反应详情

2,5-Difluoronitrobenzene (2.69 ml, 24.84 mmol), 1-benzyl-4-methylaminopiperidine (EXAMPLE 9, 5.00 g, 24.84 mmol), and potassium carbonate (4.12 g, 29.81 mmol) are refluxed in acetonitrile for 21 hr. The mixture is then poured into water and extracted with chloroform. The extract is dried over sodium sulfate, filtered and concentrated. The concentrate is chromatographed (silica gel; ethyl acetate/hexane) to give the title compound, NMR (300 MHz, CD3OD) 7.45, 7.37, 7.29, 3.46, 2.99, 2.87, 2.64, 1.98 and 1.67δ.

1. extractionextracted with chloroform
2. dry with materialThe extract is dried over sodium sulfate
3. filtrationfiltered
4. concentrationconcentrated
5. customThe concentrate is chromatographed (silica gel; ethyl acetate/hexane)