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): - R1-R4 = 1-6C alkyl optionally substituted with OR5, NR6R7, COOH, SO3H, CONR6R7, SO2NR6R7, heteroaryl or aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH2 or mono- or di(1-2C alkyl)amino; aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH2 or mono- or di(1-2C alkyl)amino; or 5- or 6-membered heteroaryl optionally substituted with 1-4C alkyl or 1-2C alkoxy; R3 and R4 can also be H; R1+R2 and R3+R4 can form a 5- to 7-membered heterocycle optionally substituted with halo, NH2, mono- or di(1-2C alkyl)amino, OH, COOH, carboxamido, 1-2C alkoxy or 1-4C alkyl optionally substituted withOH, NH2, (di)alkylamino, alkoxy, COOH or sulfonyl; R4+R4 can form a 5- to 7-membered heterocycle in which C atoms can be replaced by O or optionally substituted N; - R5-R7 = H; 1-4C alkyl optionally substituted with OH, 1-2C alkoxy, CONR6R7, SO2R8 or aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH2 or mono- or di(1-2C alkyl)amino; or aryl optionally substituted with 1-4C alkyl, OH, 1-2C alkoxy, NH2 or mono- or di(1-2C alkyl)amino; R6 and R7 can also be CONR6R7 or SO2R8; - R8, R9 = H 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 R1 and R2 are not both methyl when R3 and R4 are hydrogen; - (5) two processes for preparing compounds of formula (I). - R'1-R'4 = R1-R4; - R'13 = NO2, NO, or N=N-Ar; - Ar = aryl optionally substituted with 1-4C alkyl, NH2, mono- or di(1-4C alkyl)amino, 1-2C alkoxy, SO3H, COOH or halo; - provided that R'1 and R'2 are not both Me when R'3 and R'4 are H, and R'13 is not N = N-Ar when R'3 and R'4 are H,.