作者:Alexandre Pinto、Daniel Kaiser、Boris Maryasin、Giovanni Di Mauro、Leticia González、Nuno Maulide
DOI:10.1002/chem.201706063
日期:2018.2.16
Organic synthesis boasts a wide array of reactions involving either radical species or ionic intermediates. The combination of radical and polar species, however, has not been explored to a comparable extent. Herein we present the hydrative aminoxylation of ynamides, a reaction which can proceed by either a polar-radical crossover mechanism or through a rare cationic activation. Common to both processes
有机合成拥有涉及自由基物质或离子中间体的广泛反应。然而,自由基和极性物种的结合尚未得到相当程度的探索。在这里,我们提出了 ynamides 的水合氨氧基化反应,该反应可以通过极性-自由基交叉机制或通过罕见的阳离子活化进行。这两个过程的共同点是持久自由基 TEMPO 及其氧化的氧代铵衍生物 TEMPO+ 的多功能性。通过实验和深入的 DFT 计算阐明了这些过程的独特机制。