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Preparation of NHC Borane Complexes by Lewis Base Exchange with Amine− and Phosphine−Boranes

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posted on 15.10.2010, 00:00 by Malika Makhlouf Brahmi, Julien Monot, Marine Desage-El Murr, Dennis P. Curran, Louis Fensterbank, Emmanuel Lacôte, Max Malacria
A versatile new method for the preparation of NHC boranes starting from two stable, readily available reactants―an heterocyclic salt and an amine or phosphine−borane―is reported. It uses a Lewis base exchange at boron and provides easy access to new NHC boranes, in particular B-substituted borane ones.