2-甲氧基-4,6-二甲基苯甲醛

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

实验步骤: Dimethylsulfate (16.4 g; 130 mmole) and potassium carbonate (20.7 g; 150 mmole) were added to a solution of 2,4-dimethyl-6-hydroxybenzaldehyde (20.0 g; 130 mmole) in acetone (200 ml). The mixture was heated under reflux with stirring for 48 hours and then evaporated to dryness. The residue was dissolved in dichloromethane and washed successively with water, aqueous sodium hydroxide (1M) and water, and then was dried over anhydrous sodium sulfate. The solvent was evaporated under reduced pressure to give 2,4-dimethyl-6-methoxybenzaldehyde (18.9 g; 89.0%). The product was obtained as a brown oil and was characterized by its proton magnetic resonance spectrum, the details of which are recorded in Table 2 below. The mixture was heated under reflux evaporated to dryness The residue was dissolved in dichloromethane washed successively with water, aqueous sodium hydroxide (1M) and water was dried over anhydrous sodium sulfate The solvent was evaporated under reduced pressure