4-(二氟甲氧基)-3,5-二甲基苯甲醛

反应条件: temp:120.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: To a mixture of 4-hydroxy-3,5-dimethylbenzaldehyde (2.00 g), N,N-dimethylformamide (54.0 mL) and water (6.00 mL), sodium chlorodifluoroacetate (6.09 g) and potassium carbonate (3.68 g) were added and the mixture was stirred at 120° C. for 4.5 hours. After cooling the reaction mixture to room temperature, water was added to it and two extractions were conducted with ethyl acetate. The combined organic layers were washed with water four times and thereafter washed with saturated brine. After drying over anhydrous magnesium sulfate, the desiccant was removed by filtration and the filtrate was then concentrated under reduced pressure. The resulting residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=97:3-88:12) to give the titled compound as a colorless solid (2.53 g). were added After cooling the reaction mixture to room temperature The combined organic layers were washed with water four times washed with saturated brine After drying over anhydrous magnesium sulfate the desiccant was removed by filtration the filtrate was then concentrated under reduced pressure The resulting residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=97:3-88:12)