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Catalytic System Consisting (catalytic + system_consisting)
Selected AbstractsMetal-Free: An Efficient and Selective Catalytic Aerobic Oxidation of Hydrocarbons with Oxime and N -HydroxyphthalimideADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 16 2009Gengxiu Zheng Abstract A non-metal catalytic system consisting of dimethylglyoxime (DMG) and N -hydroxyphthalimide (NHPI) for the selective oxidation of hydrocarbons with dioxygen is described. The synergistic effect of DMG and NHPI ensures its efficient catalytic ability: 82.1% conversion of ethylbenzene with 94.9% selectivity for acetophenone could be obtained at 80,°C under 0.3,MPa of dioxygen in 10,h. Several hydrocarbons were efficiently oxidized to their corresponding oxygenated products under mild conditions. [source] Trace Water-Promoted Oxidation of Benzylic Alcohols with Molecular Oxygen Catalyzed by Vanadyl Sulfate and Sodium Nitrite under Mild ConditionsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 4 2009Zhongtian Du Abstract An inexpensive catalytic system consisting of vanadyl sulfate and sodium nitrite was developed for the oxidation of benzylic alcohols with molecular oxygen under mild conditions. Benzyl alcohols with various substitutions were efficiently converted to their corresponding aldehydes with high conversion and selectivity under 80,°C (e.g., 4-nitrobenzyl alcohol was smoothly oxidized to 4-nitrobenzyl aldehyde with 94% yield under 0.5,MPa of molecular oxygen). Halogen, noble metals, extra base or complicated ligands were avoided. Addition of a trace of water to this system before the reaction was crucial for the high efficiency. [source] TEMPO- tert -Butyl Nitrite: An Efficient Catalytic System for Aerobic Oxidation of AlcoholsADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 1-2 2009Xijun He Abstract A metal-free catalytic system consisting of 2,2,6,6-tetramethylpiperidine N -oxyl (TEMPO) and tert -butyl nitrite has been developed to activate molecular oxygen for the aerobic oxidation of alcohols. A variety of active and non-active alcohols were oxidized to their corresponding carbonyl compounds in high selectivity and yields. [source] ChemInform Abstract: Asymmetric Intermolecular N,H Insertion Reaction of Phenyldiazoacetates with Anilines Catalyzed by Achiral Dirhodium(II) Carboxylates and Cinchona Alkaloids.CHEMINFORM, Issue 41 2010Hiroaki Saito Abstract A novel catalytic system consisting of a rhodium salt and dihydrocinchonine is used for the synthesis of phenylglycine derivatives (III) by asymmetric N-H insertion reaction of phenyldiazoacetate (I) with anilines (II). [source] | ||||||||||