Methanol → Anthraquinone

Participants

Reaction Steps

1-Amino-2-bromo-4-phenylthioanthraquinone (4.1 parts) and 3-β-hydroxyethylsulfonylphenol (2.1 parts) were allowed to react with each other at 100 to 120° C. in dimethylformamide in the presence of potassium carbonate. After completion of the reaction, methanol was added to the reaction mixture to deposit crystals, which were then collected on a filter, well washed with water and then dried at 80° C. The product obtained was subjected to both sulfonation and esterification at 20° to 40° C. in 10% oleum. Ice was added to the reaction mixture to deposit crystals, which were then collected on a filter to obtain an anthraquinone compound of the following formula (free acid form). ##STR182##

Provenance & Evidence