反应详情

温度

0 °C

5-Bromo-1-(bromomethyl)-2-methoxy-3-methylbenzene (0.88 g, 3.0 mmol) and tert-butyl 4-(hydroxymethyl)-4-phenylpiperidine-1-carboxylate (0.79 g, 2.7 mmol) were combined in dimethylformamide (9 mL) and cooled to 0° C. The reaction was treated with sodium hydride (144 mg, 5.99 mmol), stirred at 0° C. for 1 h, and at room temperature for 30 min. The reaction mixture was diluted with water and extracted with ethyl acetate (2×). The organic layers were pooled together, washed with brine (2×), dried over sodium sulfate, and concentrated. Column chromatography on silica gel (10% ethyl acetate/hexanes) gave 1.24 g (82%). 1H-NMR (CDCl3, 500 MHz) δ 7.34-7.35 (m, 4H), 7.21-7.24 (m, 1H), 7.19-7.20 (m, 1H), 7.10 (m, 1H), 4.34 (s, 2H), 3.72-3.76 (m, 2H), 3.53 (s, 3H), 3.43 (s, 2H), 3.01-3.07 (m, 2H), 2.21 (s, 3H), 2.17-2.19 (m, 2H), 1.85-1.91 (m, 2H), 1.43 (s, 9H). Mass spec.: 506.45 (MH)+.

1. waitat room temperature for 30 min
2. extractionextracted with ethyl acetate (2×)
3. washwashed with brine (2×)
4. dry with materialdried over sodium sulfate
5. concentrationconcentrated
6. customColumn chromatography on silica gel (10% ethyl acetate/hexanes) gave 1.24 g (82%)