Used as a ligand in transition metal catalysis, particularly in asymmetric synthesis where its bulky tert-butyl group enhances stereoselectivity. Employed in the development of catalysts for olefin polymerization and hydrogenation reactions. Also serves as a building block in organic synthesis for pharmaceuticals and agrochemicals due to its stable quinoline core and modifiable aromatic structure. Its electron-rich nature makes it useful in materials science, especially in designing luminescent complexes and organic semiconductors.