SCHEDULED MAINTENANCE
Treatment of a 17-hydroxyimino-steroid with refluxing acetic anhydride and pyridine affords an equilibrium mixture of 13-epi-enimide and 13-epi-enamide. A free-radical mechanism is proposed. Acidic hydrolysis gives the 17-oxo-13-epi-steroid in high overall yield.
R. B. Boar, F. K. Jetuah, J. F. McGhie, M. S. Robinson and D. H. R. Barton, J. Chem. Soc., Perkin Trans. 1, 1977, 2163 DOI: 10.1039/P19770002163
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