Reaction of silyl enol ethers (1) with α-acyl-α-chloro-sulphides (2; n= 0) gives furans (4), whereas with β- or γ-acyl-α-chloro-sulphides (2; n= 1 or 2) diketones (3) are obtained.
R. Tanikaga, K. Miyashita, H. Sugihara and A. Kaji, J. Chem. Soc., Chem. Commun., 1981, 1106 DOI: 10.1039/C39810001106
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