Rhodium-catalyzed linear codimerization and cycloaddition of ketenes with alkynes.
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.
Kondo
Teruyuki
T
Advanced Biomedical Engineering Research Unit, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan. teruyuki@scl.kyoto-u.ac.jp
Niimi
Masatsugu
M
Yoshida
Yuki
Y
Wada
Kenji
K
Mitsudo
Take-aki
TA
Kimura
Yu
Y
Toshimitsu
Akio
A
D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry*; D007659:Ketones / Q000737:chemistry*; D015394:Molecular Structure; D012238:Rhodium / Q000737:chemistry*
D000480:Alkynes; D005030:Ethylenes; D007659:Ketones; D012238:Rhodium; C008223:ketene