title: Enantioselective synthesis of C2 -symmetric spirobipyridine ligands through cationic Rh(I)/modified-BINAP- catalyzed double [2 + 2 + 2] cycloaddition.
abstract: [structure: see text]. Enantioenriched C2-symmetric spirobipyridine ligands were efficiently synthesized through a cationic rhodium(I)/(R)-Segphos or (R)-H8-BINAP complex-catalyzed enantioselective intramolecular double [2 + 2 + 2] cycloaddition of bis-diynenitriles.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, and Instrumentation Analysis Center, Tokyo University of Agriculture and Technology, Koganei, Tokyo, Japan.
authors.forename: Azusa
authors.initials: A
authors.lastname: Wada
authors.forename: Keiichi
authors.initials: K
authors.lastname: Noguchi
authors.forename: Masao
authors.initials: M
authors.lastname: Hirano
authors.forename: Ken
authors.initials: K
authors.lastname: Tanaka