Used primarily as an intermediate in organic synthesis, especially in the preparation of pharmaceuticals and agrochemicals. Its reactivity allows for the introduction of the 2-chlorocinnamoyl group into larger molecules, facilitating the development of bioactive compounds. Commonly employed in the synthesis of esters and amides through acylation reactions. Also utilized in research settings for the development of novel functional materials and in the creation of analogs for structure-activity relationship studies in medicinal chemistry.