反应详情

A suspension of 5-acetyl-2-acetylamino-4-trifluoromethyl-benzoic acid methyl ester (1.0 g, 3.3 mmol) and 100 mg of palladium on carbon (10%) in THF (10 mL) was stirred at r.t. for 2 h under hydrogen (5 bars). The mixture was then filtered and concentrated in vacuo. The crude product was purified by column chromatography (silica gel 60, hexanes/EtOAc 2:1) to give 2-acetylamino-5-(1-hydroxy-ethyl)-4-trifluoromethyl-benzoic acid methyl ester (917 mg, 3.0 mmol, 91%) as a white solid, m.p. 120-122° C., ESI-MS: m/z 306 [M+H]+.

1. filtrationThe mixture was then filtered
2. concentrationconcentrated in vacuo
3. customThe crude product was purified by column chromatography (silica gel 60, hexanes/EtOAc 2:1)