160219-79-4Relevant articles and documents
Aromatic allylaminonitro compounds, hair dye compositions containing aromatic allylaminonitio compounds, and synthetic and natural fiber dyeing process
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, (2008/06/13)
Aromatic allylaminonitro compounds corresponding to formula (I): STR1 in which R1 is hydrogen or an alkyl group containing 1 to 4 carbon atoms, R2 is hydrogen, an alkyl group containing 1 to 4 carbon atoms or an allyl group CH2 C(R5)=CH2, where R5 is hydrogen or an alkyl group containing 1 to 4 carbon atoms, R3 is carboxyl, hydroxy, nitro, halogen or a group NR6 R7, where R6 and R7 independently of one another represent hydrogen, an alkyl group containing 1 to 4 carbon atoms, a hydroxyalkyl or dihydroxyalkyl group containing 2 to 4 carbon atoms or an allyl group CH2 C(R8)=CH2, where R8 is hydrogen or an alkyl group containing 1 to 4 carbon atoms, and R4 is hydrogen or nitro, with the proviso that R3 and R4 are not both nitro. The compounds are useful for dyeing fibers, particularly human hair.