Kinetics and Mechanism of the Oxidation of Vanillin by Hexacyanoferrate(III) in Aqueous Alkaline Medium

Jose, Timy P.; Nandibewoor, Sharanappa T.; Tuwar, Suresh M.

doi:10.1007/s10953-006-8938-z

Cited by 37 publications

(24 citation statements)

References 17 publications

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“…Its role in the metabolism is crucial. It is 29 highly applicable in the production of pharmaceuticals and 30 medicine. Oxidation of L-asparagine has previously been studied 31 in both acidic [5,6,21] and alkaline [7,[18][19][20] media, and the final 32 oxidation products of L-asparagine were identified as a-formyl 33 acetamide, ammonia and carbon dioxide.…”

Section: Introductionmentioning

confidence: 99%

Silver(I) catalysis of oxidative deamination and decarboxylation of l -asparagine and l -histidine by platinum(IV) in perchloric acid solutions: A comparative kinetics study

Asghar

Altass

Fawzy

2016

Journal of Environmental Chemical Engineering

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Section: Introductionmentioning

confidence: 99%

Silver(I) catalysis of oxidative deamination and decarboxylation of l -asparagine and l -histidine by platinum(IV) in perchloric acid solutions: A comparative kinetics study

Asghar

Altass

Fawzy

2016

Journal of Environmental Chemical Engineering

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“…The oxidation of α‐amino acids is of great importance both from chemical point of view and its bearing on the mechanism of amino acids metabolism. They have been oxidized by a variety of reagents under different experimental conditions, and they often undergo oxidative decarboxylation and deamination .…”

Section: Introductionmentioning

confidence: 99%

Kinetics and Mechanistic Approach to the Oxidative Behavior of Biological Anticancer Platinum(IV) Complex toward ‐Asparagine in Acid Medium and the Effect of Copper(II) Catalyst

Fawzy

2014

Int J of Chemical Kinetics

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The catalytic effect of copper(II) ions toward the oxidation of ‐asparagine (Asn) by an anticancer platinum(IV) complex in the form of hexachloroplatinate(IV) (HCP) has been investigated in aqueous acid medium at the constant ionic strength and temperature. The progress of both uncatalyzed and copper(II)‐catalyzed oxidation reactions has been monitored spectrophotometrically. The stoichiometry in both cases is [Asn]/[HCP] = 1:1. The kinetics of both redox reactions is first order with respect to [oxidant] and less than the unit order in [acid]. The order with respect to [Asn]T decreases from unity in the uncatalyzed path to less than unity in the catalyzed one. The catalyzed path is first order in [CuII]T. Increasing ionic strength and dielectric constant decreases the oxidation rates. The final oxidation products of ‐asparagine are identified as the corresponding aldehyde (α‐formyl acetamide), ammonium ion, and carbon dioxide. Tentative mechanisms of both reactions have been suggested. The appropriate rate laws are deduced. The activation parameters of the uncatalyzed reaction have been evaluated and discussed.

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“…The oxidation of lignin into vanillin can produce vanillic acid but is usually accompanied by undesired degradation processes [3,8]. To prepare vanillic acid, the selective oxidation of vanillin is therefore carried out using stoichiometric oxidants, such as chlorite and hexacyanoferrate(III) [9][10][11] or, in few cases, catalytic systems, namely hydrotalcites [5].…”

Section: Introductionmentioning

confidence: 99%

Oxidation of Vanillin with Supported Gold Nanoparticles

et al. 2016

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The selective oxidation of vanillin to vanillic acid was achieved using gold nanoparticles supported on alumina and titania. Selectivities up to 99 % at conversions over 90 % were obtained with pressurized oxygen as green oxidant in alkaline aqueous media. Our studies showed that the addition of at least 2 equivalents of strong Brönsted base had a crucial role in suppressing vanillin degradation and achieving high selectivity and conversion. The highest activities involved turn-over frequency values up to 1300 h -1 and were achieved using alumina supported catalysts.

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Kinetics and Mechanism of the Oxidation of Vanillin by Hexacyanoferrate(III) in Aqueous Alkaline Medium

Cited by 37 publications

References 17 publications

Silver(I) catalysis of oxidative deamination and decarboxylation of l -asparagine and l -histidine by platinum(IV) in perchloric acid solutions: A comparative kinetics study

Silver(I) catalysis of oxidative deamination and decarboxylation of l -asparagine and l -histidine by platinum(IV) in perchloric acid solutions: A comparative kinetics study

Kinetics and Mechanistic Approach to the Oxidative Behavior of Biological Anticancer Platinum(IV) Complex toward ‐Asparagine in Acid Medium and the Effect of Copper(II) Catalyst

Oxidation of Vanillin with Supported Gold Nanoparticles

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