反应详情

A solution of 30 g of the nitrobenzoic acid methyl ester obtained according to (b) in 500 ml of dioxane is hydrogenated catalytically in the presence of Raney nickel. After completion of the absorption of hydrogen, the whole is filtered and the filtrate is concentrated. The residue yields, on recrystallization from methanol, the desired compound in the form of colourless crystals melting at 153°-156° C. in a very good yield.

1. customAfter completion of the absorption of hydrogen
2. filtrationthe whole is filtered
3. concentrationthe filtrate is concentrated
4. customThe residue yields, on recrystallization from methanol