查看文章

N-Heterocyclic carbene pentafluorophosphorus (NHC-PF₅) adducts are six-coordinate phosphorus(v) compounds with emerging applications but poor synthetic accessibility. We have developed a simple and high yielding protocol for synthesizing imidazolylidene NHC-PF₅ adducts from silylimidazolium hexafluorophosphate salts. Using this methodology, we have prepared a series of NHC-PF₅ adducts in high yields, including new NHC-PF₅ building blocks amenable to subsequent synthetic diversification. We also demonstrate that a similar approach enables access to analogous, synthetically elusive NHC-BF₃ and NHC-SbF₅ adducts.