Amine‐Triggered 6π‐Electrocyclization–Aromatization Cascade of Ynedienamines
作者： Xijian Li , Huidong Yu , Yong Huang
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摘要: An unprecedented 6π-electrocyclization–aromatization cascade reaction of ynedienamines is described. The electron-rich ynedienamine converted by γ-protonation to an electrophilic allenyl iminium species which susceptible amine addition generating a highly triene intermediate. 6π-electrocyclization accelerated three electron-donating substituents in captodative manner. Subsequent redox-neutral aromatization allows the direct synthesis 1,3-diaminobenzenes from readily available ynedienamines.
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