反应详情

温度

70 °C

The solution of 2.80 g of ethyl 4-(2-methoxycarbonylvinyl)-3-nitrobenzoic acid in 20 ml of glacial acetic acid is hydrogenated in the presence of 0.288 g of 10% Pd/C at room temperature over 16 hours. The reaction mixture is stirred at 70° C. over 1 hour and subsequently concentrated by evaporation to dryness. The residue is admixed with 250 ml of 1M sodium hydrogencarbonate and extracted with ethyl acetate (2×250 ml). The organic phases are washed with water (250 ml), dried over sodium sulphate, filtered and concentrated by evaporation. The title compound is obtained as a white solid from the residue by means of crystallization (ethyl acetate-hexane). Rf=0.24 (1:1 EtOAc-heptane).

1. concentrationsubsequently concentrated by evaporation to dryness
2. extractionextracted with ethyl acetate (2×250 ml)
3. washThe organic phases are washed with water (250 ml)
4. dry with materialdried over sodium sulphate
5. filtrationfiltered
6. concentrationconcentrated by evaporation