| abstract |
The present invention relates to the use of a compound of formula (1) or (2) to protect human and animal hair and skin from UV radiation:n n n (One)n n n (2)n n n Wheren n n R 1 and R 2 are each independently hydrogen; C 1 -C 22 alkyl; Cyclo-C 3 -C 8 alkyl; Or unsubstituted or C 1 -C 5 alkyl- or C 1 -C 5 alkoxy-substituted C 6 -C 20 aryl; Or R 1 and R 2 combine with the nitrogen atoms connecting them to form a-(CH 2 ) m -ring which may or may not contain -O- or -NH in the middle;n n n R 3 is a cyano group; -COOR 5 ; -CONHR 5 ; -COR 5 ; Or -SO 2 R 5 ;n n n R 4 is a cyano group; -COOR 6 ; -CONHR 6 ; -COR 6 ; Or -SO 2 R 6 ;n n n R 5 and R 6 are each independently of the other C 1 -C 22 alkyl; Or unsubstituted or C 1 -C 6 alkyl-substituted C 6 -C 20 aryl; orn n n R 3 and R 4 are combined or R 5 and R 6 are combined to form a 5- to 7-membered monocyclic carbocyclic or heterocyclic ring;n n n Z 1 and Z 2 independently of one another may or may not include -O-, -S- or -NR 7 -and / or are unsubstituted or substituted by C 1 -C 5 alkyl-( CH 2 ) l -group;n n n R 7 is C 1 -C 5 alkyl;n n n l is 1 to 4;n n n m is 1 to 7;n n n n is 1 to 4;n n n when n = 2, R 1 , R 5 or R 6 is a divalent alkyl group; Or R 1 and R 2 combine with two nitrogen atoms connecting them to form a-(CH 2 ) m -ring;n n n when n = 3, R 1 , R 5 or R 6 is a trivalent alkyl group;n n n when n = 4, R 1 , R 5 or R 6 is a tetravalent alkyl group; In additionn n n R 1 and R 2 in formula (1) are not hydrogen at the same time.n n n UV radiation protection |