title: Tandem C-H activation/arylation catalyzed by low-valent iron complexes with bisiminopyridine ligands.
abstract: Tandem C-H activation/arylation between unactivated arenes and aryl halides catalyzed by iron complexes that bear redox-active non-innocent bisiminopyridine ligands is reported. Similar reactions catalyzed by first-row transition metals have been shown to involve substrate-based aryl radicals, whereas our catalytic system likely involves ligand-centered radicals. Preliminary mechanistic investigations based on spectroscopic and reactivity studies, in conjunction with DFT calculations, led us to propose that the reaction could proceed through an inner-sphere C-H activation pathway, which is rarely observed in the case of iron complexes. This bielectronic noble-metal-like behavior could be sustained by the redox-active non-innocent bisiminopyridine ligands.
authors.affiliation: Sorbonne Universités, UPMC Univ Paris 06, UMR 8232, LabEx MiChem, Institut Parisien de Chimie Moléculaire (IPCM), F-75005, Paris (France), CNRS, UMR 8232, Institut Parisien de Chimie Moléculaire (IPCM), F-75005, Paris (France).
authors.forename: Elise
authors.initials: E
authors.lastname: Salanouve
authors.forename: Ghania
authors.initials: G
authors.lastname: Bouzemame
authors.forename: Sébastien
authors.initials: S
authors.lastname: Blanchard
authors.forename: Etienne
authors.initials: E
authors.lastname: Derat
authors.forename: Marine
authors.initials: M
authors.lastname: Desage-El Murr
authors.forename: Louis
authors.initials: L
authors.lastname: Fensterbank
keywords: CH activation; IR spectroscopy; catalysis; iron; redox-active ligands