Cobalt-catalyzed C-H borylation

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[1] Obligacion, Jennifer V.
[2] Semproni, Scott P.
[3] Chirik, Paul J.
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Chirik, P.J. (pchirik@princeton.edu) | 1600年 / American Chemical Society卷 / 136期
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A family of pincer-ligated cobalt complexes has been synthesized and are active for the catalytic C-H borylation of heterocycles and arenes. The cobalt catalysts operate with high activity and under mild conditions and do not require excess borane reagents. Up to 5000 turnovers for methyl furan-2-carboxylate have been observed at ambient temperature with 0.02 mol % catalyst loadings. A catalytic cycle that relies on a cobalt(I)-(III) redox couple is proposed. © 2014 American Chemical Society;
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