title: Nickel-Catalyzed CO2Rearrangement of Enol Metal Carbonates for the Efficient Synthesis of β-Ketocarboxylic Acids.
abstract: 4-Methylene-1,3-dioxolan-2-ones underwent oxidative addition of a Ni0catalyst in the presence of Me2Al(OMe), followed by a coupling reaction with alkynes, to form δ,ϵ-unsaturated β-ketocarboxylic acids with high regio- and stereoselectivity. The reaction proceeds by [1,3] rearrangement of an enol metal carbonate intermediate and the formal reinsertion of CO2.
authors.affiliation: Graduate School of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki, 852-8521, Japan.
authors.forename: Ryo
authors.initials: R
authors.lastname: Ninokata
authors.affiliation: Graduate School of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki, 852-8521, Japan.
authors.forename: Tatsuya
authors.initials: T
authors.lastname: Yamahira
authors.affiliation: Graduate School of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki, 852-8521, Japan.
authors.forename: Gen
authors.initials: G
authors.lastname: Onodera
authors.affiliation: Graduate School of Engineering, Nagasaki University, Bunkyo-machi 1-14, Nagasaki, 852-8521, Japan.
authors.forename: Masanari
authors.initials: M
authors.lastname: Kimura
keywords: alkynes; aluminum; cyclic carbonates; multicomponent reactions; nickel