Formic Acid → N-(2-bromo-5-nitrophenyl)formamide
反応式
[Br:1][C:2]1[CH:8]=[CH:7][C:6]([N+:9]([O-:11])=[O:10])=[CH:5][C:3]=1[NH2:4].O.[CH:13](O)=[O:14]>>[CH:13]([NH:4][C:3]1[CH:5]=[C:6]([N+:9]([O-:11])=[O:10])[CH:7]=[CH:8][C:2]=1[Br:1])=[O:14]参加物
4
実験手順
A solution of 2-bromo-5-nitroaniline (5.27 g, 24.3 mmol) in 98% formic acid (30 ml) was heated to reflux for 90 min under nitrogen. The cooled reaction mixture was then poured into cold water (600 ml) which afforded a yellow precipitate. The solid was isolated by filtration and the cake washed with cold water (2×200 ml). Subsequent drying overnight under vacuum overnight afforded N-formyl-2-bromo-5-nitroaniline (5.84 g, 98%) as a yellow solid: 1H NMR (DMSO-d6) δ 10.14 (br s, 1H), 9.01 (d, J=2.4 Hz, 1H), 8.46 (s, 1H), 7.98 (d, J=8.8 Hz, 1H), 7.91 (dd, J=8.8, 2.5 Hz, 1H); 13C NMR (DMSO-d6) δ 161.2, 146.9, 136.6, 134.0, 120.6, 119.8, 116.7.