Many current methods to prepare 2-hydroxybiaryls require the prefunctionalization of phenol groups or show limited substrate scope. Now, use of a pentavalent sulfone-bridged bismacycle, formed in situ by telescoped boron-to-bismuth transmetallation and oxidation, allows the direct and regioselective ortho-arylation of unprotected phenols.
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Le Roch, A., Gagnon, A. Heavy metal orchestration. Nat. Chem. 12, 223–224 (2020). https://doi.org/10.1038/s41557-020-0434-3
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DOI: https://doi.org/10.1038/s41557-020-0434-3
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