones. The antioxidant activities of the compounds were determined using 2,2'-diphenyl-1-picrylhydrazyl radical (DPPH) assay, experiments on the oxidative damage of the DNA, the reaction of 2,2'-azobis(2-amidinopropane hydrochloride) (AAPH) induced glutathione depletion (GSH), the process of lipid peroxidation of rat liver (Wistar) homogenates in vitro, and iron(II) chelation test. Compounds 1-9 have greater antioxidant effectiveness than 3,5-di-tert-butylcatechol (CatH2) in all assays. The variation of physiologically active groups at sulfur atom allows to regulate lipophilic properties and antioxidant activity of compounds. Thioethers 3, 4 and 7 demonstrate the combination of radical scavenging, antioxidant activity and iron(II) binding properties. The researched compounds 1-9 were studied as possible cryoprotectants of the media for cryopreservation of the Russian sturgeon sperm. Novel cryoprotective additives in cryomedium reduce significantly the content of membrane-permeating agent (DMSO). A cryoprotective effect of an addition of the catechol thioethers depends on the structure of groups at sulfur atom. The cryoprotective properties of compounds 3, 4 and 7 are caused by combination of catechol fragment, bonded by a thioether linker with a long hydrocarbon chain and a terminal ionizable group or with a biologically relevant acetylcysteine residue.
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Affiliation(s)
- Ivan V Smolyaninov
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; Toxicology Research Group of Southern Scientific Centre of Russian Academy of Science, 41 Chekhova str., Rostov-on-Don 344006, Russia.
| | - Olga V Pitikova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
| | - Eugenia O Korchagina
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
| | - Andrey I Poddel'sky
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia
| | - Georgy K Fukin
- G.A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina str., 603137 Nizhny Novgorod, Russia
| | - Svetlana A Luzhnova
- Department of Microbiology and Immunology, Pyatigorsk Medicinal and Pharmaceutical Institute, 11 Kalinina str., Pyatigorsk 357500, Russia
| | - Andrey M Tichkomirov
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
| | - Elena N Ponomareva
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia; Toxicology Research Group of Southern Scientific Centre of Russian Academy of Science, 41 Chekhova str., Rostov-on-Don 344006, Russia
| | - Nadezhda T Berberova
- Department of Chemistry, Astrakhan State Technical University, 16 Tatisheva str., Astrakhan 414056, Russia
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11
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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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12
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Electrochemical transformations and antiradical activity of asymmetrical RS-substituted pyrocatechols. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2299-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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13
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Menichetti S, Faggi C, Onori M, Piantini S, Ferreira M, Rocchi S, Lupi M, Marin I, Maggini M, Viglianisi C. Thia-Bridged Triarylamine Hetero[4]Helicenes: Regioselective Synthesis and Functionalization. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801493] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Stefano Menichetti
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Cristina Faggi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Martina Onori
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Sara Piantini
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Misael Ferreira
- Conselho Nacional de Desenvolvimento Científico e Tecnológico - CNPq; 71605-170 Brasilia, DF Brazil
| | - Sara Rocchi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Michela Lupi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Ivan Marin
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
| | - Michele Maggini
- Department of Chemical Science; University of Padua; Via Marzolo 1 35131 Padova Italy
| | - Caterina Viglianisi
- Department of Chemistry “Ugo Schiff”; University of Florence; Via della Lastruccia, 3-13 50019 Sesto Fiorentino Italy
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14
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Smolyaninov I, Pitikova O, Korchagina E, Poddel’sky A, Luzhnova S, Berberova N. Electrochemical behavior and anti/prooxidant activity of thioethers with redox-active catechol moiety. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2264-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Catechol-Containing Hydroxylated Biomimetic 4-Thiaflavanes as Inhibitors of Amyloid Aggregation. Biomimetics (Basel) 2017; 2:biomimetics2020006. [PMID: 31105169 PMCID: PMC6477597 DOI: 10.3390/biomimetics2020006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/03/2017] [Accepted: 05/04/2017] [Indexed: 01/03/2023] Open
Abstract
The study of compounds able to interfere in various ways with amyloid aggregation is of paramount importance in amyloid research. Molecules characterized by a 4-thiaflavane skeleton have received great attention in chemical, medicinal, and pharmaceutical research. Such molecules, especially polyhydroxylated 4-thiaflavanes, can be considered as structural mimickers of several natural polyphenols that have been previously demonstrated to bind and impair amyloid fibril formation. In this work, we tested five different 4-thiaflavanes on the hen egg-white lysozyme (HEWL) amyloid model for their potential anti-amyloid properties. By combining a thioflavin T assay, atomic force microscopy, and a cell toxicity assay, we demonstrated that such compounds can impair the formation of high-order amyloid aggregates and mature fibrils. Despite this, the tested 4-thiaflavanes, although non-toxic per se, are not able to prevent amyloid toxicity on human neuroblastoma cells. Rather, they proved to block early aggregates in a stable, toxic conformation. Accordingly, 4-thiaflavanes can be proposed for further studies aimed at identifying blocking agents for the study of toxicity mechanisms of amyloid aggregation.
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16
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Li CQ, Guo SY, Wang J, Shi WG. Synthesis, antioxidant properties, and reaction kinetics of aliphatic diamine bridged hindered phenols. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363216120422] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Measuring Antioxidant Activity in Bioorganic Samples by the Differential Oxygen Uptake Apparatus: Recent Advances. J CHEM-NY 2017. [DOI: 10.1155/2017/6369358] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The measure of O2 consumption during the inhibited autoxidation of an easily oxidizable substrate is one of the most reliable and predictive methods to assess antioxidant activity, especially for structure-activity relationship studies, for food and industrial applications. The differential oxygen uptake apparatus described herein represents a powerful and cost-effective way to obtain antioxidant activity from inhibited autoxidation studies. These experiments provide the rate constant and the stoichiometry of the reaction between antioxidants and peroxyl radicals (ROO∙), which are involved in the propagation of radical damage. We show the operation principles and the utility of this instrumentation in the bioorganic laboratory, with regard to the recent advances in this field, ranging from the study of natural antioxidants in biomimetic system, to the use of substrates generating hydroperoxyl radicals, and to the evaluation of novel nanoantioxidants.
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18
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Poon JF, Yan J, Singh VP, Gates PJ, Engman L. Regenerable Radical-Trapping Tellurobistocopherol Antioxidants. J Org Chem 2016; 81:12540-12544. [DOI: 10.1021/acs.joc.6b02450] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jia-fei Poon
- Department
of Chemistry−BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Jiajie Yan
- Department
of Chemistry−BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Vijay P. Singh
- Department
of Chemistry−BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
| | - Paul J. Gates
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - Lars Engman
- Department
of Chemistry−BMC, Uppsala University, Box 576, SE-751 23 Uppsala, Sweden
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19
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Menichetti S, Amorati R, Meoni V, Tofani L, Caminati G, Viglianisi C. Role of Noncovalent Sulfur···Oxygen Interactions in Phenoxyl Radical Stabilization: Synthesis of Super Tocopherol-like Antioxidants. Org Lett 2016; 18:5464-5467. [DOI: 10.1021/acs.orglett.6b02557] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Stefano Menichetti
- Department
of Chemistry “U. Schiff”, University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Riccardo Amorati
- Department
of Chemistry “Ciamician”, University of Bologna, Via San Giacomo 11, 40126 Bologna, Italy
| | - Valentina Meoni
- Department
of Chemistry “U. Schiff”, University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Lorenzo Tofani
- Department
of Chemistry “U. Schiff”, University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
| | - Gabriella Caminati
- Department
of Chemistry “U. Schiff”, University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
- CSGI, University of Florence, Via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
| | - Caterina Viglianisi
- Department
of Chemistry “U. Schiff”, University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy
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20
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Viglianisi C, Menichetti S, Piantini S, Tofani L. Helical-Shaped Bis-1,4-benzoxathiines through an Inverse-Electron-Demand Hetero-Diels-Alder Reaction ofortho-Thioquinones. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600850] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Stefano Menichetti
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Sara Piantini
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
| | - Lorenzo Tofani
- Department of Chemistry “U. Schiff”; University of Florence; Via della Lastruccia 3-13 50019 Sesto Fiorentino Italy
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21
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Viglianisi C, Amorati R, Di Pietro L, Menichetti S. A Straightforward Route to Potent Phenolic Chain-Breaking Antioxidants by Acid-Promoted Transposition of 1,4-Benzo[b]oxathiines to Dihydrobenzo[b]thiophenes. Chemistry 2015; 21:16639-45. [PMID: 26440303 DOI: 10.1002/chem.201502650] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Indexed: 12/25/2022]
Abstract
The transformation of simple phenols with limited antioxidant activity into potent chain-breaking antioxidants was achieved by a three-step protocol, consisting of the conversion of phenols into 1,4-benzo[b]oxathiines followed by an unprecedented acid-promoted transposition to o-hydroxydihydrobenzo[b]thiophenes, or dihydrobenzo[de]thiochromenes, starting from phenols or naphthols, respectively. These derivatives, bearing a benzo-fused heterocycle with a sulfide sulfur ortho to the phenolic OH, have a rate constant of reaction with alkylperoxyl radicals (kinh ) comparable to that of α-tocopherol. A solid rationale for the transposition mechanism as well as for the structure-antioxidant activity relationship is presented.
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Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Firenze (Italy).
| | - Riccardo Amorati
- Department of Chemistry "G. Ciamician", University of Bologna, Via S. Giacomo 11, 40126 Bologna (Italy)
| | - Leonardo Di Pietro
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Firenze (Italy)
| | - Stefano Menichetti
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 3-13, 50019, Sesto Fiorentino, Firenze (Italy).
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22
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Tanini D, Panzella L, Amorati R, Capperucci A, Pizzo E, Napolitano A, Menichetti S, d'Ischia M. Resveratrol-based benzoselenophenes with an enhanced antioxidant and chain breaking capacity. Org Biomol Chem 2015; 13:5757-64. [DOI: 10.1039/c5ob00193e] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
One-pot selenenylation of resveratrol with Se(0) and SO2Cl2 leads to benzoselenophene derivatives with efficient Trolox-like antioxidant and chain breaking capacity.
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Affiliation(s)
- Damiano Tanini
- Department of Chemistry “Ugo Schiff”
- University of Florence
- I-50019 Sesto Fiorentino
- Italy
| | - Lucia Panzella
- Department of Chemical Sciences
- University of Naples “Federico II”
- I-80126 Naples
- Italy
| | - Riccardo Amorati
- Department of Chemistry “G. Ciamician”
- University of Bologna
- I-40126 Bologna
- Italy
| | - Antonella Capperucci
- Department of Chemistry “Ugo Schiff”
- University of Florence
- I-50019 Sesto Fiorentino
- Italy
| | - Elio Pizzo
- Department of Biology
- University of Naples “Federico II”
- I-80126 Naples
- Italy
| | - Alessandra Napolitano
- Department of Chemical Sciences
- University of Naples “Federico II”
- I-80126 Naples
- Italy
| | - Stefano Menichetti
- Department of Chemistry “Ugo Schiff”
- University of Florence
- I-50019 Sesto Fiorentino
- Italy
| | - Marco d'Ischia
- Department of Chemical Sciences
- University of Naples “Federico II”
- I-80126 Naples
- Italy
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23
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Viglianisi C, Marcantoni E, Carapacchi V, Menichetti S, Marsili L. A Base-Mediated Mild Sulfenylation of Indoles and Pyrrole with α-Acylthiones. European J Org Chem 2014. [DOI: 10.1002/ejoc.201402894] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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24
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Viglianisi C, Sinni A, Menichetti S. Copper-Mediated One-Pot Access to 2,3-Dihydrobenzo[b][1,4]oxathiines fromo,o′-Dihydroxydisulfides. HETEROATOM CHEMISTRY 2014. [DOI: 10.1002/hc.21159] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Caterina Viglianisi
- Department of Chemistry ‘Ugo Schiff,’ University of Florence; Via della Lastruccia 3-13; I-50019 Sesto Fiorentino Italy
| | - Aidona Sinni
- Department of Chemistry ‘Ugo Schiff,’ University of Florence; Via della Lastruccia 3-13; I-50019 Sesto Fiorentino Italy
| | - Stefano Menichetti
- Department of Chemistry ‘Ugo Schiff,’ University of Florence; Via della Lastruccia 3-13; I-50019 Sesto Fiorentino Italy
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25
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Lai HW, Liu ZQ. Thiaflavan scavenges radicals and inhibits DNA oxidation: a story from the ferrocene modification. Eur J Med Chem 2014; 81:227-36. [PMID: 24842241 DOI: 10.1016/j.ejmech.2014.04.081] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2013] [Revised: 04/27/2014] [Accepted: 04/29/2014] [Indexed: 10/25/2022]
Abstract
4-Thiaflavan is a sulfur-substituted flavonoid with a benzoxathiin scaffold. The aim of this work is to compare abilities of sulfur and oxygen atom, hydroxyl groups, and ferrocene moiety at different positions of 4-thiaflavan to trap radicals and to inhibit DNA oxidation. It is found that abilities of thiaflavans to trap radicals and to inhibit DNA oxidation are increased in the presence of ferrocene moiety and are further improved by the electron-donating group attaching to thiaflavan skeleton. It can be concluded that the ferrocene moiety plays the major role for thiaflavans to be antioxidants even in the absence of phenolic hydroxyl groups. On the other hand, the antioxidant effectiveness of phenolic hydroxyl groups in thiaflavans can be improved by the electron-donating group. The influences of sulfur and oxygen atoms in thiaflavans on the antioxidant property of para-hydroxyl group exhibit different manners when the thiaflavans are used to trap radicals and to inhibit DNA oxidation.
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Affiliation(s)
- Hai-Wang Lai
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun 130021, China
| | - Zai-Qun Liu
- Department of Organic Chemistry, College of Chemistry, Jilin University, Changchun 130021, China.
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26
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Amorati R, Valgimigli L, Panzella L, Napolitano A, d’Ischia M. 5-S-Lipoylhydroxytyrosol, a Multidefense Antioxidant Featuring a Solvent-Tunable Peroxyl Radical-Scavenging 3-Thio-1,2-dihydroxybenzene Motif. J Org Chem 2013; 78:9857-64. [DOI: 10.1021/jo401522q] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Riccardo Amorati
- Department
of Chemistry “G. Ciamician”, University of Bologna, Via S. Giacomo 11, I-40126 Bologna, Italy
| | - Luca Valgimigli
- Department
of Chemistry “G. Ciamician”, University of Bologna, Via S. Giacomo 11, I-40126 Bologna, Italy
| | - Lucia Panzella
- Department
of Chemical Sciences, University of Naples “Federico II”, Via Cintia 4, I-80126, Naples, Italy
| | - Alessandra Napolitano
- Department
of Chemical Sciences, University of Naples “Federico II”, Via Cintia 4, I-80126, Naples, Italy
| | - Marco d’Ischia
- Department
of Chemical Sciences, University of Naples “Federico II”, Via Cintia 4, I-80126, Naples, Italy
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27
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Prabha K, Prasad KJR. Dinaphthonaphthyridines – a class of novel molecules with potent antioxidant and anticancer activity. MEDCHEMCOMM 2013. [DOI: 10.1039/c2md20270k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Haya L, Osante I, Mainar AM, Cativiela C, Urieta JS. Intramolecular hydrogen-bonding activation in cysteines: a new effective radical scavenger. Phys Chem Chem Phys 2013; 15:9407-13. [DOI: 10.1039/c3cp50743b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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Marcantoni E, Cipolletti R, Marsili L, Menichetti S, Properzi R, Viglianisi C. An Efficient Catalytic Method for Regioselective Sulfenylation of Electron-Rich Aza-Aromatics at Room Temperature. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201100] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Viglianisi C, Bonaccorsi P, Simone L, Nassini L, Menichetti S. Copper-Mediated One-Pot Access to Benzo[b][1,4]thiazines from 2-N-Sulfonylaminoaryl Disulfides. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200023] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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31
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Amorati R, Valgimigli L. Modulation of the antioxidant activity of phenols by non-covalent interactions. Org Biomol Chem 2012; 10:4147-58. [DOI: 10.1039/c2ob25174d] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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