Oxidation hair dye composition containinng diaminopyrazol derivatives and new diaminopyrazol derivatives

US5061289A · kind A · utility

Assignee

• Wella GmbH · DE

Inventors

• Thomas Clausen · Alsbach, DE
• Ute Kern · Weiterstadt, DE
• Hans Neunhoeffer · Mühltal, DE

Key dates

• Filing date: Aug 2, 1990
• Grant date: Oct 29, 1991
• Expiry date: Aug 2, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D231/38
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Composition for the oxidative dyeing of hair based on a combination of developer substances and coupler substances contains, as developer substance, a diaminopyrazol of the general formula (I), ##STR1## wherein R.sup.1, R.sup.2 and R.sup.4 are identical or different and designate hydrogen, alkyl with 1 to 4 carbon atoms, hydroxyalkyl with 2 to 4 carbon atoms, benzyl or phenyl, and R.sup.3 is hydrogen, alkyl with 1 to 4 carbon atoms, hydroxyalkyl with 2 to 4 carbon atoms, with the proviso that the amino groups are in 3,4 or 4,5 position, or its physiologically tolerated, water-soluble salt, new diaminopyrazol derivatives of the above general formula I are also described herein in which R.sup.1 is methyl or benzyl and the R.sup.2 and R.sup.4 are either benzyl, phenyl, hydrogen, alkyl with 1 to 4 carbon atoms or hydroxyalkyl with 2 to 4 carbon atoms and R.sup.3 is either hydrogen, alkyl with 1 to 4 carbon atoms or hydroxylakyl with 2 to 4 carbon atoms. The compounds of formula I are developer substances which are very favorably tolerated physiologically and enable brilliant hair coloring of great depth of color in the red range.