5-Methoxypyrimidine-2-carboxylic acid is primarily used in the field of pharmaceutical research and development. It serves as a key intermediate in the synthesis of various biologically active compounds, particularly those targeting enzyme inhibition and receptor modulation. Its structure is often incorporated into molecules designed for therapeutic applications, such as antiviral, anticancer, and anti-inflammatory agents. Additionally, it is utilized in the preparation of pyrimidine-based derivatives, which are explored for their potential in drug discovery and medicinal chemistry. The compound’s versatility also makes it valuable in the study of structure-activity relationships (SAR) to optimize drug efficacy and selectivity.