反应详情

A mixture of tyrosine methyl ester hydrochloride (4.8 g), 2-benzoylcyclohexanone (5.0 g), palladium on carbon (1.0 g, 10%), triethylamine (2.9 ml) and anisole (70 ml) was heated at reflux for 20 hours. The reaction mixture was filtered and the filtrate was partitioned between ethyl acetate and water. The extract was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was chromatographed on a silica gel column using hexane: ethyl acetate=3:1 as the eluant to afford the title compound (1.83 g, Rf=0.39: thin layer chromatography on a silica gel plate using hexane: ethyl acetate=3:1 as the eluant).

1. temperaturewas heated
2. temperatureat reflux for 20 hours
3. filtrationThe reaction mixture was filtered
4. customthe filtrate was partitioned between ethyl acetate and water
5. washThe extract was washed with saturated aqueous sodium chloride solution
6. dry with materialdried over anhydrous magnesium sulfate
7. concentrationconcentrated under reduced pressure
8. customThe residue was chromatographed on a silica gel column