Rh/Cu‐Catalyzed Cascade [4+2] Vinylic C−H O‐Annulation and Ring Contraction of α‐Aryl Enones with Alkynes in Air
作者： Yinsong Zhao , Shiqing Li , Xuesong Zheng , Junbin Tang , Zhijie She
关键词: Stereochemistry 、 Furan 、 Aryl 、 Medicinal chemistry 、 Chemistry 、 Contraction (grammar) 、 Annulation 、 Pyrylium salt 、 Catalysis
摘要: An unprecedented Rh-catalyzed ketone-directed vinylic C−H activation/[4+2] O-annulation of α-aryl enones with internal alkynes followed by a Cu-catalyzed ring contraction in air to provide multiaryl-substituted furan derivatives has been developed. The preliminary mechanism study identifies the active pyrylium salt as key intermediate.
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