Molecules (Jul 2021)

Regioselective Mercury(I)/Palladium(II)-Catalyzed Single-Step Approach for the Synthesis of Imines and 2-Substituted Indoles

  • Rsuini U. Gutiérrez,
  • Mayra Hernández-Montes,
  • Aarón Mendieta-Moctezuma,
  • Francisco Delgado,
  • Joaquín Tamariz

DOI
https://doi.org/10.3390/molecules26134092
Journal volume & issue
Vol. 26, no. 13
p. 4092

Abstract

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An efficient synthesis of ketimines was achieved through a regioselective Hg(I)-catalyzed hydroamination of terminal acetylenes in the presence of anilines. The Pd(II)-catalyzed cyclization of these imines into the 2-substituted indoles was satisfactorily carried out by a C-H activation. In a single-step approach, a variety of 2-substituted indoles were also generated via a Hg(I)/Pd(II)-catalyzed, one-pot, two-step process, starting from anilines and terminal acetylenes. The arylacetylenes proved to be more effective than the alkyl derivatives.

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