Electrogenerated N-Heterocyclic Carbene in Ionic Liquid: An Insight into the Mechanism of the Oxidative Esterification of Aromatic Aldehydes
作者:Gianpiero Forte、Isabella Chiarotto、Achille Inesi、Maria Antonietta Loreto、Marta Feroci
DOI:10.1002/adsc.201400163
日期:2014.5.26
An N‐heterocyclic carbene (NHC), generated by cathodic reduction of BMIm BF4, mediates the oxidative esterification of aromatic aldehydes with organic bromides in the corresponding ionic liquid as solvent. The product recovery by simple extractive work‐up with diethyl ether allowed the ionic liquid to be recycled up to 9 times for subsequent electrolyses, with no significant loss in the product yield
通过阴极还原BMIm BF 4生成的N杂环卡宾(NHC)介导芳族醛与有机溴化物在相应的离子液体中作为溶剂的氧化酯化反应。通过用乙醚进行的简单萃取后的产物回收,可使离子液体循环使用多达9次以进行后续电解,而产物收率没有明显损失。中间体的分离(通过合成和转化为酯确认了其结构)为深入了解反应提供了关键。