Dimethylformamide → 2,2',4,4'-Tetrahydroxybenzophenone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

440 g (3.30 mol) of AlCl3 were stirred into 120 g (1.64 mol) of dimethylformamide in such a way that the temperature remained below 160° C. After cooling to 30° C., 60.5 g (0.20 mol) of 2,2',4,4'-tetramethoxybenzophenone were introduced into the mixture, which was easily stirrable. The mixture was stirred at about 50°-52° C. for 4.5 hours and then added to 1.8 l of water to which 3 g of active carbon had been added. The hydrolyzate was filtered at about 95° C., and then 65 g of concentrated hydrochloric acid were added to the filtrate. The precipitate was filtered off with suction at 25° C., washed with water and dried at 125° C. under reduced pressure.

Herkunft & Nachweise