反应详情

温度

85 °C

In a 1 L round bottom flask was added methanesulfonic acid (S)-2-oxo-pyrrolidin-3-yl ester (prepared according to procedure in Eur. Pat. Appl., 257602, 2 Mar. 1988) (18.75 mmol, 3.36 g) and (4-methoxy-3-methyl-phenyl)-piperidin-4-yl-methanone (18.75 mmol, 4.37 g) in DIEA (75 mmol, 13.1 mL) and acetonitrile (100 mL). The reaction mixture was heated at 85° C. for 4 hours. The reaction was evaporated under a vacuum and silica gel flash column chromatography was performed on the remaining residue eluting with ethyl acetate to 20% MeOH/ethyl acetate to provide the title compound as a white solid (4 g, 67.4% yield). Calculated for C18H24N2O3 MS=316.4036. found MS (ESI) m/e 317.1863 (M+H+); 1H NMR (400 MHz, MeOD) δ ppm 1.69-1.89 (m, 4H) 2.08-2.21 (m, 1H) 2.24-2.30 (m, 1H) 2.44-2.56 (m, 1H) 2.73-2.84 (m, 1H) 2.84-2.92 (m, 1H) 3.08-3.17 (m, 1H) 3.30-3.42 (m, 6H) 3.45-3.54 (m, 1H) 3.90 (s, 3H) 6.95-7.04 (m, 1H) 7.72-7.81 (m, 1H) 7.83-7.90 (m, 1H); analytical RP-HPLC retention time=4.67 min.

1. customThe reaction was evaporated under a vacuum and silica gel flash column chromatography
2. washeluting with ethyl acetate to 20% MeOH/ethyl acetate