Chemistry of aminophenols. Part 1: Remarkable additive effect on Sonogashira cross-coupling of 2-carboxamidoaryl triflates and application to novel synthesis of indoles
摘要:
A novel and general synthesis of indoles has been established by utilizing 2-aminophenols as the starting materials. The key step is a modified Pd(0)-Cu(I)-catalyzed cross-coupling of 1-alkynes with 2-carboxamidoaryl triflates in the presence of n-Bu4NI as the additive. The 2-alkynylanilides obtained were subjected to an alkoxide-mediated cyclization to provide a number of indole containing compounds possessing substituents at the C2, C4, C5, and/or C6 position(s) in good overall yields. (C) 2001 Elsevier Science Ltd. All rights reserved.
Keratinous fiber dye composition containing a 2-substituted
申请人:Kao Corporation
公开号:US05334225A1
公开(公告)日:1994-08-02
A keratinous fiber dye composition comprising a developer and a coupler, wherein the coupler is a 2-substituted amino-5-alkylphenol derivative represented by the following formula (1): ##STR1## wherein the all symbols are defined in the disclosure, is disclosed. The keratinous fiber dye composition imparts a color tone of a high chroma and is excellent in coloring power and fastness.
A dye composition for a keratinous fiber comprising a developer and a coupler, wherein the coupler is a 2- substituted amino-5-alkylphenol derivative represented by the following formula (1):
wherein the all symbols are defined in the disclosure, is disclosed. The dye composition imparts a color tone of a high chroma and is excellent in coloring power and fastness.
Composition de teinture d'oxydation des fibres kératiniques et procédé de teinture mettant en oeuvre cette composition
申请人:L'OREAL
公开号:EP1093789A1
公开(公告)日:2001-04-25
L'invention a pour objet une composition pour la teinture d'oxydation des fibres kératiniques, et en particulier des fibres kératiniques humaines telles que les cheveux comprenant, dans un milieu approprié pour la teinture, au moins une base d'oxydation choisie parmi certains dérivés substitués du para-aminophénol et leurs sels d'addition avec un acide, et au moins un coupleur choisi parmi des dérivés 2-substitués d'amino-5-alkylphénols, ainsi que le procédé de teinture mettant en oeuvre cette composition.