synthesis of 3-amino -4-imino-7-methyl -2-N-(substituted) pyrazolo [3,4-b] thiazolo [1,2-a] pyrimidine (5A.17a-i) have
been reported by condensing 6-cyano-5-imino-2-methyl-7-(methylthio)-5H-thiazolo [3,2-a] pyrimidine with hydrazine and its
various derivatives. The chemical structure of the product was proved on the basis of their spectal IR, 1H-NMR, 13C-NMR,
Mass and analytical studies. Some of the newly synthesized compounds have been screened for antimicrobial and antioxidant
activity.