Aldehyde Umpolung by N-Heterocyclic Carbenes: NMR Characterization of the Breslow Intermediate in its Keto Form, and a Spiro-Dioxolane as the Resting State of the Catalytic System

Berkessel, Albrecht ; Elfert, Silvia ; Etzenbach-Effers, Kerstin ; Teles, J. Henrique

Angewandte Chemie (International ed.), 2010-09, Vol.49 (39), p.7120-7124 [Periódico revisado por pares]

Weinheim: Wiley-VCH Verlag

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