反应详情

308 g. of α-resorcylic acid were dissolved in 1000 ml of absolute ethanol and 25 ml of concentrated sulphuric acid were added. The reaction mixture was boiled under reflux for 20 hours. The ethanol was evaporated and the residue poured into water and extracted with ether. The etheral phase was washed with sodium bicarbonate solution and water and dried with magnesium sulphate. When the ether was evaporated, a crystallizing residue was obtained.

1. temperatureunder reflux for 20 hours
2. customThe ethanol was evaporated
3. additionthe residue poured into water
4. extractionextracted with ether
5. washThe etheral phase was washed with sodium bicarbonate solution and water
6. dry with materialdried with magnesium sulphate
7. customWhen the ether was evaporated
8. customa crystallizing residue was obtained