Methyl isoquinoline-7-carboxylate finds its primary application in the field of organic synthesis, where it serves as a key intermediate in the production of various biologically active compounds. It is particularly valuable in the development of pharmaceuticals, where it is used to create molecules with potential therapeutic effects, such as anti-inflammatory, anticancer, and antimicrobial agents. Additionally, this compound is utilized in the synthesis of complex heterocyclic structures, which are essential in the design of new drugs and agrochemicals. Its role in facilitating the construction of intricate molecular frameworks makes it a crucial component in medicinal chemistry and drug discovery research.