Ethylene → 6-Ethoxy-2-tetralone

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

39.1 g (0.20 mol) of 4-ethoxyphenylacetyl chloride in 200 ml of dichloromethane were added dropwise in the course of 1 hour at −78° C. to 53.4 g (0.4 mol) of aluminum chloride in 800 ml of dichloromethane. A vigorous stream of ethylene was subsequently passed in in the course of 15 minutes, and the mixture was allowed to come to room temperature and stirred for a further 3 hours. The dark red solution was cooled to 0° C. and carefully treated with 300 ml of ice-water. After phase separation, the organic phase was washed with 2N HCl (3×) and saturated sodium hydrogen carbonate solution, dried and evaporated on a rotary evaporator. After purification by column chromatography with petroleum ether/ethyl acetate (9:1, 8:2), 20.9 g (56% of theory) of a yellow syrup were obtained.

Herkunft & Nachweise