Used as an intermediate in organic synthesis, particularly in the production of pharmaceuticals and fine chemicals. It participates in reactions where selective ester functionality is required, such as in the development of active pharmaceutical ingredients (APIs). Its α,β-unsaturated ester structure allows for Michael addition reactions, making it valuable in constructing carbon chains or functionalized molecules. Also employed in polymer chemistry to modify resin properties or introduce reactive sites. Its relatively stable ester group offers advantages in multi-step syntheses where protection of carboxylic acid groups is needed.