[reaction: see text] It is demonstrated that alkene radical cations generated by the radical ionic fragmentation of beta-(phosphatoxy)alkyl radicals undergo efficient nucleophilic capture by amines in either the 6-exo or 6-endo modes, leading to six-membered nitrogen heterocycles. Suitable placement of an alkene enables the juxtaposition of a radical cyclization resulting in the formation of both the indolizidine and 1-azabicyclo[3.2.1]octane skeleta.
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