Royal Society of Chemistry, Chemical Communications, 87(53), p. 11945-11947
DOI: 10.1039/c7cc07371b
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CuOTf-mediated intramolecular diborene hydroarylation, followed by a σ-bond metathesis between the resulting B–H bond and CuOTf, gives a cyclic sp2–sp3 boryl-substituted boronium triflate.