反应详情

To a cooled (0° C.) solution of 3-amino-1-(3-bromophenyl)propan-1-ol (24) (40 g, 173.8 mmol) in MTBE (250 mL) was added ethyl trifluoroacetate (28 mL, 234.7 mmol) over 7 min and the reaction mixture was stirred at room temperature for 50 min Concentration under reduced pressure gave trifluoroacetamide 25 as a colorless oil. Yield (55.35 g, 98%): 1H NMR (400 MHz, DMSO-d6) δ 9.33 (s, 1H), 7.51 (t, J=2.0 Hz, 1H), 7.41 (dt, J=7.6, 2.0 Hz, 1H), 7.25-7.32 (m, 2H), 5.46 (d, J=6.4 Hz, 1H), 4.55-4.60 (m, 1H), 3.20-3.23 (m, 2H), 1.75-1.82 (m, 2H).

1. concentrationConcentration under reduced pressure