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  • Regiocontrolled Direct C−H ...
    Yang, Youqing; Gao, Pan; Zhao, Yue; Shi, Zhuangzhi

    Angewandte Chemie International Edition, March 27, 2017, Letnik: 56, Številka: 14
    Journal Article

    An effective and practical strategy has been established for the direct and site‐selective arylation of indoles at the C4 and C5 positions with the aid of a readily accessible, cheap, and removable pivaloyl directing group at the C3 position. This transformation shows good functional‐group tolerance and could serve as a powerful synthetic tool for the synthesis of medicinally relevant compounds. This method and those developed in previous research together enable the regiocontrolled direct arylation of indole at each C−H bond without prefunctionalization of the reactive sites. Grand Slam: An effective and practical strategy has been established for the direct site‐selective arylation of indoles at the C4 or C5 position (see scheme) by the use of a readily available and removable pivaloyl directing group (DG) at the indole C3 position. Now the direct site‐selective arylation of indoles at any given C−H bond is possible by the appropriate choice of this or a previously developed complementary method.