Used primarily as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of nicotinic acetylcholine receptor modulators. It plays an important role in the production of drugs targeting neurological disorders such as Alzheimer's disease, Parkinson's disease, and psychiatric conditions like depression and schizophrenia. Its ethynyl and chloro functional groups allow for selective cross-coupling reactions, making it valuable in medicinal chemistry for building complex heterocyclic systems. Also employed in agrochemicals for the creation of novel pesticides due to its ability to enhance bioactivity in certain active ingredients.