(S)-4-Benzyl-2-oxazolidinone → (4S)-4-benzyl-3-(5,5,5-trifluoropentanoyl)-1,3-oxazolidin-2-one

Participants

Reaction Steps

Intermediate S-1G was prepared from 5,5,5-trifluoropentanoic acid (3.35 g, 21.46 mmol) and (4S)-4-benzyl-1,3-oxazolidin-2-one (3.80 g, 21.46 mmol) by the general method shown for Intermediate S-1B. Intermediate S-1G (5.67 g, 84%) was obtained as a colorless viscous oil: 1H NMR (400 MHz, CDCl3) δ ppm 7.32-7.39 (2H, m), 7.30 (1H, d, J=7.05 Hz), 7.18-7.25 (2H, m), 4.64-4.74 (1H, m), 4.17-4.27 (2H, m), 3.31 (1H, dd, J=13.35, 3.27 Hz), 3.00-3.11 (2H, m), 2.79 (1H, dd, J=13.35, 9.57 Hz), 2.16-2.28 (2H, m), 1.93-2.04 (2H, m).

Provenance & Evidence