Anionic boraza‐crown ethers

Making one out of two: Dimeric boraza-crown ethers bridge the gap between metallacrowns and aza-crown with a strikingly simple synthesis. Dioxazaborocanes react alkoxides to form corresponding anionic boronates, which combine dimers upon ring-opening reactions. The presence was proven in solid state solution by X-ray crystallography NMR spectroscopy, respectively. influence counterion on stability examined using DFT calculations. dissociation monomeric species found be endothermic, independently counterion. Finally, their ability engage cross-coupling reactions validated for two different compounds.