Used as an intermediate in organic synthesis, particularly in the preparation of pharmaceuticals and fine chemicals. Its structure allows for selective reactions in the development of cinnamic acid derivatives, which are important in the synthesis of anticoagulants, anti-inflammatory agents, and UV-absorbing compounds. Also employed in research for studying reaction mechanisms involving electrophilic substitution and olefinic coupling. The trans configuration enhances stability and reactivity in certain catalytic reactions, making it valuable in asymmetric synthesis and medicinal chemistry applications.