Ir/C and Brφnsted acid functionalized ionic liquids: an efficient catalytic system for hydrogenation of nitrobenzene to p-aminophenol
作者:Hong Wang、Taotao Jiang、Lei Ma、Hanbing Wang、Xiaoliang Xu、Chunshan Lu、Xiaonian Li
DOI:10.1039/c7ra04722c
日期:——
and Brφnsted acidfunctionalizedionicliquid was applied, for the first time, to the one-pot hydrogenation of nitrobenzene to p-aminophenol. Our results indicate that the PAP selectivity of Ir/C and [SO3H-bmim][HSO4] Brφnsted functionalizedionicliquid was far more than that of the traditional Pt/C and sulfuric acidcatalyst system. Furthermore, the dually functionalizedionicliquid ([HSO3-b-N-Bu3][HSO4])
Facile synthesis of fructone from ethyl acetoacetate and ethylene glycol catalyzed by SO3H-functionalized Brønsted acidic ionic liquids
作者:Yong Liu、Yi-Tao Wang、Tao Liu、Duan-Jian Tao
DOI:10.1039/c4ra01708k
日期:——
SO3H-functionalized Brønsted acidic ionicliquids (BAILs) were synthesized and utilized as highly efficient catalysts for the production of fructone via the acetalization reaction of ethyl acetoacetate with ethylene glycol. In comparison with conventional H2SO4 and cation exchange resins, the BAILs N-(4-sulfonic acid) butyl triethylammonium hydrogensulfate ([BSEt3N][HSO4]) of strongacidities exhibited excellent
Valorization of chitin derived N-acetyl-D-glucosamine into high valuable N-containing 3-acetamido-5-acetylfuran using pyridinium-based ionic liquids
作者:Hongjun Zang、Jing Lou、Shuolei Jiao、Huanxin Li、Yannan Du、Jiao Wang
DOI:10.1016/j.molliq.2021.115667
日期:2021.5
liquid reached 37.49%, without any additives. Using B2O3 and CaCl2 as additives, the optimum yield increased to 67.37% at 180 °C in 20 min. In addition, HPLC-MS analysis has been utilized to elucidate the reaction mechanism. This research on turning “waste” into “wealth” opens up new ways for the utilization of biomass waste, which not only reduces environmental pollution but also has potential economic
几丁质及其衍生物含有生物固定的氮元素,可以为含氮化学物质提供氮源。在此,合成了一系列基于吡啶鎓的离子液体,以直接催化N-乙酰基-D-葡糖胺(NAG,几丁质的单体)向3-乙酰氨基-5-乙酰基呋喃(3A5AF)的转化。1-羧甲基吡啶鎓氯化物离子液体中3A5AF的收率达到37.49%,无任何添加剂。使用B 2 O 3和CaCl 2作为添加剂,在180°C下20分钟内,最佳收率增加到67.37%。另外,已经利用HPLC-MS分析来阐明反应机理。这项将“废物”转化为“财富”的研究为生物质废物的利用开辟了新途径,不仅减少了环境污染,而且具有潜在的经济价值。
Protic onium salts-catalyzed synthesis of 5-aryl-2-oxazolidinones from aziridines and CO2 under mild conditions
作者:Zhen-Zhen Yang、Yu-Nong Li、Yang-Yang Wei、Liang-Nian He
DOI:10.1039/c1gc15581d
日期:——
Protic onium salts, e.g.pyridium iodide, proved to be highly efficient and recyclable catalysts for the selective synthesis of 5-aryl-2-oxazolidinones under a CO2 atmosphere at room temperature, presumably due to aziridine activation assisted by hydrogen bonding on the basis of 1H NMR and in situ FT IR under CO2 pressure study.
Surface, textural and catalytic properties of pyridinium hydrogen sulfate ionic liquid heterogenized on activated carbon carrier
作者:Ivaylo Tankov、Hristo Kolev、Georgi Avdeev
DOI:10.1016/j.molliq.2021.117192
日期:2021.10
thermodynamic parameters such as equilibrium constant, activation energy, Gibbs free energy and activation energy barrier for the reaction of butyl acetate synthesis in the presence of xPHS/AC are determined. Textural characterization revealed the that xPHS/AC are mixed micro-mesoporous materials. The PHS heterogenization on AC affects both ionicliquid and support phases due to a surface PHS–AC interaction