Enantioselective Synthesis of 4,4′-Biaryl-BINOLs from Arynes and β-Diketones

The reaction of 2-(trimethylsilyl) phenyl triflate with aroylacetones in the presence of CsF gave the corresponding 4-aryl-2-naphthols. Substituted triflates also reacted with aroylacetones to afford 4-aryl-2-naphthols regioselectively. The enantioselective oxidation of 4aryl-2-naphthols with a chiral tridentate oxovanadium(IV) complex furnished the corresponding 4,4'-biaryl-1,1'-binaphthols in good yields.