反应详情

0.5 g of 3,4-dimethoxy-5-nitrobenzophenone is stirred at 110° for 30 hours in a mixture of 4 ml of acetic acid and 4 ml of 48 percent aqueous hydrobromic acid. The reaction mixture is subsequently evaporated to dryness. The residue is taken up in methylene chloride. It is washed with water, dried over sodium sulfate and evaporated. After recrystallization from methylene chloride/hexane there is obtained 3,4-dihydroxy-5-nitrobenzophenone of m.p. 132°.

1. customThe reaction mixture is subsequently evaporated to dryness
2. washIt is washed with water
3. dry with materialdried over sodium sulfate
4. customevaporated
5. customAfter recrystallization from methylene chloride/hexane there