An azo pigment represented by the following formula (1) or a tautomer thereof:
wherein R1 represents an aliphatic group having 1 to 8 carbon atoms in total, an aryl group having 6 to 12 carbon atoms in total or a heterocyclic group having 2 to 12 carbon atoms in total; R2 represents a hydrogen atom or an aliphatic group having 1 to 8 carbon atoms in total; R3 represents a hydrogen atom, an aliphatic group having 1 to 4 carbon atoms in total, an aliphatic amino group having 1 to 8 carbon atoms in total, or an amino group; R4 and R5 each independently represent an aliphatic amino group having 1 to 8 carbon atoms in total, or an amino group; R6 represents a cyano group, a carbamoyl group having 1 to 10 carbon atoms in total, an aliphatic oxycarbonyl group having 1 to 8 carbon atoms in total, an aliphatic sulfonyl group having 1 to 8 carbon atoms in total, or a carboxy group; and X2 represents a nitrogen atom or C-CN.
pH-induced azo-keto and azo-enol tautomerism for 6-(3-methoxypropylamino)pyridin-2-one based thiophene azo dyes
作者:Xiao-Lei Zhao、Jiao Geng、Hui-Fen Qian、Wei Huang
DOI:10.1016/j.dyepig.2017.08.020
日期:2017.12
post-modification (PM) is proposed to prepare two new types of 2-amino-3-cyano-4-chloro-5-formylthiophene based heterocyclic azo dyes with mono and double 3-methoxypropan-1-amine substituted pyridine components, where the terminal aldehyde radical of the 2-formylthiophene moiety is extended into imine, acetal or α,β-unsaturated cyanoacetic ester group. The evaluation of pH stability of the mono FGT products indicates
[EN] FUSED HETEROCYCLIC INDANE CARBOXAMIDE CGRP RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DES RÉCEPTEURS DU CGRP INDANECARBOXAMIDES HÉTÉROCYCLIQUES CONDENSÉS
申请人:MERCK SHARP & DOHME
公开号:WO2012087777A1
公开(公告)日:2012-06-28
The present invention is directed to fused heterocyclic indane carboxamide derivatives which are antagonists of CGRP receptors and useful in the treatment or prevention of diseases in which the CGRP is involved, such as migraine. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CGRP is involved.
[EN] ACID DYES, PROCESS FOR THE PRODUCTION THEREOF AND THEIR USE<br/>[FR] COLORANTS ACIDES, PROCÉDÉ POUR LES PRODUIRE, ET LEUR UTILISATION
申请人:DYSTAR COLOURS DISTRIB GMBH
公开号:WO2015062939A1
公开(公告)日:2015-05-07
Dye(s) of formula (I), process for their production and their use.
公式(I)的染料,其生产过程及其用途。
Extremely high pH stability for a class of heterocyclic azo dyes having the common N 2 , N 6 -bis(3-methoxypropyl)pyridine-2,6-diamine coupling component
N6-bis(3-methoxypropyl)pyridine-2,6-diamine azodyes, prepared by coupling 2,6-bis((3-methoxypropyl)amino)-4-methylnicotinonitrile and diazotized substituted anilines with distinguishable electron push-pull abilities, have been described in this paper. The newdyes undergoing double functional group transformation (FGT) show extremely high pH stability compared to corresponding mono FGT dyes, which could be ascribed