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Pyrazolidine-3,5-dione (PZD) derivatives have emerged as a class of compounds with notable pharmacological potential, drawing significant interest due to their broad range of therapeutic applications. This review consolidates data spanning from 1953 to 2004, providing a comprehensive overview of their synthesis, biological activities, and mechanisms of action while underscoring their diverse therapeutic promise. The synthesis of PZD derivatives has evolved with the use of advanced methodologies such as reactions with malonic acid, substituted hydrazines, benzothiazoles, and aryl aldehydes, along with modern techniques like microwave-assisted reactions and solid-phase synthesis, which enhance efficiency and promote structural diversity. These derivatives exhibit a wide array of pharmacological activities, including anti-inflammatory, analgesic, antipyretic, antimicrobial, anticancer, antidiabetic, and neuroprotective effects, highlighting their versatile therapeutic potential. Furthermore, PZD derivatives demonstrate efficacy as insecticides, miticides, and herbicides, suggesting their relevance in agricultural applications. The mechanisms of action behind their therapeutic effects include the inhibition of critical enzymes involved in amino acid biosynthesis and cell wall formation in microorganisms, as well as modulation of receptors, such as PPARγ and the Farnesoid X receptor. Several PZD derivatives also exhibit significant antimicrobial, antifungal, and antitubercular properties, positioning them as potential candidates for the treatment of bacterial and fungal infections. Additionally, some derivatives have shown promise as anticonvulsants, Dyrk1A inhibitors, and enhancers of Mycobacterium tuberculosis sensitivity to antimicrobials, demonstrating their broad therapeutic versatility. Despite the promising pharmacological activities, further research is required to optimize the pharmacokinetic profiles of PZD derivatives, minimize potential side effects, and expand their clinical applications. This work will be essential in advancing PZD derivatives as effective treatments for a range of diseases, making them valuable candidates for future drug development.
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