Iodonium Cation‐Pool Electrolysis for the Three‐Component Synthesis of 1,3‐Oxazoles
作者:Lars E. Sattler、Gerhard Hilt
DOI:10.1002/chem.202004140
日期:2021.1.7
The synthesis of 1,3‐oxazoles from symmetrical and unsymmetrical alkynes was realized by an iodonium cation‐pool electrolysis of I2 in acetonitrile with a well‐defined water content. Mechanistic investigations suggest that the alkyne reacts with the acetonitrile‐stabilized I+ ions, followed by a Ritter‐type reaction of the solvent to a nitrilium ion, which is then attacked by water. The ring closure
由对称和不对称炔烃合成 1,3-恶唑是通过在乙腈中对 I 2进行碘鎓阳离子池电解来实现的,水含量明确。机理研究表明,炔烃与乙腈稳定的 I +离子发生反应,随后溶剂发生 Ritter 型反应,生成腈离子,然后被水攻击。 1,3-恶唑的环闭合释放出肉眼可见的碘分子。此外,还测试了一些不对称的内炔,并通过二维核磁共振实验确定了单一异构体的区域选择性形成。