Aerobic Oxidation of Alkene under Mild Conditions
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Researches on the aerobic oxidation of alkene catalyzed by metal complexes under mild conditions are reviewed.Keywords:
Alkene
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Epoxidation of olefins was successfully achieved using molecular oxygen in the presence of an aldehyde and a catalytic amount of CuCl2 at room temperature. Hexanal was found to be a particularly good reducing agent for the CuCl2-catalyzed epoxidation. A good correlation was observed between the reactivity and the calculated ionization potential for some of the aldehydes tested. The present system was applied to epoxidation of a range of olefins in high to excellent yields.
Molecular oxygen
Reactivity
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An environmentally friendly catalytic system of Fe 2 (SO 4 ) 3 /4-OH-TEMPO/NaNO 2 has been developed for aerobic oxidation of alcohols to aldehydes and ketones. The catalytic system allowed efficient and selective oxidation of a wide range of alcohols using oxygen at 1 atmospheric pressure and room temperature. 100% selectivity and excellent conversion rates were observed for benzylic alcohols and cinnamyl alcohol.
Alcohol Oxidation
Cinnamyl alcohol
Molecular oxygen
Environmentally Friendly
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By ligand, TEMPO, and base screening, we developed a mild and green one-pot imine synthesis from alcohols and aminesvia a low-loading palladium-catalyzed tandem aerobic alcohol oxidation–dehydrative condensation reaction that can be readily carried out in open air at room temperature.
Imine
Tandem
Alcohol Oxidation
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Abstract For Abstract see ChemInform Abstract in Full Text.
Surface Modification
Nitric acid
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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.
Alcohol Oxidation
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Abstract For Abstract see ChemInform Abstract in Full Text.
Silanes
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struct
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We herein describe the development of a mild and selective catalytic aerobic oxidation process of olefins. This catalytic aerobic oxidation reaction was designed based on experimental and spectroscopic evidence assessing the reduction of atmospheric oxygen using a ferric porphyrin complex and pinacolborane to form a ferric boroperoxo porphyrin complex as an oxidizing species. The ferric boroperoxo porphyrin complex can be utilized as an in-situ generated intermediate in the catalytic aerobic oxidation of alkenes under ambient conditions to form oxidation products that differ from those obtained using previously reported ferric porphyrin catalysis. Moreover, the mild reaction conditions allow chemoselective oxidation to be achieved. We herein reported the first direct experimental evidence demonstrating that a ferric porphyrin complex can reduce atmospheric oxygen in the presence of HBpin to form a ferric boroperoxo porphyrin complex.
Oxidizing agent
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