Magnetically recoverable catalysts based on mono- or bis-(NHC) complexes of palladium for the Suzuki-Miyaura reaction in aqueous media: two NHC-Pd linkages are better than one

被引：19

作者：

Martinez-Olid, Francisco ^{[1
]}

Andres, Roman ^{[1
]}

de Jesus, Ernesto ^{[1
]}

Flores, Juan C. ^{[1
]}

Gomez-Sal, Pilar ^{[1
]}

Heuze, Karine ^{[2
]}

Vellutini, Luc ^{[2
]}

机构：

[1] Univ Alcala, Dept Quim Organ & Quim Inorgan, Campus Univ, Madrid 28871, Spain

[2] Univ Bordeaux, Inst Sci Mol, 351 Cours Liberat, F-33405 Talence, France

来源：

DALTON TRANSACTIONS | 2016年 / 45卷 / 29期

关键词：

HETEROCYCLIC CARBENE COMPLEXES; RETRIEVABLE CATALYSTS; EFFICIENT CATALYSTS; NANOPARTICLES; ORGANOSILICA; SUPPORTS; HECK;

D O I：

10.1039/c6dt01330a

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Pre-synthesized mono-and bis(NHC) palladium complexes have been grafted onto magnetic core/shell gamma-Fe2O3/silica particles and tested as catalysts in model Suzuki-Miyaura coupling reactions. The bis(NHC) immobilized complex was found to be a robust catalyst that can operate under mild conditions in aqueous media, even for the activation of chloroarene, whereas the mono(NHC) counterpart rapidly deactivates. Moreover, it can be readily recovered by magnetic separation and reused many times, providing very high productivities, and with so low leaching of palladium that the crude products obtained contain <= 10 ppm Pd.

引用

页码：11633 / 11638

页数：6