Cyclic ether or carbonate alkylation products of 2,2,5,5-tetrame

Details Cyclic ether or carbonate alkylation products of 2,2,5,5-tetrame Cyclic ether or carbonate alkylation products of 2,2,5,5-tetrame

1982-04-23

1984-05-15

Kight, III, John

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D23300

Patent

active

044489692

ABSTRACT:
Amide or 3-alkylation of 2,2,5,5-tetra-substituted imidazolidin-4-ones, using either monofunctional or polyfunctional cyclic ethers as alkylating agents, under basic conditions, or an ethylene carbonate. The cyclic ether reactants may be aldehydes or ketones having a single carbon atom in the ring. The alcohols obtained from ether addition to the 2,2,5,5-tetrasubstituted imidazolidin-4-ones may be converted to esterified derivatives by treatment with carboxylic acids or esters. Representative esters from mono- or polyalkylated imidazolidinones possess superior light stabilizing activity. Also embraces new compounds that are useful as light stabilizers for synthetic polymers.

REFERENCES:
patent: 3971757 (1976-07-01), Rasberger
patent: 4207229 (1980-06-01), Spivack

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