“…Sharpless et al reported [3 + 2]-cycloaddition reaction of nitrile group with sodium azide for synthesis of tetrazoles (Demko and Sharpless 2001). Also the tetrazole synthesis was carried out by using catalysts such as, Lewis acids (Kumar et al 1996), zinc (II) salts, Cu 2 O, ZnO (Kantam et al 2005) (Zarchi and Abadi 2019), nanoparticles (Sreedhar et al 2011). These reported procedures have several drawbacks such as toxic metals, harsh reaction conditions, use of strong Lewis acids, water sensitivity, extended reaction time, difficulty in isolation and recovery of the catalysts.…”