申请人:Ciba-Geigy Corporation
公开号:US04174856A1
公开(公告)日:1979-11-20
A chromenoindole compound of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another represent hydrogen, alkyl which has at most 12 carbon atoms and is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy; cycloalkyl, phenyl, benzyl, or phenyl or benzyl which are substituted by halogen, lower alkyl or lower alkoxy, or R.sub.1 and R.sub.2, together with the nitrogen atom which links them, represent a 5-membered or 6-membered heterocyclic radical, Q is hydrogen, lower alkyl, phenyl, benzyl or the groups of the formulae (1a) or (1b) ##STR2## X and X' each represent hydrogen, halogen, lower alkyl or lower alkoxy, Y represents hydrogen, alkyl of 1 to 12 carbon atoms, phenyl or benzyl and the rings A and B independently of one another are unsubstituted or substituted by halogen, nitro, lower alkyl, lower alkoxy, phenoxy, amino or amino substituted by lower alkyl, phenyl or benzyl; these compounds are particularly useful as color formers which give intense red to blue color shades of excellent light fastness when they are brought into contact with an electron acceptor.
化合物为式##STR1##的一种香豆素吲哚化合物,其中R.sub.1和R.sub.2分别独立地表示氢、最多具有12个碳原子且未取代或取代为卤素、羟基、氰基或较低的烷氧基的烷基;环烷基、苯基、苄基、或被卤素、较低的烷基或较低的烷氧基取代的苯基或苄基,或R.sub.1和R.sub.2与连接它们的氮原子一起表示5-成员或6-成员的杂环基,Q为氢、较低的烷基、苯基、苄基或式(1a)或(1b)的基团##STR2##X和X'各自表示氢、卤素、较低的烷基或较低的烷氧基,Y表示1至12个碳原子的烷基、苯基或苄基,环A和环B独立地未取代或取代为卤素、硝基、较低的烷基、较低的烷氧基、苯氧基、氨基或被较低的烷基、苯基或苄基取代的氨基;这些化合物在与电子受体接触时,特别有用作为色形成剂,可以产生优异的光稳定性的强烈红色到蓝色色调。