Synthesis of Optically Active N,N,N′,N′-Tetraphenyl-1,1′-binaphthyl-2,2′-diamine Derivatives as Analogues of BINAP

As analogues of BINAP, optically active N, N, N ′, N ′-tetraaryl-1,1′-binaphthyl-2,2′-diamines have been prepared by palladium-catalyzed coupling reactions of optically active 1,1′-binaphthyl-2,2′-diamine with an excess amount of aryl bromides. A novel diamine-bridged dirhodium π-arene complex has been produced and characterized by X-ray analysis.