Used as a ligand in transition metal catalysis, particularly in asymmetric synthesis. Its phosphorus center coordinates with metals like palladium, rhodium, or ruthenium to form catalysts that enable enantioselective transformations, such as hydrogenation or cross-coupling reactions. The rigid benzo-fused dioxaphosphepine ring enhances stereocontrol, while the diisopropylamino group fine-tunes electronic properties. This makes the compound valuable in pharmaceutical and fine chemical synthesis where high enantiomeric purity is required.