metal-organic framework mil-53(fe) as a highly efficient reusable catalyst for the synthesis of 2-aryl-1h-benzimidazole

Metal-organic framework mil-53(fe) (mil = materials of institute lavoisier) as a recyclable and heterogeneous catalyst efficiently catalyzed the synthesis of 2-aryl-1h-benzimidazole derivatives from ophenylenediamine and aldehydes in solvent-free condition. this method provides benzimidazole in with good to excellent yields and little catalyst loading. furthermore, the catalyst can be readily isolated by filtering as no obvious loss of activity can be observed when the catalyst was reused in five consecutive runs.