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Synlett 2009(14): 2305-2308
DOI: 10.1055/s-0029-1217813
DOI: 10.1055/s-0029-1217813
LETTER
© Georg Thieme Verlag
Stuttgart ˙ New YorkUnexpected Reactions of Push-Pull N-Heterocyclic Carbene Derived from N-(4-Methoxyphenyl)-N-(4-nitrophenyl)-imidazolium Chloride
Further Information
Received
5 May 2009
Publication Date:
07 August 2009 (online)
Publication History
Publication Date:
07 August 2009 (online)

Abstract
A new precursor of N-heterocyclic carbene bearing push-pull substituents has been synthesized by the quaternization of 1-(4-methoxyphenyl)-imidazole. Unexpected reactions between the carbene generated in situ and aromatic aldehydes or acrylates were observed resulting in the formation of imidazole derivatives.
Key words
N-heterocyclic carbenes - nucleophilic addition - aromatic substitution - rearrangements
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References and Notes
CCDC 690599 and CCDC 690600 contain the supplementary crystallographic data for compounds 2a and 3a. These data can be obtained free of charge via www.ccdc.cam.ac.uk/data_request/cif.