title: NHC-stabilized 1-hydro-1H-borole and its nondegenerate sigmatropic isomers.
abstract: Electrophilic quenching of a carbene-stabilized π-boryl anion with the Brønsted acid Et(3)NHCl provides a convenient synthetic route to the parent NHC-stabilized 1-hydroborole, which isomerizes to the corresponding 3-hydroborole via two successive nondegenerate [1,5]-sigmatropic hydrogen migrations. Molecular structures of both isomers have been determined by X-ray crystallography.
authors.affiliation: Institut für Anorganische Chemie, Julius-Maximilians Universität Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@mail.uni-wuerzburg.de
authors.forename: Holger
authors.initials: H
authors.lastname: Braunschweig
authors.forename: Ching-Wen
authors.initials: CW
authors.lastname: Chiu
authors.forename: Thomas
authors.initials: T
authors.lastname: Kupfer
authors.forename: Krzysztof
authors.initials: K
authors.lastname: Radacki