2-And/or 6-pyridylethylamino-substituted fluorans useful as color formers, particularly in pressure-sensitive carbonless duplicating systems and thermal-responsive marking systems are prepared by the interaction of (pyridylethylaminophenyl)carbonylbenzoic acids with 4-hydroxy- or alkoxyanilines or by the interaction of (disubstituted aminophenyl)carbonylbenzoic acids with N-pyridylethyl-4-hydroxy- or alkoxy acetanilides. The (pyridylethylaminophenyl)carbonylbenzoic acid intermediates required for the fluorans are prepared by interacting a N-pyridylethyl-3-hydroxyaniline with a substituted or unsubstituted phthalic anhydride. The N-pyridylethyl-4-hydroxy- or alkoxyanilines and the N-pyridylethyl-3-hydroxyanilines are prepared by interacting the respective aniline with a vinylpyridine.
2-和/或6-
吡啶乙基
氨基取代的
氟兰在颜色形成剂中有用,特别适用于压敏无碳复写系统和热响应标记系统,通过(
吡啶乙基
氨基苯基)羰基
苯甲酸与
4-羟基或烷氧基
苯胺的相互作用制备,或通过(二取代
氨基苯基)羰基
苯甲酸与N-
吡啶乙基-
4-羟基或烷氧基
乙酰苯胺的相互作用制备。用于制备
氟兰的(
吡啶乙基
氨基苯基)羰基
苯甲酸中间体通过将N-
吡啶乙基-3-羟基
苯胺与取代或未取代的邻苯二酐相互作用制备。N-
吡啶乙基-
4-羟基或烷氧基
苯胺和N-
吡啶乙基-3-羟基
苯胺通过将相应
苯胺与
乙烯吡啶相互作用制备。