反应详情

In an hydrogenating autoclave, there are placed 144 g of methyl 3,4-dimethoxy-6-nitro-benzoate, 300 ml of tetrahydrofuran and 3 coffee spoonfuls of Raney nickel. Hydrogenation occurs at about 35°C. In 20 minutes, the pressure drop is 80 kg. It is cooled, the nickel filtered, and the tetrahydrofuran removed under vacuum. There are obtained 123 g (97%) of methyl 3,4-dimethoxy-6-aminobenzoate. (m.p.: 130°C).

1. customoccurs at about 35°C
2. temperatureIt is cooled
3. filtrationthe nickel filtered
4. customthe tetrahydrofuran removed under vacuum