反应详情

1-(2-Furyl)-2-methyl-3-butyn-1-ol (15 g, 0.1 mole) was dissolved in a 2:1 mixture (150 ml) of acetone and water in a reactor, and p-toluenesulfonic acid (3 g) was dried. Thereafter, reaction was carried out at 50° to 60° C. for about 48 hours with stirring. After completion of the reaction, the reaction solution was cooled and neutralized with addition of a saturated aqueous solution (30 ml) of sodium hydrogen carbonate, followed by extraction with a solvent. The extrect was washed with water, dried and concentrated. The residue obtained was distilled under reduced pressure to obtain 7.8 g (yield, 52%) of pure (±)-3-hydroxy-2-(1-methyl-2-propynyl)-4-cyclopenten-1-one having a boiling point of 110°-115° C./3 mmHg.

1. dry with materialp-toluenesulfonic acid (3 g) was dried
2. customThereafter, reaction
3. customAfter completion of the reaction
4. temperaturethe reaction solution was cooled
5. extractionfollowed by extraction with a solvent
6. washThe extrect was washed with water
7. customdried
8. concentrationconcentrated
9. customThe residue obtained
10. distillationwas distilled under reduced pressure