| abstract |
Disclosed are thiol dyes of 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 by interrupted by -O-, -NH-, -S-, -CO-, o -SO2-; Y is the residue of an organic dye Z is a group of formula (1b) or -CΞN; wherein A is O; S; or N-L2; B is L3; -OL3; -NL3L4; or -SL3; and L2, L3 and L4, indepently from other are are hydrogen; C1-C12alkyl; C5-C12aryl-C1-C12alkyl. The compounds are useful for the dyeing of organic materials, such as keratin fibers, preferably human hair. |