| 摘要 |
PROBLEM TO BE SOLVED: To obtain the novel subject compound having excellent resistance to various treatments by which keratin fibers would be processed, useful as a direct dye capable of attaining strong coloring in a wide range of color tones by bringing the compound to have a specific cationic group. SOLUTION: This cationic aminoanthraquinone is a compound expressed by formula I R1 to R4 are each H, a halogen, a group of Z or the like; R5 is H, a group of Z or the like; Z is an unsaturated cationic group expressed by formula II or III [D is preferably a bond expressing a 1-14C alkyl chain, E, G, J, L and M are each C, O, S or N; (n) is 0-4; (m) is 0-5; R is a Z group or the like; R7 and R11 are each a 1-6C alkyl or the like; (x) and (y) are each 0 or 1; and X- is a univalent or divalent amino or a saturated cationic group expressed by formula IV (R8 to R10 are each a 1-6C alkyl or the like)], e.g. 1-[2-(9,10-dioxo-9,10-dihydroanthracen-1-ylamino)ethyl]-3-methyl-3H-im idazol-1-ium- bromide. The compound of the formula is obtained by, e.g. condensing a compound carrying a tertiary amine group with a haloalkyl-containing anthraquinone.
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