反应详情

A mixture of 2.93 g (9.7 mmol) of 3,3',4,4'-tetramethoxybenzophenone (prepared according to Example 1), 9 g of glacial acetic acid and 1.88 g (19.4 mmol) of 65 percent strength nitric acid was stirred at room temperature for 7.5 h. 22 ml of water was then added dropwise, and the resulting precipitate was filtered off, washed 2×6 ml of water and dried to give 2.41 g of a beige solid. The yield of the product was 71.5 percent of theory. Further data concerning the product was:

1. filtrationthe resulting precipitate was filtered off
2. washwashed 2×6 ml of water
3. customdried