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Synthesis 2010(9): 1459-1466  
DOI: 10.1055/s-0029-1218702
PAPER
© Georg Thieme Verlag Stuttgart ˙ New York

Modular Trimethylene-Linked Bisimidazol(in)ium Salts

Michael Bessel, Frank Rominger, Bernd F. Straub*
Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany
e-Mail: straub@oci.uni-heidelberg.de;
Further Information

Publication History

Received 20 November 2009
Publication Date:
12 March 2010 (online)

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Abstract

A short and modular synthesis of symmetrically and nonsymmetrically substituted bisimidazolinylene N-heterocyclic carbene precursors is described. Two methods to establish dicopper(I) complexes of these compounds depending on the steric shielding of the carbene are reported.

Key words

alkylations - copper - carbene complexes - ligands - N-heterocyclic carbenes

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CCDC 768548-768552 contain the supplementary crystallographic data for this paper. These data can be obtained free of charge at www.ccdc.cam.ac.uk/conts/retrieving.html [or from the Cambridge Crystallographic Data Centre, 12 Union Road, Cambridge CB2 1EZ, UK; fax: +44(1223)336033, E-mail: deposit@ccdc.cam.ac.uk].