Visible-light induced 1,2-dicarbofunctionalization of alkenes with quinoxalin-2(1H)-ones and malonic esters.

Visible-light photoredox catalyzed 1,2-arylalkylation of alkenes with quinoxalin-2(1H)-ones and malonic esters has been developed through direct C(sp2)-H/C(sp3)-H functionalization under mild conditions. A number of quinoxalin-2(1H)-one containing esters could be obtained in moderate to good yields in a step and atom-economic manner. This transformation proceeded through a radical process, which features the advantages of mild conditions, a clean energy source, a wide substrate scope, and favorable functional group compatibility.