Water → 3-Formylbut-2-enyl acetate

Beteiligte Stoffe

Reaktionsschritte

To a solution of 4-acetoxy-2-methyl-2-buten-1-ol (6.69 g, 46.4 mmol) in dimethylformamide (40 ml) were added 2,2,6,6-tetramethyl-piperidine-1-oxy (0.39 g, 2.32 mmol, 5 mol %) and cuprous chloride (0.48 g, 4.64 mmol, 10 mol %). The mixture was subjected to reaction at 40° C. for 8 hours while bubbling oxygen at a rate of about 100 ml/min. After completion of the reaction, the reaction mixture was poured into ice-cooled water (30 ml) and extracted with ether (100 ml) three times. The extract was dried over anhydrous magnesium sulfate. Evaporation of the ether followed by purification by column chromatography (ethyl acetate-hexane (=1:3)) gave 4-acetoxy-2-methyl-2-buten-1-al (6.02 g, 42.3 mmol; Yield: 91.2%).

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