Indirect electrochemical oxidation of aliphatic alcohols to carboxylic acids by active oxygen forms in aqueous media

2011 ◽  
Vol 47 (10) ◽  
pp. 1146-1151 ◽  
Author(s):  
N. V. Chaenko ◽  
G. V. Kornienko ◽  
A. M. Kosheleva ◽  
N. G. Maksimov ◽  
V. L. Kornienko
Keyword(s):  
Electrochemical Oxidation ◽  
Carboxylic Acids ◽  
Aqueous Media ◽  
Active Oxygen ◽  
Aliphatic Alcohols ◽  
Active Oxygen Forms

Oxidation of α-Substituted Carbonyl Compounds to Carboxylic Acids in Aqueous Media Using Ultrasound

1997 ◽  
Vol 27 (9) ◽  
pp. 1601-1605 ◽  
Author(s):  
D. T. C. Yang ◽  
C. J. Zhang ◽  
P. P. Fu ◽  
G. W. Kabalka
Keyword(s):  
Carboxylic Acids ◽  
Carbonyl Compounds ◽  
Aqueous Media

Cationic Pd(II)/bipyridine-catalyzed conjugate addition of arylboronic acids to α,β-unsaturated carboxylic acids in aqueous media

2018 ◽  
Vol 59 (13) ◽  
pp. 1192-1195 ◽  
Author(s):  
Yuxin Ni ◽  
Kaixuan Song ◽  
Kai Shen ◽  
Zhenyu Yang ◽  
Rui Liu ◽  
...  
Keyword(s):  
Carboxylic Acids ◽  
Aqueous Media ◽  
Conjugate Addition ◽  
Arylboronic Acids ◽  
Unsaturated Carboxylic Acids

Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature

2018 ◽  
Vol 73 (9) ◽  
pp. 641-645 ◽  
Author(s):  
Sepehr Sadegh-Samiei ◽  
Shahrzad Abdolmohammadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aqueous Media ◽  
Reaction Times ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Moderate Reaction ◽  
Recyclable Heterogeneous Catalyst

AbstractA novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate reaction conditions (room temperature, aqueous media).

scholarly journals Electrochemical Oxidation of Alcohols and Aldehydes to Carboxylic Acids Catalyzed by 4-Acetamido-TEMPO: An Alternative to “Anelli” and “Pinnick” Oxidations

ACS Catalysis ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 6738-6744 ◽  
Author(s):  
Mohammad Rafiee ◽  
Zachary M. Konz ◽  
Matthew D. Graaf ◽  
Hannes F. Koolman ◽  
Shannon S. Stahl
Keyword(s):  
Electrochemical Oxidation ◽  
Carboxylic Acids ◽  
Oxidation Of Alcohols

scholarly journals Electrochemical oxidation of m-cresol purple dye in aqueous media

2015 ◽  
Vol 50 (4) ◽  
pp. 305-313
Author(s):  
Sajjad Khezrianjoo ◽  
Hosakere Doddarevanna Revanasiddappa
Keyword(s):  
Electrochemical Oxidation ◽  
Applied Voltage ◽  
Supporting Electrolyte ◽  
Aqueous Media ◽  
Degradation Process ◽  
Cell System ◽  
Electrolysis Cell ◽  
System A ◽  
Initial Ph ◽  
Indicator Dye

The present investigation showed that the indicator dye m-cresol purple (mCP) was degraded in a laboratory scale, undivided electrolysis cell system. A platinum anode was used for generation of chlorine in the dye solution. The influence of supporting electrolyte, applied voltage, pH, initial dye concentration and temperature were studied. The ultraviolet-visible spectra of samples during the electrochemical oxidation showed rapid decolorization of the dye solution. During the electrochemical degradation process, dye concentration and current were measured to evaluate the energy consumption and current efficiency. After 10 minutes of electrolysis, a solution containing 20 mg/L mCP showed complete color removal at a supporting electrolyte concentration of 1 g/L NaCl, initial pH 6.7, temperature 25 °C and applied voltage 5 V; however, when pH was kept at 6.7, a higher rate constant was observed. There was good fit of the data to pseudo-first-order kinetics for dye removal in all experiments. Dependence of the decolorization rate on the initial mCP concentration can be described as roα[mCP]o−0.98. The apparent activation energy for the electrochemical decolorization of mCP was determined to be −6.29 kJ/mol.

Oxidation with Nitric Acid of Aliphatic Alcohols and Diols to Carboxylic Acids.

ChemInform ◽  
2007 ◽  
Vol 38 (47) ◽  
Author(s):  
N. V. Svetlakov ◽  
V. G. Nikitin ◽  
E. A. Nikolaeva
Keyword(s):  
Nitric Acid ◽  
Carboxylic Acids ◽  
Aliphatic Alcohols

scholarly journals Smaller, faster, better: modular synthesis of unsymmetrical ammonium salt-tagged NHC–gold(i) complexes and their application as recyclable catalysts in water

2015 ◽  
Vol 13 (31) ◽  
pp. 8556-8560 ◽  
Author(s):  
Katrin Belger ◽  
Norbert Krause
Keyword(s):  
Carboxylic Acids ◽  
Ammonium Salt ◽  
Aqueous Media ◽  
Cyclization Reactions ◽  
Modular Synthesis ◽  
Recyclable Catalysts

Facile access towards unsymmetrical ammonium salt-tagged NHC-gold(i) complexes is described, and their application as recyclable catalysts in cyclization reactions of acetylenic carboxylic acids and amides in aqueous media is demonstrated.

Efficient removal of diuretic hydrochlorothiazide from water by electro-Fenton process using BDD anode: a kinetic and degradation pathway study

2019 ◽  
Vol 16 (8) ◽  
pp. 613 ◽  
Author(s):  
Hélène Monteil ◽  
Nihal Oturan ◽  
Yoan Péchaud ◽  
Mehmet A. Oturan
Keyword(s):  
Electrochemical Oxidation ◽  
Oxidation Reaction ◽  
Oxidation Process ◽  
Aqueous Media ◽  
Degradation Pathway ◽  
Constant Current ◽  
Gas Chromatography Mass Spectrometry ◽  
Aqueous Environment ◽  
Fenton Process ◽  
Kinetic Rate Constant

Environmental contextHydrochlorothiazide, a common diuretic pharmaceutical, occurs in environmental waters because current treatment technologies are unable to eliminate it from wastewater. To remove this environmentally hazardous chemical from water, we developed an advanced electrochemical oxidation process to efficiently degrade and mineralise the compound. Wider application of the process holds the promise of general, efficient destruction of pharmaceuticals in aqueous media. AbstractThe degradation and the mineralisation of the diuretic hydrochlorothiazide were studied by an advanced electrochemical oxidation process, ‘electro-Fenton’, which generates in situ hydroxyl radicals that are able to successfully oxidise or mineralise organic pollutants. In this study, a 0.1mM (29.8mgL−1) hydrochlorothiazide solution was completely oxidatively degraded in 15min under constant current electrolysis at 500 mA. The absolute kinetic rate constant of the oxidation reaction was also determined as (4.37±0.04)×109M−1s−1. The quasi-complete mineralisation of the solution was obtained with electrolysis for 6h under the same applied current. Several oxidation reaction intermediates were identified using gas chromatography-mass spectrometry (GC-MS). The formed carboxylic acids during the mineralisation process were also studied; oxamic, oxalic, acetic and maleic acids were identified and their concentrations were monitored throughout the electrolysis. The ions released during the treatment were also considered. Based on these data and the total organic carbon (TOC) removal results, a possible mineralisation pathway was proposed. These findings enable the conclusion that the electro-Fenton process is an efficient and environmentally-friendly method to eliminate the hazardous drug hydrochlorothiazide from an aqueous environment.

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