Acetic Acid → Ethyl 3-(2-aminophenyl)-2-methyl-2-propenate

Beteiligte Stoffe

Reaktionsschritte

Into 160 ml of acetic acid, 10 g (42.5 mmol) of (E) ethyl 2-methyl-3-(2-nitrophenyl)-2-propenate were dissolved. While the solution was stirred, 10.9 g (195.2 mmol) of iron powder (Koso Chem. Co.) and 12 ml of distilled water were added thereto at room temperature; and temperature was raised, so that reflux was carried out for 1 hour at 100° C. After the end point of the reaction was verified by TLC, the reaction liquid was cooled, and acetic acid was evaporated under a reduced pressure. Ethyl acetate was added to the residue, and insoluble matters were filtered out. Thus obtained filtrate was successively washed with water and a saturated aqueous sodium hydrogencarbonate solution. The washed solution was dried for one night with sodium sulfate being added thereto. After sodium sulfate anhydride was filtered out, the filtrate was concentrated under a reduced pressure. The resulting oily product was refined by a silica gel column chromatography (silica gel; developing solvent: ethyl acetate/hexane=1/3), whereby 6.4 g of the aimed compound were obtained as an oily product (yield: 71.5%).

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