Substituted furopyridinones and furopyrazinones which are useful as color formers in pressure-sensitive carbonless duplicating systems and thermal marking systems are prepared by reacting diphenylamines with substituted benzoyl (or 3-indolylcarbonyl)pyridinecarboxylic acids and substituted benzoyl (or 3-indolylcarbonyl)pyrazinecarboxylic acids, respectively.
本发明涉及一种在压敏无碳复写系统和热标记系统中用作颜色形成剂的取代
呋喃吡啶酮和取代
呋喃吡嗪酮的制备方法。该方法通过将
二苯胺与取代苯甲酰(或3-
吲哚甲酰)
吡啶羧酸和取代苯甲酰(或3-
吲哚甲酰)
吡嗪羧酸分别反应而制备得到。