Oxazolones are five-membered heterocyclic compounds with oxygen and nitrogen included as hetero atoms. The C-2 and C-4 positions are vital as they play an important role in biological and pharmacological interactions. Compounds with many reaction sites are obtained by binding different substituents at the mentioned sites. N-substituted oxazolones also participate in various intermolecular reactions. They are vital elements in the synthesis of diverse pharmaceutical agents and biologically active compounds. Due to these properties, there is much interest in this small heterocyclic structure as a target group of compounds to evaluate many pharmacological effects such as antimicrobial, pesticidal, inhibitory, anticancer, antidiabetic and anti-inflammatory. In this thesis, I will focus on the mechanism of oxazolone formation, different forms of synthesis and pharmacological activities of the synthesized compounds.
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