Photoinduced Reduction and Deuteration of Aryl Halides with NHC‐Boranes

Herein, an operationally simple photoinduced radical reduction of aryliodides and arylbromides using NHC‐borane as a reductant, without external radical initiator or photoredox catalyst, is reported. Mechanistic investigations indicate the key formation of an aryl radical, which undergoes facile reduction by NHC‐borane. The method demonstrates compatibility with a broad range of functional groups, providing a valuable tool for synthesis and isotopic labeling.