Mg for B: An atom-economical one-pot synthesis by direct magnesium insertion in the presence of B(OBu)3 and LiCl allows a broad range of functionalized (hetero)aryl and alkenyl bromides to be converted into magnesium diorganoboronates 2, which undergo Suzuki–Miyaura cross-coupling reactions with various aryl (pseudo)halides (see scheme). Both aryl groups of 2 are transferred and furnish the products in good to excellent yields.
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Haag et al. (2011) studied this question.
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