[N+:1]([C:4]1[CH:10]=[CH:9][CH:8]=[C:7]([N+:11]([O-:13])=[O:12])[C:5]=1[NH2:6])([O-:3])=[O:2].[Br:14]Br.O>C(O)(=O)C>[Br:14][C:9]1[CH:10]=[C:4]([N+:1]([O-:3])=[O:2])[C:5]([NH2:6])=[C:7]([N+:11]([O-:13])=[O:12])[CH:8]=1A stirred suspension of 2,6-dinitroaniline (5 g, 27.3 mmol) in glacial acetic acid (50 mL) was added bromine (1.5 mL, 30 mmol) dropwise and heated at 120° C. for 2 h. After cooling to ambient temperature, the resultant mixture was poured into water (50 mL). The precipitate solid was collected by filtration and washed with water then dried in-vacuo. The solid was re-dissolved in EtOAC, washed with water and saturated brine. The organic layer was collected and concentrated in-vacuo to give the desired product (6.88 g, 95%). 1H NMR (300 MHz, DMSO-d6) δ ppm 8.37 (br s, 2H), 8.58 (s, 2H).
Wird geladen…
