反应详情

温度

70 °C

To 5-bromo-2-nitropyridine (1.0 g, 4.93 mmol, Eq: 1.00) in DMSO (10.0 ml) was added 1-isopropylpiperazine (632 mg, 4.93 mmol, Eq: 1.00), and the resulting solution was heated at 70° C. for 18 hours. The solution was cooled to room temperature. The solution was diluted with 50 ml water. The resulting solid was filtered. The solid was washed with water and dried under vacuum. The crude material was purified by flash chromatography (silica gel, 80 g, 0% to 3% MeOH/DCM gradient) to give 1-isopropyl-4-(6-nitropyridin-3-yl)piperazine (788 mg, 64%). LC/MS-ESI observed [M+H]+ 251.

1. temperatureThe solution was cooled to room temperature
2. filtrationThe resulting solid was filtered
3. washThe solid was washed with water
4. customdried under vacuum
5. customThe crude material was purified by flash chromatography (silica gel, 80 g, 0% to 3% MeOH/DCM gradient)