title: Transformation of azulenes to bicyclic [4]dendralene and heptafulvene derivatives via photochemical cycloaddition of dialkylsilylene.
abstract: Regioselective cycloaddition of dialkylsilylene upon irradiation at 440 nm converts azulene and guaiazulene to bicyclic [4]dendralene and heptafulvene derivatives, respectively. Significant σ-π interactions in the resulting new silacycles were suggested using UV-vis spectra and theoretical calculations.
authors.affiliation: Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan. sishida@m.tohoku.ac.jp iwamoto@m.tohku.ac.jp.
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Kosai
authors.forename: Shintaro
authors.initials: S
authors.lastname: Ishida
authors.forename: Takeaki
authors.initials: T
authors.lastname: Iwamoto