反应详情

Zinc amalgam (prepared by mixing zinc dust (25.0 g), mercuric chloride (2.5 g), concentrated hydrochloric acid (3 ml) and water (50 ml) together for 5 minutes, then decanting the aqueous solution) was added to a mixture of 4,7-dimethylindan-1-one (25.0 g, 156 mmole), acetic acid (50 ml), water (50 ml) and concentrated hydrochloric acid (100 ml). The mixture was refluxed with vigorous stirring for 12 hours, then cooled, poured into water and extracted with diethyl ether. The ether extract was washed successively with water, dilute aqueous sodium bicarbonate solution and water. Then dried over anhydrous sodium sulfate and concentrated. Purification by column chromatography over silica gel (eluant hexane) gave 4,7-dimethylindane (18.5 g, 81.4%) as an oil.

1. customdecanting the aqueous solution)
2. temperatureThe mixture was refluxed
3. temperaturecooled
4. extractionextracted with diethyl ether
5. extractionThe ether extract
6. washwas washed successively with water, dilute aqueous sodium bicarbonate solution and water
7. dry with materialThen dried over anhydrous sodium sulfate
8. concentrationconcentrated
9. customPurification by column chromatography over silica gel (eluant hexane)