Structural aspects of HIV-1 integrase inhibitors: SAR studies and synthetic strategies

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Abstract
Acquired immunodeficiency syndrome (AIDS) poses a significant threat to life. Antiretroviral therapy is employed to diminish the replication of the human immunodeficiency virus (HIV), extending life expectancy and improving the quality of patients’ lives. These HIV-1 integrase inhibitors form robust covalent interactions with Mg2+ ions, contributing to their tight binding, thereby inhibiting the integration of viral DNA into the CD4 cell DNA. The second-generation INSTIs, the most recently approved, exhibit a higher genetic barrier compared to first-generation drugs. Hence, there is a need to develop novel and safe compounds as inhibitors of HIV-1 integrase. This article presents an overview of the current landscape of anti-HIV-1 integrase inhibitors, emphasizing the structure–activity relationship (SAR) of small molecules. The molecules discussed include monocyclic rings consisting of triazoles moiety, and pyrimidine analog along with bicyclic rings with nitrogen-containing moieties. Researchers are exploring anti-HIV-1 integrase inhibitors from natural sources like marine environments, plant extracts, and microbial products, emphasizing the importance of diverse bioactive compounds in combating the virus, which have also been included in the manuscript. The current manuscript will be helpful to the scientific community engaged in the manipulation of small molecules as anti-HIV integrase inhibitors for designing newer leads.

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