Immobilized palladium on surface-modified Fe3O4/SiO2 nanoparticles: as a magnetically separable and stable recyclable high-performance catalyst for Suzuki and Heck cross-coupling reactions

被引：163
|
作者：
Du, Qingwei [1 ]
Zhang, Wei [1 ]
Ma, Hao [1 ]
Zheng, Jia [1 ]
Zhou, Bo [1 ]
Li, Yiqun [1 ]
机构：
[1] Jinan Univ, Dept Chem, Guangzhou 510632, Guangdong, Peoples R China
来源：
TETRAHEDRON | 2012年 / 68卷 / 18期
基金：
中国国家自然科学基金;
关键词：
Magnetic nanoparticle support; Palladium; Heterogeneous catalysts; Suzuki reaction; Heck reaction; RECOVERABLE CATALYST; PD; SONOGASHIRA; NANOCOMPOSITE; GREEN; HYDROGENATION; NANOCATALYSTS; HALIDES;
D O I：
10.1016/j.tet.2012.03.008
中图分类号：
O62 [有机化学];
学科分类号：
070303 ; 081704 ;
摘要：
A palladium-based catalyst (Fe3O4/SiO2/HPG-OPPh2-PNP) supported on chlorodiphenylphosphine-functionalized magnetic nanoparticles was successfully prepared from Fe3O4/SiO2 with sequential attachment of glycerol and chlorodiphenylphosphine, followed by treatment of an ethanolic solution of palladium chloride with hydrazine. The as-prepared catalyst was characterized by ICP-AES, FTIR, XRD, SEM, and TEM. The Fe3O4/SiO2/HPG-OPPh2-PNP was found as a magnetically separable and highly active catalyst for Suzuki coupling reactions of aryl iodides, bromides, and chlorides as well as Heck reactions of aryl iodides and bromides. Under appropriate conditions, all reactions afforded the desired products in moderate to excellent yields. Moreover, this catalyst can be easily recovered by using a magnetic field and directly reused for at least six cycles without significant loss of its activity. (C) 2012 Elsevier Ltd. All rights reserved.
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页码：3577 / 3584
页数：8
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