反应详情

温度

0 °C

To a solution of 1-benzyl-3-piperidinone (0.193 g, 1.02 mmol) in toluene dry (10 mL) cooled at 0° C. was added a solution of phenyl magnesium bromide 3.1M in THF (0.48 mL, 1.4 mmol). The resulting solution was maintained at 0° C. for 2 h, then was allowed to warm at 25° C. for 1 h. Water (50 mL) was added and the mixture was extracted with EtOAc (2×50 mL). The collected organic phase was dried and concentrated under reduced pressure. The crude compound was purified by flash chromatography on silica gel using EtOAc/cyclohexane as eluant to afford the title compound as a white solid (0.235 g, 80%). 1H NMR (CDCl3): 1.65-1.85 (m, 3H), 1.9-2.15 (m, 1H), 2.067 (bd, J=8.1 Hz, 1H), 2.34 (d, J=11.1 Hz, 1H), 2.77 (d, J=11.1 Hz, 1H), 2.95 (bd, J=8.1 Hz, 1H), 3.60 (s, 2H), 4.005 (bs, 1H), 7.2-7.4 (m, 8H), 7.50 (s, 1H), 7.525 (s, 1H).

1. temperatureThe resulting solution was maintained at 0° C. for 2 h
2. temperatureto warm at 25° C. for 1 h
3. extractionthe mixture was extracted with EtOAc (2×50 mL)
4. customThe collected organic phase was dried
5. concentrationconcentrated under reduced pressure
6. customThe crude compound was purified by flash chromatography on silica gel