反应详情

温度

100 °C

A mixture of ethyl 6,7-dihydro-4-hydroxy-7-isobutyl-6-oxothieno[2,3-b]pyridine-5-carboxylate (0.1 g, 0.34 mmol), 3-(piperidin-1-yl)propan-1-amine (96 mg, 0.68 mmol) and toluene (15 mL) was heated at 100° C. for 2 h and cooled to room temperature. Solvent was removed under reduced pressure; the residue was purified on a silica gel flash chromatography column eluted with 3% methanol-dichloromethane to afford the title compound as a colorless oil (0.11 g, 83% yield). 1H NMR (400 MHz, CDCl3): δ 10.20 (br s, 1 H), 7.38 (d, 1 H), 6.95 (d, 1 H), 3.92 (d, 2 H), 3.49-3.44 (m, 2 H), 2.90-2.78 (m, 6 H), 2.40 (m, 1 H), 2.20-1.38 (m, 8 H), 1.00 (d, 6 H); MS: m/e 392 (M+H+).

1. temperaturecooled to room temperature
2. customSolvent was removed under reduced pressure
3. customthe residue was purified on a silica gel flash chromatography column
4. washeluted with 3% methanol-dichloromethane