Ferrocene-appended anionic N-heterocyclic carbene and its complex with silver(I): Synthesis, structure and catalytic evaluation

Abstract

1072-1077A binuclear Ag(I) complex (1) bridged by two anionic N-heterocyclic carbene (NHC) ligands <span style="mso-ansi-language: DE;mso-bidi-font-weight:bold" lang="DE">ferrocenoyl(1-mesityl-imidazol-2-ylidine-3-yl)amide is synthesized. X-ray structure reveals a [Ag<span style="mso-fareast-font-family: " ms="" mincho";mso-ansi-language:de;mso-fareast-language:ja"="" lang="DE">···Ag] core spanned by two ligands, each bridging two metals through carbene carbon and amido nitrogen. The neutral complex (<b style="mso-bidi-font-weight: normal">1) is highly soluble in a variety of organic solvents and is thermally stable. Complex (1) efficiently catalyses aniline-mediated synthesis of substituted quinolines from 2-aminobenzaldehyde and terminal alkynes. </span