Abstract
AbstractAn iridium(I) complex generated from 1/2[Ir(OMe)(COD)]2 and 4,4′‐di‐tert‐butyl‐2,2′‐bipyridine catalyzed the direct borylation of 2‐substituted thiophenes, furans and pyrroles in stoichiometric amounts relative to bis(pinacolato)diboron in hexane at room temperature. The heteroarylboronates from regioselective CH activation at the 5‐position were formed in high yields. Similar borylations of unsubstituted heteroarenes with an equimolar amount of the diboron regioselectively provided 2,5‐bis(boryl)heteroarenes.
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