Sulfuric Acid → Benzanthrone

Participants

Reaction Steps

A 2 g amount of 3-aminobenzanthrone was dissolved in a mixture of 60 g of ice, 60 g of water and 15 ml of conc-sulfuric acid to obtain a solution. A solution of 2g of NaNO2 in 10 ml of water was gradually added to the solution. The mixture was stirred to react the components in order to obtain a diazonium salt of benzanthrone. The diazonium salt was gradually added to a solution of 5 g of KI in 10 ml of water and a small amount of copper powder was added to the solution. The mixture was heated to 80° C and reacted at 80° C for 1 hour and further at about 110° C for 1 hour. The resulting solid was extracted with hot benzene and treated with activated carbon and recrystallized from benzene whereby 3-iodobenzanthrone was obtained.

Provenance & Evidence