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温度

0 °C

To a cooled (−78° C.) solution of 4-isopropoxy-3-(trifluoromethyl)benzoate (13.1 mmol) in DCM (85 mL) under nitrogen was added 2.0 M solution of LAH (19.0 mmol) by a syringe. The reaction was allowed to return to room temperature and stirred for 16 h. The reaction was cooled to 0° C. and quenched with water (0.95 mL) and 10% NaOH (aq) (1.90 mL). The mixture was filtered through Celite®. The filtrate was concentrated under vacuum to give the title compound as an oil (11.27 mmol). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.27 (d, J=6.06 Hz, 6H), 4.46 (d, J=5.81 Hz, 2H), 4.75 (septet, J=6.02 Hz, 1H), 5.20 (t, J=5.75 Hz, 1H), 7.23 (d, J=8.46 Hz, 1H), 7.47-7.56 (m, 2H).

1. customto return to room temperature
2. customquenched with water (0.95 mL) and 10% NaOH (aq) (1.90 mL)
3. filtrationThe mixture was filtered through Celite®
4. concentrationThe filtrate was concentrated under vacuum