Carbene catalyzed umpolung of α,β-enals: a reactivity study of diamino dienols vs. azolium enolates, and the characterization of advanced reaction intermediates

• DOI: 10.1039/c5sc01027f
• Publication Date: 2015-04-30T14:30:56Z
• Authors: Veera Reddy Yatham; Jörg-M. Neudörfl; Nils E. Schlörer; Albrecht Berkessel
• Keywords: Umpolung; Reactivity; Characterization

NMR/X-ray evidence is provided for hitherto postulated reactivity patterns of homoenolate <italic>vs.</italic> azolium enolate intermediates in NHC-catalyzed umpolung enals.