| abstract |
PROBLEM TO BE SOLVED: To provide a method for producing a triphendioxazine dye which is amidated on both sides and a novel triphendioxazine dye. To produce a triphendioxazine asymmetrically or bilaterally amidated on both sides In the method It relates to a process, characterized in that the triphendioxazine chromophore, which is optionally amidated on one side, is reduced to the leuco form, the leuco form is amidated and reoxidized. In this way, a double-sided amidated product is obtained in high yield and product quality. Furthermore, new triphene dioxazine dyes are produced in this manner. |