Radical cyclization strategies to terpenoids; syntheses of (±)-β-cuparenone, (±)-laurene and epilaurenes

Article abstract of DOI:10.1016/S0040-4020(01)90504-6

Radical cyclization of the bromide 8, obtained in 5 steps from the ketone 9, furnished exclusively 14 via 6-endo frig cyclization with out any observable amount of 5-exo trig product 1. 5-Exo dig radical cyclization of the bromo acetate 23, prepared from