反应详情

Preparation 3A was prepared from (4S)-4-(propan-2-yl)-1,3-oxazolidin-2-one (4.66 g, 36.1 mmol) and 4,4,4-trifluorobutanoic acid (5.02 g, 35.3 mmol) by the general methods shown for Preparation 1B. Preparation 3A was obtained as a colorless oil (3.64 g, 40%). 1H NMR (400 MHz, CDCl3) δ ppm 4.44 (1H, ddd, J=8.41, 3.51, 3.39 Hz), 4.31 (1H, t, J=8.66 Hz), 4.25 (1H, dd, J=9.03, 3.26 Hz), 3.13-3.32 (2H, m), 2.47-2.59 (2H, m), 2.38 (1H, dddd, J=13.96, 7.01, 3.89 Hz), 0.93 (3H, d, J=7.28 Hz), 0.88 (3H, d, J=6.78 Hz).