Phosphorus oxychloride → 2,8-Dichloro-4-phenylquinazoline

Participants

Reaction Conditions

Reaction Steps

To 1.24 g of 8-chloro-4-phenyl-2(1H)-quinazolinone (compound No. IV-4) was added 6.65 g of phosphorus oxychloride, followed by stirring at 95° C. for 1 hour. The resulting reaction solution was poured into 200 ml of ice water and sodium bicarbonate was added thereto, thereby adjusting the pH 9. Then, precipitated crystals were collected by filtration and recrystallized from ethanol to obtain 1.07 g of the titled compound. Mp.154.4.° C. 1H NMR (CDCl3): 7.52-7.65 (4H, m), 7.76-7.80 (2H, m), 8.02-8.08 (2H, m).

Provenance & Evidence