| Highly active rhodium/phosphorus catalytic system for the hydroformylation of α-methylstyrene |
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| 作者姓名： | Xue-Li Zheng Cong-Ye Zheng Fan-Ding Zhou Hai-Yan Fu Mao-Lin Yuan Rui-Xiang Li Bin Xu Hua Chen |
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| 作者单位： | a Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China;
b Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Zigong 643000, China |
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| 基金项目： | The authors thank the financial support from the National Natural Science Foundation of China (No. 201202108), from the Opening Project of Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education (No. LZJ1402), and from the Sichuan university outstanding scholar research fund (No. 2015SCU04A05). |
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| 摘 要： | Rhodium catalyzed hydroformylation of a-methylstyrene was investigated in the presence of monodentate phosphine ligands L1–L6. We found that the phosphine with good p-acceptability could efficiently improve the activity of the a-methylstyrene hydroformylation. The big steric hindrance of a-C in a-methylstyrene enhanced the regioselectivity towards the linear aldehyde, which resulted in3-phenylbutanal as the predominant product(99.0%). When tris(N-pyrrolyl)phosphine(L1) modified Rh(acac)(CO)_2was employed as the catalyst, the TOF could reach up to 5786 h~(-1)in the a-methylstyrene hydroformylation at relatively mild conditions(110 8C, 6 MPa).
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Highly active rhodium/phosphorus catalytic system for the hydroformylation of α-methylstyrene |
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| Xue-Li Zheng,Cong-Ye Zheng,Fan-Ding Zhou,Hai-Yan Fu,Mao-Lin Yuan,Rui-Xiang Li,Bin Xu,Hua Chen.Highly active rhodium/phosphorus catalytic system for the hydroformylation of α-methylstyrene[J].Chinese Chemical Letters,2016,27(5):678-680. |
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| Authors: | Xue-Li Zheng Cong-Ye Zheng Fan-Ding Zhou Hai-Yan Fu Mao-Lin Yuan Rui-Xiang Li Bin Xu Hua Chen |
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| Institution: | a Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China;
b Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Zigong 643000, China |
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| Abstract: | Rhodium catalyzed hydroformylation of α-methylstyrene was investigated in the presence of monodentate phosphine ligands L1-L6. We found that the phosphine with good π-acceptability could efficiently improve the activity of the α-methylstyrene hydroformylation. The big steric hindrance of α-C in α-methylstyrene enhanced the regioselectivity towards the linear aldehyde, which resulted in 3-phenylbutanal as the predominant product (>99.0%). When tris(N-pyrrolyl)phosphine (L1) modified Rh(acac)(CO)2 was employed as the catalyst, the TOF could reach up to 5786 h-1 in the α-methylstyrene hydroformylation at relatively mild conditions (110℃, 6 MPa). |
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| Keywords: | α-Methylstyrene Hydroformylation Rh complex Phosphine Pyrrole |
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