Reaktion #1552040

Reaktionsgleichung

sebacic acid

hydroquinone

p-toluenesulfonic acid

→

sebacic acid divinyl ester

Lösungsmittel

vinyl acetate

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Temperaturthe reaction mixture was refluxed for 4 hours
2. 2
   Extraktionextracted with 150 ml 2N NaOH
3. 3
   TrocknenThe organic phase was dried over Na2SO4
4. 4
   Sonstigethe volatile components were removed on a rotary evaporator
5. 5
   SonstigePurification by flash column chromatography on silica gel (PE:EE=10:1)
6. 6
   Sonstigeyielded 8.9 g (47% of th.) of a colorless liquid

Vorschrift

15 g (74.2 mmol) of sebacic acid, 0.66 g (2.06 mmol) of mercury(II)acetate, and 0.12 g of hydroquinone were precharged in 75 ml of vinyl acetate into a 250 ml three-necked flask and stirred for 20 minutes under argon. Then, 0.09 g (0.01 mol) of p-toluenesulfonic acid were added as a catalyst, and the reaction mixture was refluxed for 4 hours. After cooling down to room temperature, the obtained solution was diluted with 200 ml ethyl acetate and extracted with 150 ml 2N NaOH. The organic phase was dried over Na2SO4, and the volatile components were removed on a rotary evaporator. Purification by flash column chromatography on silica gel (PE:EE=10:1) yielded 8.9 g (47% of th.) of a colorless liquid.

Quelle