Deacetoxycephalosporanate (S)-1-oxide 2-anions afforded (a) the Michael adducts with acrylonitrile, (b) Pummerer reactions with alkoxychloroformates, and (c) diazo-exchange reactions with tosyl azide, whereas the (R)-oxide under similar conditions reacted only with acrylonitrile giving a Michael adduct at C-4.
D. H. Bremner and M. M. Campbell, J. Chem. Soc., Chem. Commun., 1976, 538 DOI: 10.1039/C39760000538
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