Journal
ADVANCED SYNTHESIS & CATALYSIS
Volume 352, Issue 17, Pages 3001-3012Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adsc.201000472
Keywords
amines; carbene ligands; gold; heterocycles; isonitriles; palladium
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From palladium(II) or platinum(II) bis(isonitrile) complexes and from gold(I) isonitrile complexes, both easily available from simple precursors, the corresponding mono-N-heterocyclic carbene (NHC) complexes could be obtained selectively in good yields under very mild conditions. The reagents are simple beta-chloroammonium salts in the presence of a weak base. Unsymmetric NHC complexes are accessible. Thus over only two steps from simple metal precursors a broad variety of NHC complexes is available, the method is ideal to quickly assemble catalyst libraries. The palladium complexes are active pre-catalysts in Suzuki cross-coupling even with the additional isonitrile ligand on palladium.
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