Thiol derivative dyes

US7803197B2 · kind B2 · utility

Assignee

• Ciba Corp. · US

Inventors

• Victor Paul Eliu · Lörrach, DE
• Beate Fröhling · Weil am Rhein, DE
• Dominique Kauffmann · Illzach, FR

Key dates

• Filing date: Aug 8, 2007
• Grant date: Sep 28, 2010
• Expiry date: Aug 8, 2027

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B56/18
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Disclosed are thiol dyes of formula (1) wherein L1 is hydrogen; C1-C12alkyl; or phenyl-C1-C4alkyl; X is C1-C12alkylene, C2-C12alkenylene, C5-C10cycloalkylene, C5-C10arylene, or C5-C10arylene-C1-C10alkylene, which may by interrupted by —O—, —NH—, —S—, —CO—, o-SO2—; Y is the residue of an organic dye Z is a group of formula (1b) or —C≡N; wherein A is O; S; or N-L2; B is L3; —OL3; —NL3L4; or —SL3; and L2, L3 and L4, independently from other are hydrogen; C1-C12alkyl; C5-C12aryl-C1-C12alkyl. The compounds are useful for the dyeing of organic materials, such as keratin fibers, preferably human hair.