反应详情

To a suspension of LiAlH4 (1.91 g, 50.4 mmol) in anhydrous ether (50 mL) was added dropwise a solution of 8 (11.5 g, 50.4 mmol) in ether (50 mL) over 30 minutes at 0° C. under argon and then the mixture was stirred at room temperature (overnight). The reaction mixture was cooled to 0° C. and quenched by slow (30 minutes addition of H2O (7.2 mL, 0.4 mol), then the mixture was stirred at 0° C. (1 h). Solid was removed by filtration washed with ether, then the combined ether solution was dried (Na2SO4) and taken to dryness, yielding 9 as an oil70 (9.36 g, 100%). 1H NMR (CDCl3) δ 8.08 (1H, dd, J=2.4, 7.4 Hz), 7.88 (1H, m), 7.74 (1H, d, J=7.6 Hz), 7.34˜7.57 (4H, m), 3.76 (2H, t, J=6.4 Hz), 3.20 (2H, t, J=7.5 Hz), 2.05 (2H, m), 1.75 (1H, brs).

1. temperatureThe reaction mixture was cooled to 0° C.
2. customquenched by slow (
3. stirringthe mixture was stirred at 0° C. (1 h)
4. customSolid was removed by filtration
5. washwashed with ether
6. dry with materialthe combined ether solution was dried (Na2SO4)
7. customyielding 9 as an oil70 (9.36 g, 100%)