Abstract
Functionalization of the ( η 6-arene)tricarbonylchromium(O) complexes of some podocarpic acid ( 1) derivatives has been achieved through the addition-protonation route. The resulting dienol ethers underwent acid-promoted hydrolysis giving enones which were subsequently reduced to saturated ketones. Acid-promoted cyclopentaannulation of these ketones produced compounds with tetracyclic steroidal skeletons in good yield.
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