Visible‐Light‐Driven Synthesis of Ester‐Substituted Imidazole‐Fused Heterocycles via Tandem Radical Cyclization

Abstract A novel tandem radical cyclization strategy is reported for the efficient synthesis of ester‐functionalized imidazole‐fused heterocycles. This method leverages visible‐light photocatalysis and modular substrate design to achieve high regioselectivity and atom economy. The protocol demonstrates broad compatibility with diverse N ‐allylimidazoles and bromoacetates, enabling rapid construction of structurally complex products under mild conditions.