The title compound has been prepared from 5β-pregnane-3α-20α-diol by way of the 3-tetrahydropyranyl ether. During unsuccessful approaches to the same conjugate, reduction of the keto-group of 20α-hydroxy-5β-pregnan-3-one sulphate with borohydride was found to be inhibited by the pyridinium sulphate residue.
M. S. Rajagopalan and A. B. Turner, J. Chem. Soc. C, 1970, 2266 DOI: 10.1039/J39700002266
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