2-hydroxy-5-amino-biphenyl-derivatives and oxidative hair colouring agents containing said compounds
申请人:——
公开号:US20020166180A1
公开(公告)日:2002-11-14
The invention relates to an oxidative coloring agent for keratin fibers, in particular hair based on a developing agent-coupling agent combination, which contains as a developing agent at least one 2-hydroxy-5-amino-biphenyl derivative of general formula (I) in addition to novel 2-hydroxy-5-amino-biphenyl derivatives.
p-aminophenol derivative compounds and dye compositions containing same
申请人:——
公开号:US20010054207A1
公开(公告)日:2001-12-27
The p-aminophenol derivative compounds of formula (1), or their physiologically compatible water-soluble salts:
1
are useful as developer compounds in oxidation dye compositions for keratin fibers. Oxidation dye compositions for keratin fibers, including hair, and methods of dyeing hair using the p-aminophenol derivative compounds are also described.
(P-amino-hydroxyphenyl)-acrylamide derivatives and dyes containing said compounds
申请人:——
公开号:US20030192132A1
公开(公告)日:2003-10-16
The object of the invention are (p-aminohydroxyphenyl)acrylamide derivatives of general formula (I) or the physiologically tolerated, water-soluble salts thereof
1
and oxidative coloring agents for keratin fibers, containing these compounds.
2-hydroxy-5-amino-biphenyl-derivatives and oxidative hair coloring agents containing said compounds
申请人:Wella Aktiengesellschaft
公开号:US06749644B2
公开(公告)日:2004-06-15
The object of the present invention are colorants for oxidative dyeing of keratin fibers, particularly hair, based on a developer-coupler combination containing as the developer at least one 2-hydroxy-5-amino-biphenyl derivative of general formula (I), and novel 2-hydroxy-5-aminobiphenyl derivatives.
The electrochemical synthesis of 5-aminocoumaran derivatives from easily oxidizable aminophenols and readily available olefins is described. The reaction efficiently produces 5-aminocoumarans in high yield under mild and environmentally friendly conditions without the necessity of catalysts, additives, oxidizing agents, or sacrificial reagents. Hydrogen as the sole byproduct of the reaction makes the