Carbonylation of iodobenzene catalyzed by water-souble palladium–phosphine complexes in ionic liquid

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• 作者：Qi Lin ; Chaofen Yang ; Weidong Jiang ; Hua Chen ; Xianjun Li
• 关键词：Ionic liquid ; Palladium ; TPPTS ; Carbonylation ; Iodobenzene
• 刊名：Journal of Molecular Catalysis A ; Chemical
• 出版年：2007
• 期刊代码：57_13811169
• 类别：ch
• 出版时间：1 March 2007
• 卷：264
• 期：1-2
• 页码：17-21
• 文件大小：133 K

摘要

The carbonylation of iodobenzene catalyzed by water-soluble palladium–TPPTS complex (TPPTS: trisodium salt of tri(m-sulphonylphenyl)phosphine) has been investigated in ionic liquid 1-n-butyl-3-methylimidazolium p-toluenesulfonate ([bmim][p-CH₃C₆H₄SO₃]) in the presence of alcohol. The ionic liquid [bmim][p-CH₃C₆H₄SO₃] used as the reaction media brings some definitive advantages over the halogen-containing analogue [bmim]BF₄, [bmim]PF₆ and conventional organic solvents. The combination of palladium–TPPTS complex and [bmim][p-CH₃C₆H₄SO₃] exhibits excellent catalytic activity and selectivity, and simplifies the separation of the products from catalyst. In the carbonylation of iodobenzene, TOF (turnover frequency) of up to 1938 h⁻¹ was observed and the selectivity for ethyl benzoate was over 99%. The catalyst can be easily separated from the organic products and reused for 10 times without the significant decrease of activity and selectivity.