反应详情

温度

0 °C

To a suspension of NaH (0.5 g of 60% dispersion in oil) in DMF (10 ml) was added trifluoroethanol (0.92 ml) and the mixture stirred for 30 minutes. After this time the mixture was cooled to 0° C. and a solution of methyl 4-bromo-2-bromomethylbenzoate (3.52 g) in DMF was added, and the resultant mixture stirred at room temperature for 1 hour. 0.5 M HCl was added and the mixture extracted with ether. The organic extract was washed with water, dried (anhydrous magnesium sulphate) and filtered. The filtrate was evaporated to dryness to yield methyl 4-bromo-2-trifluoroethoxymethylbenzoate (3.89 g) as a yellow oil, NMR (CDCl3) 3.9(s,3H), 4.0(q,2H), 5.1(s,2H), 7.5(dr,1H), 7.85(d,1H), 7.9(s,1H).

1. extractionthe mixture extracted with ether
2. extractionThe organic extract
3. washwas washed with water
4. dry with materialdried (anhydrous magnesium sulphate)
5. filtrationfiltered
6. customThe filtrate was evaporated to dryness