反应详情

A flask is charged with N-methyl-N-methoxy-nicotinamide (1.0 g, 6.02 mmol) and THF (10 mL). Propyl magnesium chloride (2M in THF, 3.31 mL, 6.62 mmol) is added and the mixture is stirred at room temperature overnight. It is quenched with saturated sodium bicarbonate solution and extracted with dichloromethane. The combined organic layer is dried over sodium sulfate and concentrated in vacuo to afford 1-pyridin-3-yl-butan-1-one as a yellow oil. 1H NMR (400 MHz, CDCl3) δ ppm 1.03 (t, J=7.5 Hz, 3H), 1.74-1.87 (m, 2H), 2.97 (t, J=7.3 Hz, 2H), 7.42 (dd, J=8.0, 4.9 Hz, 1H), 8.24 (dt, J=8.0, 2.0, 1.9 Hz, 1H), 8.78 (dd, J=4.9, 2.0 Hz, 1H), 9.18 (d, J=2.0 Hz, 1H).

1. customIt is quenched with saturated sodium bicarbonate solution
2. extractionextracted with dichloromethane
3. dry with materialThe combined organic layer is dried over sodium sulfate
4. concentrationconcentrated in vacuo