2,3-Dimethylanisole → 2,2-Diethyl-4,5-dimethyl-6-methoxy-indan-1,3-dione

참여 물질

반응 조건

반응 단계

A stirred mixture of 2,3-dimethylanisole (6.8 g., 0.05 mole) and 2,2-diethylmalonyl chloride (10 g., 0.051 mole) in hexane (75ml.) is cooled to 0°C. and treated with aluminum chloride (13.5 g., 0.11 mole) in several portions over a 15 minute period. The reaction is heated at reflux for 2 hours, the hexane is distilled at reduced pressure, the product treated with cold 1N-hydrochloric acid, extracted into ether, washed with water, 5% sodium hydroxide, water then dried over magnesium sulfate. Evaporation of the ether at reduced pressure affords 6.3 g. of 2,2-diethyl-4,5-dimethyl-6-methoxy-indan-1,3-dione which melts at 80°-81°C. after recrystallization from petroleum ether.

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