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Application filed by Ustav Polymerov SavfiledCriticalUstav Polymerov Sav
Priority to CS22389ApriorityCriticalpatent/CS274982B2/en
Publication of CS8900223A1publicationCriticalpatent/CS8900223A1/en
Publication of CS274982B2publicationCriticalpatent/CS274982B2/en
The solution concerns 1,6-Dioxa-9,9,10,11,11-pentamethyl-10-azaspiro[6,5]dodes-3-ene of formula I. The above mentioned compound is prepared in the following way: 1,2,2,6,6-pentamethyl-4-oxopiperidine of formula II reacts with 2-butene-1,4-diol of formula III at a temperature of reversed current of hydrocarbonic solvent, which results in origination of azeotropic mixture with water, like benzene, toluene or xylenes, in presence of acid catalyser like 4-toluene sulfonic acid.The compound of formula I can be used as light stabiliser for polymers and for preparation of polymeric light stabilisers.<IMAGE>
PROCESS TO PREPARE IN ALL POSSIBLE ISOMER FORMS OR IN THE FORM OF MIXTURES OF COMPOUND ISOMERS APPLICATION OF THESE COMPOUNDS AND COMPOSITIONS BASED ON THE SAME