Straightforward Access to the [3.2.2]Nonatriene Structural Framework via Intramolecular Cyclopropenation/Buchner Reaction/Cope Rearrangement Cascade

A one-pot cascade process of benzyl enoldiazoacatates, initiated by dirhodium(II)-catalyzed intramolecular cyclopropene formation, occurs via a subsequent Buchner reaction and Cope rearrangement to provide straightforward access to bicyclo[3.2.2]nonatriene derivatives in high yields and selectivities.