Pyridine → 5,5-Dimethyl-3-oxocyclohex-1-en-1-yl acetate

Reaktionsgleichung

[C:1](Cl)(=[O:3])[CH3:2].[CH3:5][C:6]1([CH3:14])[CH2:11][C:10](=[O:12])[CH2:9][C:8](=[O:13])[CH2:7]1.N1C=CC=CC=1>C(Cl)(Cl)Cl>[C:1]([O:12][C:10]1[CH2:11][C:6]([CH3:14])([CH3:5])[CH2:7][C:8](=[O:13])[CH:9]=1)(=[O:3])[CH3:2]

Komponenten

Versuchsvorschrift

Acetyl chloride (1.1 ml, 15.65 mmol) was added to a stirred solution of 5,5-dimethyl-cyclohexane-1,3-dione (2.1 g, 14.23 mmol) and pyridine (1.14 ml), in chloroform (50 ml). The mixture was stirred at room temperature for about 1.5 hours, then washed with water, 0.1N HCl, saturated aqueous sodium hydrogen carbonate and water. The organic phase was dried over sodium sulfate and evaporated to dryness to give 2.5 g (96%) of the title compound as a colourless oil, which was used as such without any further purification.