有机化学 ›› 2022, Vol. 42 ›› Issue (7): 2192-2200.DOI: 10.6023/cjoc202203017 上一篇    下一篇

研究论文

氰甲基导向的吲哚选择性C—H烯基化

闫法超a,b, 李洋a,b, 李玉东a, Mohamed Makhaa, 李跃辉a,*()   

  1. a中国科学院兰州化学物理研究所苏州研究院 羰基合成与选择氧化国家重点实验室 兰州 730000
    b中国科学院大学 北京 100049
  • 收稿日期:2022-03-06 修回日期:2022-03-22 发布日期:2022-08-09
  • 通讯作者: 李跃辉
  • 作者简介:
    共同第一作者
  • 基金资助:
    国家自然科学基金(22022204); 国家自然科学基金(21633013); 国家自然科学基金(22072167)

Ru(II)-Catalyzed Regioselective C—H Alkenylation of Indoles Using Cyanomethyl Directing Group

Fachao Yana,b, Yang Lia,b, Yudong Lia, Mohamed Makhaa, Yuehui Lia()   

  1. aState Key Laboratory for Oxo Synthesis and Selective Oxidation, Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences, Lanzhou 730000
    bUniversity of Chinese Academy of Sciences, Beijing 100049
  • Received:2022-03-06 Revised:2022-03-22 Published:2022-08-09
  • Contact: Yuehui Li
  • About author:
    These authors contributed equally to this work
  • Supported by:
    the National Natural Science Foundation of China(22022204); the National Natural Science Foundation of China(21633013); the National Natural Science Foundation of China(22072167)

首次利用氰甲基作为导向基团, 在钌(II)催化下实现了吲哚及其衍生物C(2)位C—H的选择性烯基化反应, 制备得到了一系列具有潜在应用价值的吲哚C(2)-烯基化产物. 该反应条件温和, 并表现出较好的底物普适性和官能团兼容性, 酯基、氰基、碘、溴、氟和三氟甲基等均被较好地兼容. 该导向基团可以在相对温和的条件下方便地移除, 生成 N—H吲哚类化合物.

关键词: 钌催化, 选择性C(2)烯基化, 吲哚, 氰甲基导向, C—H官能团化

A ruthenium-catalyzed C(2)-alkenylation of indole derivatives by employing cyanomethyl as the directing group was developed for the first time. Site-selective alkenylation was achieved for a broad scope of alkenes as coupling partners with a large number of indoles bearing synthetically useful functional groups. The protocol represents a novel method for C(2)-alkenylation of indoles affording biologically relevant indolic compounds. The reaction conditions were mild and it showed good substrate scope and functional group compatibility. Ester group, cyano group, iodine, bromine, fluorine and trifluoromethyl were all well compatible. The directing group can be easily removed under relatively mild conditions to form N—H indoles.

Key words: Ru(II)-catalysis, C(2)-alkenylation, indole, cyanomethyl directing group, C—H bond functionalization