申请人:Ciba-Geigy Corporation
公开号:US04055358A1
公开(公告)日:1977-10-25
Nitro-phthalides of the formula ##STR1## in which E is a radical of the formula ##STR2## X and X' each represents alkyl with 1 to 12 carbon atoms, alkoxy with 1 to 12 carbon atoms or acyloxy with 2 to 12 carbon atoms, and X may also be hydrogen. Z represents hydrogen, alkyl having 1 to 12 carbon atoms or phenyl, Y represents hydrogen, alkyl having 1 to 12 carbon atoms, benzyl or cyanoethyl, R.sub.1, R.sub.2, R.sub.1 ' and R.sub.2 ', independently of the other, represents hydrogen, alkyl with 1 to 12 carbon atoms, alkoxyalkyl with 2 to 8 carbon atoms, cycloalkyl with 5 or 6 carbon atoms, benzyl or phenyl and the benzene ring B may be further substituted by halogen, nitro or an amino group optionally substituted by alkyl with 1 to 6 carbon atoms. The nitro-phthalides are particularly useful as color formers which give intense green, blue-green or blue colors when they are brought into contact with an electron-accepting co-reactant.
此处介绍的是化学式为 ##STR1## 的硝基邻苯二酚,其中 E 是化学式 ##STR2## 的基团,X 和 X' 分别表示具有 1 至 12 个碳原子的烷基、具有 1 至 12 个碳原子的烷氧基或具有 2 至 12 个碳原子的酰氧基,X 也可以是氢。Z 表示氢、具有 1 至 12 个碳原子的烷基或苯基,Y 表示氢、具有 1 至 12 个碳原子的烷基、苯甲基或氰乙基,R.sub.1、R.sub.2、R.sub.1 ' 和 R.sub.2 ' 分别独立地表示氢、具有 1 至 12 个碳原子的烷基、具有 2 至 8 个碳原子的烷氧基烷基、具有 5 或 6 个碳原子的环烷基、苯甲基或苯基,苯环 B 可以进一步被卤素、硝基或氨基取代,该氨基可以选择性地被具有 1 至 6 个碳原子的烷基取代。这些硝基邻苯二酚在与电子受体共反应时,特别有用作为色形成剂,可以产生强烈的绿色、蓝绿色或蓝色。