Used as a chiral organocatalyst in asymmetric synthesis, particularly in enantioselective phosphorylation and esterification reactions. Its sterically hindered structure and stable phosphine oxide framework make it effective for controlling stereochemistry in the formation of chiral phosphates and phosphonates, which are important in pharmaceuticals and agrochemicals. Also employed in the synthesis of axially chiral biaryl compounds due to its ability to induce high enantioselectivity. Suitable for reactions requiring robust, non-metallic catalysts with strong Lewis basic properties.