This highly enantiopure compound ((11aR)-configuration, ≥99% e.e.) is a specialty chemical used in asymmetric catalysis and advanced materials research. It acts as a chiral ligand or intermediate in synthesizing complex phosphorus-containing molecules, enabling enantioselective C-C and C-heteroatom bond formations with improved efficiency and selectivity due to its fused indeno rings and naphthalenyl substituents. It also supports optoelectronic applications in organic semiconductors for OLEDs and photovoltaic cells by enhancing charge transport, stability, and device performance. Furthermore, its complex structure offers potential in pharmaceutical development for bioactive compounds through effective biological target binding.