title: Synthesis of 2,3-disubstituted indenones by cobalt-catalyzed [3+2] annulation of o-methoxycarbonylphenylboronic acid with alkynes.
abstract: Treatment of alkynes with o-methoxycarbonylphenylboronic acid in the presence of a cobalt catalyst resulted in the corresponding 2,3-disubstituted indenones in good yields. Excellent regioselectivities were observed, when silyl aryl alkynes were used. The intermediate 3-silyl-2-aryl-substituted indenones were converted to 2,3-diaryl indenones by a three-step protocol involving C-Si bromination and Suzuki-Miyaura coupling reaction.
authors: Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan. ueda@c.s.osakafu-u.ac.jp.
authors: Mitsuhiro
authors: M
authors: Ueda
authors: Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan. ueda@c.s.osakafu-u.ac.jp.
authors: Tamami
authors: T
authors: Ueno
authors: Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan. ueda@c.s.osakafu-u.ac.jp.
authors: Yuki
authors: Y
authors: Suyama
authors: Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan. ueda@c.s.osakafu-u.ac.jp.
authors: Ilhyong
authors: I
authors: Ryu