Sulfuric Acid → 2-Neopentylanthraquinone

Participants

Reaction Conditions

Reaction Steps

90 g (0.3 mole) of this 2-(4-neopentylbenzoyl)-benzoic acid were introduced into 900 g of 100 percent strength sulfuric acid at 60° C. and then stirred for 4 hours at 85° C. The reaction mixture was then poured into a mixture of 1,500 g of water and 500 g of ice, and the stirred mixture was cooled. The precipitated crystals of neopentylanthraquinone were filtered off, washed neutral with dilute sodium hydroxide solution and water, dried, and distilled at 240° C./0.5 mbar. 75.3 g (89%) of 2-neopentylanthraquinone (mp. 93.8° C.) were obtained.

Provenance & Evidence