[C:1](=O)([O-])[O-].[K+].[K+].CI.[Br:9][C:10]1[CH:15]=[C:14]([N+:16]([O-:18])=[O:17])[C:13]([OH:19])=[C:12]([C:20]([CH3:23])([CH3:22])[CH3:21])[CH:11]=1.CCOCC>CN(C)C=O>[CH3:1][O:19][C:13]1[C:14]([N+:16]([O-:18])=[O:17])=[CH:15][C:10]([Br:9])=[CH:11][C:12]=1[C:20]([CH3:23])([CH3:22])[CH3:21]Potassium carbonate (453 g) and methyl iodide (164 ml) were added to a solution of 4-bromo-2-(tert-butyl)-6-nitrophenol (600 g) in dimethylformamide (6000 ml) and the mixture was stirred at 50° C. for 4 hours. Ether (6000 ml) was added and the reaction mixture was washed 3 times with water. The organic layer was dried over anhydrous magnesium sulfate and the solvent was distilled off under reduced pressure to yield a crude product of the title compound (569 g) as a yellow oil.
Wird geladen…