The present invention relates to a novel anthrapyridone compound represented by the following formula (1) or a salt thereof:
[wherein, R
1
represents a hydrogen atom, an alkyl group or the like, R
2
represents a hydrogen atom or a methoxy group and R
3
represents an unsubstituted or substituted C5-C12 alkyl group, an unsubstituted or substituted aryl group, or an unsubstituted or substituted heteroaryl group, respectively; and with regard to the substitution positions of —SO
2
R
3
and —SO
3
H whose substitution position are not specified and the both of which the benzene ring has thereon, one of their substitution positions is the para-position and the other thereof is the ortho-position to the substitution position of the nitrogen atom by which said benzene ring is substituted], and the compound of the present invention or a salt thereof has a hue which possesses high vividness suitable for inkjet recording, and provides a magenta coloring matter having higher fastnesses on recorded matter and excellent storage stability.
本发明涉及一种新型
蒽吡啶酮化合物,其
化学式如下(1),或其盐:[其中,R1代表氢原子、烷基或类似物,R2代表氢原子或甲氧基,R3分别代表未取代或取代的C5-C12烷基、未取代或取代的芳基或未取代或取代的杂芳基;至于没有指定其取代位置的—SO2R3和—SO3H的取代位置,其苯环上有的,它们中的一个取代位置是对位,另一个取代位置是氮原子取代该苯环的取代位置的邻位],本发明的化合物或其盐具有高鲜艳度的色调,适用于喷墨记录,并提供具有更高牢度和优异储存稳定性的品红色素。