Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (6): 1899.doi: 10.7503/cjcu20200803

• Physical Chemistry • Previous Articles     Next Articles

Reaction Mechanism for Rh(Ⅱ)-catalyzed [3+3] Cyclization of Indole Derivatives and Propertis of Product

TIAN Shengqiao, WEI Meiju()   

  1. Department of Chemistry and Chemical Engineering,School of Chemitry and Biological Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • Received:2020-11-10 Online:2021-06-10 Published:2021-06-08
  • Contact: WEI Meiju E-mail:weimeiju@ustb.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21873011)

Abstract:

The density functional theory was used to study the [3+3] internal cyclization of 3-diazoindolin-2-imide and 2H-azirine catalyzed by dirhodium. The reaction mainly involved the formation of rhodium metal carbene, activation cleavage of C―N bond, and indole [3+3] internal cyclization. The calculation results showed that the rhodium catalyst showed coupling effects to promote C-N coupling and 2H-azirine C―N bond cleavage. The reaction rate-controlled step was occurred during the indole [3+3] cyclization. The rhodium catalyst was released before the [3+3] cyclization. One product had a lower hole recombination energy and a large Stokes shift in the absorption and fluorescence emission spectra, which showed that it could be good hole transport material and fluorescent emission material.

Key words: 3-Diazoindolin-2-imine, Reaction mechanism, 2H-Azirine, [3+3] Cyclization, Rhodium catalysis

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