Effect of Co-solvent on the Palladium Catalyzed Alkoxycarbonylation of Allyl Bromide in Supercritical CO_2  

作　　者：Rui Qi SONG Jian Qing ZENG Bing ZHONG 

机构地区：[1]Guangzhou Institute of Chemistry,Chinese Academy of Sciences,Guangzhou 510650 [2]State Key Laboratory of Coal Chemistry,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001 [3]School of Chemistry and ChemicalEngineering Zhongshan University,Guangzhou 510275

出　　处：《Chinese Chemical Letters》2002年第10期933-934,共2页中国化学快报(英文版)

摘　　要：The effect of cosolvent on the palladium catalyst which catalyze alkoxycarbonylation of allyl bromide in supercritical CO2 has been investigated. It was found that a small amount of cosolvent such as ethanol, CH2Cl2 and cyclohexane can affect both reaction yields and selectivities largely. Ethanol was the most favorable cosolvent for increasing the total yield of unsaturated esters and the selectivity of 3-butenoic acid ester. Using cosolvent ethanol and cocatalyst FeCl2 Simultaneously can lead to better reaction results.The effect of cosolvent on the palladium catalyst which catalyze alkoxycarbonylation of allyl bromide in supercritical CO2 has been investigated. It was found that a small amount of cosolvent such as ethanol, CH2Cl2 and cyclohexane can affect both reaction yields and selectivities largely. Ethanol was the most favorable cosolvent for increasing the total yield of unsaturated esters and the selectivity of 3-butenoic acid ester. Using cosolvent ethanol and cocatalyst FeCl2 Simultaneously can lead to better reaction results.

关 键 词：Supercritical CO2 COSOLVENT ALKOXYCARBONYLATION PALLADIUM COCATALYST FeCl2. 

分 类 号：O643.3[理学—物理化学]