Cl[C:2]1[C:3]([F:12])=[CH:4][C:5]([N+:9]([O-:11])=[O:10])=[C:6]([CH:8]=1)[NH2:7].CC(C)([O-])C.[K+].[OH:19][C:20]1[CH:27]=[CH:26][C:23]([CH:24]=[O:25])=[CH:22][CH:21]=1.O>CN(C)C=O>[NH2:7][C:6]1[C:5]([N+:9]([O-:11])=[O:10])=[CH:4][C:3]([F:12])=[C:2]([O:19][C:20]2[CH:27]=[CH:26][C:23]([CH:24]=[O:25])=[CH:22][CH:21]=2)[CH:8]=1A solution of 5-chloro-4-fluoro-2-nitroaniline (0.380 g, 1.99 mmol), potassium t-butoxide (0.269 g, 2.39 mmol), and 4-hydroxybenzaldehyde (0.292 g, 2.39 mmol) in dimethylformamide (5 mL) was heated to 80 degrees Centigrade for 6 hours and then cooled. Water was added and the organics extracted using ethyl acetate (2×50 mL). The combined organics were then washed one time in brine and then dried (Na2SO4), filtered and concentrated. Chromatography on silica gel using a gradient of 20%-30% ethyl acetate/hexanes eluted the product to give 0.468 g of 4-[(5-amino-2-fluoro-4-nitrophenyl)oxy]benzaldehyde as an orange solid.
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