Molecules (Dec 2015)

Syntheses of 4-Indolylquinoline Derivatives via Reductive Cyclization of Indolylnitrochalcone Derivatives by Fe/HCl

  • Wen-Chang Chen,
  • Chan-Chieh Lin,
  • Veerababurao Kavala,
  • Chun-Wei Kuo,
  • Chia-Yu Huang,
  • Ching-Fa Yao

DOI
https://doi.org/10.3390/molecules201219862
Journal volume & issue
Vol. 20, no. 12
pp. 22499 – 22519

Abstract

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An easy and efficient procedure for the synthesis of 4-indolylquinoline derivatives is described. This process involves two steps, the first of which is the Michael addition of indole to nitrochalcones promoted by sulfamic acid under solvent free conditions and the second step is a reductive cyclization of the indolylnitrochalcone intermediates to 4-indolylquinoline derivatives by Fe/HCl in ethanol. In both steps, the reactions are clean and the yields of products are high.

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