(11bR,11’bR)-2,2′-[Oxybis(methylene)]bis[4-hydroxy-4,4′-dioxide-dinaphtho[2,1-d:1′,2′-f][1,3,2]dioxaphosphepin] is a chiral phosphoric acid catalyst for a variety of enantioselective transformations, especially for carbon-carbon and carbon-heteroatom bond-forming reactions.