Synthesis and Biological Activity of Certain Mannich Bases Derivatives from 1, 2, 4-Triazoles

Abstract

Substituted 1, 2, 4- Triazoles have shown multiple biological activities such as anti-inflammatory, anti fungal, etc. 5-mercapto triazoles were prepared from the potassium dithiocarbazinates. These triazoles were used for preparation of different derivatives by two different schemes. In the first scheme the Mannich bases were prepared from 5- marcapto-s triazole Quinazolines. The 5-Marcato-s-Triazole Quinazolines were synthesized from 5-Marcapto-s-Trizole by reacting with the Quinazoline benzoic acid or acid chlorides. In the second scheme, the synthesis of Quinazolyl Triazolo Thiadiazole Derivatives were prepared by the reaction of Quinazoline benzoic acid and 5-Marcapto-s –Triazoles in POCl₃.All the newly synthesized compound structures were elucidated using various spectral techniques viz. IR, ¹HNMR and screened for <em>in vitro</em> antibacterial and anti fungal activities. Anti bacterial activity was carried out against organisms Bacillus pumilus, Bacillus subtilis, Staphylococcus aureus, and Escherichia coli as well as anti fungal activity were carried out against A.Nigier and C.Albicans. The results substantiated that the synthesized compounds were effective against bacteria, fungi.