Mp. Bertrand et al., RADICAL REARRANGEMENTS OF VINYLCYCLOPROPANES AS A ROUTE TO BICYCLIC LACTONES, LACTAMS AND KETONES, Synlett, (9), 1994, pp. 736-738
The free-radical mediated vinylcyclopropanes annulation offers an effi
cient route to fused or bridged bicyclic compounds via sequential radi
cal addition, ring opening, tandem ring closures and fragmentation.