Process for the preparation of a mixture of 1-amino-2-chloro-4- hydroxyanthraquinone and 1-amino-2-bromo-4-hydroxyanthraquinone

摘要

A process for the preparation of a mixture of 1-amino-2-chloro- 4- hydroxyanthraquinone and 1-amino-2-bromo-4-hydroxyanthraquinone, which mixture contains a high proportion of 1-amino-2-chloro-4- hydroxyanthraquinone, by chlorinating and brominating 1- aminoanthraquinone and reacting the intermediate so obtained with concentrated or fuming sulfuric acid.