Abstract
An alkyl, acetoxyl, or silyl enol ether of 3-(organosilyl)cyclohexanone was found to oxidize with molecular oxygen in toluene at 110 ℃ to give the corresponding conjugated enone up to 88% yild. The same type of reaction did not proceed by replacement of the silyl group at C-3 position with an isopropyl group. These results indicate that a silyl group can induce an ene-type reaction of enol ethers and acetates.