3-Aryl-3-indolylphthalides, 3-aryl-3-pyrrolylphthalides and 3-aryl-3-carbazolylphthalides prepared by interaction of the appropriate 2-(heteroaryl)carbonylbenzoic acid and the appropriate phenylamine, and 3,3-bis(indolyl)phthalides prepared by the interaction of the appropriate 2-(indolyl)carbonylbenzoic acid and the appropriate indole are useful as color formers in pressure-sensitive carbonless duplicating systems, thermal marking systems and hectographic copying systems.
通过适当的2-(杂环芳基)
羧酸苯和适当的
苯胺之间的相互作用制备的3-Aryl-3-indolylphthalides、3-aryl-3-pyrrolylphthalides和3-aryl-3-carbazolylphthalides,以及通过适当的2-(
吲哚基)
羧酸苯和适当的
吲哚之间的相互作用制备的3,3-双(
吲哚基)
邻苯二甲酸酯,在压敏无
碳复写系统、热标记系统和电写复印系统中作为
显色剂有用。