反应详情

1-Benzyl-4-[N-ethylamino]methylpiperidine (EXAMPLE 175, 7.59, 32.64 mmol), 2-chloro-3-nitropyridine (5.17 g, 32.64 mmol) and potassium carbonate (5.41 g, 39.17 mmol) in acetonitrile (0.25M) are refluxed 48 hr. The mixture is diluted with water and extracted with ethyl acetate and then dichloromethane. The combined extracts are dried over sodium sulfate, concentrated and chromatographed (silica gel column, 300 g; eluting with 15-80% ethyl acetate/hexane), to give the title compound, NMR (300 MHz, CD3OD) 8.43, 8.20, 7.42, 6.90, 3.61, 3.52, 3.49, 3.00, 2.10, 1.80, 1.37 and 1.25δ.

1. extractionextracted with ethyl acetate
2. dry with materialThe combined extracts are dried over sodium sulfate
3. concentrationconcentrated
4. customchromatographed
5. wash(silica gel column, 300 g; eluting with 15-80% ethyl acetate/hexane)