Microwave Induced Synthesis of 1,2,4-triazole derivatives and Study of their Anthelmintic and Anti-microbial Activities

Abstract

Microwave-assisted chemical reactions are utilized as an emerging tool in drug synthesis as this technique is simple, economic, and efficient. So, a new series of 1,2,4-triazole derivatives are obtained via multi-component reactions under microwave irradiation. First of all, benzohydrazide was obtained by esterification of benzoyl chloride with methanol in presence of concentrated sulphuric acid followed by reaction with hydrazine hydrate. So, carbon disulfide was added dropwise to benzohydrazide in ethanolic potassium hydroxide solution to yield potassium dithiocarbazinate which was cyclized by reacting with hydrazine hydrate to afford 1,2,4-triazole-3-thiol. Further, various Schiff’s bases were prepared by reacting 1,2,4-triazole-3-thiol with different substituted benzaldehydes under microwave irradiations. The characterization of the newly synthesized triazole derivatives were carried out by spectral studies including FT-IR, 1H-NMR, and LC-MS. The tested compounds exhibited significant in-vitro anthelmintic and antimicrobial activities as compared to the standard drugs.