The sulphonium αα′-dicarbonylmethylides (I) were acylated at the β-position in the presence of n-butyl-lithium or lithium di-isopropylamide. These acylated sulphonium ylides underwent thermal elimination of dimethyl sulphide to give alkyl- and aryl-substituted furan-3(2H)-ones (3-hydroxyfurans). The mechanism of furanone formation is discussed.
M. Yamamoto, J. Chem. Soc., Perkin Trans. 1, 1976, 1688 DOI: 10.1039/P19760001688
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