A range of 2-substituted oxepanes 3 has been prepared from δ-lactones via rhodium(II) acetate catalysed cyclisation of the intermediate diazo alcohols 2. The phenylsulphonyloxepane 3e and the oxepane phosphonate 3f are versatile substrates for further elaboration, and are readily converted into substituted oxepanes 12–14.
M. J. Davies, C. J. Moody and R. J. Taylor, J. Chem. Soc., Perkin Trans. 1, 1991, 1 DOI: 10.1039/P19910000001
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