Reduction of the 4-hydroperoxy-azetidin-2-one (4) at –50 °C gave the 4-hydroxy-azetidin-2-one (6) which was converted into the corresponding trifluoroacetate (7); the 4-hydroxy-azetidin-2-ones, which were not isolated, were unstable at room temperature, and appeared to be unpromising as intermediates for 1-oxacephem synthesis.
S. Kamata, S. Yamamoto, N. Haga and W. Nagata, J. Chem. Soc., Chem. Commun., 1979, 1106 DOI: 10.1039/C39790001106
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