title: A novel approach to 2-arylated quinolines: electrocyclization of alkynyl imines via vinylidene complexes.
abstract: [reaction: see text] Alkynyl imines underwent [4 + 2] electrocyclization in the presence of 20 mol % W(CO)(5)(THF) to give 2-arylated quinolines in good yields. A deuterium labeling study suggests that the reaction proceeds via a tungsten vinylidene complex.
authors.affiliation: Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro Toshima-ku, Tokyo 171-8588, Japan.
authors.forename: Kenichiro
authors.initials: K
authors.lastname: Sangu
authors.forename: Kohei
authors.initials: K
authors.lastname: Fuchibe
authors.forename: Takahiko
authors.initials: T
authors.lastname: Akiyama