Fe₃O₄/SO₃H@zeolite-Y as a novel multi-functional and magnetic nanocatalyst for clean and soft synthesis of imidazole and perimidine derivatives

Abstract

In this study, SO 3 H@zeolite-Y was synthesized by the reaction of chlorosulfonic acid with zeolite-NaY under solvent-free conditions, which was then supported by Fe 3 O 4 nanoparticles to give SO 3 H@zeolite-Y (Fe 3 O 4 /SO 3 H@zeolite-Y) magnetic nanoparticles. Several techniques were used to evaluate the physical and chemical characterizations of the zeolitic nanostructures. Fe 3 O 4 -loaded sulfonated zeolite was applied as a novel multi-functional zeolite catalyst for the synthesis of imidazole and perimidine derivatives. This efficient methodology has some advantages such as good to excellent yield, high purity of products, reusability of nanocatalyst, simple reaction conditions, environmental friendliness and an economical chemical procedure from the viewpoint of green chemistry.

Design of a new multi-functional catalytic system Ni/SO3H@zeolite-Y for three-component synthesis ofN-benzo-imidazo- or -thiazole-1,3-thiazolidinones

“…Moreover, the peaks at 1021 and 792 cm À1 are attributed to the symmetric and asymmetric stretching vibrations of the Si-O-Si groups, respectively. 18 In the spectrum of SO 3 -H@zeolite-Y in Fig. 4b, the broad peak at 3407 cm À1 may be attributed to the -OH stretching vibration of the -SO 3 H groups.…”

“…Also, by looking at their hysteresis type, it can be seen that zeolitic structures have slits (layer and layer with high pores) structure and the initial nanostructure aer the functionalize is still retained. 18,39 The hybrid inorganic-organic nanostructure shows a pore size distribution in the range of 2-5.13 nm (Fig. 5c).…”

“…Also, the number of acidic sites in the NZSA obtained 0.26 mmol g À1 using acid-base titration method. 18 This journal is © The Royal Society of Chemistry 2020…”

“…5 Recently, zeolite-Y has been used as the supported surface of bi-functional nanocatalyst. 18 This is very important in synthetic chemistry, that way, the multiple types of active sites can be created on a single nanocatalyst. 19 To the best of our knowledge, there is no example for the synthesis of activated zeolite-NaY by the combination of Ni species and SO 3 H groups in its structure and its catalytic application in the synthesis of heterocycles.…”

Recent Advances in the Synthesis of Perimidines and their Applications

“…A new magnetic nanocatalyst Fe 3 O 4 /SO 3 H@zeolite-Y has been synthesized and used for the preparation of 2-aryl perimidine derivatives by Kalhor and Zarnegar [100]. In this study, the optimization of reaction was carried out using diverse amounts of catalyst in different solvents (H 2 O, EtOH, MeOH, CH 2 CN, CH 2 Cl 2 , and EtOH/H 2 O) at room temperature.…”