Use of acridine-aldehydes and/or -ketones, some of which are novel compounds, in dyeing hair in a wide variety of intense shades, even in the absence of oxidizers

摘要

An agent for dyeing keratin fibers (especially human hair) contains an acridine-aldehyde and/or -ketone, the novel compounds 9-formyl-10-methylacridinium-p-toluene sulfonate and 9-((dimethylaminophenylimino)-methyl)-10-methylacridinium-methylsulfate being claimed per se. An agent for dyeing keratin fibers (especially human hair) contains an acridine-aldehyde and/or -ketone of formula (I), the novel compounds 9-formyl-10-methylacridinium-p-toluene sulfonate and 9-((dimethylaminophenylimino)-methyl)-10-methylacridinium-methylsulfate being claimed per se. R1 = H. 1-4C alkyl or aryl; R2 - R5 = H, halogen, 1-4C alkyl, hydroxyalkyl, alkoxy, hydroxyalkoxy or acyl, OH, NO2, sulfo or amino (optionally 1-4C alkyl-substituted), optionally with 2 such groups forming a condensed aromatic ring ; R6 = H, 1-4C alkyl, hydroxyalkyl or aralkyl, 1-6C carboxy- or sulfo-alkyl, aryl, hetroaryl or negatively-charged oxygen, with R6 and the positive charge on N optionally being omitted; and X = an anion, especially halide, sulfonate (eg benzene-, p-toluene-, methane- or trifluoro-sulfonate), Me- or Et-sulfate, perchlorate, (hydrogen)sulfate, tetrafluoroborate, tetrachlorozincate or alkanoate; with the provisos that X- is omitted when (i) R6 = a negatively-charged O atom or the sulfo group for R2 - R5 or the 1-6C carboxy- or sulfo-alkyl group for R6 is present as a sulfonate or carboxylate; or (ii) R6 and the positive charge on N are not present