4-Alkyl-1,4-diaza-5-oxo-cycloheptanes and their 1-oxyls

Details 4-Alkyl-1,4-diaza-5-oxo-cycloheptanes and their 1-oxyls 4-Alkyl-1,4-diaza-5-oxo-cycloheptanes and their 1-oxyls

1974-06-05

1976-06-29

Jiles, Henry R.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 458R, C07D24306

Patent

active

039667111

ABSTRACT:
2,2,7,7-Tetraalkyl- and 2,7-dispiroalkylene-5-oxo-1,4-diazacycloheptanes substituted in 4-position by mono- or tetravalent radicals are powerful light-stabilizers for organic polymers. They possess higher compatibility than their 4-unsubstituted homologues, from which they may synthesized by reactions known for N-alkylation. Preferred substituents in 4-position are alkyl, alkylene, alkenyl, aralkyl and esteralkyl groups. The 1-nitroxyls derived from the imidazolidines by oxydation with hydrogen peroxide or percarboxylic acids too are good light stabilizers.

REFERENCES:
patent: 3040029 (1962-01-01), Poppelsdorf et al.

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