Chinese Journal of Catalysis ›› 2020, Vol. 41 ›› Issue (11): 1723-1733.DOI: 10.1016/S1872-2067(20)63587-2

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Rhodium(III)-catalyzed chelation-assisted C-H imidation of arenes via umpolung of the imidating reagent

Guangfan Zhenga,c, Jiaqiong Suna, Youwei Xuc, Xukai Zhoua, Hui Gaob, Xingwei Lia,c   

  1. a Key Laboratory of Applied Surface and Colloid Chemistry of MOE&School of Chemistry and Chemical Engineering Shaanxi Normal University(SNNU), Xi'an 710062, Shaanxi, China;
    b Key Laboratory of Molecular Target and Clinical Pharmacology, School of Pharmaceutical Sciences&Fifth Affiliated Hospital, Guangzhou Medical University, Guangzhou 511436, Guangdong, China;
    c Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
  • Received:2020-02-27 Revised:2020-03-30 Online:2020-11-18 Published:2020-08-15
  • Supported by:
    We acknowledge financial support from NSFC (21525208), China Postdoctoral Science Foundation (2019TQ0192, 2019M653531, 2019M663613), and Fundamental Research Funds for the Central Universities (GK201903028) and SNNU.

Abstract: Rh(III)-catalyzed, chelation-assisted oxidative C-H imidation of arenes with N-H imide have been realized using PhI(OAc)2 as an oxidant. This transformation exhibits a broad substrate scope and tolerates various functional groups. The reaction proceeded via in situ generation of an iodine(III) imido. DFT calculations suggest that this oxidative imidaton system proceeds via a Rh(III)-Rh(V)-Rh(III) pathway.

Key words: Aryl amines, Rh(III) catalysis, Oxidative C-H imidation, Hypervalent iodine regent, Umpolung