Alumina catalyst with high density of medium acid sites for N-arylpyrrolidines synthesis

被引:2
|
作者
Chen, Yingkang [1 ]
Zhang, Hang [1 ]
Li, Hongmei [1 ]
Hu, Junhua [3 ]
Long, Yan [1 ,2 ,4 ]
Liu, Min [1 ]
机构
[1] Cent South Univ, Hunan Joint Int Res Ctr Carbon Dioxide Resource Ut, Sch Phys & Elect, State Key Lab Powder Met, Changsha 410083, Peoples R China
[2] Jinan Univ, Sch Environm, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 511443, Peoples R China
[3] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou, Peoples R China
[4] Cent South Univ, Sch Phys & Elect, Changsha 410083, Peoples R China
基金
中国博士后科学基金;
关键词
N-arylpyrrolidines; Heterogeneous catalyst; Alumina; Medium acid site; Carbocation; ARYL-SUBSTITUTED AZACYCLES; PRIMARY AMINES; REDUCTIVE AMINATION; AROMATIC-AMINES; GAMMA-ALUMINA; LACTIC-ACID; PYRROLIDINE; PYRIDINE; TRANSFORMATION; DERIVATIVES;
D O I
10.1016/j.apcata.2022.118668
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The N-alkylation of amines with tetrahydrofuran (THF) to synthesize pyrrolidine compounds is an economic and environmental benign route. However, current catalytic system often suffered from harsh reaction condition and hazardous reagents. In this work, we developed an alumina nanosheet catalyst with a large amount of medium acid sites for synthesis of N-arylpyrrolidines. Nearly 100% target product yield could be obtained at 190 ?, and this catalyst could be reused at least 5 times without obvious deactivation. NH3-temperature programmed desorption (TPD) and pyridine-infrared (py-IR) revealed that the catalytic performance is positively correlated with the content of medium acid sites. In-situ IR spectrum proved that the reaction follows the carbocation mechanism. This work affords a competitive system for green sustainable chemistry.
引用
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页数:8
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