Pregnan-20-ones (1) and (4), and 3β-hydroxy-5α-cholestan-6-one (7) react with KO2 and 18-crown-6 in benzene solution and únder an oxygen atmosphere at 6–7 °C to give the corresponding α-hydroperoxides (2), (5), and (8) which after treatment with Ph3P gives α-ketols (3), (6), and (9) in good yields.
C. Betancor, C. G. Francisco, R. Freire and E. Suárez, J. Chem. Soc., Chem. Commun., 1988, 947 DOI: 10.1039/C39880000947
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