反应详情

To a solution of ca. 20 g (contains 15.65 g, 58.9 mmol) (2-methoxy-ethyl)-(2-methoxy-6-nitro-phenyl)-amine in 150 ml glacial acetic acid, 3.0 ml (58.9 mmol) bromine is slowly added at room temperature. The reaction mixture is stirred at room temperature for 3 h. 600 ml EtOAc are added and this solution is washed with 4n NaOH (2×), water and brine, dried over MgSO4, filtered and concentrated in vacuo. The residue is recrystallized from diethyl ether/hexane to afford 13 g of the pure title compound as orange crystals and 6.6 g of an orange oil which contained 50% of the starting material.

1. washthis solution is washed with 4n NaOH (2×), water and brine
2. dry with materialdried over MgSO4
3. filtrationfiltered
4. concentrationconcentrated in vacuo
5. customThe residue is recrystallized from diethyl ether/hexane