反应详情

A solution of 3.466 g of 8-oxo-5,6,7,8-tetrahydronaphthalene-1-carboxylic acid in 30 ml of methanol is admixed with 1.850 ml of conc. H2SO4 and the reaction solution is subsequently heated to reflux over 18 hours. The reaction solution is subsequently cooled and poured onto 200 ml of saturated aqueous sodium hydrogencarbonate solution and extracted with 2×200 ml of ethyl acetate. The combined organic phases are washed with 150 ml of saturated aqueous sodium hydrogencarbonate solution and 150 ml of water, dried over sodium sulphate and concentrated. The crude product is obtained as a brown oil and is used without further purification. Rt=3.42

1. temperaturethe reaction solution is subsequently heated
2. temperatureto reflux over 18 hours
3. temperatureThe reaction solution is subsequently cooled
4. extractionextracted with 2×200 ml of ethyl acetate
5. washThe combined organic phases are washed with 150 ml of saturated aqueous sodium hydrogencarbonate solution and 150 ml of water
6. dry with materialdried over sodium sulphate
7. concentrationconcentrated