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  • Enantioselective Synthesis ...
    Yin, Si‐Yong; Zhou, Qiansujia; Liu, Chen‐Xu; Gu, Qing; You, Shu‐Li

    Angewandte Chemie International Edition, September 11, 2023, Letnik: 62, Številka: 37
    Journal Article

    Enantioselective synthesis of N−N biaryl atropisomers is an emerging area but remains underexplored. The development of efficient synthesis of N−N biaryl atropisomers is in great demand. Herein, the construction of N−N biaryl atropisomers through iridium‐catalyzed asymmetric C−H alkylation is reported for the first time. In the presence of readily available Ir precursor and Xyl‐BINAP, a variety of axially chiral molecules based on indole‐pyrrole skeleton were obtained in good yields (up to 98 %) with excellent enantioselectivity (up to 99 % ee). In addition, N−N bispyrrole atropisomers could also be synthesized in excellent yields and enantioselectivity. This method features perfect atom economy, wide substrate scope, and multifunctionalized products allowing diverse transformations. A highly efficient iridium‐catalyzed asymmetric C−H alkylation reaction is described. A series of structurally diverse indole‐pyrrole and pyrrole‐pyrrole N−N atropisomers were obtained in good yields (up to 98 %) with excellent enantioselectivity (up to 99 % ee). This reaction features perfect atom economy, wide substrate scope, and multifunctionalized products allowing diverse transformations.