title: Rh/Cu-Catalyzed Cascade [4+2] Vinylic C-H O-Annulation and Ring Contraction of α-Aryl Enones with Alkynes in Air.
abstract: An unprecedented Rh-catalyzed ketone-directed vinylic C-H activation/[4+2] O-annulation of α-aryl enones with internal alkynes followed by a Cu-catalyzed ring contraction in air to provide multiaryl-substituted furan derivatives has been developed. The preliminary mechanism study identifies the active pyrylium salt as the key intermediate.
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Yinsong
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Shiqing
authors.initials: S
authors.lastname: Li
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Xuesong
authors.initials: X
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Junbin
authors.initials: J
authors.lastname: Tang
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Zhijie
authors.initials: Z
authors.lastname: She
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Ge
authors.identifier: 0000-0001-9980-7311
authors.initials: G
authors.lastname: Gao
authors.affiliation: Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu, 610064, P.R. China.
authors.forename: Jingsong
authors.initials: J
authors.lastname: You
keywords: O-annulation; furans; pyrylium; vinylic C−H activation; α-aryl enone