Citation: Li Zhuo Mu, Ying Ping Jia, Jing Mei Yin, Guang Yun Zhou, Ying Na Cui, Da Bin Gao. Photopromoted carbonylation of bromobenzene under ambient conditions[J]. Chinese Chemical Letters, ;2009, 20(5): 531-534. doi: 10.1016/j.cclet.2009.01.008 shu

Photopromoted carbonylation of bromobenzene under ambient conditions

Liaoning Key Laboratory of Bio-organic Chemistry, Dalian University, Dalian 116622, China

Received Date: 10 October 2008

Fund Project: We are indebted to the Science and Technology Research Project for University of Liaoning Province (No.20060038) for the generous financial support.

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%.
- Photopromoted carbonylation,
- Bromobenzene,
- Cobalt salts,
- Sodium methoxide,
- Acetophenone
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