4-Hydroxyindolin-2-one finds application in the field of organic synthesis, where it serves as a key intermediate in the production of various biologically active compounds. It is particularly valuable in the synthesis of pharmaceuticals, including potential drugs for treating neurological disorders and cancer. Its structure is utilized in the development of inhibitors for specific enzymes, contributing to targeted therapies. Additionally, it is employed in the creation of natural product analogs, aiding in the exploration of novel bioactive molecules for medicinal chemistry research.