title: Selective Metal-free HB(C6F5)2Catalyzed Allene Cyclotrimerization: Formation of 1,3,5-Trimethylenecyclohexane and Its Tris-hydroboration Product.
abstract: Allene is cyclotrimerized under metal-free conditions with the borane HB(C6F5)2catalyst to selectively give 1,3,5-trimethylenecyclohexane (3 a). Three-fold hydroboration of the 1,3,5-cyclotrimer with Piers' borane gives the all-cis 1,3,5-CH2B(C6F5)2substituted cyclohexane product 14.
authors.affiliation: Organisch-Chemisches Institut, Westfälische Wilhelm-Universität Münster, Corrensstr. 40, 48149, Münster, Germany.
authors.forename: Xin
authors.initials: X
authors.lastname: Tao
authors.affiliation: Organisch-Chemisches Institut, Westfälische Wilhelm-Universität Münster, Corrensstr. 40, 48149, Münster, Germany.
authors.forename: Gerald
authors.initials: G
authors.lastname: Kehr
authors.affiliation: Organisch-Chemisches Institut, Westfälische Wilhelm-Universität Münster, Corrensstr. 40, 48149, Münster, Germany.
authors.forename: Constantin G
authors.initials: CG
authors.lastname: Daniliuc
authors.affiliation: Organisch-Chemisches Institut, Westfälische Wilhelm-Universität Münster, Corrensstr. 40, 48149, Münster, Germany.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Erker
keywords: Lewis acids; allenes; boron; cyclotrimerization; metal-free catalysis