反应详情

Add a solution of methyl 3-methylbenzo[b]thiophen-2-carboxylate (5.00 g, 24.2 mmol) in THF (25 mL) dropwise to a 1M solution of lithium aluminum hydride in THF (121 mL, 121 mmol) at 0° C. Stir 1 hour. Add an excess of sodium sulfate decahydrate portionwise (slowly at first), stir for 30 minutes at 0° C., then 2 hours at room temperature. Filter, and wash the cake with THF. Concentrate the combined filtrates to afford the drawn product as a white solid (3.60 g, 83%): 1H NMR (CDCl3) δ 7.81 (m, 1H), 7.68 (m, 1H), 7.35 (m, 2H), 4.92 (d, 2H), 2.40 (s, 3H), 1.77 (t, 1H).

1. stirringstir for 30 minutes at 0° C.
2. custom2 hours
3. customat room temperature
4. filtrationFilter
5. washwash the cake with THF
6. concentrationConcentrate the combined filtrates