Chiral bisimidazolium salts derived from amino acids and their palladium(II)- and platinum(II)-biscarbene complexes

被引:34
|
作者
Meyer, Anke [1 ]
Taige, Maria A. [1 ]
Strassner, Thomas [1 ]
机构
[1] Tech Univ Dresden, D-01062 Dresden, Germany
关键词
Chiral bisimidazolium salts; Amino acids; N-heterocyclic carbene metal complexes; Palladium; Platinum; Solid state structure; N-HETEROCYCLIC CARBENES; METAL-COMPLEXES; STEREODIRECTING LIGANDS; STRUCTURAL-CHARACTERIZATION; ASYMMETRIC HYDROGENATION; BISCARBENE COMPLEXES; CATALYZED REACTIONS; CONJUGATE ADDITION; IONIC LIQUIDS; METHANE;
D O I
10.1016/j.jorganchem.2009.01.036
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
We report new chiral bisimidazolium salts synthesized from naturally occurring L-amino acids. They served as precursors for bidentate N-heterocyclic carbene metal complexes. The chiral imidazoles could be synthesized in good yields via a one-pot ring closing reaction, followed by esterification. The methylene bridged bisimidazolium iodide salts are accessible in moderate yields. Corresponding palladium(II) and platinum(II)-NHC complexes could be synthesized and fully characterized, but do not show optical activity. We also report a solid state structure of one of the synthesized palladium(II) biscarbene compounds derived from alanine. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:1861 / 1868
页数:8
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