Search results for "Baeyer–Villiger oxidation"

showing 4 items of 4 documents

Baeyer−Villiger Oxidation with Potassium Peroxomonosulfate Supported on Acidic Silica Gel

2005

[reaction: see text] Potassium peroxomonosulfate deposited onto silica SiO2 x KHSO5 efficiently reacts with ketones in dichloromethane at room temperature to give the corresponding esters or lactones in quantitative yields. This method avoids hydrolysis of the reaction products. The Baeyer-Villiger reaction is catalyzed by potassium hydrogensulfate present in the supported reagent.

ChemistrySilica gelPotassiumOrganic Chemistrychemistry.chemical_elementGeneral MedicinePotassium peroxymonosulfateCatalysisBaeyer–Villiger oxidationchemistry.chemical_compoundHydrolysisReagentOrganic chemistryDichloromethaneThe Journal of Organic Chemistry
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Baeyer—Villiger Oxidation in Supercritical CO2 with Potassium Peroxomonosulfate Supported on Acidic Silica Gel.

2006

Supercritical carbon dioxide (scCO2) is an efficient reaction medium to perform the Baeyer-Villiger oxidation with hydrated silica-supported potassium peroxomonosulfate (h-SiO2.KHSO5) under flow-through conditions. Hydration modulates the reactivity of the active surface by softening the acidity of the KHSO4 present in the supported reagent. The reaction in scCO2 is much more efficient than in n-hexane under similar conditions, which is attributed to better transport and solvating properties of the supercritical medium with regard to n-hexane.

Supercritical water oxidationSupercritical carbon dioxideChemistrySilica gelOrganic ChemistryInorganic chemistryGeneral MedicinePotassium peroxymonosulfateSupercritical fluidBaeyer–Villiger oxidationchemistry.chemical_compoundReagentCarbon dioxideReactivity (chemistry)ChemInform
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Baeyer–Villiger oxidation of ketones with a silica-supported peracid in supercritical carbon dioxide under flow conditions

2009

[2-Percarboxyethyl]-functionalized silica reacts with ketones in supercritical carbon dioxide at 250 bar and 40 °C under flow conditions to yield the corresponding esters and lactones. The solid reagent can be easily recycled through treatment with 70% hydrogen peroxide in the presence of an acid at 0 °C. This procedure not only simplifies the isolation of the reaction products, but has the advantage of using only water and carbon dioxide as solvents under mild conditions.

Supercritical water oxidationSupercritical carbon dioxideInorganic chemistryPollutionSupercritical fluidBaeyer–Villiger oxidationchemistry.chemical_compoundchemistryReagentCarbon dioxideEnvironmental ChemistryOrganic chemistryHydrogen peroxideElectrochemical reduction of carbon dioxideGreen Chemistry
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ChemInform Abstract: Baeyer-Villiger Oxidation of Ketones with a Silica-Supported Peracid in Supercritical Carbon Dioxide under Flow Conditions.

2009

[2-Percarboxyethyl]-functionalized silica reacts with ketones in supercritical carbon dioxide at 250 bar and 40 °C under flow conditions to yield the corresponding esters and lactones. The solid reagent can be easily recycled through treatment with 70% hydrogen peroxide in the presence of an acid at 0 °C. This procedure not only simplifies the isolation of the reaction products, but has the advantage of using only water and carbon dioxide as solvents under mild conditions.

chemistry.chemical_compoundSupercritical carbon dioxidechemistryYield (chemistry)ReagentCarbon dioxideOrganic chemistryDehydrogenationGeneral MedicineHydrogen peroxideBaeyer–Villiger oxidationBar (unit)ChemInform
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