Cobalt(II)-Catalyzed Bis-isocyanides Insertion Reactions with Boric Acids and Sulfonyl Azides via Nitrene Radical Coupling: Cobalt(II)-Catalyzed Bis-isocyanides Insertion Reactions with Boric Acids and Sulfonyl Azides via Nitrene Radical Coupling†

A Co(II)-catalyzed effective synthesis of amidinium imine derivatives from the reaction of isocyanides and boric acids using organic azides as nitrene source has been developed. This protocol provides a new, environment-friendly and simple strategy to construct amidinium imine derivatives with a range of substrates without any oxidants and additives.