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Iridium complexes generated from [Ir(OMe)(COD)](2) and tris[3,5-bis(trifluoromethyl)phenyl]phosphine efficiently catalyzed the ortho-C-H borylation of benzoate esters with bis(pinacolato)diboron in octane at 80 degrees C to produce the corresponding arylboronates in high yields with excellent regioselectivities.
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Ishiyama et al. (2009) studied this question.
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