(11bS)-2,6-Bis[4-(1,1-dimethylethyl)phenyl]-4-hydroxy-4-oxide-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.