Abstract

A series of 8 H-7-(substituted aryl)-3-(4-methylthiobenzyl)-1,3,4-thiadiazino[2,3- c]-1,2,4-triazin-4-ones ( 4 ) were synthesized in good yield by condensing 4-amino-6-(4-methylthiobenzyl)-3-mercapto-1,2,4-triazin-5(4 H)-one 1 with various substituted phenacyl bromides (2) in presence of anhydrous sodium acetate, followed by the cyclization of the intermediate triazinone derivatives (3) in presence of concentrated sulphuric acid. The structures of the newly synthesized compounds were formulated on the basis of elemental analysis, IR, 1H NMR and mass spectral studies. The newly synthesized compounds were tested for their in vitro antibacterial and antifungal activity against a variety of microorganisms.

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