(11aS)-1,11-Bis(diphenylphosphino)dibenzo[d,f][1,3]dioxepine is primarily used as a chiral ligand in asymmetric catalysis. It plays a significant role in facilitating enantioselective reactions, particularly in the synthesis of complex organic molecules. This compound is often employed in transition metal-catalyzed processes, such as hydrogenation, hydroformylation, and cross-coupling reactions, where high enantioselectivity is required. Its unique structure and chiral properties make it valuable in the pharmaceutical industry for producing enantiomerically pure drugs. Additionally, it is utilized in academic research to develop new catalytic methodologies and explore novel synthetic pathways.