In the presence of a catalytic amount of nickel(II) complex, silyl enol ethers and silyl ketene acetals are smoothly oxygenated by the combined use of molecular oxygen and aldehyde to afford α-siloxy carbonyl compounds via possible intermediates, siloxy epoxides. And on treatment of the α-siloxy carbonyl compounds with potassium fluoride α-hydroxy carbonyl compounds are obtained in good to high yields.
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Takai et al. (1991) studied this question.
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