Visible‐Light‐Driven Iron‐Catalyzed Atom Transfer Radical Addition of CH₂Br₂ to Alkenes: Facile Access to 1,3‐Dibromo Compounds

An efficient visible‐light‐mediated iron‐catalyzed atom transfer radical addition (ATRA) reaction between CH 2 Br 2 and various alkenes has been developed. This transformation provides direct access to synthetically valuable 1,3‐dibromo compounds with excellent atom economy under mild reaction conditions. The protocol demonstrates remarkable versatility, exhibiting broad substrate scope and excellent functional group compatibility. Notably, the obtained 1,3‐dibromo products function as highly versatile synthetic building blocks. Through rationally designed one‐pot multistep transformations, these intermediates can be conveniently converted into structurally diverse derivatives, including oxetanes and allyl bromides, directly from terminal alkenes.