A broad and simple method permitted halide ions in quaternary heteroaromatic and ammonium salts to be exchanged for a variety of anions using an anion exchange resin (A− form) in non-aqueous media. The anion loading of the AER (OH− form) was examined using two different anion sources, acids or ammonium salts, and changing the polarity of the solvents. The AER (A− form) method in organic solvents was
An oxidant‐free dehydrogenation of alcohols in the aqueous phase was developed for the first time using water‐soluble poly(N‐vinyl‐2‐pyrrolidone) (PVP)‐stabilized ruthenium nanoparticles with an ionic liquid as a promoter. The present catalytic system was highly efficient and stable for the catalytic dehydrogenation of various alcohols. It was found that the basic ionic liquid 1‐n‐butyl‐2,3‐dimethylimidazolium
使用离子液体作为促进剂的水溶性聚(N-乙烯基-2-吡咯烷酮)(PVP)稳定化钌纳米粒子,首次开发了水相中醇的无氧化剂脱氢。本催化体系对于各种醇的催化脱氢是高效且稳定的。结果发现,碱性离子液体1 - n-丁基-2-3,3-二甲基咪唑乙酸盐([BMMIM] OAc)添加剂在增强钌(0)纳米颗粒的催化活性和稳定性方面起着至关重要的作用。反应动力学研究和1 H NMR分析表明,碱性离子液体和钌纳米颗粒对脱氢反应具有协同作用。
A general halide-to-anion switch for imidazolium-based ionic liquids and oligocationic systems using anion exchange resins (A− form)
Further studies on the application of an AER (A(-) form) method broadened the anionexchange scope of representative ionic liquids and bis(imidazolium) systems. Depending on the hydrophobicity nature of the targeted imidazolium species and counteranions, different organic solvents were used to swap halides for assorted anions, proceeding in excellent to quantitative yields.
consequences on the environment. In this report, we are introducing an ionicliquid (IL) mediated, sustainable, and green synthesis of crotonic acid (CA) from poly-(3-hydroxybutyrate, PHB), a biopolymer derived from microbial fermentation. In this actual case, imidazolium cation comprising ILs have been used in the synthesis, where the influence of various reaction parameters such as reaction temperature and
将可再生和可生物降解的生物聚合物增值为增值化学品和绿色燃料目前被认为是一个重要的研究课题,旨在减少对化石衍生原料的依赖及其对环境的负面影响。在本报告中,我们将介绍一种离子液体 (IL) 介导的、可持续的、绿色合成巴豆酸 (CA) 的方法,该合成方法来自聚-(3-羟基丁酸酯,PHB),一种源自微生物发酵的生物聚合物。在这个实际案例中,包含 IL 的咪唑阳离子已用于合成,其中检查了各种反应参数的影响,例如反应温度和 IL 的类型以及反应混合物中聚合物、水和 IL 的量。在 IL 中 PHB 向 CA 的转化是通过碱催化解聚发生的,形成巴豆酰基封端的聚合物实体作为中间体,当反应在不同温度下进行时,通过对反应混合物取样的 NMR 分析证实了这一机制。CA形成率通过IL介导的碱催化解聚在测试区间内随着温度的升高而增加,并且在140℃下90分钟后获得97%的CA产率。用作溶剂和催化剂的 [EMIM][AcO]
Chakraborti, Asit K.; Roy, Sudipta Raha, Journal of the American Chemical Society, 2009, vol. 131, p. 6902 - 6903