反应详情

1.0M Diisobutylaluminum hydride in hexanes (6.2 mL, 6.2 mmol) was added dropwise to a solution of methyl 3-bromo-5-[(dimethylamino)methyl]benzoate (0.50 g, 1.8 mmol, from Step A) in tetrahydrofuran (10 mL) at −78° C. After stirring for 2 hours, the mixture was quenched with saturated potassium sodium tartrate solution and was allowed to warm to room temperature. Ethyl acetate was added and the mixture was then stirred until a biphasic solution formed. The ethyl acetate layer was washed with water (3×), followed by brine, was dried over sodium sulfate and concentrated to give a light yellow oil (0.41 g, 93%). 1H NMR (300 MHz, CDCl3) δ 7.41 (dd, J=1.7 Hz, 1H), 7.37 (dd, J=1.8 Hz, 1H), 7.24 (dd, J=1.4, 0.7 Hz, 1H), 4.65 (s, 2H), 3.37 (s, 2H), 2.22 (s, 6H). LCMS (M+H)+: 244.0, 246.0.

1. customthe mixture was quenched with saturated potassium sodium tartrate solution
2. additionEthyl acetate was added
3. stirringthe mixture was then stirred until a biphasic solution
4. customformed
5. washThe ethyl acetate layer was washed with water (3×)
6. dry with materialwas dried over sodium sulfate
7. concentrationconcentrated