反应详情

温度

0 °C

4.26 g of 2-bromo-4-trifluoromethyl-6-trimethylsilanylethynyl-phenylamine (13 mmol) were dissolved in 40 ml THF and the solution was cooled to 0° C. Then 15.2 ml of a 1 M solution of tetrabutylammonium fluoride in THF (15 mmol) were added and the reaction mixture was stirred for 20 min at 0° C. After addition of water, the mixture was extracted with EtOAc and the combined organic extracts were washed with brine, dried with magnesium sulfate, filtered and concentrated. 1.82 g (54%) of 2-bromo-6-ethynyl-4-trifluoromethyl-phenylamine were isolated as a brown solid after purification (silica gel; cyclohexane/EtOAc 9:1). 1H NMR (CDCl3, 300 MHz): δ 3.48 (s, 1H), 5.03 (br s, 2H), 7.54 (s, 1H), 7.65 (s, 1H).

1. extractionthe mixture was extracted with EtOAc
2. washthe combined organic extracts were washed with brine
3. dry with materialdried with magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated