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[RhIIICp*]-Catalyzed Dehydrogenative Aryl[BOND]Aryl Bond Formation


  • We thank Nadine Kuhl for discussions, Dr. Klaus Bergander for special NMR experiments, and Dr. Heinrich Luftmann for help with MS analyses. This work was supported by the European Research Council under the auspices of the European Community’s Seventh Framework Program (FP7 2007-2013)/ERC Grant agreement no. 25936 and the Alexander von Humboldt Foundation (F.P.). The research of F.G. has been supported by the Alfried Krupp Prize for Young University Teachers of the Alfried Krupp von Bohlen und Halbach Foundation.


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Directed, undirected! Rhodium(III)-catalyzed double CH bond activation (one directed, one undirected) provides an efficient route to biaryls (see scheme; DG=directing group). Significant kinetic isotope effects for both reaction partners and H/D scrambling between them are interesting experimental findings. While the mechanism is still unclear, a rhodium(V) species is invoked in the catalytic cycle.