1-Chloro-4,5-difluoro-2-nitrobenzene → 1-Chloro-4-fluoro-5-methoxy-2-nitrobenzene
反応式
[CH3:1][O-:2].[Na+].[Cl:4][C:5]1[CH:10]=[C:9](F)[C:8]([F:12])=[CH:7][C:6]=1[N+:13]([O-:15])=[O:14]>CO>[Cl:4][C:5]1[CH:10]=[C:9]([O:2][CH3:1])[C:8]([F:12])=[CH:7][C:6]=1[N+:13]([O-:15])=[O:14]参加物
4
実験手順
To sodium methoxide (100 mL of a 0.5 M solution in methanol, 50.1 mmol) cooled to 0° C. was added a solution of 1-chloro-4,5-difluoro-2-nitro-benzene (9.7 g, 50.1 mmol) in methanol (10 mL) dropwise over 15 min. The solution was warmed to room temperature and stirred for 2 h, then poured slowly over ice. The yellow precipitate was collected by filtration and washed with cold water. The crystals were air dried to give 8.2 g (79%) of 1-chloro-4-fluoro-5-methoxy-2-nitro-benzene: Crude 1H NMR (400 MHz, CDCl3): δ 7.85 (d, J=10.5 Hz, 1H), 7.06 (d, J=7.3 Hz, 1H), 3.98 (s, 3H). The crude material was pure enough to carry on to the next step.