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温度

0 °C

To a solution of 2-(1-tertbutoxycarbonylpiperidin-4-yl)benzonitrile (1.7 g, 5.9 mmol) in ethyl acetate (˜50 ml), cooled to 0° C. was added hydrogen chloride gas, bubbled vigorously for 5 minutes. The reaction mixture was stirred for 10 minutes at 0° C., purged with argon and concentrated. Flushing with ethyl acetate×3 and concentration gave 2-(piperidin-4-yl)benzonitrile hydrochloride; 1H NMR (DMSO) d 1.98 (m, 4H), 3.07 (m, 2H), 3.21 (tt, 1H, J=12 Hz, J=3.8 Hz), 3.36 (m, 2H), 7.46 (m, 2H), 7.74 (bt, 1H, J=7.7 Hz), 7.83 (bd, 1H, J=7.0 Hz), 9.10 (bd, 2H).

1. custombubbled vigorously for 5 minutes
2. custompurged with argon
3. concentrationconcentrated
4. customFlushing with ethyl acetate×3 and concentration