反应详情

温度

27 °C

To a solution of tert-butyl 2-methyl-1H-pyrrolo[2,3-b]pyridine-3-carboxylate (5.0 g, 21.53 mmol) in CH3CN (50 mL) was added Cs2CO3 (21.0 g, 64.58 mmol), potassium iodide (3.57 g, 21.53 mmol). The mixture was stirred at 27° C. for 30 minutes. Then 3-chlorobutan-2-one (2.75 g, 25.83 mmol) was added and the mixture was stirred at 70° C. for 12 hours. The mixture was filtered and the filtrate was concentrated. The residue was purified by column (Elute: Petroleum ether:Ethyl acetate=50:1) to give tert-butyl 2-methyl-1-(3-oxobutan-2-yl)-1H-pyrrolo[2,3-b]pyridine-3-carboxylate as a yellow-green oil. (3.23 g, yield 50%) LCMS (M+H+) m/z: calcd 303.37. found 302.9. 1H NMR (400 MHz, CDCl3): ä 8.32-8.30 (m, 1H), 8.25-8.23 (m, 1H), 7.17-7.14 (m, 1H), 5.50-5.44 (m, 1H), 2.71 (s, 3H), 1.96 (s, 3H), 1.65-1.67 (d, 3H), 1.64 (s, 9H).

1. stirringthe mixture was stirred at 70° C. for 12 hours
2. filtrationThe mixture was filtered
3. concentrationthe filtrate was concentrated
4. customThe residue was purified by column (Elute: Petroleum ether:Ethyl acetate=50:1)