PROCESS FOR THE SYNTHESIS OF 4-SUBSTITUTED N-[(ALK-2- EN-1-YL)OXY]- AND N-ARALKYLOXY- 2,2,6,6-TETRAALKYLPIPERIDINES

PROCESS FOR THE SYNTHESIS OF 4-SUBSTITUTED N-[(ALK-2- EN-1-YL)OXY]- AND N-ARALKYLOXY- 2,2,6,6-TETRAALKYLPIPERIDINES

An environmentally friendly process for the preparation of the 4- functionalized N-OR derivatives of 2,2,6,6-tetraalkylpiperidines involves the hydrogen peroxide of the corresponding N-H compound to form the corresponding N-oxyl derivative, reacting two equivalents of the N-oxyl compound with one eq...

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Bibliographische Detailangaben
Hauptverfasser: BABIARZ, JOSEPH EDMUND, PASTOR, STEPHEN DANIEL, CUNKLE, GLEN THOMAS
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:An environmentally friendly process for the preparation of the 4- functionalized N-OR derivatives of 2,2,6,6-tetraalkylpiperidines involves the hydrogen peroxide of the corresponding N-H compound to form the corresponding N-oxyl derivative, reacting two equivalents of the N-oxyl compound with one equivalent of a compound having an allylic hydrogen, a benzylic hydrogen or an activated methine hydrogen to form one equivalent of the corresponding N-OH compound and one equivalent of the corresponding N-OR compound, and recycling the N-OH compound back to the corresponding N-oxyl compound using hydrogen peroxide or air.