A SIMPLE, EFFICIENT AND GREEN PROCEDURE FOR THE SYNTHESIS OF 2, 4, 5-TRISUBSTITUTED IMIDAZOLE DERIVATIVES USING NOVEL PEG-SOCl AS A CATALYST

A facile, highly efficient, simple, and convenient method for synthesizing 2, 4, 5-trisubstituted imidazole derivatives from the condensation of various substituted benzaldehyde, benzil, and ammonium acetate by using a catalytic amount of PEG-SOCl in the presence of water at room temperature or under microwave irradiation. PEG-SOCl is an effective heterogeneous catalyst and easy to separate. We have investigated that PEG-SOCl catalytic system was excellent recycled and reused three times without any loss of catalytic activity. PEG-SOCl act as a green catalyst, low-cost, non-volatile, non-hazardous, environmental friendly catalyst, and water is a green solvent reaction carried out at room temperature or under microwave radiation method shows greater advantages because it has contributed in the green chemistry aspects. The prepared catalyst was analyzed by analytical methods such as infrared spectrum (IR), X-Ray diffraction pattern (XRD), thermo-gravimetric analysis (TGA), and BET surface analysis. Spectroscopic techniques identified the synthesized pure product (1j), including infra-red (IR) spectrum, ¹H and ¹³C NMR spectrum and Mass (LC-MS) spectrometry.