Tandem CH Activation/Arylation Catalyzed by Low‐Valent Iron Complexes with Bisiminopyridine Ligands |
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Authors: | Elise Salanouve Ghania Bouzemame Dr Sébastien Blanchard Dr Etienne Derat Dr Marine Desage‐El?Murr Prof Louis Fensterbank |
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Institution: | 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) |
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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. |
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Keywords: | catalysis C H activation iron IR spectroscopy redox‐active ligands |
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