Hair colorants based on perimidine derivatives

US5922086A · kind A · utility

Assignee

• Clariant Corporation · DE

Inventors

• Wolfgang Bauer · Krefeld, DE
• Mustafa Akram
• Herbert Deutz · Zwingenberg, DE

Key dates

• Filing date: Mar 27, 1998
• Grant date: Jul 13, 1999
• Expiry date: Mar 27, 2018

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D239/70
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A method of preparing an oxidation dyestuff comprising the step of: PA1 mixing a coupler substance of formula I ##STR1## wherein R.sup.1 is hydrogen, (C.sub.1 -C.sub.6)-alkyl, hydroxy-(C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.4)-alkoxy-(C.sub.1 -C.sub.6)-alkyl, carboxy-(C.sub.1 -C.sub.6)-alkyl, 2,3-dihydroxypropyl, 2-hydroxy-3-((C.sub.1 -C.sub.4)-alkoxy)-propyl, cyano-(C.sub.1 -C.sub.6)-alkyl, carbamoyl-(C.sub.1 -C.sub.6)-alkyl, ((C.sub.1 -C.sub.4)-alkoxy) carbonyl-(C.sub.1 -C.sub.4)-alkyl, benzyl, phenyl or substituted phenyl; PA1 R.sup.2 is hydrogen, (C.sub.1 -C.sub.6)-alkyl, hydroxy-(C.sub.1 -C.sub.6)-alkyl, (C.sub.1 -C.sub.4)-alkoxy-(C.sub.1 -C.sub.6)-alkyl, oxo-(C.sub.1 -C.sub.6)-alkyl, carboxy-(C.sub.1 -C.sub.6)-alkyl, ((C.sub.1 -C.sub.4)-alkoxy) carbonyl-(C.sub.1 -C.sub.6)-alkyl, carbamoyl-(C.sub.1 -C.sub.6)-alkyl, carboxyl, ((C.sub.1 -C.sub.4)-alkoxy) carbonyl, carbamoyl, phenyl, substituted phenyl or pyridyl; PA1 R.sup.3 is (C.sub.1 -C.sub.6)-alkyl, chlorine or bromine and PA1 n is 0, 1 or 2, PA1 or of salts thereof; with a developer substance. A Hair coloring composition comprising one or more coupler substances and one or more developer substances, characterized in that …