Improved method for the preparation of N-oxyl hindered amine inhibitors

Improved method for the preparation of N-oxyl hindered amine inhibitors

The present disclosure provides a composition and method for the preparation of N-oxyl hindered amine esters by contacting a compound of Formula I: wherein R1 and R2 are independently an alkyl, with a compound of Formula II wherein R3 and R4 are independently an alkyl, and n is an integer from 3 to...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NGUYEN, LAN T. P. HOANG, SATHIOSATHAM, MUHUNTHAN, JULIETTE, JAMIE J, WILCZYNSKI, ROBERT
Format: Patent
Sprache:chi ; eng
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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Beschreibung
Zusammenfassung:The present disclosure provides a composition and method for the preparation of N-oxyl hindered amine esters by contacting a compound of Formula I: wherein R1 and R2 are independently an alkyl, with a compound of Formula II wherein R3 and R4 are independently an alkyl, and n is an integer from 3 to 10, in the presence of a catalyst and a solvent, wherein the catalyst comprises at least one of tin, lithium, zirconium, and hafnium.