| 摘要 |
PROBLEM TO BE SOLVED: To provide dyes useful for the dyeing of organic materials, such as keratin fibers, wool, leather, silk, cellulose or polyamides, especially keratin-containing fibers, cotton or nylon, preferably hair, and more preferably human hair.SOLUTION: Disclosed are compounds of formula (1) or formula (2). [A is a residue of a cationic die; X1 and X2 are each independently hydrocarbon chains, optionally interrupted by at least one bivalent group chosen from -N(R1)-, N+(R1)(R2)-, -O-, -S-, -CO-, -SO2-, and/or optionally interrupted by an optionally substituted, saturated or unsaturated, fused or non-fused, aromatic or nonaromatic (hetero)cyclic radical optionally comprising at least one identical or different heteroatom].SELECTED DRAWING: None |
