Syntheses of Anthracenones. 1. Sodium Dithionite Reduction of <i>peri</i>-Substituted Anthracenediones
作者:Helge Prinz、Wolfgang Wiegrebe、Klaus Müller
DOI:10.1021/jo9520351
日期:1996.1.1
The reaction of peri-substituted anthracenediones with sodium dithionite in dimethylformamide and water has been investigated. The system selectively reduces the carbonyl group flanked by the peri substituents of the anthracenediones to give the corresponding 4,5-disubstituted 9(10H)-anthracenones and thus provides a route to anthracenones which are otherwise difficult to obtain. Many functional groups
[EN] COMPOSITION COMPRISING AT LEAST ONE ANTHRONE DERIVATIVE AND ONE BASIFYING AGENT, AND METHOD FOR DYEING KERATINOUS FIBRES STARTING FROM THE COMPOSITION<br/>[FR] COMPOSITION COMPRENANT AU MOINS UN DÉRIVÉ D'ANTHRONE ET UN AGENT DE BASIFICATION, ET PROCÉDÉ DESTINÉ À COLORER DES FIBRES KÉRATINIQUES À PARTIR DE CETTE COMPOSITION
申请人:OREAL
公开号:WO2011045404A2
公开(公告)日:2011-04-21
A subject-matter of the invention is a composition for the dyeing of keratinous fibres comprising at least one anthrone derivative and at least one basifying agent, the use of the composition in hair dyeing and the use of the composition in a dyeing method. The dyeing method according to the invention makes it possible to dye keratinous fibres with anthrone derivatives under mild oxidizing conditions, even without using an oxidation base and an aromatic amine, while covering a broad palette of colours. The dyeing under oxidizing conditions observed operates under mild conditions of oxidation and/or of alkaline agent, in particular exposed to the air.
XXII.—Reduction products of the hydroxyanthraquinones. Part XII