The preparation of the title compound and a number of other 2,5-seco-A-dinorcholestanes, and of some 3,5-seco-A-norcholestanes is described. Three heterocyclic steroids are mentioned; a 4-oxacholestene (6) and the 3-oxa-and 3-aza-A-norcholestan-2-ones (11) and (13), respectively. Two mixed ethoxyformic anhydrides (10) and (12) were made; the contrast in their activity towards nitrogen nucleophiles is discussed.
G. H. Cooper and L. E. J. Moir, J. Chem. Soc., Perkin Trans. 1, 1972, 2755 DOI: 10.1039/P19720002755
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