Substituted 2,5-dimethoxy- and 2,5-diphenoxy-1,4-benzoquinones react with o-aminophenols to give an equilibrium mixture of 2-phenylamino-5-methoxy(phenoxy)-1,4-benzoquinones and semiketals. The equilibrium depends on the substitution of the components and the solvent. The semiketals are transformed to 3-hydroxy-2-phenoxazones in acid solution.
取代的2,5-二甲氧基-和2,5-二苯氧基-1,4-苯醌与邻
氨基苯酚反应,得到2-苯基
氨基-5-甲氧基(苯氧基)-1,4-苯醌和半
缩酮的平衡混合物。平衡取决于组分和溶剂的取代。将半
缩酮在酸溶液中转化为3-羟基-2-
苯并恶唑酮。