反应详情

4.2 g of 5-(bromoacetyl)-2,3-dimethoxybenzonitrile dissolved in 150 ml of methylene chloride are treated with 8.9 ml of boron tribromide. The reaction mixture is stirred at 20° for 18 hours. It is subsequently poured into 220 ml of saturated sodium hydrogen carbonate solution and 100 g of ice, adjusted to pH 6 with glacial acetic acid and extracted with ethyl acetate. The organic phase is washed with water, dried over sodium sulfate and evaporated. There is obtained 5-(bromoacetyl)-2,3-dihydroxybenzonitrile as an amorphous solid.

1. extractionextracted with ethyl acetate
2. washThe organic phase is washed with water
3. dry with materialdried over sodium sulfate
4. customevaporated