反应详情

A suspension of 0.291 ml (4.12 mmol) of 2-bromoethanol, of 0.3 g (2.75 mmol) of 2-hydroxy-5-methylpyridine and of 0.85 g (6.18 mmol) of potassium carbonate in 3 ml of dimethylformamide is vigorously stirred for 12 hours at reflux. The mixture is subsequently diluted with 100 ml of water and extracted with 100 ml of dichloromethane. The organic phase is washed with 50 ml of water, dried over sodium sulphate, concentrated under reduced pressure and then chromatographed on a silica column, elution being carried out with a mixture of hexane and ethyl acetate. The expected product is thus isolated.

1. temperatureat reflux
2. extractionextracted with 100 ml of dichloromethane
3. washThe organic phase is washed with 50 ml of water
4. dry with materialdried over sodium sulphate
5. concentrationconcentrated under reduced pressure
6. customchromatographed on a silica column, elution
7. additionbeing carried out with a mixture of hexane and ethyl acetate