申请人:Ciba-Geigy Corporation
公开号:US04920220A1
公开(公告)日:1990-04-24
Chromogenic 1-heterocyclic substituted 2,4-benzoxazines of formula ##STR1## wherein X.sub.1 and X.sub.2 are identical or different monocyclic or polycyclic heteroaromatic radicals and X.sub.2 is also an aryl radical, Y is hydrogen, alkyl, cycloalkyl, aryl, aralkyl or a heterocyclic radical, and the benzene ring A is substituted by halogen, cyano, nitro, lower alkyl, lower alkoxy, lower alkylthio, lower alkylcarbonyl, lower alkoxycarbonyl or --NR.sub.1 R.sub.2, in which R.sub.1 and R.sub.2 are each independently of the other hydrogen, alkyl of not more than 12 carbon atoms which is unsubstituted or substituted by halogen, hydroxy, cyano or lower alkoxy, or are cycloalkyl of 5 to 10 carbon atoms, or phenalkyl or phenyl, each unsubstituted or ring-substituted by halogen, cyano, lower alkyl or lower alkoxy, or --NR.sub.1 R.sub.2 is a 5- or 6-membered, preferably saturated, heterocyclic radical. These benzoxazines are particularly suitable for use as color formers in pressure-sensitive or heat-sensitive recording materials and give strong and lightfast orange, pink, red, violet, green, greenish-blue, violet blue, grey or black colorations.
氟代、氰基、硝基、低烷基、低烷氧基、低烷硫基、低烷基羰基、低烷氧羰基或-NR₁R₂取代苯环A,其中R₁和R₂各自独立地为氢、不超过12个碳原子的未取代或取代的烷基,取代基为氟、羟基、氰基或低烷氧基,或为5到10个碳原子的环烷基,或为苯基或苯基烷基,每个未取代或环取代的取代基为氟、氰基、低烷基或低烷氧基,或-NR₁R₂为5-或6-成员、最好饱和的杂环基团。这些苯并噁嗪特别适用于用作压敏或热敏记录材料中的显色剂,并提供强烈和耐光的橙色、粉红色、红色、紫色、绿色、绿蓝色、紫蓝色、灰色或黑色的着色。