A variety of functionalized arylboronates are obtained in moderate to excellent yield by a one-step chemical procedure from the corresponding halides and a haloboronic ester via an intermediate arylzinc species.
A new chemical method is described for the preparation of aryl or thienyl zinc intermediates from their corresponding aromatic or thienyl chlorides in a mixture of acetonitrile-pyridine, using cobalt catalysis. This procedure allows for the synthesis of a variety of functionalized arylzinc species from reactive arylchlorides or chlorothiophenes in good to excellent yields. Some of these arylzinc compounds have been coupled with aromatic bromides using palladium catalysis.
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