申请人:Sterling Drug Inc.
公开号:US04431819A1
公开(公告)日:1984-02-14
3-Heteroaryl-3-(diphenylamino)phthalides useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems are prepared by reacting 2-(heteroarylcarbonyl)benzoic acids with diphenylamines.
3-杂环芳基-3-(二苯胺基)邻苯二甲酸酐可用作压敏无碳复写系统、热标记系统和蜡纸复印系统中的显色剂,通过将2-(杂环芳基羰基)苯甲酸与二苯胺反应制备。