NHC-stabilized 1-hydro-1H-borole and its nondegenerate sigmatropic isomers |
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| Authors: | Braunschweig Holger Chiu Ching-Wen Kupfer Thomas Radacki Krzysztof |
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| Affiliation: | Institut für Anorganische Chemie, Julius-Maximilians Universit?t Würzburg, Am Hubland, 97074 Würzburg, Germany. h.braunschweig@mail.uni-wuerzburg.de |
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| Abstract: | Electrophilic quenching of a carbene-stabilized π-boryl anion with the Br?nsted 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. |
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