title: Nickel-catalyzed [3 + 2 + 2] cycloaddition of ethyl cyclopropylideneacetate and heteroatom-substituted alkynes: application to selective three-component reaction with 1,3-diynes.
abstract: Heteroatom-substituted alkynes such as ynol ethers and ynamines turned out to be decent substrates for the Ni-catalyzed [3 + 2 + 2] cocyclization of ethyl cyclopropylideneacetate (1). The three-component cocyclization of 1, 1,3-diynes, and heteroatom-substituted alkynes also proceeded selectively. The study provided an efficient method for the synthesis of heteroatom-substituted cycloheptadiene and related compounds.
authors.affiliation: Department of Chemistry, Faculty of Science, Tokyo University of Science, Kagurazaka, Shinjuku, Tokyo, Japan 162-8601.
authors.forename: Ryu
authors.initials: R
authors.lastname: Yamasaki
authors.forename: Natsuki
authors.initials: N
authors.lastname: Terashima
authors.forename: Ikuo
authors.initials: I
authors.lastname: Sotome
authors.forename: Shunsuke
authors.initials: S
authors.lastname: Komagawa
authors.forename: Shinichi
authors.initials: S
authors.lastname: Saito