Copper-Phosphine Supported Fe3O4@SiO2 as a Novel Reusable Nanocatalyst-Catalyzed Tandem Reaction of Indole and Alcohols to Bis(indolyl)methanes under Blue LED Light

摘要

Nano Fe3O4@SiO2@TPP-Cu as a novel heterogeneous nano- catalyst was prepared and authenticated by usual analytical and spectroscopic techniques. The prepared Fe3O4@SiO2@TPP-Cu was applied to preparation of bis(indolyl) methane derivatives via a three-component reaction of aromatic alcohols with indoles under blue led lights. The advantages of this method are the selective oxidation of alcohols under mild conditions. In addition, the recycling studies revealed that catalyst could be easily recovered using an external magnet and reused for five times without significant loss of its catalytic activity.