Palladium Complexes with Pyrimidine-Functionalized N-Heterocyclic Carbene Ligands: Synthesis, Structure and Catalytic Activity

被引：139

作者：

Meyer, Dirk ^{[1
]}

Taige, Maria A. ^{[1
]}

Zeller, Alexander ^{[1
]}

Hohlfeld, Konrad ^{[1
]}

Ahrens, Sebastian ^{[1
]}

Strassner, Thomas ^{[1
]}

机构：

[1] Tech Univ Dresden, D-01062 Dresden, Germany

来源：

ORGANOMETALLICS | 2009年 / 28卷 / 07期

关键词：

MIZOROKI-HECK REACTION; C COUPLING REACTIONS; OLEFIN METATHESIS CATALYSTS; METAL-COMPLEXES; HETEROGENEOUS CATALYSIS; RUTHENIUM CATALYSTS; EFFICIENT CATALYSTS; HIGHLY EFFICIENT; IONIC LIQUIDS; NHC-COMPLEXES;

D O I：

10.1021/om8009238

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A series of novel pyrimidine functionalized palladium(II)(NHC) complexes with aryl and alkyl substituents [1-(2-Pyrimidyl)-3-(aryl or alkyl)imidazoline-2-ylidene palladium(II) chlorides] was synthesized by transmetalation via the corresponding silver complexes. All compounds have been fully characterized by H-1 and C-13 NMR spectroscopy, elemental analysis, and in two cases by X-ray single crystal structures. Different solid state structures were observed for aryl and alkyl substituted ligands: for the sterically less demanding methyl substituent, a complex is formed, where two ligands are coordinated to one metal center [Pd(L)(2)Cl](+), While in the mesityl case a [Pd(L)Cl-2] structure was observed. They show good catalytic activity in the CH activation of methane as well as in the Mizoroki-Heck reaction, where especially the methyl substituted complex shows a remarkably high activity combined with a very high selectivity.

引用

页码：2142 / 2149

页数：8

共 75 条

[1] One-pot 2-aryl/vinylindole synthesis consisting of a ruthenium-catalyzed hydroamination and a palladium-catalyzed Heck reaction using 2-chloroaniline [J].