The Westphalen rearrangement of 5α,6β-disubstituted steroids has been applied to a 4β,5α-disubstituted compound. Treatment of the title compound with potassium hydrogen sulphate in acetic anhydride gave 5-methyl-19-nor-5β-cholest-9-ene-4β,7β-diyl diacetate. Conversion of the latter into 5-methyl-19-nor-5β-cholest-8(9)-ene-4,7-dione supports its formulation.
A. R. Davies and G. H. R. Summers, J. Chem. Soc. C, 1966, 1010 DOI: 10.1039/J39660001010
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