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Abstract
Herein, we disclose the gold-catalyzed annulation reaction of 2-iodobiphenyls with alkynes, leading to the formation of phenanthrene derivatives. The crucial aspect of this reaction lies in the catalytic migratory insertion of alkynes into the Au(III)‒C bonds. Experimental results suggest a preference for the migratory insertion pathway over the π-activation pathway, a finding further supported by Density Functional Theory (DFT) calculations.
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