Hydroxy-ketones in the 5α-androstane series are converted into fluoro-ketones by diethylaminosulphur trifluoride under mild conditions; acetoxy-ketones give acetoxydifluorides under more vigorous conditions.
T. G. C. Bird, P. M. Fredericks, E. R. H. Jones and G. D. Meakins, J. Chem. Soc., Chem. Commun., 1979, 65 DOI: 10.1039/C39790000065
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