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Oxidant

Distribution by Scientific Domains
Chemistry59%
Life Sciences16%
Medical Sciences11%
Polymers and Materials Science8%
3 Other Domains6%
Distribution within Chemistry
Organic Chemistry49%
General & Introductory Chemistry15%
Chemical Engineering6%
22 Other Subdomains30%

Kinds of Oxidant

  • chemical oxidant
  • efficient oxidant
    		•
  • stoichiometric oxidant
  • strong oxidant
    		•
  • terminal oxidant

    • Terms modified by Oxidant

  • oxidant concentration
  • oxidant damage
  • oxidant generation
    		•
  • oxidant injury
  • oxidant production
  • oxidant species
    		•
  • oxidant status
  • oxidant stress

    • Selected Abstracts

    Suitability of Stripping Chronopotentiometry for Heavy Metal Speciation Using Hydrogen Peroxide as Oxidant: Application to the Cd(II)-EDTA-PMA System

    ELECTROANALYSIS, Issue 24 2005
    Núria Serrano
    Abstract The possibilities of stripping chronopotentiometry (SCP) for heavy metal speciation have been tested in the modality of chemical oxidation using the model systems Cd(II)-polyacrylic acid (PMA), Cd(II)-EDTA and Cd(II)-PMA-EDTA. The use of 0.03% H2O2 as a chemical oxidant provides reliable results from transition times, but peak potentials are dramatically affected by the presence of this reagent. The study suggests that chemical-oxidation SCP can be a technique complementary to other stripping modalities in the study of inert and macromolecular labile metal complexes. [source]

    Palladium-Catalyzed Oxidation of Phenyl-Substituted Alkenes using Molecular Oxygen as the Sole Oxidant

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 14-15 2009
    Aline
    Abstract The palladium-catalyzed aerobic oxidation of styrene and 2-vinylnaphthalene in dimethylacetamide/water or dimethylformamide/water solutions under mild conditions has been developed, in which palladium(II) chloride is used in the absence of co-catalysts or special stabilizing ligands as the sole and recyclable catalyst. The corresponding methyl ketones have been obtained in good to excellent yields with low catalyst loadings (0.2,5,mol%) and high turnover numbers (up to ca. 1000 to palladium). This simple and efficient catalytic method represents an ecologically benign and economically attractive synthetic pathway to industrially important compounds used in the manufacture of various polymers and drugs. [source]

    Highly Efficient Halogenation of Organic Compounds with Halides Catalyzed by Cerium(III) Chloride Heptahydrate Using Hydrogen Peroxide as the Terminal Oxidant in Water

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 11-12 2009
    Habib Firouzabadi
    Abstract In this article a new environmentally friendly catalytic method is described for the efficient monoiodination and bromination of arenes and also iodoetherification and iodolactonization of olefins using hydrogen peroxide as the terminal oxidant. The method is based on using sodium iodide or sodium bromide, hydrogen peroxide (35%) and cerium(III) chloride as an effective catalyst in water at room temperature or under reflux conditions. By this protocol, iodination of anilines proceeded with high regioselectivity at the para position with the formation of small amounts of the ortho isomers. However, bromination of anilines proceeded with absolute regioselectivity to give the para isomers as the sole products in high yields. Iodinations and brominations of m -xylene, toluene, chloro- and bromobenzenes were proceeded with excellent regioselectivity to produce the para isomers as the sole products. Benzene was also halogenated by this catalytic system to give the monohalogenated benzene in good yields. Iodoetherification and iodolactonization of olefins also proceeded easily in high yields at room temperature. However, the bromination of olefins by this protocol failed and the starting materials were detected intact. [source]

    Polymer-Supported N -Phenylsulfonyloxaziridine (Davis Reagent): A Versatile Oxidant

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1-2 2009
    Yongnian Gao
    No abstract is available for this article. [source]

    Iminium Salt-Catalysed Asymmetric Epoxidation using Hydrogen Peroxide as Stoichiometric Oxidant

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 11-12 2008
    Philip C. Bulman Page
    Abstract Iminium salt organocatalysts can provide high selectivity and high efficiency in catalytic asymmetric epoxidation. They are normally used in conjunction with Oxone as the stoichiometric oxidant. Oxone, however, has limited stability and is insoluble in most organic solvents; we report here for the first time the development of a reaction system driven by hydrogen peroxide as the stoichiometric oxidant, involving an unusual double catalytic cycle. [source]

    Selective Light Supported Oxidation of Hexoses Using Air as Oxidant , Synthesis of Tetrahydroxyazepanes

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1 2008
    Abdoulaye Gassama
    Abstract Unprotected alkyl glycosides have been oxidized using air as oxidant and copper(I) chloride/TEMPO as the catalytic system. The primary hydroxy group in the 6 position is selectively transformed into an aldehyde equivalent. The process was optimized by irradiation with visible light. Without further purification and with high yields, the resulting lactols have been transformed into tetrahydroxyazepane. [source]

    A High-Yield, Liquid-Phase Approach for the Partial Oxidation of Methane to Methanol using SO3 as the Oxidant

    ADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 9 2005
    Sudip Mukhopadhyay
    Abstract A direct approach for producing methanol from methane in a three-step, liquid phase process is reported. In the first step, methane is reacted with SO3 to form methanesulfonic acid (MSA) at 75,°C using a free-radical initiator and MSA as the solvent. Urea-H2O2 in combination with RhCl3 is found to be the most effective initiator (57% conversion of SO3; 7.2% conversion of CH4). MSA is then oxidized by SO3 at 160,°C in a second step to produce a mixture containing methyl bisulfate and some methyl methanesulfonate (87% conversion of MSA). In the third step, the mixture of methyl bisulfate and methyl methanesulfonate is hydrolyzed in the presence of an organic solvent, to produce an organic phase containing methanol and an aqueous phase containing sulfuric acid and some MSA (63% conversion of methyl bisulfate; 72% conversion of methyl methanesulfonate). Overall, 58% of the MSA (of which 23% is derived from methane) is converted to methanol. [source]

    Oxidative status in iron-deficiency anemia

    JOURNAL OF CLINICAL LABORATORY ANALYSIS, Issue 5 2009
    Jong-Ha Yoo
    Abstract Oxidative stress is an imbalance between free radicals and antioxidant molecules that can play an important role in the pathogenesis of iron-deficiency anemia (IDA). The aim of this study was to investigate oxidative status in patients with IDA and alteration of oxidative status after iron treatment. Thirty-three female patients with IDA and 25 healthy controls were included in this study. Oxidant and total antioxidant capacity were determined using free oxygen radicals test and free oxygen radicals defence (Form CR 3000, Callegari, Parma, Italy). Catalase activity was measured by spectrophotometer using a commercially available kit (Bioxytech Catalase-520, OxisResearch, Portland, OR). Oxidant activity in patients with IDA was significantly higher than controls (P<0.05), while total antioxidant and catalase activity were significantly lower (P<0.05). After treatment, oxidant, antioxidant, and catalase activity reached the levels of the control group, and no significant differences were observed among groups (P>0.05). In conclusion, our data indicate that blood reactive oxygen species was lower and total antioxidant and catalase activity were higher after rather than before treatment in patients with IDA. The results of our study support the higher oxidative stress hypothesis in IDA; however, due to the limited number of cases included, more studies may be required to confirm the results. J. Clin. Lab. Anal. 23:319,323, 2009. © 2009 Wiley-Liss, Inc. [source]

    Nanoscaled Polyaniline Fibers Prepared by Ferric Chloride as an Oxidant

    MACROMOLECULAR RAPID COMMUNICATIONS, Issue 5 2006
    Lijuan Zhang
    Abstract Summary: Nanoscaled polyaniline (PANI) fibers with 17,30 nm in diameter were successfully prepared by oxidation polymerization using ferric hydrochloride (FeCl3,·,6H2O) as an oxidant in the presence of p -toluenesulfonic acid (p -TSA), , -naphthalenesulfonic acid (, -NSA), and camphorsulfonic acid (CSA) as the dopants. The resulting nanofibers show smaller diameter, higher crystallinity and conductivity (10,1 S,·,cm,1) compared with the nanofibers oxidized by ammonium persulfate (APS), which may be due to the lower oxidation/reduction potential of FeCl3. SEM images of the PANI nanofibers prepared by oxidation polymerization using ferric hydrochloride as an oxidant. [source]

    Copper-Catalyzed Aerobic Oxidative Dehydrogenative Coupling of Anilines Leading to Aromatic Azo Compounds using Dioxygen as an Oxidant,

    ANGEWANDTE CHEMIE, Issue 35 2010
    Chun Zhang
    Luft ist nicht nur zum Atmen da ,: Der Syntheseansatz im Titel liefert symmetrische und unsymmetrische aromatische Azoverbindungen unter milden Bedingungen und hat H2O als einziges Beiprodukt, ist somit nicht nur leicht ausführbar, sondern auch umweltverträglich. [source]

    A Palladium-Catalyzed Oxidative Cycloaromatization of Biaryls with Alkynes Using Molecular Oxygen as the Oxidant,

    ANGEWANDTE CHEMIE, Issue 42 2009
    Zhuangzhi Shi
    Eine doppelte C-H-Aktivierung ermöglichte die Herstellung von polycyclischen Arenen aus Arylindolen und Arylbenzofuranen in Abwesenheit einer dirigierenden Gruppe unter Verwendung von O2 als Oxidationsmittel (siehe Schema). So lassen sich leicht polycyclische Arene von präparativem und medizinischem Interesse herstellen; darüber hinaus zeigen einige der polycyclischen Heteroarene eine intensive Fluoreszenz. [source]

    Manganese-Catalyzed Oxidative Cross-Coupling of Grignard Reagents with Oxygen as an Oxidant,

    ANGEWANDTE CHEMIE, Issue 36 2009
    Gérard Cahiez Dr.
    Die oxidative Heterokupplung zwischen zwei Grignard-Reagentien RMgX und R,MgX gelingt unter Mangan-Katalyse mit O2 als Oxidationsmittel. Die Reaktion, deren Entwurf auf einer mechanistischen Analyse der entsprechende Homokupplung beruhte, kann durch geschickte Wahl der R- und R,-Gruppen von der Homo- hin zur Heterokupplung gelenkt werden (Beispiele im Schema). [source]

    ChemInform Abstract: Iodine as an Oxidant in the Topotactic Deintercalation of Interstitial Iron in Fe1+xTe.

    CHEMINFORM, Issue 43 2010
    Efrain E. Rodriguez
    Abstract The interstitial iron of Fe1+xTe is deintercalated from both single crystal and powder samples by a low temperature reaction with iodine (sealed quartz ampule, 300 °C, 18 h). [source]

    ChemInform Abstract: Copper(II)-Catalyzed ortho-Acyloxylation of the 2-Arylpyridines sp2 C,H Bonds with Anhydrides, Using O2 as Terminal Oxidant.

    CHEMINFORM, Issue 31 2010
    Wenhui Wang
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Copper-Catalyzed Direct Alkynylation of Electron-Deficient Polyfluoroarenes with Terminal Alkynes Using O2 as an Oxidant.

    CHEMINFORM, Issue 29 2010
    Ye Wei
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Catalytic Alkylation of Benzylic C,H Bonds with 1,3-Dicarbonyl Compounds Utilizing Oxygen as Terminal Oxidant.

    CHEMINFORM, Issue 23 2010
    Camille A. Correia
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Palladium(II) Acetate Catalyzed Tandem Cycloisomerization and Oxidation of Arylvinylcyclopropenes Using p-Benzoquinone as Oxidant and Pro-Nucleophile.

    CHEMINFORM, Issue 13 2010
    Zhi-Bin Zhu
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Regioselective Copper-Catalyzed Chlorination and Bromination of Arenes with O2 as the Oxidant.

    CHEMINFORM, Issue 11 2010
    Lujuan Yang
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: A Palladium-Catalyzed Oxidative Cycloaromatization of Biaryls with Alkynes Using Molecular Oxygen as the Oxidant.

    CHEMINFORM, Issue 6 2010
    Zhuangzhi Shi
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Influence of Bases and Ligands on the Outcome of the Cu(I)-Catalyzed Oxidative Homocoupling of Terminal Alkynes to 1,4-Disubstituted 1,3-Diynes Using Oxygen as an Oxidant.

    CHEMINFORM, Issue 51 2009
    Subbarayappa Adimurthy
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Organoiodine-Catalyzed Oxidative Spirocyclization of Phenols Using Peracetic Acid as a Green and Economic Terminal Oxidant.

    CHEMINFORM, Issue 51 2009
    Yutaka Minamitsuji
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Oxidative C,C Bond Formation (Scholl Reaction) with DDQ as an Efficient and Easily Recyclable Oxidant.

    CHEMINFORM, Issue 48 2009
    Linyi Zhai
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Nickel-Catalyzed Oxidative Coupling Reactions of Two Different Terminal Alkynes Using O2 as the Oxidant at Room Temperature: Facile Syntheses of Unsymmetric 1,3-Diynes.

    CHEMINFORM, Issue 25 2009
    Weiyan Yin
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: N-Chlorosuccinimide is a Convenient Oxidant for the Synthesis of 2,4-Disubstituted 1,2,4-Thiadiazolidine-3,5-diones.

    CHEMINFORM, Issue 15 2009
    Shama Nasim
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Anthrone-Derived NHPI Analogues as Catalysts in Reactions Using Oxygen as an Oxidant.

    CHEMINFORM, Issue 13 2009
    Juan Shen
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Iron Catalyst for Oxidation in Water: Surfactant-Type Iron Complex-Catalyzed Mild and Efficient Oxidation of Aryl Alkanes Using Aqueous TBHP as Oxidant in Water.

    CHEMINFORM, Issue 10 2009
    Takashi Nagano
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Iron-Catalyzed Hydroxylation of ,-Ketoesters with Hydrogen Peroxide as Oxidant.

    CHEMINFORM, Issue 3 2009
    Dongmei Li
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Oxone as a Mild, Inexpensive, and Environmentally Benign Oxidant for the ,-Thiocyanation of Ketones.

    CHEMINFORM, Issue 48 2008
    M. Anil Kumar
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Direct Synthesis of Bicyclic Guanidines Through Unprecedented Palladium(II) Catalyzed Diamination with Copper Chloride as Oxidant.

    CHEMINFORM, Issue 38 2008
    Claas H. Hoevelmann
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]

    ChemInform Abstract: Efficient Fe-Catalyzed Homo-Coupling of Aryl Grignard Reagents Using O2 as the Oxidant.

    CHEMINFORM, Issue 19 2008
    Wei Liu
    Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source]