反应详情

温度

120 °C

Into a solution of 9.74 g of tert-butyl (2R,5S)-2,5-dimethylpiperazine-1-carboxylate in 25 ml of DMI and 25 ml of acetonitrile were added 5 g of 2,4-difluorobenzonitrile and 11.4 g of cesium carbonate, followed by 2 days of stirring at 120° C. The reaction solution was poured into water, followed by extraction with ethyl acetate. After the organic layer was washed with saturated saline, it was dried over anhydrous sodium sulfate. The solvent was removed by evaporation and the resulting residue was purified by silica gel column chromatography to obtain 4.66 g of the title compound from an eluate eluted with hexane-ethyl acetate (80:20, v/v).

1. extractionfollowed by extraction with ethyl acetate
2. washAfter the organic layer was washed with saturated saline, it
3. dry with materialwas dried over anhydrous sodium sulfate
4. customThe solvent was removed by evaporation
5. customthe resulting residue was purified by silica gel column chromatography