| 摘要 |
The present invention relates to a process for preparing 1-amino-4-hydroxyanthraquinones of the formula (I) wherein R is an aliphatic or aromatic radical, by reacting 1,4-dihydroxyanthraquinone, optionally as a mixture with 2,3-dihydro-1,4-dihydroxyanthraquinone, with aliphatic or aromatic amines in the presence of N-methyl-2-pyrrolidone.
|
