Highly Efficient One-Pot Access to Functionalized Arylboronic Acids via Noncryogenic Bromine/Magnesium Exchanges

[摘要]：A general and convenient protocol for the electrophilic borylation of aryl Grignard reagents prepared from arylbromides by direct insertion of magnesium in the presence of LiCl or by Mg/Br exchange with (l)PrMgCl center dot LiCl has been developed. Various aryl boronic acids were synthesized in a straightforward manner in excellent yields at 0 degrees C.

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