title: Highly Selective Construction of Seven-Membered Carbocycles by Olefin-Assisted Palladium-Catalyzed Oxidative Carbocyclization-Alkoxycarbonylation of Bisallenes.
abstract: An olefin-assisted palladium-catalyzed oxidative carbocyclization-alkoxycarbonylation of bisallenes to afford seven-membered carbocycles has been established. This dehydrogenative coupling reaction showed excellent substrate scope and functional group compatibility. The reaction exhibited high chemo- and regioselectivity, and ester 3 was the only product obtained. The olefin unit has been proven to be indispensable during the reaction. Moreover, intramolecular oxidative coupling suggests that the reaction proceeds via a (π-allyl)palladium intermediate.
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, SE-106 91, Sweden. zhucaner@gmail.com.
authors.forename: Can
authors.initials: C
authors.lastname: Zhu
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, SE-106 91, Sweden.
authors.forename: Bin
authors.initials: B
authors.lastname: Yang
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, SE-106 91, Sweden.
authors.forename: Youai
authors.initials: Y
authors.lastname: Qiu
authors.affiliation: Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, Stockholm, SE-106 91, Sweden. jeb@organ.su.se.
authors.forename: Jan-E
authors.initials: JE
authors.lastname: Bäckvall
keywords: bisallene; carbocyclization; olefins; palladium; seven-membered carbocycles