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A method for practical preparation of pinacolborane from borane-diethylaniline and pinacol was newly developed. Aromatic C–H borylation of arenes with pinacolborane or bis(pinacolato)diboron catalyzed by 1/2[Ir(OMe)(COD)] 2 -(4,4′-di-tert-butyl-2,2′-bipyridine) at 25°C in hexane to give arylboronic esters was directly followed by cross-coupling with aromatic bromides at 60°C in the presence...
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