Heck reaction catalyzed by flower-like cobalt nanostructures

Heck reaction catalyzed by flower-like cobalt nanostructures has been developed; the coupling of alkenes with aryl halides under ligand-free condition without the need to exclude air or moisture provides the corresponding products with moderate to good yields. More importantly, the cheap catalysts are stable under the reaction conditions and can be reused for at least six successive runs without any additional activation treatment.