反应详情

A stirred solution of 4,4,4-trifluoro-2-hydroxyimino-3-oxo-butyric acid ethyl ester (55 g, 0.258 mol) in ethanol (140 ml) was added with palladium on activated carbon and 4N hydrochloric acid (90 ml) accordingly. The reaction mixture was stirred in a Parr shaker under 0.3 MPa of hydrogen at room temperature for 2.5 hours. The reaction mixture was filtered, the filtrate was concentrated to give 2-amino-4,4,4-trifluoro-3-oxo-butyric acid ethyl ester hydrochloride (37.56 g, 61.8%) as a yellow solid.

1. filtrationThe reaction mixture was filtered
2. concentrationthe filtrate was concentrated