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de Azevedo AM, de Araujo JGL, da Silva MDSB, Dos Anjos ASD, de Araújo AMM, Dos Santos EV, Martínez-Huitle CA, Gondim AD, Cavalcanti LN. Photocatalyzed hydrodecarboxylation of fatty acids: a prospective method to produce drop-in biofuels. RSC Adv 2024; 14:10755-10760. [PMID: 38572344 PMCID: PMC10988281 DOI: 10.1039/d4ra01166j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 03/27/2024] [Indexed: 04/05/2024] Open
Abstract
A direct and practical method for photocatalyzed hydrodecarboxylation of fatty acids is reported herein. The catalytic system consists of a commercially available acridinium salt as the photocatalyst and thiophenol as the Hydrogen Atom Transfer (HAT) co-catalyst. Results evidenced that Cn-1 alkanes were obtained in yields up to 77%. Furthermore, the protocol was employed for a complex mixture of fatty acids bio-derived from a real sample of licuri oil to obtain hydrocarbons in the range of C9-C17 with high selectivity and excellent conversion (>90%). This work provides a powerful strategy for producing drop-in biofuels under mild conditions. Finally, an energetic assessment of our proposed protocol (∼22.9 kW h) reveals the benefit of a sustainable production of renewable hydrocarbons.
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Affiliation(s)
- Amanda M de Azevedo
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | - Jhudson G L de Araujo
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | - Maria do S B da Silva
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | - Aecia S D Dos Anjos
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | - Aruzza M M de Araújo
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | - Elisama V Dos Santos
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | | | - Amanda D Gondim
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
| | - Lívia N Cavalcanti
- Federal University of Rio Grande do Norte, Institute of Chemistry 59072-970 Natal RN Brazil
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Todorov P, Georgieva S, Tchekalarova J, Peneva P, Mateeva P, Assenov B, Dzhambazova E, Pechlivanova D. Synthesis, characterization and evaluation of anti-hyperalgesia, anticonvulsant and antioxidant activity of novel VV-hemorphin-5 analogs. Arch Pharm (Weinheim) 2023; 356:e2300267. [PMID: 37532631 DOI: 10.1002/ardp.202300267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 07/04/2023] [Accepted: 07/17/2023] [Indexed: 08/04/2023]
Abstract
Two series of new VV-hemorphin-5 analogs with structures Val-Val-Tyr-Xxx-Trp-Thr-Gln-NH2 and Adam-Val-Val-Tyr-Xxx-Trp-Thr-Gln-NH2 , where Xxx is Ac5c (1-aminocyclopentane-1-carboxylic acid), Ac6c (1-aminocyclohexane-1-carboxylic acid), Ac7c (1-aminocycloheptane-1-carboxylic acid), and Adam is the low-molecular-weight lipophilic adamantyl building block, were synthesized, characterized electrochemically and evaluated for antioxidant, anti-hyperalgesia, and anticonvulsant activity. The design of the compounds followed the strategy to improve the propensity for aqueous solubility and/or to increase their affinity for the target receptor or enzyme. The partition coefficient value shows that the peptide scaffold goes from hydrophilic to lipophilic with the increasing size of the cycloalkane ring and even more with the introduction of the adamantane. The peptides C5-V and C7-V were the only analogs that provoked an immediate antinociceptive effect changing the mechanical pain threshold. The six new peptide analogs produced a significant and long-lasting carrageenan model of inflammatory pain in rats. While the adamantane hemorphin analog Ad7-V was the only compound with the potency to suppress psychomotor seizures in the 6-Hz test, the C6-V and Ad6-V exhibited protective activity against the seizure spread in the maximal electroshock seizure test in mice. The active analogs did not show neurotoxicity or sedative effects. Our results revealed a structure-related specific activity of a newly designed hemorphin analog that could be used as a template for future modification and preparation of compounds with potential analgesic and anticonvulsant activity.
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Affiliation(s)
- Petar Todorov
- Department of Organic Chemistry, University of Chemical Technology and Metallurgy, Sofia, Bulgaria
| | - Stela Georgieva
- Department of Analytical Chemistry, University of Chemical Technology and Metallurgy, Sofia, Bulgaria
| | - Jana Tchekalarova
- Department of Organic Chemistry, University of Chemical Technology and Metallurgy, Sofia, Bulgaria
- Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Petia Peneva
- Department of Organic Chemistry, University of Chemical Technology and Metallurgy, Sofia, Bulgaria
| | - Polina Mateeva
- Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Borislav Assenov
- Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
- Faculty of Medicine, Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
| | - Elena Dzhambazova
- Faculty of Medicine, Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
| | - Daniela Pechlivanova
- Institute of Neurobiology, Bulgarian Academy of Sciences, Sofia, Bulgaria
- Faculty of Medicine, Sofia University "St. Kliment Ohridski", Sofia, Bulgaria
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Complex Activity and Sensor Potential toward Metal Ions in Environmental Water Samples of N-Phthalimide Azo-Azomethine Dyes. Molecules 2021; 26:molecules26195885. [PMID: 34641430 PMCID: PMC8513033 DOI: 10.3390/molecules26195885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Revised: 09/16/2021] [Accepted: 09/21/2021] [Indexed: 11/22/2022] Open
Abstract
Herein, the spectral and electrochemical characterizations of three different substituted N-phthalimide azo-azomethine (NAA) dyes (L) containing an o-hydroxy group and their NAA-M(II) chelates [M(II): Cu, Ni, Co, Pb] were reported by using UV–Vis and fluorescence spectroscopy and potentiometric and voltamperometric techniques. The pK value of the dyes as well as the stoichiometry and stability of the NAA-metal chelates were studied, and the stoichiometry was found to be mostly 1:2 (ML2) with high complex stability constant values. The sensor activity of N-phthalimide azo-azomethine derivatives toward pH and metal ions has been also investigated and tested for indicator application in acid–base analysis and detection of Cu(II) ions in real samples of surface river water using voltamperometric detection. The results showed that one of the ligands possesses the highest electrochemical response upon binding to copper ions and could be successfully used in the analysis of copper in water at a concentration range of the analyte from 3.7 × 10−7 to 5.0 × 10−6 mol L−1, with analytical characteristics of the method being Sr = 1.5%, LOD = 3.58 µg L−1 and LOQ =11.9 µg L−1
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Snigur D, Fizer M, Chebotarev A, Lukianova O, Bevziuk K. Protonation of quinoline yellow WS in aqueous solutions: Spectroscopic and DFT theoretical studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Gemili M, Nural Y, Keleş E, Aydıner B, Seferoğlu N, Şahin E, Sarı H, Seferoğlu Z. Novel 1,4-naphthoquinone N-aroylthioureas: Syntheses, crystal structure, anion recognition properties, DFT studies and determination of acid dissociation constants. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.08.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Banda-Alemán JA, Orozco G, Bustos E, Sepúlveda S, Manríquez J. Double-layer effect on the kinetics of CO2 electroreduction at cathodes bearing Ag, Cu, and Ag/Cu nano-arrays electrodeposited by potentiostatic double-pulse. J CO2 UTIL 2018. [DOI: 10.1016/j.jcou.2018.08.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bevziuk K, Chebotarev A, Fizer M, Klochkova A, Pliuta K, Snigur D. Protonation of Patented Blue V in aqueous solutions: theoretical and experimental studies. J CHEM SCI 2018. [DOI: 10.1007/s12039-017-1411-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Matyjaszczyk K, Kolonko M, Gonciarz-Dytman A, Oszczapowicz I, Łukawska M, Jawień W, Chlopicki S, Walczak M. Effects of structural modification of the daunosamine moiety of anthracycline antibiotics on pKa values determined by capillary zone electrophoresis. J Chromatogr B Analyt Technol Biomed Life Sci 2017; 1060:44-52. [DOI: 10.1016/j.jchromb.2017.04.038] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 04/20/2017] [Accepted: 04/22/2017] [Indexed: 01/14/2023]
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Investigation of the acid-base and electromigration properties of 5‐azacytosine derivatives using capillary electrophoresis and density functional theory calculations. J Chromatogr A 2017; 1479:185-193. [DOI: 10.1016/j.chroma.2016.11.058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 11/25/2016] [Accepted: 11/28/2016] [Indexed: 11/20/2022]
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Ratkova EL, Palmer DS, Fedorov MV. Solvation thermodynamics of organic molecules by the molecular integral equation theory: approaching chemical accuracy. Chem Rev 2015; 115:6312-56. [PMID: 26073187 DOI: 10.1021/cr5000283] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ekaterina L Ratkova
- †G. A. Krestov Institute of Solution Chemistry of the Russian Academy of Sciences, Akademicheskaya Street 1, Ivanovo 153045, Russia.,‡The Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22, Leipzig 04103, Germany
| | - David S Palmer
- ‡The Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22, Leipzig 04103, Germany.,§Department of Chemistry, University of Strathclyde, Thomas Graham Building, 295 Cathedral Street, Glasgow, Scotland G1 1XL, United Kingdom
| | - Maxim V Fedorov
- ‡The Max Planck Institute for Mathematics in the Sciences, Inselstrasse 22, Leipzig 04103, Germany.,∥Department of Physics, Scottish Universities Physics Alliance (SUPA), University of Strathclyde, John Anderson Building, 107 Rottenrow East, Glasgow G4 0NG, United Kingdom
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Zevatskii YE, Samoilov DV. Modern methods for estimation of ionization constants of organic compounds in solution. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2011. [DOI: 10.1134/s1070428011100010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Asuero AG, Michałowski T. Comprehensive Formulation of Titration Curves for Complex Acid-Base Systems and Its Analytical Implications. Crit Rev Anal Chem 2011. [DOI: 10.1080/10408347.2011.559440] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Kortüm G, Vogel W, Andrussow K. Disssociation constants of organic acids in aqueous solution. PURE APPL CHEM 1960. [DOI: 10.1351/pac196001020187] [Citation(s) in RCA: 65] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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