反应详情

To a solution of Example 19B (75 g, 0.34 mol, 1 equivalent) in 2-ethoxyethanol (1.2 L), benzylamine (44 mL, 0.41 mol, 1.2 equivalents) was added. Triethylamine (60 mL, 0.43 mol, 1.28 equivalents) was then added, and the resultant mixture was refluxed for 12 hours. The reaction mixture was cooled and concentrated under reduced pressure. This crude material was purified by column chromatography on silica gel using a gradient of 0-10% methanol-ethyl acetate to provide the title compound. 1H NMR (300 MHz, DMSO-d6) δ ppm 1.93-2.03 (m, 1H), 2.1-2.17 (m, 1H), 3.23 (d, 1H, J=12.3 Hz), 3.55 (d, 1H, J=4.2 Hz), 3.63 (d, 1H, J=16.5 Hz), 4.15 (m, 1H), 4.32 (bs, 1H), 4.47-4.59 (m, 3H), 5.16 (s, 1H), 7.24-7.37 (m, 5H).

1. temperatureThe reaction mixture was cooled
2. concentrationconcentrated under reduced pressure
3. customThis crude material was purified by column chromatography on silica gel using a gradient of 0-10% methanol-ethyl acetate