Ionic Liquids Made with Dimethyl Carbonate: Solvents as well as Boosted Basic Catalysts for the Michael Reaction
作者:Massimo Fabris、Vittorio Lucchini、Marco Noè、Alvise Perosa、Maurizio Selva
DOI:10.1002/chem.200901891
日期:2009.11.16
introduces neat NMR spectroscopy of the ionic liquids as a probe for solute–solvent interactions as well as a tool for characterisation. Our studies show that high catalytic efficacy of functional ionic liquids can be achieved by integrating their green synthesis, along with a fine‐tuning of their structure. Demonstrating that ionic liquid solvents can be made by a truly green procedure, and that their properties
本文介绍了1)绿色合成一类甲基铵和甲基phosph离子液体(IL)的方法,2)如何通过阴离子交换来调节其酸碱性质,3)这些材料的完整的NMR光谱表征4)它们作为碱促进的碳-碳键形成反应的活性有机催化剂的应用。叔胺或膦与碳酸二甲酯的甲基化会导致形成无卤甲基碳酸甲酯盐,这些盐可以很容易地进行阴离子交换,生成一系列具有不同熔点,溶解度,酸碱性质的衍生物,稳定性和粘度。特别是用水处理,会产生碳酸氢盐交换的液态鎓盐。这些被证明具有很强的碱性,足以有效地催化迈克尔反应。实验表明,在这些系统中,相对于无机碳酸氢盐,碳酸氢盐的碱度提高了两个数量级。这些以催化量使用的碱性离子液体甚至比传统的强有机碱更好。本工作还介绍了离子液体的纯NMR光谱,作为溶质-溶剂相互作用的探针以及表征的工具。我们的研究表明,通过整合功能性离子液体的绿色合成以及对其结构进行微调,可以实现高催化效率。证明可以通过真正的绿色程序来制备离