申请人:Ciba-Geigy Corporation
公开号:US04316036A1
公开(公告)日:1982-02-16
A benzopyranothiazole of the formula ##STR1## wherein each of R.sub.1 and R.sub.2 independently represents hydrogen, alkyl of not more than 12 carbon atoms which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or represents cycloalkyl, phenyl, benzyl, or phenyl or benzyl which is substituted by halogen, lower alkyl or lower alkoxy, or R.sub.1 and R.sub.2 together with the nitrogen atom to which they are attached represent a 5- or 6-membered heterocyclic radical or a N-carbazolyl radical, Q represents hydrogen, lower alkyl, benzyl or groups of the formulae (1a) or (1b) ##STR2## each of X, X.sub.1 and X.sub.2 represents hydrogen, halogen, lower alkyl or lower alkoxy, each of Y.sub.1, Y.sub.2, Y'.sub.1 and Y'.sub.2 represents hydrogen, alkyl of not more than 12 carbon atoms which is unsubstituted or substituted by halogen, hydroxyl, cyano or lower alkoxy, or represents cycloalkyl, phenyl, benzyl, or phenyl or benzyl which is substituted by halogen, lower alkyl or lower alkoxy, or each of the pair of substituents Y.sub.1 and Y.sub.2 and Y'.sub.1 and Y'.sub.2, together with the nitrogen atom to said pair is attached, independently represents a 5- or 6-membered heterocyclic radical or a N-carbazolyl radical and the ring A is unsubstituted or substituted by halogen, nitro, lower alkyl, lower alkoxy, phenoxy or an amino group which is unsubstituted or 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-accepting co-reactant.
本发明涉及一种公式为##STR1##的苯并吡喃噻唑,其中R.sub.1和R.sub.2各自独立地表示氢、未被卤素、羟基、氰基或较低烷氧基取代的不超过12个碳原子的烷基,或表示环烷基、苯基、苄基,或被卤素、较低烷基或较低烷氧基取代的苯基或苄基,或R.sub.1和R.sub.2与它们连接的氮原子一起表示5-或6-成员杂环基或N-咔唑基,Q表示氢、较低烷基、苄基或以下式(1a)或(1b)的基团 ##STR2## 其中X、X.sub.1和X.sub.2各自表示氢、卤素、较低烷基或较低烷氧基,Y.sub.1、Y.sub.2、Y'.sub.1和Y'.sub.2各自表示氢、未被卤素、羟基、氰基或较低烷氧基取代的不超过12个碳原子的烷基,或表示环烷基、苯基、苄基,或被卤素、较低烷基或较低烷氧基取代的苯基或苄基,或每对取代基Y.sub.1和Y.sub.2和Y'.sub.1和Y'.sub.2,与所述对应的氮原子一起连接,各自独立地表示5-或6-成员杂环基或N-咔唑基,环A未被卤素、硝基、较低烷基、较低烷氧基、苯氧基或未被较低烷基、苯基或苄基取代的氨基团取代或未取代;这些化合物特别适用于作为颜色形成剂,当它们与接受电子的共反应剂接触时,能产生出色彩鲜艳、具有极佳光牢度的红色至蓝色色调。