反应详情

A solution of 2,3-dihydro-benzo[1,4]dioxin-6-ylamine (32 g, 212 mmol) in dichloromethane (1 litre) was treated with a solution of bromine (10.8 mL, 212 mmol) in dichloromethane (100 mL) at 0° C. After the addition the mixture was stirred at room temperature for 1 hour then washed with saturated aqueous sodium bicarbonate solution containing a small amount of sodium sulphite. The organic extract was dried and evaporated to an oil that was chromatographed on silica gel eluting with dichloromethane to afford an oil (14.8 g, 30%).

1. additionAfter the addition the mixture
2. washthen washed with saturated aqueous sodium bicarbonate solution
3. additioncontaining a small amount of sodium sulphite
4. extractionThe organic extract
5. customwas dried
6. customevaporated to an oil that
7. customwas chromatographed on silica gel eluting with dichloromethane