Organocatalysis Meets Visible Light Meets Carbon Monoxide
Only very recently, photocatalysis in the presence of visible light was introduced as a new reaction concept to C–C formations which commonly would have been forged by Pd-catalyzed Suzuki or Stille reactions. Such visible-light-driven reactions with metal-free organic dye catalysts (such as eosin Y) use arenediazonium salts as good electrophiles and electron-rich arenes as nucleophilic coupling partners although the mechanism involves single-electron redox steps. The group of Professor Axel Jacobi von Wangelin from the University of Regensburg (Germany) developed a new carbonylation procedure that excludes the use of metal, ligand, and base.
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