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Abstract
The title hydrocarbon and its 11-methyl homologue have been synthesised in one-step reactions by titanium tetrachloride induced condensation of 1-naphthylacetaldehydes with the trimethysilyl enol ether of cyclopentanone in yields of the about 20%. Like the 17-ketones of this series, microsomal oxidation of these hydrocarbons occurs mainly in the five-membered ring, and not at all at the electron-rich 6,7-double bond.