title: Palladium-Catalyzed Carboxylation of Activated Vinylcyclopropanes with CO2.
abstract: By using a palladium catalyst with ZnEt2, activated vinylcyclopropanes were successfully converted into the corresponding β,γ-unsaturated carboxylic acids in high yields under a CO2 atmosphere (1 atm). The intermediate in this reaction is thought to be a nucleophilic η(1)-allylethylpalladium species, which would be produced from π-allylpalladium and ZnEt2 (umpolung reactivity).
authors.affiliation: Faculty of Pharmaceutical Sciences, Hokkaido University , Sapporo 060-0812, Japan.
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Mita
authors.affiliation: Faculty of Pharmaceutical Sciences, Hokkaido University , Sapporo 060-0812, Japan.
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Tanaka
authors.affiliation: Faculty of Pharmaceutical Sciences, Hokkaido University , Sapporo 060-0812, Japan.
authors.forename: Yuki
authors.initials: Y
authors.lastname: Higuchi
authors.affiliation: Faculty of Pharmaceutical Sciences, Hokkaido University , Sapporo 060-0812, Japan.
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Sato