1,4-Dihydroxyanthraquinone–copper(II) supported on a superparamagnetic Fe3O4@SiO2 catalyst was
employed for the N-arylation of nitrogen heterocycles and alkylamines with aryl halides to afford the
corresponding coupled products in good to excellent yields without using external ligands or additives
as promoters. Also, we have reported this recyclable catalytic system for efficient synthesis of 1-aryl-
1,2,3-triazole derivatives in excellent yields. The desired triazoles were obtained from the reaction of the
corresponding aryl boronic acid derivatives, alkyne, NaN3, and 0.5 mol% catalyst in water/acetonitrile as
the solvent at room temperature without the additional use of an external reducing agent. These
methods show notable advantages such as the heterogeneous nature of the catalyst, low catalyst
loading, easy preparation, excellent yields, short reaction times and simplicity of operation. Also, the
catalyst can be separated from the reaction mixture by applying a permanent magnet externally and can
be reused in six consecutive reaction cycles without significant loss of activity
کلید واژگان :
Fe3O4@SiO2-DAQ-Cu(П) catalyst; N-Arylation; Copper; 1,2,3-Triazoles; Click chemistry; Magnetic separation
