Cobalt Salts-Catalyzed Carbonylation of Aromatic Halides under Photostimulation

Abstract A novel method for the carbonylation of aromatic halides by the cobalt salt catalysts such as Co(OAc)2·4H2O, CoCl2·6H2O, CoSO4·7H2O, Co(OH)2, Co(OH)3, CoO,and Co2O3 was investigated in an aqueous alkaline solution under photostimulation. These salts were found to have a catalytic activity as high as that of Co2(CO)8 under mild conditions.