申请人:STERLING DRUG INC.
公开号:EP0110366A2
公开(公告)日:1984-06-13
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 (pyridylethylaminophe- nyl)carbonylbenzoic acids with 4-hydroxy- or alkoxyanilines or by the interaction of (disubstituted aminophenyl)carbonylben- zoic 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-吡啶乙氨基取代的荧烷可用作显色剂,特别是在压敏无碳复写系统和热敏打标系统中,其制备方法是(吡啶乙氨基苯基)羰基苯甲酸与 4-羟基或烷氧基苯胺作用,或(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作用。通过 N-吡啶乙基-3-羟基苯胺与取代或未取代的邻苯二甲酸酐相互作用,制备出氟化合物所需的(吡啶乙基氨基苯基)羰基苯甲酸中间体。N-吡啶乙基-4-羟基或烷氧基苯胺和 N-吡啶乙基-3-羟基苯胺是通过各自的苯胺与乙烯基吡啶作用制备的。