Electrochemical behaviour of 9-methylcaffeinium iodide and in situ electrochemical synthesis of hymeniacidin
作者:Fabiana Pandolfi、Leonardo Mattiello、Daniela Zane、Marta Feroci
DOI:10.1016/j.electacta.2018.05.073
日期:2018.8
bio-based salt obtained by reaction of caffeine with methyl iodide, is an imidazolium salt. The electrochemical behaviour of 9-methylcaffeinium iodide was studied by means of cyclic voltammetry, differential pulse voltammetry and electrolysis. Its behaviour revealed to be very similar to that of common imidazolium salts. In fact, its cathodic reduction yielded the corresponding N-heterocyclic carbene, which
9-甲基咖啡因碘化物是通过咖啡因与甲基碘反应而获得的生物基盐,为咪唑鎓盐。通过循环伏安法,微分脉冲伏安法和电解法研究了9-甲基咖啡因碘化物的电化学行为。揭示其行为与常见的咪唑鎓盐非常相似。实际上,其阴极还原产生了相应的N-杂环卡宾,这是由其与二氧和与硫的反应产物证明的,尽管量很小。实际上,这种电生成的卡宾非常不稳定并且易于加水,从而以高收率产生开环产物(月桂酸)。Hymeniacidin是海洋海绵Hymeniacidon的天然产物sp。通过比较起始咖啡因盐和菊苣酸的伏安峰值电位,分离出的菊苣酸的伏安行为证实了该开环产物的原位形成。这项研究可以确定菊苣酸是从NHC衍生而来的,而不是通过咖啡因盐的水解来确定的。