反应详情

温度

0 °C

To a suspension of sodium hydride (0.11 g, 4.65 mmol) in dry THF (1.5 mL) under an inert atmosphere cooled to 0° C. was added diethyl 3-cyclopropyl-5-(5-(trifluoromethyl)pyridin-2-yloxy)benzylphosphonate (0.8 g, 1.86 mmol) as a solution in THF (6 mL). The mixture was stirred for 30 min at 0° C. N-Boc piperidone (0.37 g, 1.86 mmol) was added as a solution in THF (3 mL) and the mixture was stirred at RT for 5 h. The reaction was cooled to 0° C. and quenched with saturated aqueous ammonium chloride. The mixture was extracted with ethyl acetate three times. The organic layer was washed with brine, dried over Na2SO4 and evaporated to dryness. The residue was purified by silica gel column chromatography (10% ethyl acetate in hexane) to give the title compound (0.408 g, 46%). 1H NMR (500 MHz, CDCl3): δ 8.45 (s, 1H), 7.87 (d, J=8 Hz, 1H), 6.97 (d, J=8.5 Hz, 1H), 6.79 (s, 1H), 6.74 (s, 1H), 6.68 (s, 1H), 6.30 (s, 1H), 3.49 (m, 2H), 3.39 (m, 2H), 2.45 (m, 2H), 2.31 (m, 2H), 1.88 (m, 1H), 1.46 (s, 9H), 0.96 (d, J=8.5 Hz, 2H), 0.69 (d, J=4.5 Hz, 2H); m/z (475.1, M+ H+).

1. stirringthe mixture was stirred at RT for 5 h
2. temperatureThe reaction was cooled to 0° C.
3. customquenched with saturated aqueous ammonium chloride
4. extractionThe mixture was extracted with ethyl acetate three times
5. washThe organic layer was washed with brine
6. dry with materialdried over Na2SO4
7. customevaporated to dryness
8. customThe residue was purified by silica gel column chromatography (10% ethyl acetate in hexane)