| abstract |
Novel 2-imino-2,3-dihydro-1H-indole derivatives of formula (I) or (II) below:in which:R1, R2 and R3 denote hydrogen, alkyl, carboxyl, alkoxycarbonyl, monohydroxyalkyl, polyhydroxyalkyl, alkoxyalkyl, monoalkylaminoalkyl or dialkylaminoalkyl;R'3 and R4 denote alkyl, carboxyl, alkoxycarbonyl, monohydroxyalkyl, polyhydroxyalkyl, alkoxyalkyl, monoalkylaminoalkyl or dialkylaminoalkyl;R5 denotes hydrogen, alkyl, monohydroxyalkyl, polyhydroxyalkyl, alkoxyalkyl, monoalkylaminoalkyl or dialkylaminoalkyl;and the addition salts thereof with an acid, as well as their uses for dyeing keratin fibres. |