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.
用于压敏无碳复写系统、热标记系统和蜡纸复印系统的3-杂环芳基-3-(
二苯胺基)
邻苯二甲酸酐,通过将2-(杂环芳基羰基)-
苯甲酸与
二苯胺反应制备。