反应详情

23.9 g (0.1 mol) of dimethyl 2-nitroterephthalate are hydrogenated in a mixture of 100 ml of methanol and 200 ml of tetrahydrofuran with palladium/charcoal at 5 bar and 20° C. After the catalyst has been removed by suction filtering the solvent is evaporated off and the residue is recrystallised from methanol. Yield 18-19 g, yellowish crystals m.p. 130-131° C.

1. customAfter the catalyst has been removed by suction
2. filtrationfiltering the solvent
3. customis evaporated off
4. customthe residue is recrystallised from methanol