2-Hydroxy-4-ethylpyrimidine-5-boronic acid is primarily utilized in organic synthesis, particularly in Suzuki-Miyaura cross-coupling reactions. This compound serves as a key intermediate for constructing complex molecules, especially in the development of pharmaceuticals and agrochemicals. Its boronic acid group enables the formation of carbon-carbon bonds, making it valuable in the synthesis of biologically active compounds. Additionally, it is employed in the preparation of pyrimidine derivatives, which are often explored for their potential therapeutic properties, including antiviral and anticancer activities. The compound’s stability and reactivity make it a useful tool in medicinal chemistry research and drug discovery processes.