Palladium-Catalyzed Carbonylative Synthesis of Amides from Aryltriazenes under Additive-Free Conditions

An interesting palladium-catalyzed carbonylative synthesis of amides from aryltriazenes was developed. By using Pd(MeCN2)Cl-2 as the catalyst precursor under CO pressure through a N-2 extrusion/CO insertion sequence, a broad range of aryltriazenes were transformed into the corresponding amides in good yields with excellent functional group tolerance. Remarkably, no additives such as acids or phosphine ligands were required.