Radical cyclisation strategies to bridged systems. Regioselective construction of chiral bicyclo [2.2.2] and [3.2.1] octanes via 6-exo trig and 5-exo trig radical cyclisation reactions

Article abstract of DOI:10.1016/S0040-4020(01)85623-4

Radical cyclisation reaction of the bromoenones 6 and 7, obtained from (R)-phenyl carvone 3, gave a mixture of bicyclo [2.2.2] and [3.2.1] octanones via competitive 6-exo trig and 5-exo trig modes. On the other hand, radical cyclisation reaction of the al