期刊
JOURNAL OF ORGANOMETALLIC CHEMISTRY
卷 694, 期 12, 页码 1861-1868出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2009.01.036
关键词
Chiral bisimidazolium salts; Amino acids; N-heterocyclic carbene metal complexes; Palladium; Platinum; Solid state structure
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.
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