Comprehensive Review of Tri- and Tetra-Substituted Imidazoles and Their Therapeutic Applications

The term “tri- and tetra-substituted imidazole’s” refers to a noteworthy class of heterocyclic compounds that occupy a central position in modern chemistry due to their remarkable structural flexibility and diverse pharmacological profiles. In recent years, the imidazole core and its derivatives have attracted significant attention because of their occurrence in numerous pharmaceutical agents and their therapeutic potential against a wide range of diseases. Moreover, this fundamental scaffold is found in several natural products, including the essential amino acid L-histidine and its derivatives, which exhibit notable pharmacological activities. In this review, we present a detailed account of the historical advancement in the production of imidazole’s with three and four substituents via the Radziszewski reaction a well-known condensation process involving an aldehyde, an α-dicarbonyl compound, and two equivalents of ammonia. Additionally, we discuss the various synthetic methodologies and biological applications described in the literature, with special emphasis on their bacteriological assessments.