Used primarily in organic synthesis as a reactive building block due to its strained ring structure and conjugated double bond system. It serves as a Michael acceptor in various addition reactions, making it valuable in the preparation of complex lactone derivatives and natural product analogs. Commonly employed in the development of pharmaceuticals and biologically active compounds, especially those targeting anti-inflammatory and anticancer pathways. Also utilized in polymer chemistry to introduce functional groups into macromolecules, enhancing reactivity or modifying material properties. Its high reactivity requires careful handling and controlled conditions during use.