反应详情

A mixture of crude 2-(4-nitro-phenyl)-malonic acid diethyl ester and 10% palladium on carbon in ethyl acetate (20 ml) was treated with hydrogen gas (40 psi) on a Parr shaker for 2 hours. The mixture was filtered and the filtrate was concentrated under reduced pressure. The residue was purified by flash chromatography on silica gel eluting with 25% ethyl acetate-hexane to provide 2-(4-amino-phenyl)-malonic acid diethyl ester (450 mg, 90% yield for 2 steps).

1. filtrationThe mixture was filtered
2. concentrationthe filtrate was concentrated under reduced pressure
3. customThe residue was purified by flash chromatography on silica gel eluting with 25% ethyl acetate-hexane