反应详情

温度

85 °C

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.

1. temperaturethe stirred mixture was cooled
2. filtrationThe precipitated crystals of neopentylanthraquinone were filtered off
3. washwashed neutral with dilute sodium hydroxide solution and water
4. customdried
5. distillationdistilled at 240° C./0.5 mbar