反应详情

As shown in step 4-ii of Scheme 4, to a solution of 2-(2-methoxyphenyl)propanoic acid (1.50 g, 7.91 mmol) in THF (20 mL) at 0° C. was added lithium aluminum hydride (31.6 mL of 0.5 M solution, 15.8 mmol) and the reaction was warmed to room temperature and stirred for 3.5 hours. After the sequential addition of 0.7 mL water, 0.7 mL 1M NaOH, 1.9 mL water, and MgSO4 to sequester the water, the reaction mixture was filtered through diatomaceous earth and concentrated under reduced pressure to give 2-(2-methoxyphenyl)-1-propanol as a clear, colorless liquid (Compound 2009, 1.41 g, 96% yield): 1H NMR (CDCl3) δ 7.27-7.20 (m, 2H), 7.03-6.87 (m, 2H), 3.85 (s, 3H), 3.67 (m, 2H), 3.54-3.42 (m, 1H), 1.54 (t, J=6.1 Hz, 1H), 1.29 (d, J=7.1 Hz, 3H).

1. filtrationthe reaction mixture was filtered through diatomaceous earth
2. concentrationconcentrated under reduced pressure