【摘要】 报道了在Pd（acac）₂-pph₃-C₂H₅OH均相催化体系上一氧化碳偶联合成草酸二乙酯的研究结果。实验结果表明,在60℃、CO压力3.0MPa、pph₃/Pd（acac）₂mol比为3∶1及Pd（acac）₂浓度为0.100g的条件下,Pd（acac）₂络合催化剂具有较高的反应活性和选择性。温度、压力变化对副产物碳酸二乙酯的活性影响不大。最后,对反应机理进行初步探讨。更多还原

【Abstract】 Under the mild conditions,the effects of reaction temperature,pressure and different pph₃/Pd（acac ）₂ ratios on the synthesis of diethyl oxalate by CO-coupling over Pd （acac）₂—complex catalyst were studied. The catalytic activity and selectivity of Pd （acac）₂—complex catalyst were satisfactory for the synthesis of diethyl oxalate. According to the above results, a possible reaction mechanism was proposed.更多还原