反应详情

A 5.0 g. sample of 1,4-dihydro-1-(3-butenyl)anthraquinone (6a, R = H) was dissolved in 100 ml. of ethyl acetate. The solution was then hydrogenated using 0.2 g. 10% Pd/C catalyst. After the absorption of three equivalents of hydrogen, the mixture was filtered to remove the catalyst. It was then stirred at room temperature overnight while exposed to air to oxidize the hydroquinone. After removal of the solvent, the residue was recrystallized from methanol to give 4.2 g. product (83% yield). The gas chromatographic retention time, infrared spectrum, and nmr spectrum of this sample were identical with those of an authentic sample.

1. filtrationthe mixture was filtered
2. customto remove the catalyst
3. customAfter removal of the solvent
4. customthe residue was recrystallized from methanol
5. customto give 4.2 g