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Selective Synthesis of Phenanthrenes and Dihydrophenanthrenes via Gold-Catalyzed Cycloisomerization of Biphenyl Embedded Trienynes

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journal contribution
posted on 24.09.2020, 13:07 by Ana Milián, Patricia García-García, Adrián Pérez-Redondo, Roberto Sanz, Juan J. Vaquero, Manuel A. Fernández-Rodríguez
Readily available o′-alkenyl-o-alkynylbiaryls, a particular type of 1,7-enynes, undergo a selective cycloisomerization reaction in the presence of a gold­(I) catalyst to give interesting phenanthrene and dihydrophenanthrene derivatives in high yields. The solvent used provokes a switch in the evolution of the gold intermediate and plays a key role in the reaction outcome.

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