title: Synthesis of silafluorenes by iridium-catalyzed [2 + 2 + 2] cycloaddition of silicon-bridged diynes with alkynes.
abstract: [reaction: see text] Silicon-bridged 1,6-diynes underwent [2 + 2 + 2] cycloaddition with alkynes in the presence of an iridium(I)-phosphine catalyst to afford densely substituted silafluorene derivatives. Extended silafluorene skeletons were constructed by the [2 + 2 + 2] cycloaddition of tetraynes.
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Kyoto University, Katsura, Kyoto 615-8510, Japan.
authors.forename: Takanori
authors.initials: T
authors.lastname: Matsuda
authors.forename: Sho
authors.initials: S
authors.lastname: Kadowaki
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Goya
authors.forename: Masahiro
authors.initials: M
authors.lastname: Murakami