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  • Title: Synthesis of 7- and 12-hydroxy- and 7,12-dihydroxy-3-keto-5 beta-cholan-24-oic acids by reduction of 3,7-, 3,12- and 3,7,12-oxo derivatives.
    Author: Fantin G, Fogagnolo M, Medici A, Pedrini P, Cova U.
    Journal: Steroids; 1993 Nov; 58(11):524-6. PubMed ID: 8273114.
    Abstract:
    7 alpha-, 12 alpha-, 12 beta-Hydroxy and 7 alpha,12 alpha- and 7 alpha,12 beta-dihydroxy-3-ketocholanoic acids were prepared in satisfactory yields protecting the 3-keto group as dimethyl ketal and subsequent reduction with sodium borohydride of the corresponding 7- and 12-oxo functionalities. The same procedure gave also 3,12-diketo-7 alpha-hydroxy-cholanoic acid.
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