Used in the synthesis of pharmaceutical intermediates, particularly in the development of kinase inhibitors and other bioactive molecules. Its aromatic and heterocyclic structure makes it valuable in forming carbon-heteroatom and carbon-carbon bonds through cross-coupling reactions. Commonly employed in medicinal chemistry for constructing fluorinated analogs of drug candidates to enhance metabolic stability and binding affinity. Also utilized in the preparation of fluorescent probes due to its aldehyde functionality, which allows for easy derivatization with amine- or hydrazine-containing fluorophores.