反応 #1174124
ord-fdc13a55f8cd4913a73de2829c115f78
反応方程式
反応条件
実験手順
A mixture of 1,8-dichloroanthraquinone (13.8 g, 0.05 mol), 3-amino-2,2-dimethylpropanol (20.6 g, 0.20 mol) and 2-ethoxyethanol (100 mL) is heated at about 130° C. for 20 hours. The reaction mixture is drowned into water (1L) and the mixture is acidified with concentrated hydrochloric acid. The product, 1,8 -bis[(3-hydroxy-2,2-dimethylpropyl)amino]anthraquinone, is obtained in an essentially quantitative yield by filtering, washing with water and drying in air. Recrystallization from toluene, followed by filtration, washing with hexane and air drying gives 16.0 g of purified crystalline product. The product may be purified further by recrystallization from methanol. Thin layer chromatography shows that the product contains only one colored component and mass spectrometry analysis is consistent with 1,8-bis[(3-hydroxy-2,2-dimethylpropyl)amino]anthraquinone. The bluish-red product has an absorption maximum at 556 nm and an extinction coefficient (ε) of 12,228 in methylene chloride.