title: Unusual borane addition to conjugated dienylphosphanes under frustrated Lewis pair conditions.
abstract: Dimesitylphosphinoisoprene 9a reacts with a series of R-B(C6F5)2 boron Lewis acids by isomerization and subsequent 1,4-P/B addition to give the heterocyclic phosphonium/borate zwitterionic products 13. Subsequent hydride abstraction from the isoprenyl derived methyl group by trityl cation proceeds with elimination of the R-B(C6F5)2 reagent to give the heterocyclic phosphonium system 20.
authors.affiliation: Organisch-Chemisches Institut, Westfälische Wilhelms-Universität Münster, Corrensstrasse 40, 48149 Münster, Germany. erker@uni-muenster.de.
authors.forename: Sergei
authors.initials: S
authors.lastname: Krupski
authors.forename: Gerald
authors.initials: G
authors.lastname: Kehr
authors.forename: Constantin G
authors.initials: CG
authors.lastname: Daniliuc
authors.forename: Gerhard
authors.initials: G
authors.lastname: Erker