Chandrasekar R
The chemical synthesis of antiviral compounds is essential for developing effective treatments against viral infections. It enables researchers to design molecules that specifically inhibit viral replication, target viral enzymes, or prevent viral entry into host cells. Major synthetic strategies include traditional organic synthesis, combinatorial chemistry, green chemistry, and structure-based drug design. Structure-based approaches use detailed knowledge of viral proteins to develop molecules capable of binding and blocking their functions. Nucleoside analogs, such as acyclovir and remdesivir, mimic natural nucleotides and interfere with viral genome replication, often requiring several chemical modifications to improve stability and bioavailability. High-throughput screening accelerates antiviral discovery by testing large libraries of synthetic compounds against viral or cellular targets. Combinatorial chemistry facilitates rapid generation of diverse molecular libraries, while fragment-based drug design helps identify and optimize small molecular fragments into potent antiviral agents. Peptidomimetics and small-molecule inhibitors are also important, with HIV protease inhibitors such as ritonavir and lopinavir disrupting viral protein processing and maturation. Fusion inhibitors, including enfuvirtide, prevent viral entry into host cells. Green chemistry has increasingly influenced antiviral synthesis by minimizing hazardous reagents, waste, and environmental impact. Biocatalysis provides selective enzymatic transformations, whereas flow chemistry improves reaction control, safety, scalability, and manufacturing efficiency. These approaches support more sustainable pharmaceutical production. Recent advances in computational chemistry and artificial intelligence have further accelerated antiviral drug discovery. Machine learning can analyze extensive molecular datasets, predict compound–target interactions, identify promising candidates, and optimize synthetic pathways. Together, innovative chemical methods, computational technologies, and sustainable synthesis strategies continue to expand the development of antiviral agents. Consequently, chemical synthesis remains a cornerstone of modern antiviral therapy, supporting rapid responses to emerging viral diseases and contributing significantly to improved global health outcomes.