Pd/Cu‐free Heck and Sonogashira coupling reactions applying cobalt nanoparticles supported on multifunctional porous organic hybrid

Abstract A new heterogeneous cobalt catalyst has been synthesized by immobilizing Co species onto a nitrogen‐rich porous organic polymer (Co@imine‐POP). The heterogeneous catalyst synthesized was efficient in Heck and Sonogashira cross‐coupling reactions in green media under mild reaction conditions without inert air and phase transfer agents. This phosphine‐, copper‐, and palladium‐free catalyst was stable under the reaction conditions and could be reused for at least eight successive runs without a discernible decrease in its catalytic activity.