Fe3O4@Zeolite‐Y Functionalized with N‐Methylimidazolium Ionic Liquid: Design and Performance as a New Recyclable and Magnetically Nanocatalyst in the Three‐Component Synthesis of N‐Heterocyclic‐1,3‐thiazolidinones

The new 1-MeIm IL@ZY-Fe₃O₄ nanoporous has perfectly constructed through a green, straightforward and co-precipitation procedure. Then, it was employed as a magnetically, reusable and bi-functional nanocatalyst for the three-component synthesis of 3-benzimidazolyl (or benzothiazolyl)-1,3-thiazolidin-4-one derivatives in the short reaction times (15–21 min) with excellent yields (87–96 %) under mild conditions.

Abstract

In this research, first, nanoporous zeolite-NaY was functionalized with 3-chloropropyltriethoxysilane (organic linker) and then N-methylimidazole group. Then magnetic nanoparticles (Fe₃O₄) under ultrasonic energy conditions on the surface and internal pores of zeolite-Y (1-MeIm IL@ZY-Fe₃O₄) were formed. The identification, confirmation of the structure and morphology of the prepared magnetic nanohybrid was done by using FTIR, FESEM, TEM, EDX, TGA, XRD, VSM and BET instrumental techniques. Next, its catalytic performance in the synthesis of a number of 3-benzimidazolyl (or benzothiazolyl)-1,3-thiazolidin-4-one derivatives was investigated through the three-component condensation reaction of various aromatic aldehydes, 2-aminobenzimidazole or 2-aminobenzothiazole, and thioglycolic acid in EtOH at room temperature. The results of the experiments show that the presence of magnetic nanoparticles (Fe₃O₄) inside the pores of zeolite functionalized with ionic liquid not only causes easy and quick separation of the nanocatalyst by an external magnetic field but also can be effective in catalyzing the reaction as a Lewis acid.

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