Pyrimidine is a heterocyclic aromatic organic compound similar to benzene and pyridine, containing two nitrogen atoms at positions 1 and 3 of the six-member ring. Three nucleobases found in nucleic acids, cytosine (C), thymine (T), and uracil (U), are pyrimidine derivatives. A pyrimidine has many properties in common with pyridine, as the number of nitrogen atoms in the ring increases the ring pi electrons become less energetic and electrophilic aromatic substitution gets more difficult while

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... cleophilic aromatic substitution gets easier. Chalcones react with aminoguanidine to give intermediate compounds which on further reacts with substituted ketones to give Pyramidine derivatives. A total of 6 compounds were synthesized from one scheme and they were recrystallized by appropriate solvents. They were identified and characterized by various spectral methods. In the present study, all synthesized compounds tested for anti bacterial activity and anti-fungal activity. They shown significant activity when compared with standard drug Streptomycin and Miconazole respectively. Keywords: Pyramidines, Characterization, Streptomycin, Miconazole, Anti-microbial activity.