title: Palladium-catalyzed coupling of two alkynes and an alkenyl iodide: formation of pentasubstituted fulvenes.
abstract: [reaction: see text]. Disubstituted alkynes reacted with alkenyl iodide in the presence of a catalytic amount of Pd(OAc)2 and Ag2CO3 to give pentasubstituted fulvene derivatives in excellent yields. Other Ag salts such as AgNO3, AgBF4, and AgOTf are not effective, whereas a combination of AgNO3 and K2CO3 has a remarkable effect on the formation of fulvene.
authors.affiliation: Catalysis Research Center and Graduate School of Pharmaceutical Sciences, Hokkaido University, Kita-ku, Sapporo 060 -0811, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Kotora
authors.forename: H
authors.initials: H
authors.lastname: Matsumura
authors.forename: G
authors.initials: G
authors.lastname: Gao
authors.forename: T
authors.initials: T
authors.lastname: Takahashi