Academic literature on the topic 'Hydroxy Salicylic Acids'

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Journal articles on the topic "Hydroxy Salicylic Acids"

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Kuzma, Mónika, Nikoletta Kovács, Lilla Sziva, Gábor Maász, Péter Avar, and Pál Perjési. "Oxidation of Hydroxy- and Dihydroxybenzoic Acids Under the Udenfriend's Conditions. An HPLC Study." Open Medicinal Chemistry Journal 12, no. 1 (2018): 13–22. http://dx.doi.org/10.2174/1874104501812010013.

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Background:Non-enzymatic hydroxylation of aromatic compounds to the respective phenolic derivatives is a possible metabolic pathway of xenobiotics. The formed metabolites can undergo consecutive oxidative reactions with free radicals to form potential toxic molecules.Objective:Development of HPLC methods to separate, identify and quantitate the main products formed from salicylic acid, 2,3-dihydroxybenzoic acid and 2,5-dihydroxybenzoic acid underin vitrohydroxylation conditions (Udenfriend's system).Method:An RP-HPLC-UV-Vis method was developed to separate salicylic acid and isomeric dihydroxy
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Pechinskii, S. V., A. G. Kuregyan, and E. T. Oganesyan. "Regioselective synthesis of quercetin and myricetin derivatives." Журнал общей химии 93, no. 2 (2023): 179–87. http://dx.doi.org/10.31857/s0044460x23020038.

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A regioselective method for the synthesis of esters of quercetin and myricetin at the hydroxy group in the 3 position was developed. As acids participating in the esterification reaction, 2-hydroxybenzoic (salicylic), 4-hydroxybenzoic, 2,6-dihydroxybenzoic, 3,4-dihydroxybenzoic (procatechuic), 3,4,5-trihydroxybenzoic (gallic) acids were used. A new series of quercetin and myricetin esters were obtained.
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A., SYAMAL, and KUMAR D. "Bromate-Bromide Mixture as a Titrimetric Reagent for the Determination of some ortho-Hydroxyaldehydes, Acids, Hydrazides, Schiff Bases and their Metal Complexes." Journal of Indian Chemical Society Vol. 65, Feb 1988 (1988): 112–16. https://doi.org/10.5281/zenodo.6035200.

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Department of Chemistry, Regional Engineering College, Kukshetra-182 119 Department of Applied Sciences and Humanities, Kurukshetra University, Kurukshetra-192 119 <em>Manuscript received 28 January 1982, messed 18 January 1985, accepted 11 September 1985</em> The quantitative determination of salicylaldehyde, 5-chloro-, 5-bromo-, 5-nitro-, 5-methoxy-, 5-hydroxy-, 4-methoxy-, 4-hydroxy-, 3-ethoxy-, 3-hydroxy&shy; and 3,5-dichloro-salicylaldehydes, and 2-hydroxy-1-naphthaldehyde, salicylic acid, 5-chloro-, 5-bromo-, 5-nitro-, 5-hydroxy-, 4-hydroxy-, 3-hydroxy-, and 3,5-dichloro&shy;salicylic ac
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Saxena, Vishal, and Krishana Yadav. "Glycolic Acid, Lactic Acid, Mandelic Acid, Salicylic Acid, Citric Acid, Gluconolactone: Skin Exfoliators in Combination Therapy of Acne Vulgaris." International Journal of Research in Engineering, Science and Management 3, no. 10 (2020): 54–55. http://dx.doi.org/10.47607/ijresm.2020.334.

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Facial acne are a recurring issue in most of the population and can cause disturbing skin issues. A combination of Alpha-hydroxy acids, Beta-hydroxy-acids and Poly-hydroxy acids has become popular for treating acne vulgaris in last few years. The main objective of this research study is to evaluate the efficacy &amp; safety of combination of these acids in the treatment of acne vulgaris. The study was conducted on 12 volunteers having mild to moderate to severe acne. They were divided into 3 groups according to the severity of their facial acne. Members of each group were treated with a series
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Krzaczek, Tadeusz, Anna Bogucka-Kocka, and Renata Śnieżko. "The phenolic acids of some species of the Oenothera L. genus." Acta Societatis Botanicorum Poloniae 64, no. 1 (2014): 41–44. http://dx.doi.org/10.5586/asbp.1995.007.

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The occurence and approximative quantitative proportions of the phenolic acids in four species of the &lt;i&gt;Oenothera&lt;/i&gt; L. genus was determined by the method of TLC and HPLC. In all species of &lt;i&gt;Oenothera&lt;/i&gt; L. genus the permanent occurrence of acids: 2-hydroxy-4-metoxybenzoic, salicylic, ferulic, syringic, vanillic, p-coumaric, p-hydroxybenzoic, p-hydroxyphenylacetic, γ-rezorcil, gentysic, protocatechuic, caffeic and gallic has been confirmed. Whereas the other phenolic acids: o-coumaric, o-hydroxyphenylacetic and pirocatechuic were found in some species of the &lt;i&
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Sergeev, E. E., Yu A. Rodikova, and E. G. Zhizhina. "Methods for the synthesis of salicylic acid. A review." Kataliz v promyshlennosti 23, no. 6 (2023): 52–69. http://dx.doi.org/10.18412/1816-0387-2023-6-52-69.

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The review considers and analyzes methods for the synthesis of salicylic acid based on phenol, ortho-cresol, and benzoic acid reported in scientific and technical literature. The current trends in the progress of the “Kolbe–Schmitt process”-oriented technology (obtaining aromatic and heteroaromatic hydroxy acids by the action of CO2 on alkali metal phenolates) are shown. Data are presented on the effect of catalytic system composition and conditions of benzoic acid hydroxylation on the achieved values of conversion, selectivity, and purity of the product. The review can be useful in choosing a
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Miltojevic, Ana, and Niko Radulovic. "Complete assignment of 1H- and 13C-NMR spectra of anthranilic acid and its hydroxy derivatives and salicylic acid and its amino derivatives." Facta universitatis - series: Physics, Chemistry and Technology 13, no. 2 (2015): 121–32. http://dx.doi.org/10.2298/fupct1502121m.

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We report on the detailed NMR spectral analyses of amino- or/and hydroxy-substituted benzoic acids: anthranilic (AA), 3-hydroxyanthranilic (3-HAA), 5-hydroxyanthranilic (5-HAA), salicylic (SA), 4-aminosalicylic (4-ASA) and 5-aminosalicylic (5-ASA) acids. According to a literature survey, there are limited, unassigned or even incorrectly assigned spectral data to these benzoic acid derivatives. In order to amend the situation, a complete assignment of 1H- and 13C-NMR spectra of these compounds, recorded in perdeuteriodimethyl sulfoxide (DMSO-d6), based on a combination of 1D- and 2D-NMR experim
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Adamczak, Artur, Marcin Ożarowski, and Tomasz M. Karpiński. "Antibacterial Activity of Some Flavonoids and Organic Acids Widely Distributed in Plants." Journal of Clinical Medicine 9, no. 1 (2019): 109. http://dx.doi.org/10.3390/jcm9010109.

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Among natural substances widespread in fruits, vegetables, spices, and medicinal plants, flavonoids and organic acids belong to the promising groups of bioactive compounds with strong antioxidant and anti-inflammatory properties. The aim of the present work was to evaluate the antibacterial activity of 13 common flavonoids (flavones, flavonols, flavanones) and 6 organic acids (aliphatic and aromatic acids). The minimal inhibitory concentrations (MICs) of selected plant substances were determined by the micro-dilution method using clinical strains of four species of pathogenic bacteria. All tes
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Vorobyev, Stepan, Olga Primerova, and Vladimir Koshelev. "Lactamomethylation of Phenols: Synthesis, In Silico Study of Reactivity and Possible Applications." Chemistry Proceedings 3, no. 1 (2020): 81. http://dx.doi.org/10.3390/ecsoc-24-08408.

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Lactamomethylation of phenols with various substituents was provided by pyrrolidone, valerolactam, caprolactam, and 4-phenylpyrrolidone derivatives. The structures of the target compounds were confirmed by IR and NMR study. The behavior of alkylphenols (2,4-di-tert-butyl- and thymol), diphenols (catechol and hydroquinone), formylphenol (vanillin), and hydroxybenzoic acids (salicylic and resorcylic) in this reaction was compared by quantum-chemical calculations. For several compounds, the energy of dissociation of the ArO-H bond was calculated by quantum-chemical method to reveal their possible
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Pekala, Karolina, Katarzyna Wawrzusiszyn, and Anna Bogucka-Kocka. "Phenolic substances in Ailanthus glandulosa Desf." Current Issues in Pharmacy and Medical Sciences 27, no. 2 (2014): 84–87. http://dx.doi.org/10.2478/cipms-2014-0019.

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Abstract The aim of this work was the isolation and identification of phenolic acids from fruit and leaves of Ailanthus glandulosa Desf. The methods used in the isolation and identification of the compounds were: isolation of phenolic acids modified by Ibrahim and Towers, acidic and alkaline hydrolysis by Schmidtlein and Herrmann and identification of phenolic acids in the isolated fraction of two-dimensional thin layer chromatography (TLC) on cellulose plates. In the course of the study, the presence of phenolic acids in leaves and fruit of Ailanthus glandulosa Desf was confirmed. Overall, pr
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Book chapters on the topic "Hydroxy Salicylic Acids"

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Kaur, Harparkash, and Barry Halliwell. "Salicylic acid and phenylalanine as probes to detect hydroxyl radicals." In Free Radicals. Oxford University PressOxford, 1996. http://dx.doi.org/10.1093/oso/9780199635603.003.0007.

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Abstract It is now widely accepted that reactive oxygen species (ROS) and reactive nitrogen species (RNS) (including free radicals) are involved in the pathogenesis of several inflammatory and degenerative disease states (for a recent review see ref. 1). In spite of their existence these species have not as yet been measured in clinical diagnosis. This is partly due to the lack of agreed formats and standardized methodology for measuring oxidative stress and/or levels of free radicals in humans.
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