Efficient Synthesis of Aryl Boronates via Zinc-Catalyzed
Cross-Coupling of Alkoxy Diboron Reagents with Aryl Halides at Room
Temperature
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Abstract
A zinc(II)/NHC system
catalyzes the borylation of aryl halides
with diboron (4) reagents in the presence of KOMe at rt. This transformation
can be applied to a broad range of substrates with high functional
group compatibility. Radical scavenger experiments do not support
a radical-mediated process