Cooxidation reactions of ascorbic acid

1979 ◽  
Vol 44 (10) ◽  
pp. 2893-2903 ◽  
Author(s):  
Eva Schwertnerová ◽  
Dana M. Wagnerová ◽  
Josef Vepřek-Šiška
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Salicylic Acid ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Catalytic Effect ◽  
Metal Chelates ◽  
Dihydroxybenzoic Acid ◽  
Reaction Intermediate ◽  
Kinetics Of

Catalytic oxidation of salicylic acid by molecular oxygen, induced by the oxidation of ascorbic acid, leads to the formation of a mixture of isomers of dihydroxybenzoic acid. The reaction is catalyzed by a series of metal chelates, especially Fe(II) and Co(II), the most marked catalytic effect having been found in the case of tetrasulphophthalocyanine of cobalt (CoTSP). The kinetics of the oxidation of ascorbic acid in the presence of salicylic acid was followed, and the formation of hydrogen peroxide as reaction intermediate was proved.

Biomimetic flavin-catalysed reactions for organic synthesis

2015 ◽  
Vol 13 (28) ◽  
pp. 7599-7613 ◽  
Author(s):  
H. Iida ◽  
Y. Imada ◽  
S.-I. Murahashi
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Oxidation ◽  
Molecular Oxygen ◽  
Organic Synthesis ◽  
Environmentally Benign ◽  
Wide Scope ◽  
Biomimetic Catalysts ◽  
Mild Conditions ◽  
Related Compounds

Using simple riboflavin related compounds as biomimetic catalysts, catalytic oxidation of various substrates with hydrogen peroxide or molecular oxygen can be performed selectively under mild conditions. The principle of these reactions is fundamental and will provide a wide scope for environmentally benign future practical methods.

Photochemical Hydroxylation of Salicylic Acid with Hydrogen Peroxide; Mechanistic Study of Substrate Sensitized Reaction

1996 ◽  
Vol 61 (12) ◽  
pp. 1729-1737 ◽  
Author(s):  
Kamil Lang ◽  
Jiřina Brodilová ◽  
Stanislav Luňák
Keyword(s):  
Hydrogen Peroxide ◽  
Salicylic Acid ◽  
Quantum Yields ◽  
Mechanistic Study ◽  
Isomer Ratio ◽  
Dihydroxybenzoic Acid ◽  
Effect Of Ph ◽  
Product Ratio

The photochemical hydroxylation of salicylic acid (SA) by hydrogen peroxide proceeds via the same intermediate independently of the excited reactant (i.e. SA or H2O2). This conclusion is supported by the similar effect of pH on the quantum yields and on the isomer ratio of formed products: 2,3-dihydroxybenzoic acid (2,3-DHB) and 2,5-dihydroxybenzoic acid (2,5-DHB). The product ratio ([2,3-DHB]/[2,5-DHB]) is not affected by H2O2 concentration.

Kinetics of mercapto (SH) with nitrogen dioxide, ozone, molecular oxygen, and hydrogen peroxide

1985 ◽  
Vol 89 (25) ◽  
pp. 5505-5510 ◽  
Author(s):  
Randall R. Friedl ◽  
William H. Brune ◽  
James G. Anderson
Keyword(s):  
Hydrogen Peroxide ◽  
Nitrogen Dioxide ◽  
Molecular Oxygen ◽  
Kinetics Of

Microcalorimetric investigation on the kinetics of the oxidation of ascorbic acid with hydrogen peroxide

2010 ◽  
Vol 22 (6) ◽  
pp. 515-520 ◽  
Author(s):  
Xiang-Guang Meng ◽  
Xing-Ming Kou ◽  
Jia-Qing Xie ◽  
Juan Du ◽  
Xian-Cheng Zeng
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Kinetics Of

The Role of Hydrogen Peroxide in Dioxygen Induced Hydroxylation of Salicylic Acid

1994 ◽  
Vol 59 (11) ◽  
pp. 2447-2453 ◽  
Author(s):  
Kamil Lang ◽  
Dana M. Wagnerová ◽  
Jiřina Brodilová
Keyword(s):  
Hydrogen Peroxide ◽  
Salicylic Acid ◽  
Molecular Oxygen ◽  
Fenton Reaction ◽  
Radical Scavengers

The photochemically initiated oxidation of salicylic acid by molecular oxygen in the presence of [Fe(C2O4)3]3- leads to a mixture of 2,3- and 2,5-dihydroxybenzoic acids. Iron(II) generated by the photoreduction is reoxidized by dioxygen. Hydrogen peroxide formed in this reaction takes part in the Fenton reaction in the presence of Fe(II). Experiments with OH. radical scavengers document the role of the radicals in the photochemical and thermal hydroxylation of salicylic acid.

Kinetics of the catalytic oxidation of model compounds of lignin with hydrogen peroxide in the presence of peroxidase from horse-radish

2010 ◽  
Vol 84 (9) ◽  
pp. 1511-1515
Author(s):  
K. G. Bogolitsyn ◽  
M. A. Aizenshtadt ◽  
A. N. Pryakhin ◽  
V. V. Lunin ◽  
S. A. Pokryshkin
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Oxidation ◽  
Model Compounds ◽  
Kinetics Of

scholarly journals Induction of Heat Tolerance in Maize through Exogenous Application of Salicylic Acid, Ascorbic Acid and Hydrogen Peroxide in a Field Study

2020 ◽  
Vol 33 (3) ◽  
Author(s):  
Muhammad Mazhar Iqbal ◽  
Ijaz Ahmad ◽  
Shahzad Maqsood Ahmed Basra ◽  
Abu Baker Ijaz ◽  
Zahid Hassan Tarar ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Ascorbic Acid ◽  
Salicylic Acid ◽  
Field Study ◽  
Heat Tolerance ◽  
Exogenous Application
Sign in / Sign up

Export Citation Format

Share Document