The cis-disubstituted oxocanes lauthisan (1) and laurenan (2) have been prepared from the lactone precursors (9b) and (9a) respectively by a sequence in which the key steps were methylenation and stereoselective hydroboration of the resulting enol ethers (11b) and (11a).
R. W. Carling and A. B. Holmes, J. Chem. Soc., Chem. Commun., 1986, 565 DOI: 10.1039/C39860000565
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