The total synthesis of (+)-cyperolone (I), an eudesmane-derived sesquiterpenoid from Cyperus rotundus, is described.
The de novo synthesis was accomplished via a 15 step sequence starting from (R)-(-)-carvone. The synthetic route
features a platinum-catalyzed cycloisomerization to rapidly construct the bicyclic core from a 3-silyloxy-1,5-enyne
intermediate.