2,4-Diaminophenyl tetrahydrofurfuryl ethers, processes for their preparation and tinting compositions, which contain them for keratinic fibres

US4857070A · kind A · utility

Inventors

• Winfried Seidel · Obertshausen, DE
• Horst Tappe · Dietzenbach, DE

Key dates

• Filing date: Feb 8, 1988
• Grant date: Aug 15, 1989
• Expiry date: Feb 8, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D307/12
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

The invention relates to new 2,4-diaminophenyl tetrahydrofurfuryl ethers of the general formula VIII and to their salts with inorganic or organic acids ##STR1## in which R.sub.1, R.sub.2, R.sub.3 and R.sub.4, independently of one another, each represent a hydrogen atom, a (C.sub.1 -C.sub.4)alkyl group, hydroxy(C.sub.2 -C.sub.4)alkyl group, dihydroxy(C.sub.3 -C.sub.4)alkyl group, halogeno(C.sub.2 -C.sub.4)alkyl group, amino(C.sub.2 -C.sub.4)alkyl group or an amino(C.sub.2 -C.sub.4)alkyl group which is substituted once or twice by methyl, ethyl or hydroxyethyl radicals on the nitrogen, the carbon chain having a straight or branched arrangement, and it being a proviso that at least one of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents a hydrogen atom, to processes for their preparation, and to aqueous tinting compositions for keratin fibres such as fur and human hair, containing at least one coupler and at least one developing component together with customary additives and auxiliaries, the coupler corresponding to the general formula VIII or to the acid salts of these compounds.