Visible-light-mediated substituent-controlled regiodivergent (2 + 2)/(3 + 2) cycloadditions for the synthesis of aza-analogs of β-lactam and γ-fused lactam derivatives

Substituent-controlled regiodivergent synthesis of aza-analogs of β-lactam and γ-fused lactam derivatives via the visible-light-induced Wolff rearrangement of α-diazoketones and azo esters.