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Design of C1-symmetric tridentate ligands for enantioselective dearomative [3 + 2] annulation of indoles with aminocyclopropanes

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  • Hai-Xia Wang

    (Henan Normal University)

  • Chun Yang

    (Henan Normal University)

  • Bai-Yu Xue

    (Henan Normal University)

  • Ming-Sheng Xie

    (Henan Normal University)

  • Yin Tian

    (Chengdu University of Traditional Chinese Medicine)

  • Cheng Peng

    (Chengdu University of Traditional Chinese Medicine)

  • Hai-Ming Guo

    (Henan Normal University)

Abstract

Chiral polycyclic indolines are widely present in natural products and have become the focus of extensive synthetic efforts. Here, we show the catalytic asymmetric dearomative [3 + 2] annulation of indoles with donor-acceptor aminocyclopropanes to construct tricyclic indolines. Key to the success of the reaction is the rational design of C1-symmetric bifunctional tridentate imidazoline-pyrroloimidazolone pyridine ligand. Under 5 mol% of Ni(OTf)2-ligand complex, diverse tricyclic indolines containing cyclopentamine moieties are obtained in good chemoselectivities, high diastereoselectivities, and excellent enantioselectivities. An unusual cis-configuration ligand is superior to the trans-configuration ligand and the corresponding C2-symmetric tridentate nitrogen ligands in the annulation reaction. Mechanistic studies by control experiments and density functional theory calculations reveal a dual activation manner, where Ni(II) complex activates the aminocyclopropane via coordination with the geminal diester, and imidazolidine NH forms a H-bond with the succinimide moiety.

Suggested Citation

  • Hai-Xia Wang & Chun Yang & Bai-Yu Xue & Ming-Sheng Xie & Yin Tian & Cheng Peng & Hai-Ming Guo, 2023. "Design of C1-symmetric tridentate ligands for enantioselective dearomative [3 + 2] annulation of indoles with aminocyclopropanes," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
  • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38059-7
    DOI: 10.1038/s41467-023-38059-7
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    Cited by:

    1. Wen-Biao Wu & Bing Xu & Xue-Chun Yang & Feng Wu & Heng-Xian He & Xu Zhang & Jian-Jun Feng, 2024. "Enantioselective formal (3 + 3) cycloaddition of bicyclobutanes with nitrones enabled by asymmetric Lewis acid catalysis," Nature Communications, Nature, vol. 15(1), pages 1-9, December.

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