Used as a key intermediate in the synthesis of biologically active quinazoline derivatives, particularly in pharmaceutical research targeting kinase inhibitors. Exhibits utility in developing compounds with potential antitumor, antiviral, and anti-inflammatory properties. Commonly employed in medicinal chemistry for structure-activity relationship studies due to its ability to act as a scaffold for substitution at multiple positions. Also applied in the preparation of fluorescent probes and optoelectronic materials owing to its conjugated structure and electron-deficient character.