Used as a ligand in transition metal-catalyzed coupling reactions, particularly in palladium-catalyzed cross-coupling processes such as Suzuki-Miyaura and Buchwald-Hartwig aminations. Its rigid benzo-dioxane backbone enhances steric and electronic control, improving catalyst efficiency and selectivity. Commonly employed in the synthesis of pharmaceuticals and fine chemicals where high enantioselectivity or functional group tolerance is required. Also utilized in materials science for constructing conjugated organic frameworks with tailored electronic properties.