反应详情

温度

60 °C

To a 100 mL round bottom flask containing 5-bromo-2-chloro-3-nitropyridine (2.00 g, 8.43 mmol) in DMSO (10 mL) was added 2,2-dimethylmorpholine (commercially available from ChemBridge Corporation) (1.9 mL, 16.9 mmol) dropwise. The reaction was heated to 60° C. and monitored with TLC and LC-MS. After 2.5 h, LC-MS showed that the reaction was complete. The mixture was cooled to rt then diluted with water. After extracting three times with EtOAc, the organic layers were combined then washed with brine and dried over anhydrous magnesium sulfate. After filtration, the mixture was concentrated under reduced pressure to afford an orange oil as 4-(5-bromo-3-nitropyridin-2-yl)-2,2-dimethylmorpholine. 1H NMR (400 MHz, CDCl3) δ ppm 8.34 (1H, d, J=2.2 Hz), 8.25 (1H, d, J=2.2 Hz), 3.87 (2H, m), 3.36 (4H, m), 1.26 (6H, s).

1. temperatureThe mixture was cooled to rt
2. extractionAfter extracting three times with EtOAc
3. washthe organic layers were combined then washed with brine
4. dry with materialdried over anhydrous magnesium sulfate
5. filtrationAfter filtration
6. concentrationthe mixture was concentrated under reduced pressure