申请人:Sterling Drug Inc.
公开号:US04322352A1
公开(公告)日:1982-03-30
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之间的相互作用制备的3-芳基-3-吲哚基邻苯二甲酸酐,3-芳基-3-吡咯基邻苯二甲酸酐和3-芳基-3-咔唑基邻苯二甲酸酐,以及通过与适当的2-(吲哚基)羰基苯甲酸和适当的吲哚之间的相互作用制备的3,3-双(吲哚基)邻苯二甲酸酐,在压敏复写系统、热标记系统和版画复制系统中作为显色剂是有用的。