Mercury(II) oxide–tetrafluoroboric acid reacts with arenes under mild or very mild conditions to afford, after treatment with iodine in a ‘one-stage’ reaction, the corresponding aryl iodide. The orientation is that expected based on general aromatic substitution theory and hence the meta-iodinated derivatives of deactivated arenes are accessible.
J. Barluenga, P. J. Campos, J. M. González and G. Asensio, J. Chem. Soc., Perkin Trans. 1, 1984, 2623 DOI: 10.1039/P19840002623
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