A Scientific Review On: Design of Novel Sulfonamide-Based Pyrazolylpyrazoline Derivatives: Synthesis, Characterization and Anti-Malarial Activity

Abstract

Malaria remains one of the most significant infectious diseases affecting millions of people worldwide, particularly in tropical and subtropical regions. Despite substantial progress in disease control and treatment, the emergence and spread of resistance to conventional antimalarial drugs continue to threaten global malaria eradication efforts. The search for novel therapeutic agents capable of overcoming resistance while maintaining efficacy and safety has therefore become a major focus of medicinal chemistry research. Heterocyclic compounds have attracted considerable attention in drug discovery because of their diverse biological activities and structural versatility. Among them, pyrazole and pyrazoline derivatives have demonstrated promising pharmacological properties, including antimicrobial, anti-inflammatory, anticancer, antiviral, and antimalarial activities. Similarly, sulfonamides represent an important class of compounds with established therapeutic value and a long history of application in antimicrobial and antimalarial chemotherapy. The integration of sulfonamide and pyrazolylpyrazoline pharmacophores into a single molecular framework represents a rational strategy for the development of potent antimalarial agents. Such hybrid molecules may combine the beneficial properties of both scaffolds, leading to enhanced biological activity, improved selectivity, and reduced susceptibility to resistance mechanisms. This review discusses the current status of malaria and antimalarial drug resistance, the medicinal importance of sulfonamide and pyrazolylpyrazoline derivatives, synthetic methodologies employed for the preparation of these hybrid molecules, characterization techniques used for structural confirmation, and recent advances in their antimalarial evaluation. Particular emphasis is placed on structure–activity relationship studies and future prospects for the development of sulfonamide-based pyrazolylpyrazoline derivatives as next-generation antimalarial agents.

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