Sodium Bicarbonate → HCID 20430688, Verbindung

Reaktionsgleichung

[C:1]1([C:6]2([CH2:11][OH:12])[CH2:10][CH:9]=[CH:8]O2)[CH2:5][CH2:4][CH2:3][CH:2]=1.C(=O)([O-])[OH:14].[Na+]>CC(C)=O.O>[OH:14][CH:10]1[CH:9]=[CH:8][C:11](=[O:12])[CH:6]1[CH:1]1[CH2:5][CH2:4][CH:3]=[CH:2]1

Komponenten

Versuchsvorschrift

2-Cyclopentenyl-2-furyl methanol (131 g, 0.8 mole) was dissolved in a 2:1 mixture (1.5 liters) of acetone and water in a reactor, and polyphosphoric acid (20 g) was added thereto. Thereafter, reaction was carried out at 50° to 60° C. for about 24 hours with stirring. After completion of the reaction, the reaction solution was cooled and neutralized with addition of a saturated aqueous solution (200 ml) of sodium hydrogen carbonate, followed by extraction with a solvent. The extract was washed with water, dried and concentrated. The residue obtained was distilled under reduced pressure to obtain 72 g (yield, 55%) of pure (±)-3-hydroxy-2-(2-cyclopentenyl)-4-cyclopenten-1-one having a boiling point of 115°-120° C./3 mmHg.