反应详情

To a solution of 9.00 g (46.8 mmol)) 2,6-diethyl-4-methoxy-benzaldehyde in 50 ml dichloromethane at −78° C. was added 103 ml (103 mmol) of a 1 M solution of boron tribromide in dichloromethane and the reaction mixture was allowed to warm to room temperature and then heated at reflux for 16 h. The reaction mixture was quenched by pouring onto ice and the resulting mixture was then diluted with ethyl acetate and washed sequentially with water and with saturated brine. The phases were separated and the organic phase was dried over Na2SO4, filtered and concentrated in vacuo to afford 8.68 g (100%) of the title compound as a brown crystalline solid. MS (ISP): 177.4 ([M-H]−, 100%).

1. temperatureheated
2. temperatureat reflux for 16 h
3. customThe reaction mixture was quenched
4. additionby pouring onto ice
5. additionthe resulting mixture was then diluted with ethyl acetate
6. washwashed sequentially with water and with saturated brine
7. customThe phases were separated
8. dry with materialthe organic phase was dried over Na2SO4
9. filtrationfiltered
10. concentrationconcentrated in vacuo