Methyl isoquinoline-3-carboxylate is primarily utilized in the field of organic synthesis as a key intermediate for the development of various bioactive compounds. Its structure serves as a building block in the synthesis of pharmaceuticals, particularly in the creation of potential therapeutic agents targeting neurological disorders and cancer. Additionally, it is employed in the research and development of novel heterocyclic compounds, which are essential in drug discovery and medicinal chemistry. Its applications also extend to the study of enzyme inhibitors, where it aids in understanding biochemical pathways and designing molecules with specific biological activities.