Photoinduced Copper‐Catalyzed Radical Ring‐Opening Azidation of Cyclic Oxime Esters

A photoinduced copper‐catalyzed radical ring‐opening azidation of cyclic oxime esters has been developed for the synthesis of valuable γ ‐azido alkylnitriles. Furthermore, a one‐pot sequential strategy integrating this ring‐opening azidation with copper‐catalyzed azide–alkyne cycloaddition is successfully implemented, enabling the direct construction of 1,2,3‐triazole derivatives in a single operation.