Ruthenium(II)-(Arene)-N-Heterocyclic Carbene Complexes: Efficient and Selective Catalysts for the N-Alkylation of Aromatic Amines with Alcohols

被引:21
|
作者
Kaloglu, Nazan [1 ,2 ]
Achard, Mathieu [3 ]
Bruneau, Christian [3 ]
Ozdemir, Ismail [1 ,2 ]
机构
[1] Inonu Univ, Fac Sci & Art, Dept Chem, TR-44280 Malatya, Turkey
[2] Inonu Univ, Catalysis Res & Applicat Ctr, TR-44280 Malatya, Turkey
[3] Rennes Univ, CNRS, ISCR, UMR6226, F-35000 Rennes, France
关键词
Carbene ligands; Ruthenium; Aromatic amines; Homogeneous catalysis; Alkylation; Borrowing hydrogen strategy; HETEROCYCLIC CARBENE; BORROWING HYDROGEN; BETA-ALKYLATION; SECONDARY ALCOHOLS; BOND ACTIVATION; RUTHENIUM CATALYSTS; IRIDIUM COMPLEX; AMINATION; DEHYDROGENATION; TERTIARY;
D O I
10.1002/ejic.201900191
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A series of unsymmetrical 1,3-disubstituted benzimidazolium chlorides were synthesized as N-heterocyclic carbene (NHC) precursors. These compounds were used for synthesis of the new ruthenium(II) complexes of the type [RuCl2(arene)(NHC)], (arene = eta(6)-p-cymene). The structures of all compounds were characterized by H-1 NMR, C-13 NMR and FT-IR spectroscopy techniques. The catalytic activity of the ruthenium complexes has been evaluated with respect to the mono-N-alkylation reactions of aromatic amines with various alcohol derivatives under solvent-free conditions at 120 degrees C using the borrowing hydrogen strategy.
引用
收藏
页码:2598 / 2606
页数:9
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