The synthesis of the novel bis-spiroacetal (1)via the addition of an α-sulphonyl carbanion to δ-valerolactone followed by an acid catalysed cyclization is described. The stereochemistry was determined by X-ray crystallography and 1H NMR spectroscopy.
M. A. Brimble, C. J. Rush, G. M. Williams and E. N. Baker, J. Chem. Soc., Perkin Trans. 1, 1990, 414 DOI: 10.1039/P19900000414
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