Results 31 to 40 of about 6,174 (259)

In vitro evaluation of the effect of C-4 substitution on methylation of 7,8-dihydroxycoumarin: metabolic profile and catalytic kinetics [PDF]

open access: yesRoyal Society Open Science, 2018
Daphnetin (7,8-dihydroxycoumarin (7,8-DHC)) and its C-4 derivatives have multiple pharmacological activities, but the poor metabolic stability of these catechols has severely restricted their application in the clinic.
Yang-Liu Xia   +5 more
doaj   +1 more source

Kinetic Study of the Oxidation of Catechols in the Presence of N-Methylaniline

open access: yesJournal of Chemistry, 2013
The reactions of electrochemically generated o-quinones from oxidation of catechol and 4-methylcatechol as Michael acceptors with N-methylaniline as nucleophile have been studied using cyclic voltammetry.
Lida Khalafi   +3 more
doaj   +1 more source

Pro- and Anti-oxidant Properties of Redox-Active Catechol-Chitosan Films

open access: yesFrontiers in Chemistry, 2019
Catechols are abundant in nature and are believed to perform diverse biological functions that include photoprotection (e.g., melanins), molecular signaling (e.g., catecholamine neurotransmitters), and mechanical adhesion (e.g., mussel glue).
Eunkyoung Kim   +7 more
doaj   +1 more source

Mussel‐Inspired Polyglycerol Coatings for Surface Modification with Tunable Architecture

open access: yesAdvanced Materials Interfaces, 2023
Mussel‐inspired coatings, known for their outstanding substrate‐independent adhesive capabilities, have numerous potential applications in materials science and biomedical fields.
Peng Tang   +5 more
doaj   +1 more source

Electrooxidation of Catechols in the Presence of Sulfite: Presentation of a Facile and Green Method for Aromatic Sulfonation

open access: yesInternational Journal of Electrochemical Science, 2007
Electrochemical oxidation of catechols (1a-e) has been studied in the presence of sulfite ion (3) as nucleophile in aqueous solution, using cyclic voltammetry and controlled-potential coulometry. The results indicate the participation of catechols (1a-e)
D. Nematollahi, E. Tammari, H. Karbasi
doaj   +1 more source

Digital Simulation of the Cyclic Voltammetric Study of the Catechols Electrooxidation in the Presence of Thiourea

open access: yesInternational Journal of Electrochemical Science, 2011
The present work explains the electrochemical behavior of catechols in the presence of thiourea as a nucleophile in aqueous solution, by means of cyclic voltammetry and controlled-potential coulometry.
Bahram Dowlati   +2 more
doaj   +1 more source

Boronate Derivatives of Functionally Diverse Catechols: Stability Studies

open access: yesMolecules, 2010
Benzeneboronate of catecholic carboxyl methyl esters, N-acetyldopamine, coumarin and catechol estrogens were prepared as crystalline derivatives in high yield.
Kamal Aziz Ketuly, A. Hamid A. Hadi
doaj   +1 more source

Polyphenol-Hydroxylating Tyrosinase Activity under Acidic pH Enables Efficient Synthesis of Plant Catechols and Gallols

open access: yesMicroorganisms, 2021
Tyrosinase is generally known as a melanin-forming enzyme, facilitating monooxygenation of phenols, oxidation of catechols into quinones, and finally generating biological melanin.
Hanbit Song   +6 more
doaj   +1 more source

A Novel Catechol Oxidase Enzyme Electrode for the Specific Determination of Catechol

open access: yesBioscience, Biotechnology, and Biochemistry, 1998
An enzyme electrode for the specific determination of catechol was developed by using catechol oxidase (EC 1.10.3.1) from eggplant (Solanum melangena L.) in combination with a dissolved oxygen probe. Optimization studies of the prepared catechol oxidase enzyme electrode established a phosphate buffer 50 mM at pH 7.0 and 35°C to provide the optimum ...
Dinckaya, E   +5 more
openaire   +3 more sources

An Experimental Validated Computational Method for pKa Determination of Substituted 1,2-Dihydroxybenzenes

open access: yesFrontiers in Chemistry, 2018
1,2-dihydroxybenzenes (DHBs) are organic compounds which are widely studied as they are applied to advanced oxidation processes (AOPs). These compounds are also related to the development of oxidative stress, wood biodegradation, and neuronal disease in ...
Romina Romero   +5 more
doaj   +1 more source

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