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.
                            通过与适当的2-(杂环芳基)羰基
苯甲酸和适当的
苯胺相互作用制备的3-芳基-3-
吲哚基邻苯二酮、3-芳基-3-
吡咯基邻苯二酮和3-芳基-3-
咔唑基邻苯二酮,以及通过与适当的2-(
吲哚基)羰基
苯甲酸和适当的
吲哚相互作用制备的3,3-双(
吲哚基)邻苯二酮,在压敏无碳复写系统、热标记系统和蜡纸复印系统中作为
显色剂非常有用。