An entry to vinylcyclopropane through palladium-catalyzed intramolecular cyclopropanation of alkenes with unstabilized allylic tosylhydrazones†
Abstract
A diastereoselective Pd-catalyzed intramolecular cyclopropanation of alkenes with unstabilized allylic tosylhydrazones was developed. This methodology provides an efficient entry toward synthesis of the bicyclo[3.1.0] hexane system with an exo-double bond, and sets the basis for future elaboration of more complex polycyclic motifs.