Angewandte Chemie International Edition
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Inside Cover: Perfluoropentaphenylborole (Angew. Chem. Int. Ed. 16/2009)
Perfluoroaryl boranes are an important class of organometallic Lewis acids. The synthesis of perfluorinated compounds brings special challenges to tried-and-true synthetic methodologies. In their Communication on page 2955 ff., W. E. Piers and co-workers present the synthesis of a new, fully fluorinated heterocyclic borane that is also a member of the rare antiaromatic borole class of compounds. The route relies on normally facile transmetallation reactions made more difficult by the electron-withdrawing C6F5 groups of the target product.