Process for the preparation of 1-amino-4-bromoanthraquinones
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United States of America Patent
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May 26, 1992
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N/A
app pub date -
May 2, 1991
filing date -
May 2, 1991
priority date (Note) -
Expired
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Abstract
Disclosed is a process for the preparation of 1-amino-4-bromoanthraquinones by the bromination of the corresponding 1-aminoanthraquinone wherein a 1-amino-anthraquinone is contacted with elemental bromine in the presence of a carboxylic acid solvent and added hydrobromic acid. The process is not as complicated as known processes and produces lower amounts of isomeric 1-amino-2-bromoanthraquinones.
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