Reduction of 5a-cholestan-3-one with various precipitated metals using water as a hydrogen donor was investigated. Precipitated cobalt in I-BuOH and nickel in dioxane afforded 5a-cholestan-3a-ol favorably. Some multi-component precipitated metals were found to show high activity.On a examine la reduction de la 5a-cholestanone-3 par divers mttaux pricipites et utilisant de I'eau comme donneur d'hydrogene. Du cobalt prtcipite dans le f-BuOH et du nickel dans la dioxanne menent favorablement au 5a-cholestanol-3a. On a trouvk que quelques metaux pricipites contenant plusieurs composants possedent une grande activite.[Traduit par le journal]Can. J. Chem., 51,3923 (1973)
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