Nitroaminophenols and their use in dyeing keratinous fibres.

US4749379A · kind A · utility

Assignee

• L'Oreal · FR

Inventors

• Alex Junino · Livry-Gargan, FR
• Gerard Lang · Saint-Gratien, FR
• Alain Genet · Aulnay-sous-Bois, FR

Key dates

• Filing date: Apr 11, 1986
• Grant date: Jun 7, 1988
• Expiry date: Apr 11, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B51/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

New nitroaminophenols, the process for preparation thereof and their use in dyeing keratinous fibres, and new intermediate nitroaminobenzenes and their use in dyeing keratinous fibres. The invention relates to a nitroaminophenol of formula: ##STR1## in which Z denotes --CH.sub.2 W, W denoting H, C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 hydroxyalkyl, C.sub.2 -C.sub.6 polyhydroxyalkyl, (C.sub.1 -C.sub.3), alkoxy(C.sub.1 -C.sub.6)alkyl or (C.sub.1 -C.sub.3)hydroxyalkoxy(C.sub.1 -C.sub.6)-alkyl and R denotes H, (C.sub.1 -C.sub.6)alkyl, C.sub.1 -C.sub.6 hy-droxyalkyl, C.sub.2 -C.sub.6 polyhydroxyalkyl or (C.sub.1 -C.sub.3)-alkoxy(C.sub.1 -C.sub.6)alkyl, and the process for preparation thereof, and the intermediate compound of formula: ##STR2## in which R' denotes C.sub.1 -C.sub.6 hydroxyalkyl, C.sup.2 -C.sub.6 polyhydroxyalkyl or (C.sub.1 -C.sub.3)alkoxy(C.sub.1 -C.sub.6)alkyl and the process for preparation thereof. The dyes of formulae (I) and (II') can be used in direct dyeing of keratinous fibres, in particular, human hair.