反应详情

(S)-2-Ethoxy-3-{4-[2-(5-methyl-2-phenyl-oxazol-4-yl)-acetoxy]-phenyl}-propionic acid benzyl ester (0.1 g, 0.2 mmol) was dissolved in EtOAc (4 mL) and 10% Pd/C (0.04 g, 0.037 mmol) was added. After evacuation the reaction vessel was connected to a hydrogen line and the hydrogeneation was performed at atmospheric pressure at room temperature for 3 h. The catalyst was filtered off, washed with EtOAc and the combined organic filtrates were evaporated under reduced pressure to afford the product as a solid (0.079 g, 96.4%). 1H NMR (400 MHz, CDCl3): δ 7.98-7.99 (d, 2H), 7.42 (m, 3H), 7.23-7.25 (d, 2H), 7.02-7.04 (m, 2H), 6.71 (br s, 1H), 4.01-4.02 (m, 1H), 3.80 (s, 2H), 3.57-3.60 (m, 1H), 3.36-3.39 (m, 1H), 3.07-3.10 (m, 1H), 2.94-2.99 (m, 1H), 2.40 (s, 3H), 1.11-1.14 (t, 3H).

1. filtrationThe catalyst was filtered off
2. washwashed with EtOAc
3. customthe combined organic filtrates were evaporated under reduced pressure