fused 4-5-diamino-n,n-dihydro-pyrazol-3-one derivatives for use in composition for dyeing keratin fibres

摘要

Composition for dyeing keratinic fibers comprises a 4,5-diamino-2,3-dihydro-1H-pyrazol-3-one developer (I). Composition for dyeing keratinic fibers comprises a 4,5-diamino-2,3-dihydro-1H-pyrazol-3-one developer of formula (I): [Image] R 1-R 41-6C alkyl optionally substituted with OR 5, NR 6R 7, COOH, SO 3H, CONR 6R 7, SO 2NR 6R 7, heteroaryl or aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH 2 or mono- or di(1-2C alkyl)amino; aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH 2 or mono- or di(1-2C alkyl)amino; or 5- or 6-membered heteroaryl optionally substituted with 1-4C alkyl or 1-2C alkoxy; R 3 and R 4 can also be H; R 1+R 2 and R 3+R 4 can form a 5- to 7-membered heterocycle optionally substituted with halo, NH 2, mono- or di(1-2C alkyl)amino, OH, COOH, carboxamido, 1-2C alkoxy or 1-4C alkyl optionally substituted withOH, NH 2, (di)alkylamino, alkoxy, COOH or sulfonyl; R 4+R 4 can form a 5- to 7-membered heterocycle in which C atoms can be replaced by O or optionally substituted N; R 5-R 7H; 1-4C alkyl optionally substituted with OH, 1-2C alkoxy, CONR 6R 7, SO 2R 8 or aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH 2 or mono- or di(1-2C alkyl)amino; or aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH 2 or mono- or di(1-2C alkyl)amino; R 6 and R 7 can also be CONR 6R 7 or SO 2R 8; R 8, R 9H or 1-4C alkyl optionally substituted with OG or 1-2C alkoxy. Independent claims are included for: (1) dyeing keratinic fibers by applying a composition as above in the presence of an oxidizing agent; (2) kit comprising a composition as above in one compartment and an oxidizing agent in another compartment; (3) 5-amino-2,3-dihydro-1H-pyrazol-3-one derivatives of formula (I'); (4) compounds (I) with the proviso that R 1 and R 2 are not both methyl when R 3 and R 4 are hydrogen; (5) two processes for preparing compounds of formula (I). [Image] R' 1-R' 4R 1-R 4; R' 1 3NO 2, NO, or N=N-Ar; Ar : aryl optionally substituted with 1-4C alkyl, NH 2, mono- or di(1-4C alkyl)amino, 1-2C alkoxy, SO 3H, COOH or halo; provided that R' 1 and R' 2 are not both Me when R' 3 and R' 4 are H, and R' 1 3 is not N : N-Ar when R' 3 and R' 4 are H,.