反应详情

A solution of 5-(2,6-difluoro-3-nitrophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole (1.23 g, 4 mmol) and N-bromosuccinimide (1.25 g, 7 mmol) in dichloromethane (10 mL) was stirred at room temperature for 18 h. The solution was washed with water, dried over anhydrous sodium sulfate and concentrated. Crude 4-bromo-5-(2,6-difluoro-3-nitrophenyl)-1-(tetrahydro-2H-pyran-2-yl)-1H-pyrazole was obtained.

1. washThe solution was washed with water
2. dry with materialdried over anhydrous sodium sulfate
3. concentrationconcentrated