Abstract
The crystal structure and NMR characterization of methyl 3α,7α-dihydroxy-12-oxo-5β-cholanate are described. The title compound which was obtained from methyl cholanate in a 3-step synthetic sequence that does not alter the starting chirality, crystallizes in the monoclinic system with P 21 space group. While despite the substitution pattern rings A, B and C adopt chair conformations, the 5 membered D ring, that bears the side chain attached to C-17, shows a twisted conformation on C-13–C-14. In the crystal array, classical hydrogen bond interactions O–H···H and intermolecular contacts C–H···O of hydrogen bond type are observed. The crystal structure and NMR characterization of Methyl α,7α-dihydroxy-12-oxo-5β-cholanate are described.
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