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Synthesis and Characterization of New Chiral Azolinium Salts, Precursors to N-heterocyclic Carbenes, Derived from L-proline
Published: 31 October 2014 by MDPI in The 18th International Electronic Conference on Synthetic Organic Chemistry session Ionic Liquids
Abstract: A short and flexible procedure for the preparation of 7 chiral azolinium and 5 functionalized chiral azolinium salts, precursors to N-heterocyclic carbenes, derived from L-proline has been developed. Moderate to good overall yields were obtained. Some NHC dimers and thiones were isolated. X-ray structure determinations of two [Rh-NHC] complexes were also reported.
Keywords: Azolinium salts; N-heterocyclic carbene; L-proline; microwave activation