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1,4-Epoxy-1,4-dihydroarenes are converted in high yields into the corresponding arenes with enneacarbonyldiiron in refluxing benzene solution.

The sesquiterpene ()-sinularene (exo-5-isopropyl-2-methyl-7-methylenetricyco[4,4,0,02,8]decane) has been synthesised by a 15-step sequence starting with anti-7-methylbicyclo[2,2,1]heptane-syn- 7, exo-2-carbolactone.