This invention relates to 3-aryl or heteroaryl-3-alkoxy, phenoxy-, alkylthio- or phenylthiophthalides useful as color formers, particularly in carbonless duplicating and thermal marking systems, which are prepared by the interaction of 2-(disubstituted amino)phenylcarbonylbenzoic acids with an acid chloride or an anhydride of an alkanoic acid in the first step and a further reaction of the product of the first step with an alcohol, a thioalcohol, a phenol or a thiophenol in a second step.
本发明涉及一种用作彩色形成剂的3-芳基或杂芳基-3-烷氧基、苯氧基、烷
硫基或苯
硫基
邻苯二甲酸酐,特别是在无碳复写和热标记系统中有用。这些化合物是通过第一步中2-(二取代
氨基)苯甲酰基
苯甲酸与酸
氯或
脂肪酸酸酐的反应,以及第二步中所得产物与醇、
硫醇、
酚或
硫酚的进一步反应制备而成。