Acetic Anhydride → HCID 178434282, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

526 mg (10.5 mmol) of hydrazine hydrate and 1 ml of glacial acetic acid are added to 800 mg (5.26 mmol) of 2,6-dihydroxyacetophenone. After 15 minutes of stirring at 110° C., the reaction mixture is cooled to room temperature. After addition of 6 ml of polyphosphoric acid, the mixture is heated at 120° C. for 20 min. After cooling to room temperature, 0.8 g (7.89 mmol) of acetic anhydride is added dropwise. The mixture is once more heated at 120° C. for 20 min. The reaction mixture, cooled to room temperature, is then poured onto ice. The mixture is neutralized using 1N sodium hydroxide solution and extracted three times with ethyl acetate. The combined organic phases are washed twice with water. After drying over sodium sulfate, the solvent is removed under reduced pressure. The product is purified by column chromatography. The mobile phase used is a mixture of cyclohexane and ethyl acetate (1:1).

Herkunft & Nachweise