3-Amino-2H-chromen-2-one, also known as acridin-9(10H)-one, is a versatile compound widely utilized in chemical synthesis for various applications. Its unique structure and reactivity make it a valuable building block in the creation of diverse organic compounds. One of the key applications of 3-Amino-2H-chromen-2-one is in the synthesis of heterocyclic compounds. This compound can undergo reactions with different electrophiles and nucleophiles to form fused heterocycles with nitrogen, oxygen, or sulfur atoms in the ring. These heterocyclic compounds have a wide range of biological activities and are used in the development of pharmaceuticals, agrochemicals, and materials.Furthermore, 3-Amino-2H-chromen-2-one can also be employed in the synthesis of fluorescent dyes and probes. By introducing specific functional groups to the chromenone scaffold, researchers can tailor the fluorescence properties of the resulting compounds for various applications in imaging, sensing, and detection.In addition to these applications, 3-Amino-2H-chromen-2-one has found utility in the preparation of complex molecules, natural product synthesis, and materials science. Its versatility and ease of functionalization make it a valuable precursor in organic chemistry, enabling the creation of diverse chemical structures with potential applications across different fields.