反应详情

Into a four necked flask equipped with an agitator and a thermometer, 3-acetoxy-2-allyl-3-methyl-4-cyclopentenone (19.4 g), acetic acid (80 ml) and sodium acetate (4 g) were charged and refluxed for 5 hours with agitation. After the completion of the reaction, acetic acid was evaporated off under reduced pressure. The residue was shaken with toluene (70 ml) and water (40 ml). The organic layer was separated, washed with an aqueous solution of sodium bicarbonate and then water and concentrated. The residue was distilled to obtain 4-acetoxy-2-allyl-3-methyl-2-cyclopentenone (16.7 g). Yield, 86%. B.P., 100°-110° C./0.1-0.3 mmHg.

1. customInto a four necked flask equipped with an agitator
2. temperaturerefluxed for 5 hours with agitation
3. customwas evaporated off under reduced pressure
4. customThe organic layer was separated
5. washwashed with an aqueous solution of sodium bicarbonate
6. concentrationwater and concentrated
7. distillationThe residue was distilled