Used as a key intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and agrochemicals. Its reactive alkyne and ester groups allow for versatile functionalization, making it valuable in constructing complex molecules. Commonly employed in carbon chain elongation and cyclization reactions, it plays a role in synthesizing vitamins, fragrances, and bioactive compounds. Also utilized in click chemistry due to the presence of the triple bond, enabling efficient coupling reactions under mild conditions.