@-Fission and hydrogen-atom abstraction, both inter-and intramolecular, are important characteristic reactions of alkoxy radicals.'. 2 Such processes play a key role in various synthetically important transformations including, inter the Barton rea~ tion,~ the ring opening of cyclic compounds by regioselective CC bond fi~ sion,~ and the formation of cyclic Also, by such reactions alkoxy radicals act as initiators for vinyl polymerization and ...