Highly active rhodium]phosphorus catalytic system for the hydroformylation of α-methylstyrene  

作　　者：Xue-Li Zheng Cong-Ye Zheng Fan-Ding Zhou Hai-Yan Fu Mao-Lin Yuan Rui-Xiang Li Bin Xu Hua Chen 

机构地区：[1]Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China [2]Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Zigong 643000, China

出　　处：《Chinese Chemical Letters》2016年第5期678-680,共3页中国化学快报（英文版）

基　　金：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);from the Sichuan university outstanding scholar research fund (No. 2015SCU04A05)

摘　　要：Rhodium catalyzed hydroformylation of α-methylstyrene was investigated in the presence of monodentate phosphine ligands L1-L6. We found that the phosphine with good n-acceptability could efficiently improve the activity of the α-methylstyrene hydroformylation. The big steric hindrance ofα-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 hvdroformvlation at relatively mild conditions （110 ℃, 6 MPa）.Rhodium catalyzed hydroformylation of α-methylstyrene was investigated in the presence of monodentate phosphine ligands L1-L6. We found that the phosphine with good n-acceptability could efficiently improve the activity of the α-methylstyrene hydroformylation. The big steric hindrance ofα-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 hvdroformvlation at relatively mild conditions （110 ℃, 6 MPa）.

关 键 词：α-Methytstyrene Hydroformylation Rh complex Phosphine Pyrrole 

分 类 号：O643.36[理学—物理化学]