Reaktion #95964

Reaktionsgleichung

Cyclohexane-1,4-dione

benzylidenetriphenylphosphorane

→

4-Benzylcyclohexanone

4-benzylidenecyclohexanone

Reaktionsbedingungen

Vorschrift

4-Benzylcyclohexanone is prepared as follows. Cyclohexane-1,4-dione, ethylene monoketal is reacted with benzylidenetriphenylphosphorane to afford 4-benzylidenecyclohexanone, ethylene ketal, which is catalytically hydrogenated, e.g., using palladium on carbon, to give 4-benzylcyclohexanone, ethylene ketal. Deketalization with mineral acid, e.g., hydrochloric acid in acetone solution, provides 4-benzylcyclohexanone.

Quelle