Chinese Journal of Catalysis ›› 2018, Vol. 39 ›› Issue (12): 1881-1889.DOI: 10.1016/S1872-2067(18)63154-7

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Co(III)/Zn(II)-catalyzed dearomatization of indoles and coupling with carbenes from ene-yne ketones via intramolecular cyclopropanation

Na Lia,b, Junbiao Changa, Lingheng Kongc, Shuangjing Wanga, Dandan Wanga, Miao Chenga, Xingwei Lia,c   

  1. a Henan Key Laboratory of Organic Functional Molecule and Drug Innovation, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang 453007, Henan, China;
    b School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, Henan, China;
    c Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2018-06-21 Revised:2018-07-26 Online:2018-12-18 Published:2018-09-26
  • Contact: 10.1016/S1872-2067(18)63154-7
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (21525208, 21472186) and the research fund from Henan Normal University (5101034011009).

Abstract:

A straightforward and efficient protocol for dearomatizing indoles is described. The reaction, catalyzed by an inexpensive Co(Ⅲ)/Zn(Ⅱ) catalyst, starts from easily accessible N-pyrimidinyl indoles and ene-yne ketones. Mild reaction conditions, high diastereoselectivity, a broad substrate scope, effective functional group tolerance, and reasonable to remarkable yields were observed.

Key words: Co(III)/Zn(II) catalysis, Dearomatization, Cyclopropanation, Carbene, Indole