A highly regioselective 8-endo-trig-aryl radical cyclisation of the vinylcyclohexanols 2a-c and allylcyclohexanols 6a-c with tri-n-butyltin hydride provides decahydrodibenzo-[a,e]- and -[a,d]-cyclooctenols 3a-c and 7a-c respectively, in moderate to good yields.
K. Ghosh, A. K. Ghosh and U. R. Ghatak, J. Chem. Soc., Chem. Commun., 1994, 629 DOI: 10.1039/C39940000629
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