发明授权
- 专利标题: 2-[(3-Indolyl)carbonyl]-4/5-carboxybenzoic acids
- 专利标题(中): 2 - [(3-吲哚基)羰基] -4 / 5-羧基苯甲酸
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申请号: US130353申请日: 1980-03-14
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公开(公告)号: US4351768A公开(公告)日: 1982-09-28
- 发明人: Nathan N. Crounse , Paul J. Schmidt
- 申请人: Nathan N. Crounse , Paul J. Schmidt
- 申请人地址: NY New York
- 专利权人: Sterling Drug Inc.
- 当前专利权人: Sterling Drug Inc.
- 当前专利权人地址: NY New York
- 优先权: CAX296986 19780216; GBX6228/78 19780216
- 主分类号: B41M5/025
- IPC分类号: B41M5/025 ; B41M5/145 ; C07D207/32 ; C07D207/333 ; C07D209/12 ; C07D209/86 ; C07D209/24
摘要:
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.
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