abstract |
The present invention describes the use of a compound of formula 1 as an ultraviolet filter. The compound of formula 1 is particularly suitable as an ultraviolet filter in cosmetic preparations.n n n Formula 1n n n n n n n n In Chemical Formula 1,n n n R 1 and R 2 are each independently of the other hydrogen; Unsubstituted, halo-, amino-, mono- or di-C 1 -C 5 alkylamino-, cyano- or C 1 -C 5 alkoxy-substituted C 1 -C 22 alkyl, C 5 -C 10 cyclo Alkyl, carboxy-C 1 -C 22 alkyl, carboxy-C 6 -C 10 aryl, C 6 -C 10 aryl, C 6 -C 10 aryl-C 1 -C 5 alkyl; Carbamoyl; Or sulfamoles,n n n R 1 and R 2 together with the nitrogen atom to which they are attached form a 5-7 membered heterocyclic radical,n n n R 3 is hydrogen or C 1 -C 22 alkyl,n n n R 4 is hydrogen, hydroxy, C 1 -C 22 alkyl or C 1 -C 22 alkoxy. |