SULFUR-CONTAINING NITROAMINOBENZENE DYES, PROCESS AND HAIR DYE COMPOSITIONS

摘要

Novel sulfur containing nitroamino benzene dyes of formula: <IMG> (I) and salts thereof wherein (a) R1 and R2 are the same or different and are selected from the group consisting of alkyl, hydroxyalkyl, polyhydroxyalky, aminoalkyl, monoalkylaminoalkyl and dialkylaminoalkyl, wherein (b) n is 0, 1 or 2, and wherein <IMG> (c) the group occupies a position that is meta or para to the group - NHR1 ; a process for synthesizing these compounds; and their use as direct dyeing hair dyes are being disclosed.