title: Rhodium-catalyzed linear codimerization and cycloaddition of ketenes with alkynes.
abstract: A novel rhodium-catalyzed linear codimerization of alkyl phenyl ketenes with internal alkynes to dienones and a novel synthesis of furans by an unusual cycloaddition of diaryl ketenes with internal alkynes have been developed. These reactions proceed smoothly with the same rhodium catalyst, RhCl(PPh(3))(3), and are highly dependent on the structure and reactivity of the starting ketenes.
authors.affiliation: Advanced Biomedical Engineering Research Unit, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. teruyuki@scl.kyoto-u.ac.jp
authors.forename: Teruyuki
authors.initials: T
authors.lastname: Kondo
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Niimi
authors.forename: Yuki
authors.initials: Y
authors.lastname: Yoshida
authors.forename: Kenji
authors.initials: K
authors.lastname: Wada
authors.forename: Take-aki
authors.initials: TA
authors.lastname: Mitsudo
authors.forename: Yu
authors.initials: Y
authors.lastname: Kimura
authors.forename: Akio
authors.initials: A
authors.lastname: Toshimitsu
mesh_terms: D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D015394:Molecular Structure; D012238:Rhodium / Q000737:chemistry*
chemical_list: D000480:Alkynes; D005030:Ethylenes; D007659:Ketones; D012238:Rhodium; C008223:ketene