stable diacetyliminoxyl radical was presented as a “golden mean” between transient and stable unreactive radicals. It was successfully employed as a reagent for oxidative C–O coupling with β-dicarbonyl compounds. Using this model radical the catalytic activity of acids, bases and transition metal ions in free-radical coupling was revealed.
通常,用于有机合成的反应性自由基太不稳定而无法分离,而持久性自由基是惰性的并且发现其合成应用有限。在本研究中,异常稳定的二乙
酰亚胺氧基自由基被认为是瞬态和稳定非反应性自由基之间的“黄
金均值”。它成功地用作与 β-二羰基化合物进行氧化 C-O 偶联的试剂。使用该模型自由基揭示了酸、碱和过渡
金属离子在自由基偶联中的催化活性。