Four-Component Radical Dual Difunctionalization (RDD) of Two Different Alkenes with Aldehydes and -Butyl Hydroperoxide (TBHP): An Easy Access to β,δ-Functionalized Ketones.

A convenient Fe-catalyzed four-component radical dual difunctionalization and ordered assembly of two alkenes with aromatic/aliphatic aldehydes and TBHP to provide chain elongated β,δ-functionalized ketones via a one-pot procedure has been developed. Aldehydes were homolytically cleavaged to produce acyl radicals and subsequently allowed for the successive construction of C(sp)-C(sp), C(sp)-C(sp), and C(sp)-O bonds via dual radical insertions and radical-radical coupling, following the intrinsic nucleo/electrophilic reactivity of both the radicals and alkenes.