Synthesis
There are several different synthetic routes for the production of cyclohexenone. The reduction and acid hydrolysis of 3-ethoxy-2-cyclohexen-1-one is available for the laboratory scale. The precursor is accessible from resorcinol via 1,3-cyclohexanedione.
Anisole is also available. Cyclohexanone is obtained by Birch reduction followed by acid hydrolysis.
It can be obtained from cyclohexanone by α-bromination and elimination, or from 3-chloro cyclohexene by means of hydrolysis and oxidation.
Technically, 2-cyclohexen-1-one is produced by catalytic oxidation of cyclohexene, for example with hydrogen peroxide and vanadium catalysts. There are several patented process variants with different oxidizing agents or catalysts.
Read more about this topic: Cyclohexenone
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