Reaktion #96297

Reaktionsgleichung

4-hydroxy-4-methyl-5-allyl-2-cyclopentenone

water

sodium chloride

→

2-allyl-3-methyl-4-hydroxy-2-cyclopentenone

Reaktionsbedingungen

Aufarbeitung

1. 1
   TemperaturAfter cooling
2. 2
   Extraktionthe resulting mixture was extracted with methyl isobutyl ketone
3. 3
   EinengenThe extract was concentrated under reduced pressure

Vorschrift

In an autoclave, 4-hydroxy-4-methyl-5-allyl-2-cyclopentenone (20 g) and water (400 ml) were charged, and the resultant mixture was stirred at 180° C. for 6 hours in a nitrogen atmosphere. After cooling, sodium chloride (50 g) was added to the reaction mixture, and the resulting mixture was extracted with methyl isobutyl ketone. The extract was concentrated under reduced pressure to give 2-allyl-3-methyl-4-hydroxy-2-cyclopentenone (19 g). Yield, 95%. M.P. 130°-132° C./1.2 mmHg.

Quelle