Use of an electron-reservoir complex together with air to generate N-heterocyclic carbenes.
Imidazolium salts with suitable substituents are readily deprotonated to stable NHC carbenes using the electron-reservoir complex [FeICp(eta6-C6Me6)], 1, in the presence of air (via a superoxide radical anion acting as a base). Less stable NHC carbenes can be conveniently obtained from imidazolium salts using the neutral base [FeIICp(eta5-C6Me5CH2)] obtained from 1 and air.
Méry
Denise
D
LCOO, UMR CNRS No. 5802, Université Bordeaux 1, 351, Cours de la Libération, 33405 Talence Cedex, France.
Aranzaes
Jaime Ruiz
JR
Astruc
Didier
D
D004583:Electrons; D006571:Heterocyclic Compounds / Q000737:chemistry*; D006838:Hydrocarbons / Q000737:chemistry; D008697:Methane / Q000031:analogs & derivatives* / Q000737:chemistry; D010084:Oxidation-Reduction
D006571:Heterocyclic Compounds; D006838:Hydrocarbons; C030011:carbene; D008697:Methane