title: Sodium tetraarylborates as effective nucleophiles in rhodium/diene-catalyzed 1,4-addition to beta,beta-disubstituted alpha,beta-unsaturated ketones: catalytic asymmetric construction of quaternary carbon stereocenters.
abstract: A rhodium-catalyzed 1,4-addition of sodium tetraarylborates to beta,beta-disubstituted alpha,beta-unsaturated ketones is described. Highly efficient asymmetric catalysis has also been achieved by employing a readily available chiral diene ligand, leading to the construction of quaternary carbon stereocenters with high enantioselectivity.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan. shintani@kuchem.kyoto-u.ac.jp
authors.forename: Ryo
authors.initials: R
authors.lastname: Shintani
authors.forename: Yosuke
authors.initials: Y
authors.lastname: Tsutsumi
authors.forename: Makoto
authors.initials: M
authors.lastname: Nagaosa
authors.forename: Takahiro
authors.initials: T
authors.lastname: Nishimura
authors.forename: Tamio
authors.initials: T
authors.lastname: Hayashi