title: Selective Synthesis of Partially Protected d-Talopyranosides and d-Gulopyranosides via Catalytic Asymmetric Dihydroxylation: Multiplier Effects of Substrate Control and Catalyst Control.
abstract: Highly selective syntheses of d-talopyranosides and d-gulopyranosides have been achieved by utilizing the multiplier effects of substrate control and catalyst control. Through the combination of an O-benzoyl-protected substrate and the AD-mix-β system, the d-talopyranoside was obtained in a ratio of 96:4. In contrast, the d-gulopyranoside was obtained in a ratio of 3:97 through the use of an O-tert-butyldimethylsilyl-protected substrate and AD-mix-α.
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University , Kobe 657-8501, Japan.
authors.forename: Yoichi
authors.initials: Y
authors.lastname: Namito
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University , Kobe 657-8501, Japan.
authors.forename: Kyosuke
authors.initials: K
authors.lastname: Michigami
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University , Kobe 657-8501, Japan.
authors.forename: Takaaki
authors.initials: T
authors.lastname: Nagahashi
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University , Kobe 657-8501, Japan.
authors.forename: Ryosuke
authors.initials: R
authors.lastname: Matsubara
authors.affiliation: Department of Chemistry, Graduate School of Science, Kobe University , Kobe 657-8501, Japan.
authors.forename: Masahiko
authors.initials: M
authors.lastname: Hayashi