Abstract

A REVIEW ON RECENT PROGRESS IN SYNTHESIS AND BIOLOGICAL ACTIVITIES OF THIADIAZOLE AND ITS DERIVATIVES

Saurabh Verma*, Dr. N. Trilochana

Abstract

Thiadiazole and its derivatives constitute an important class of sulfur- and nitrogen-containing heterocyclic compounds that have gained considerable attention in medicinal and pharmaceutical chemistry due to their diverse biological activities and versatile synthetic applicability. Among the various isomeric forms, 1,3,4-thiadiazole derivatives are the most extensively explored because of their favorable pharmacological and physicochemical properties, including aromaticity, metabolic stability, and enhanced lipophilicity. Recent years have witnessed remarkable progress in the development of efficient synthetic methodologies for thiadiazole derivatives, including microwave-assisted synthesis, green chemistry approaches, one-pot multicomponent reactions, solvent-free techniques, and transition-metalcatalyzed cyclization methods. These modern strategies offer improved reaction efficiency, higher yields, reduced reaction time, and environmentally sustainable protocols. Thiadiazole derivatives exhibit a wide spectrum of biological activities such as antimicrobial, anticancer, anti-inflammatory, antitubercular, antiviral, anticonvulsant, and antioxidant effects. Several compounds have demonstrated significant therapeutic potential by acting on multiple molecular targets including enzymes, receptors, and nucleic acids. Structure–activity relationship studies further reveal that substitution patterns on the thiadiazole nucleus greatly influence biological potency and selectivity. Owing to their broad pharmacological profile and synthetic versatility, thiadiazole derivatives continue to serve as promising scaffolds for the discovery and development of novel therapeutic agents. This review highlights recent advances in the synthesis, biological activities, and medicinal significance of thiadiazole derivatives, emphasizing their potential role in future drug discovery and pharmaceutical research.

Keywords: Thiadiazole; 1,3,4-thiadiazole; Heterocyclic compounds; Medicinal chemistry; Green synthesis; Microwave-assisted synthesis; Antimicrobial activity; Anticancer activity; Anti-inflammatory activity.