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We here report a new approach of oxalic ester synthesis through ox-idation carbonylation of alcohol in the presence of new bimetal complex systemsunder mild conditions. By suggesting that the active complex (PPh_3)_2Pd(OAC)_2/OV (acac)_2 and the oxalic ester are produced through the coupling ofthe alkoxyl-carbonyl-palladium complex as intermediate, the mechanism of theformation of diethyl oxalic ester via the coupling of CO with C_2H_5OH is pro-posed.
We here report a new approach of oxalic ester synthesis through ox-idation carbonylation of alcohol in the presence of new bimetal complex systems under mild conditions. By suggesting that the active complex (PPh_3) _2Pd (OAC) _2 / OV (acac) _2 and the oxalic ester are produced through the coupling of the alkoxyl-carbonyl-palladium complex as intermediate, the mechanism of theformation of diethyl oxalic ester via the coupling of CO with C_2H_5OH is pro-posed.