title: Formation of Thermally Robust Frustrated Lewis Pairs by Electrocyclic Ring Closure Reactions.
abstract: The phosphorus/boron-substituted hexatriene systems 6 undergo thermally induced electrocyclic ring closure to yield the cyclohexadiene-derived P/B frustrated Lewis pairs (FLPs) 7. Subsequent TEMPO oxidation gives the phenylene-bridged FLPs 8. Both systems activate dihydrogen and the thermally robust FLPs undergo carbon-carbon coupling reactions at a mesityl group upon treatment with dimethyl acetylenedicarboxylate at elevated temperatures.
authors.affiliation: Organisch-Chemisches Institut der Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
authors.forename: Guo-Qiang
authors.initials: GQ
authors.lastname: Chen
authors.affiliation: Organisch-Chemisches Institut der Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
authors.forename: Gerald
authors.initials: G
authors.lastname: Kehr
authors.affiliation: Organisch-Chemisches Institut der Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
authors.forename: Constantin G
authors.initials: CG
authors.lastname: Daniliuc
authors.affiliation: Organisch-Chemisches Institut der Universität Münster, Corrensstraße 40, 48149, Münster, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Mück-Lichtenfeld
authors.affiliation: Organisch-Chemisches Institut der Universität Münster, Corrensstraße 40, 48149, Münster, Germany. erker@uni-muenster.de.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Erker
keywords: aromatization reaction; electrocyclic ring closure; frustrated Lewis pairs; ipso substitution; metal-free dihydrogen activation