Tetrafluoroborate → 2-Fluoro-1-methoxy-4-(trifluoromethyl)benzene
反応式
N[C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[O:12][CH3:13].[B-](F)(F)(F)[F:15]>>[F:15][C:2]1[CH:7]=[C:6]([C:8]([F:11])([F:10])[F:9])[CH:5]=[CH:4][C:3]=1[O:12][CH3:13]参加物
3
実験手順
The 2-amino-4-trifluoromethylphenols (XI) required for the reaction sequence just described may be prepared by conventional methods. Thus, 2-amino-6-fluoro-4-trifluoromethylphenol may be prepared from 2-nitro-4-trifluoromethylchlorobenzene by reacting the latter with sodium methoxide to give 2-nitro-4-trifluoromethylanisole, and reducing this compound to 2-amino-4-trifluoromethylanisole. The latter compound may be diazotised and converted to its fluoborate salt and heated to give 2-fluoro-4-trifluoromethylanisole. This may then be nitrated to form 2-fluoro-6-nitro-4-trifluoromethylanisole, which is then reduced to give 2-amino-6-fluoro-4-trifluoromethylanisole. Finally the latter compound is heated with a demethylating agent, for example an excess of pyridine hydrochloride to give 2-amino-6-fluoro-4-trifluoromethylphenol.
後処理
- temperature