| abstract |
Thiol dyes of the formula (1) are described (see formula 1) wherein L1 is hydrogen; C1-C12alkyl; or phenyl-C1-C4alkyl; X is C1-C12alkylene, C2-C12alkenylene, C5-C10cycloalkylene, C5-C10arylene or C5-C10arylene-C1-C10alkylene, which may be interrupted by -O-, -NH -, - S-, -CO-, or -SO2 -; Y is the residue of an organic dye Z is a group of the formula (see formula 1b); or -C = N; where A is O; S; or N-L2; B is L3; -OL3; -NL3L4; or -SL3; and L2, L3 and L4, independently of each other are hydrogen; C1-C12alkyl; C6-C12aryl; or C6-C12aryl-C1-C12alkyl. The compounds are useful for dyeing organic materials, such as keratin fibers, preferably human hair. |