Process for preparing 2,2,6,6-tetramethylpiperidine-N-oxyl and its 4-substituted derivatives

Process for preparing 2,2,6,6-tetramethylpiperidine-N-oxyl and its 4-substituted derivatives

It is described a method for preparing 2,2,6,6-tetramethylpiperidine-N-oxyl and its 4-substituted derivatives by catalytic oxidation of the secondary amine hydrogen peroxide at a temperature from 20 to 100 °C. As oxidation catalyst is used carbon dioxide and sodium or potassium salt of phosphoric to...

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Bibliographische Detailangaben
Hauptverfasser: KAVALA MIROSLAV, PETERKOVA JULIA, KOMORA LADISLAV, HALMO FRANTISEK, MATISOVA MARTA
Format: Patent
Sprache:eng ; slo
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Zusammenfassung:It is described a method for preparing 2,2,6,6-tetramethylpiperidine-N-oxyl and its 4-substituted derivatives by catalytic oxidation of the secondary amine hydrogen peroxide at a temperature from 20 to 100 °C. As oxidation catalyst is used carbon dioxide and sodium or potassium salt of phosphoric to polyphosphoric acid as a stabilizer of hydrogen peroxide. It is described a method for preparing 2,2,6,6-tetramethylpiperidine-N-oxyl and its 4-substituted derivatives by catalytic oxidation of the secondary amine hydrogen peroxide at a temperature from 20 to 100 řC. As oxidation catalyst is used carbon dioxide and sodium or potassium salt of phosphoric to polyphosphoric acid as a stabilizer of hydrogen peroxide.