4.3 Article

12-Tungstophosphoric Acid Immobilized on γ-Fe2O3@SiO2 Core-Shell Nanoparticles: An Effective Solid Acid Catalyst for the Synthesis of Indole Derivatives in Water

Journal

CHEMISTRY LETTERS
Volume 41, Issue 4, Pages 438-440

Publisher

CHEMICAL SOC JAPAN
DOI: 10.1246/cl.2012.438

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Funding

  1. Razi University Research Council
  2. Iran National Science Foundation (INSF)

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12-Tungstophosphoric acid immobilized on gamma-Fe2O3@SiO2 core shell nanoparticles was used as novel solid acid catalyst for the synthesis of various bis(indolyl)methanes and beta-functionalized indoles in water. The catalyst can be recovered simply using an external magnetic field and reused several times without appreciable loss of its catalytic activity.

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