Kinetics of Oxidation of L-Valine by a Copper(III) Periodate Complex in Alkaline Medium

Sharanabasamma, K.; Angadi, Mahantesh A.; Salunke, Manjalee S.; Tuwar, Suresh M.

doi:10.1007/s10953-011-9772-5

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…Further oxidation of the radical in the fast step resulted in the product methionine sulfoxide. 129 The same reaction catalysed by Ru(III) was first order in Ru(III), had a fractional order in OH − , and slowed with increasing methionine concentrations. The proposed mechanism suggested the formation of a complex between [Ru(H 2 O) 5 OH] 2+ , the reactive Ru(III) species, and Meth.…”

Section: N Fementioning

confidence: 98%

“…130 The outer-sphere Ru(III)-catalysed oxidation of l-proline to glutamic acid was first order in Ru(III), fractional order in OH − , and of zero order in proline. 131 The oxidation of serine and threonine was first order in amino acid and zero order in OH − . The reactivities of serine and threonine were rationalized in terms of the inductive effect.…”

Section: N Fementioning

confidence: 99%

“…274 Cinnamyl cinnamate derivatives were obtained in good to excellent yields by esterification of α,β-unsaturated aldehydes, including aromatic aldehydes, with cinnamyl bromides in the presence of DBU, K 2 CO 3 , THF, and t-BuOH using either atmospheric O 2 or MnO 2 as the oxidant and N-heterocyclic carbene (NHC) as the catalyst. The use of 18 275 The synthesis of isoindolinones (128) from N-tosylbenzamides (129) and t-butyl acrylate was achieved in high yields using O 2 as oxidant and Pd(OAc) 2 as catalyst in the presence of 4,7-diphenyl-1,10-phenanthroline and toluene. Aliphatic alkenes with electron-rich and electron-deficient alkenes or conjugated alkenes could also be used.…”

Section: Triplet Oxygen and Autoxidationmentioning

confidence: 99%

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Oxidation and Reduction

Mehrotra

2014

Organic Reaction Mechanisms Series

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Section: N Fementioning

confidence: 98%

Section: N Fementioning

confidence: 99%

Section: Triplet Oxygen and Autoxidationmentioning

confidence: 99%

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Oxidation and Reduction

Mehrotra

2014

Organic Reaction Mechanisms Series

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“…Deamination and decarboxylation in the chromium(III)-catalysed oxidation of L-valine by alkaline permanganate and analysis of chromium(III) in microscopic amounts by a kinetic method was studied by Kulkarni and coworkers [10] .Kinetic and mechanistic studies of oxidation of glycine and valine by Nbromosuccinimide using chloro complex of Rh(III) in its nano-concentration range as homogeneous catalyst investigated by Singh et al [11] .Kinetics and mechanisms of the permanganate oxidation of L-valine in neutral aqueous solutions was studied by Perez-benito et al [12] . Bahrami [13] had investigated kinetics and mechanism of the oxidation of L-amino-n-butyric acid in moderately concentrated sulfuric acid medium.Studies in the kinetics of oxidation of some amino acids like glycine, alanine, phenylalanine, serine, threonine, aspartic and glutamic acid by KMnO 4 in a moderately concentrated H 2 SO 4 medium in the presence and absence of Ag + has been carried out by number of workers [14][15] .…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies in the surfactant catalyzed oxidative deamination and decarboxylation of L-Valine by permanganate in sulphuric acid medium

Bende¹,

Yadav²,

Chourey³

et al. 2014

IOSRJAC

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“…Ion exchange Not suitable for high concentration [15] In the present study the oxidation of 2-aminophenol by HCF (III) ions in aqueous alkaline medium has been studied. HCF (III) is an easily available and cheap oxidant which acts through electron transfer reaction [16][17]. The product of this oxidative reaction gives a coupling product of 2-aminophenol and named as 2aminophenoxazin-3-one (2-AHP).…”

mentioning

confidence: 99%

A Kinetic and Mechanistic Study of Oxidative Degradation of 2-Aminophenol in Aqueous Alkaline Medium and Antimicrobial Study of Degradation Product 2-Aminophenoxazin-3-One

Goel¹,

Rani²

2022

J. Mex. Chem. Soc.

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Abstract. The oxidation reaction of a model environmental pollutant, 2-AP to 2-aminophenoxazin-3-one initiated by hexacyanoferrate (III) ion, abbreviated (HCF (III), has been investigated at 25 °C. The 2-aminophenoxazin-3-one (2-AHP) acts as a good antibacterial agent. The experimental data, within the pH range 7.5 to 10 were analyzed. The oxidation of 2-aminophenol was followed kinetic- spectrophotometrically and the initial rates were determined using plane mirror method. The effect of temperature variation on the overall rates was studied at pH = 9 within the range 298-313 K and the corresponding activation energy were evaluated. The rate constant, activation energy, enthalpy, entropy, pre-exponential factor and free energy are: kobs = 11.7 x 10-5 min-1, Ea# = 8.24 kcal/mol, ΔH# = 7.63 kcal/mol, ΔS# = -31.5 e.u, A = 23.7 L mol-1 s-1 and ΔF# = 17.2 kcal /mol. The oxidized product 2-aminophenoxazin-3-one was identified by the FTIR and GC-MS methods of analysis. Antimicrobial activity study of product (2-AHP) with gram positive (S. aureus) and gram-negative bacteria (E. coli) by Agar well diffusion method has been made. The study reveals that antibacterial activity of 2-AHP is more for Staphylococcus aureus (gram positive bacteria) as compared to E. coli (gram negative) bacteria. Thus, the present method is simple, efficient and environmentally friendly for the degradation of 2-aminophenol. Resumen. Se investigó a reacción de oxidación de un contaminante ambiental modelo, el 2-aminofenol a 2-aminofenoxazin-3-ona (2-AHP) iniciada por el ion hexacianoferrato (III), (HCF (III), a 25 °C, compuesto que actúa como un buen agente antibacteriano. Se analizaron los datos experimentales, dentro del rango de pH de 7,5 a 10. La cinética de la oxidación del 2-aminofenol se siguió espectrofotométricamente y la rapidez inicial se determinó utilizando el método de espejo plano. Se estudió el efecto de la variación de la temperatura sobre rapidez de reacción global a pH = 9, dentro del rango de temperatura de 298 a 313 K y se evaluó la energía de activación correspondiente. La constante de rapidez, la energía de activación, la entalpía, la entropía, el factor preexponencial y la energía libre para esta reacción son: kobs = 11,7 x 10-5 min-1, Ea#= 8,24 kcal/mol, ΔH# = 7,63 kcal/mol, ΔS# = -31,5 e.u, A = 23,7 l/mol/s y ΔF# = 17,2 kcal/mol. El producto oxidado, el 2-AHP, fue identificado por los métodos de análisis FTIR y GC-MS. Su actividad antimicrobiana fue evaluada frente a S. aureus (gram positivo) y bacterias gram negativas (E. coli) mediante el método de difusión en pozos de agar. El estudio revela que la actividad antibacteriana de 2-AHP es mayor para S. aureus en comparación con la bacteria E. coli. Por tanto, el presente método es simple, eficiente y respetuoso con el medio ambiente para la degradación de 2-aminofenol.

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Kinetics of Oxidation of L-Valine by a Copper(III) Periodate Complex in Alkaline Medium

Cited by 5 publications

References 18 publications

Oxidation and Reduction

Oxidation and Reduction

Kinetic studies in the surfactant catalyzed oxidative deamination and decarboxylation of L-Valine by permanganate in sulphuric acid medium

A Kinetic and Mechanistic Study of Oxidative Degradation of 2-Aminophenol in Aqueous Alkaline Medium and Antimicrobial Study of Degradation Product 2-Aminophenoxazin-3-One

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