Abstract
Due to the growing awareness about environmental pollution and environmental legislation, recent years have witnessed a phenomenal increase in the application of microwave irradiation (MW) in organic synthesis. Heterocyclic compounds are abundant in nature and are of great significance to life because their structural subunits exist in many natural products such as vitamins, hormones, and antibiotics; hence, they have attracted considerable attention in the design of biologically active molecules and advanced organic chemistry. The application of molecular diversity technique to drug discovery is a multidisciplinary effort in organic synthesis. Medicinal chemistry concerns with the discovery, development, interpretation and the identification of mechanism of action of biologically active compounds at the molecular level. Encouraged by above reports and as part of our research programme for development of eco-friendly synthetic protocol for biologically active compounds as well as in pursuing of our work on new solvent-free cyclisation here we report the synthesis of aryl-triazalo -1, 3, 4-thidiazoles. The one-pot reaction of mercapto-s-triazole with aromatic acid using AlCl3 as a catalyst under microwave irradiation (2-3 min) and in solvent-free condition gave aryl-triazalo -1, 3, 4-thidiazoles with improved yield is described here.
 Keywords: Aryl-triazalo-1, 3, 4-thiadiazoles, Aromatic acid, AlCl3, cyclisation, S. aureus, E. coli, B. subtilis.
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