反应详情

Combine 3-Bromo-4-hydroxy-benzaldehyde (1.5 g, 7.5 mmol) with 3-methylbutylamine (867 μL, 7.5 mmol), MeOH (25 mL) and molecular sieves 3A (5.8 g) and stir at room temperature overnight. Add NaBH4 (1.4 g, 37.3 mmol) and stir at room temperature for 2 hours. Filtrate over celite with MeOH and eliminate the solvent. Purify by SCX ion-exchange chromatography to afford the title compound (1.5 g, 75%). 1H-NMR (CD3OD, 300 MHz): 7.52 (d, 1H, J=2.0 Hz), 7.17 (dd, 1H, J=2.0 and 8.5 Hz), 6.87 (d, 1H, J=8.5 Hz), 3.80 (s, 2H), 2.79-2.74 (m, 2H), 1.76-1.63 (m, 1H), 1.54 (q, 2H, J=6.8 Hz), 0.99 (d, 6H, J=6.56 Hz). 13C-NMR (CD3OD, 300 MHz): 158.6, 134.9, 130.7, 128.6, 118.8, 112.7, 53.3, 47.9, 38.6, 27.8, 23.3.

1. customPurify by SCX ion-exchange chromatography