A remarkably simple α-oximation of aldehydes via organo-SOMO catalysis
作者:Patrizia Gentili、Silvia Pedetti
DOI:10.1039/c2cc31566a
日期:——
A novel α-oximation reaction of unactivated aldehydes has been achieved in excellent yields by reaction with NaNO2âFeCl3 couple and in the presence of pyrrolidine as organocatalyst.
relatively low pKas, and form >C=NO. radicals through OH hydrogen abstraction or oxidation of the oximate ion. Besides the well‐established E/Z oxime photoisomerism, we observed a Norrish–Yang cyclization resulting in cyclobutanol oximes, to our knowledge not previously described in the literature. The acidity, bond dissociation enthalpies, and electrochemical properties of the HIAs are compared with literature
在我们对带有2-(羟基亚氨基)醛(HIA)的刺激响应性聚合物的研究中,我们探索了许多HIA的光化学行为和理化特性。量子力学计算支持实验数据的解释。预期HIA会发生光异构化,螯合金属离子,产生氢键合的二聚体或低聚物,表现出相对较低的p K a s并以> C = NO的形式出现。自由基通过OH氢抽象或肟酸离子的氧化而产生。除了行之有效的E / Z肟的光致异构现象,据我们所知,以前没有文献报道过,我们观察到了Norrish-Yang环化反应生成环丁醇肟。将HIA的酸度,键解离焓和电化学性质与简单肟的文献数据进行了比较。讨论了与HIA的许多潜在应用有关的结果,重点是新型含HIA的响应性聚合物的合成。