The sterocontrolled synthesis of trans-octahydroanthracenes 3, 11 and 14 through implementation of an efficient and highly regioselective 6-endo-trig-aryl radical cyclisation of the respective 2-(o-bromobenzyl)-1-methylenecyclohexanes 2, 10 and 13, with tri-n-butyltin hydride is reported, along with a single crystal X-ray structure determination of 11.
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Pal et al. (1991) studied this question.