Photopromoted carbonylation of bromobenzene under ambient conditions  

作　　者：Li Zhuo Mu Ying Ping Jia Jing Mei Yin Guang Yun Zhou Ying Na Cui Da Bin Gao 

机构地区：[1]Liaoning Key Laboratory of Bio-organic Chemistry, Dalian University, Dalian 116622, China

出　　处：《Chinese Chemical Letters》2009年第5期531-534,共4页中国化学快报（英文版）

基　　金：the Science and Technology Research Project for University of Liaoning Province(No.20060038)for the generous financial support.

摘　　要：The photopromoted carbonylation of bromobenzene with carbon monoxide catalyzed by inexpensive commercially available cobalt salts [Co（OAc）2, COCl2] was carried out under ambient conditions. The results revealed that methyl benzoate was produced in the presence of basic additives （CH3ONa, NaOAc or （n-C4H9）3N）. The catalytic activity of Co（OAc）2 was higher than that of COCl2. Furthermore, the activity of the carbonylation was greatly improved by addition of acetophenone, e.g. both the yield and selectivity of the ester were increased from 47% to 91% with Co（OAc）2 as catalyst and CH3ONa as additive, while the yield of byproduct benzene from hydrodehalogenation of bromobenzene decreased from 32% to 8%.The photopromoted carbonylation of bromobenzene with carbon monoxide catalyzed by inexpensive commercially available cobalt salts [Co（OAc）2, COCl2] was carried out under ambient conditions. The results revealed that methyl benzoate was produced in the presence of basic additives （CH3ONa, NaOAc or （n-C4H9）3N）. The catalytic activity of Co（OAc）2 was higher than that of COCl2. Furthermore, the activity of the carbonylation was greatly improved by addition of acetophenone, e.g. both the yield and selectivity of the ester were increased from 47% to 91% with Co（OAc）2 as catalyst and CH3ONa as additive, while the yield of byproduct benzene from hydrodehalogenation of bromobenzene decreased from 32% to 8%.

关 键 词：Photopromoted carbonylation BROMOBENZENE Cobalt salts Sodium methoxide ACETOPHENONE 

分 类 号：O625.21[理学—有机化学] TQ225.122[理学—化学]