SCHEDULED MAINTENANCE
The (±)-pentalenene 1 and (±)-epi-pentalenene 12 have been synthesised by a novel spiro-annulation strategy that allowed the subsequent formation of two of the five-membered rings by aldol condensations; the order of reduction of two double bonds in a bicyclic intermediate 8 led, in a Stereoselective manner, to one C-9 epimer or the other.
Y. Wu and D. J. Burnell, J. Chem. Soc., Chem. Commun., 1991, 764 DOI: 10.1039/C39910000764
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