反应详情

In the same apparatus as in Example 1, 2-allyl-3-hydroxy-3-methyl-4-cyclopentenone (15.2 g), propionic acid (60 ml) and sodium propionate (3 g) were charged and heated at 120° to 130° C. for 8 hours with agitation. After the completion of the reaction, propionic acid was evaporated off under reduced pressure. The residue was extracted with toluene (60 ml) and water (40 ml) and treated as in Example 1 to obtain 2-allyl-4-propionyloxy-3-methyl-2-cyclopentenone (19.7 g). Yield, 94.7%. B.P., 115°-120° C./0.1-0.2 mmHg.

1. temperatureheated at 120° to 130° C. for 8 hours with agitation
2. customwas evaporated off under reduced pressure
3. extractionThe residue was extracted with toluene (60 ml) and water (40 ml)
4. additiontreated as in Example 1