title: Nickel-catalyzed cycloaddition of o-arylcarboxybenzonitriles and alkynes via cleavage of two carbon-carbon σ bonds.
abstract: An intermolecular cycloaddition reaction has been developed, where o-arylcarboxybenzonitriles react with alkynes to afford coumarins in the presence of Ni(0)/P(CH(2)Ph)(3)/MAD as a catalyst. The reaction process displays an unusual mechanistic feature-the cleavage of two independent C-CN and C-CO bonds.
authors.affiliation: Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan.
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Nakai
authors.forename: Takuya
authors.initials: T
authors.lastname: Kurahashi
authors.forename: Seijiro
authors.initials: S
authors.lastname: Matsubara