title: Synthesis of 4- and 4,5-functionalized imidazol-2-ylidenes from a single 4,5-unsubstituted imidazol-2-ylidene.
abstract: Using the nucleophilicity of NHCs and aNHCs, as well as the leaving group ability of the former, the carbon-carbon double bond of imidazol-2-ylidenes can be readily mono- and difunctionalized. These results provide also a new light on the formation of abnormal carbene adducts from classical unsaturated NHCs.
authors.affiliation: UCR-CNRS Joint Research Chemistry Laboratory (UMR 2282), Department of Chemistry, University of California, Riverside, California 92521-0403, USA.
authors.forename: Daniel
authors.initials: D
authors.lastname: Mendoza-Espinosa
authors.forename: Bruno
authors.initials: B
authors.lastname: Donnadieu
authors.forename: Guy
authors.initials: G
authors.lastname: Bertrand
mesh_terms: D006571:Heterocyclic Compounds / Q000138:chemical synthesis*; D007093:Imidazoles / Q000138:chemical synthesis*; D008697:Methane / Q000031:analogs & derivatives* / Q000138:chemical synthesis
chemical_list: D006571:Heterocyclic Compounds; D007093:Imidazoles; C030011:carbene; D008697:Methane